optex its own format, so directly under tex/ and doc/

git-svn-id: svn://tug.org/texlive/trunk@58918 c570f23f-e606-0410-a88d-b1316a301751

86 files changed, 35626 insertions, 0 deletions

diff --git a/Master/texmf-dist/tex/optex/base/alloc.opm b/Master/texmf-dist/tex/optex/base/alloc.opm
new file mode 100644
index 00000000000..5d874134d41
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/alloc.opm
@@ -0,0 +1,173 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \newdimen {Allocators for registers <2021-02-15>} % loaded in format
+
+   \_doc -----------------------------
+   The limits are set first.
+   \_cod -----------------------------
+
+\_chardef\_maicount = 65535    % Max Allocation Index for counts registers in LuaTeX
+\_let\_maidimen  = \_maicount
+\_let\_maiskip   = \_maicount
+\_let\_maimuskip = \_maicount
+\_let\_maibox    = \_maicount
+\_let\_maitoks   = \_maicount
+\_chardef\_mairead  = 15
+\_chardef\_maiwrite = 15
+\_chardef\_maifam   = 255
+
+   \_doc -----------------------------
+   Each allocation macro needs its own counter.
+   \_cod -----------------------------
+
+\_countdef\_countalloc=10  \_countalloc=255
+\_countdef\_dimenalloc=11  \_dimenalloc=255
+\_countdef\_skipalloc=12   \_skipalloc=255
+\_countdef\_muskipalloc=13 \_muskipalloc=255
+\_countdef\_boxalloc=14    \_boxalloc=255
+\_countdef\_toksalloc=15   \_toksalloc=255
+\_countdef\_readalloc=16   \_readalloc=-1
+\_countdef\_writealloc=17  \_writealloc=-1
+\_countdef\_famalloc=18    \_famalloc=3
+
+   \_doc -----------------------------
+   The common allocation macro
+   \`\_allocator` `\<sequence> {<type>} \<primitive declarator>`
+   is defined. This idea was used in classical plain \TeX/ by
+   Donald Knuth too but the macro from plain \TeX/ seems to be
+   more complicated:).
+   \_cod -----------------------------
+
+\_def\_allocator #1#2#3{%
+   \_incr{\_cs{_#2alloc}}%
+   \_ifnum\_cs{_#2alloc}>\_cs{_mai#2}%
+      \_errmessage{No room for a new \_ea\_string\_csname #2\_endcsname}%
+   \_else
+      \_global#3#1=\_cs{_#2alloc}%
+      \_wlog{\_string#1=\_ea\_string\_csname #2\_endcsname\_the\_cs{_#2alloc}}%
+   \_fi
+}
+
+   \_doc -----------------------------
+   The allocation macros
+   \`\newcount`, \`\newdimen`, \`\newskip`, \`\newmuskip`, \`\newbox`,
+   \`\newtoks`, \`\newread`, \`\newwrite` and \`\newfam`
+   are defined here.
+   \_cod -----------------------------
+
+\_def\_newcount #1{\_allocator #1{count}\_countdef}
+\_def\_newdimen #1{\_allocator #1{dimen}\_dimendef}
+\_def\_newskip #1{\_allocator #1{skip}\_skipdef}
+\_def\_newmuskip #1{\_allocator #1{muskip}\_muskipdef}
+\_def\_newbox #1{\_allocator #1{box}\_chardef}
+\_def\_newtoks #1{\_allocator #1{toks}\_toksdef}
+\_def\_newread #1{\_allocator #1{read}\_chardef}
+\_def\_newwrite #1{\_allocator #1{write}\_chardef}
+\_def\_newfam #1{\_allocator #1{fam}\_chardef}
+
+\_public \newcount \newdimen \newskip \newmuskip \newbox \newtoks \newread \newwrite \newfam ;
+
+   \_doc -----------------------------
+   The \`\newinsert` macro is defined differently than others.
+   \_cod -----------------------------
+
+\_newcount\_insertalloc   \_insertalloc=255
+\_chardef\_insertmin = 201
+
+\_def\_newinsert #1{%
+   \_decr\_insertalloc
+   \_ifnum\_insertalloc <\_insertmin
+      \_errmessage {No room for a new \_string\insert}%
+   \_else
+      \_global\_chardef#1=\_insertalloc
+      \_wlog {\_string#1=\_string\_insert\_the\_insertalloc}%
+   \_fi
+}
+\_public \newinsert ;
+
+   \_doc -----------------------------
+   Other allocation macros \`\newattribute` and \`\newcatcodetable`
+   have their counter allocated by the `\newcount` macro.
+   \_cod -----------------------------
+
+\_newcount \_attributealloc  \_attributealloc=0
+\_chardef\_maiattribute=\_maicount
+\_def\_newattribute #1{\_allocator #1{attribute}\_attributedef}
+
+\_newcount \_catcodetablealloc  \_catcodetablealloc=10
+\_chardef\_maicatcodetable=32767
+\_def\_newcatcodetable #1{\_allocator #1{catcodetable}\_chardef}
+
+\_public \newattribute \newcatcodetable ;
+
+   \_doc -----------------------------
+   We declare public and private versions of `\tmpnum` and `\tmpdim`
+   registers separately. They are independent registers.
+   \_cod -----------------------------
+
+\_newcount \tmpnum  \_newcount \_tmpnum
+\_newdimen \tmpdim  \_newdimen \_tmpdim
+
+   \_doc -----------------------------
+   A few registers are initialized like in plain\TeX/. We absolutely
+   don't support the `@`category dance, so `\z@skip`
+   `\z@`, `\p@` etc. are not defined in \OpTeX/. If you need such
+   control sequences then you can initialize them by `\load[plain-at]`.
+
+   Only the \`\_zo` and \`\_zoskip` (equivalents to `\z@` and `\z@skip`)
+   are declared here and used in some internal macros of \OpTeX/
+   for improving speed.
+   \_cod -----------------------------
+
+\_newdimen\_maxdimen \_maxdimen=16383.99999pt % the largest legal <dimen>
+\_newdimen\_zo \_zo=0pt
+\_newskip\_hideskip \_hideskip=-1000pt plus 1fill % negative but can grow
+\_newskip\_centering \_centering=0pt plus 1000pt minus 1000pt
+\_newskip\_zoskip \_zoskip=0pt plus0pt minus0pt
+\_newbox\_voidbox % permanently void box register
+
+\_public \maxdimen \hideskip \centering \voidbox ;
+
+\_endcode %---------------------------------------------------
+
+Like plain\TeX, the allocators `\newcount`, `\newwrite`, etc. are defined.
+The registers are allocated from 256 to the `\_mai<type>` which is 65535 in
+\LuaTeX/.
+
+Unlike in Plain\TeX/, the mentioned allocators are not `\outer`.
+
+User can use `\dimen0` to `\dimen200` and similarly for `\skip`,
+`\muskip`, `\box`, and `\toks` directly. User can use
+`\count20` to `\count200` directly too. This is the same
+philosophy as in old plain\TeX/, but the range of directly used registers
+is wider.
+
+Inserts are allocated from 254 to 201 using `\newinsert`.
+
+You can define your own allocation concept (for example for allocation of
+arrays) from the top of the registers array. The example shows a definition of
+the array-like declarator of counters.
+
+\nobreak
+\begtt
+\newcount \_maicount    % redefine maximal allocation index as variable
+\_maicount = \maicount  % first value is top of the array
+
+\def\newcountarray #1[#2]{% \newcountarray \foo[100]
+    \global\advance\_maicount by -#2\relax
+    \ifnum \_countalloc > \_maicount
+        \errmessage{No room for a new array of \string\count}%
+    \else
+        \global\chardef#1=\_maicount
+    \fi
+}
+\def\usecount #1[#2]{%  \usecount \foo[2]
+    \count\numexpr#1+#2\relax
+}
+\endtt
+
+\_endinput
+
+2021-02-15  \_advance -> \_incr, \_decr
+2020-05-12  \newmath -> \newfam  bug fixing
+2020-01-23  released
diff --git a/Master/texmf-dist/tex/optex/base/basic-macros.opm b/Master/texmf-dist/tex/optex/base/basic-macros.opm
new file mode 100644
index 00000000000..4d465c30109
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/basic-macros.opm
@@ -0,0 +1,130 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \sdef {Basic macros for OpTeX <2021-02-03>} % loaded in format
+
+   \_doc ------------------------------
+   \`\bgroup`, \`\egroup`, \`\empty`, \`\space`, \`\null` and \`\wlog`
+   are classical macros from plain \TeX/.
+   \_cod ------------------------------
+
+\_let\_bgroup={  \_let\_egroup=}
+\_def \_empty {}
+\_def \_space { }
+\_def \_null {\_hbox{}}
+\_def \_wlog {\_immediate\_write-1 } % write on log file (only)
+\_public \bgroup \egroup \empty \space \null \wlog ;
+
+   \_doc ------------------------------
+   \`\ignoreit` ignores next token or `{<text>}`,
+   \`\useit``{<text>}` expands to `<text>` (removes outer braces),
+   \`\ignoresecond` uses first, ignores second parameter and
+   \`\usesecond` ignores first, uses second parameter.
+   \_cod ------------------------------
+
+\_long\_def \_ignoreit #1{}
+\_long\_def \_useit #1{#1}
+\_long\_def \_ignoresecond #1#2{#1}
+\_long\_def \_usesecond #1#2{#2}
+\_public \ignoreit \useit \ignoresecond \usesecond ;
+
+   \_doc ------------------------------
+   \`\bslash` is \"normal backslash" with category code 12.
+   \`\nbb` is double backslash
+   and \`\pcent` is normal~`%`.
+   They can be used in Lua codes, for example.
+   \_cod ------------------------------
+
+\_edef \_bslash {\_csstring\\}
+\_edef \_nbb {\_bslash\_bslash}
+\_edef \_pcent{\_csstring\%}
+\_public \bslash \nbb \pcent ;
+
+   \_doc ------------------------------
+   \`\sdef` `{<text>}` is equivalent to `\def\<text>`, where `\<text>` is a control
+   sequence. You can use arbitrary parameter mask after `\sdef{<text>}`, don't
+   put the (unwanted) space immediately after closing brace \code{\}}.
+   \nl
+   \`\sxdef` `{<text>}` is equivalent to `\xdef\<text>`.
+   \nl
+   \`\slet` `{<textA>}{<textB>}` is equivalent to `\let \<textA> = \<textB>`.
+   \_cod ------------------------------
+
+\_def \_sdef #1{\_ea\_def \_csname#1\_endcsname}
+\_def \_sxdef #1{\_ea\_xdef \_csname#1\_endcsname}
+\_def \_slet #1#2{\_ea\_let \_csname#1\_ea\_endcsname \_csname#2\_endcsname}
+\_public \sdef \sxdef \slet ;
+
+   \_doc ------------------------------
+   \`\adef` `{<char>}{<body>}` puts the <char> as active character and defines it
+   as `{<body>}`. You can declare a macro with parameters too. For example
+   `\adef @#1{...#1...}`.
+   \_cod ------------------------------
+
+\_def \_adef #1{\_catcode`#1=13 \_begingroup \_lccode`\~=`#1\_lowercase{\_endgroup\_def~}}
+\_public \adef ;
+
+   \_doc ------------------------------
+   \`\cs` `{<text>}` is only a shortcut to `\csname <text>\endcsname`, but you need
+   one more `\_ea` if you need to get the real control sequence `\<text>`.
+   \nl
+   \`\trycs` `{<csname>}{<text>}` expands to `\<csname>`
+   if it is defined else to the `<text>`.
+   \_cod ------------------------------
+
+\_def \_cs #1{\_csname#1\_endcsname}
+\_def \_trycs#1#2{\_ifcsname #1\_endcsname \_csname #1\_ea\_endcsname \_else #2\_fi}
+\_public \cs \trycs ;
+
+   \_doc ------------------------------
+   \`\addto` `\macro{<text>}` adds `<text>` to your `\macro`, which must be defined.
+   \_cod ------------------------------
+
+\_long\_def \_addto #1#2{\_ea\_def\_ea#1\_ea{#1#2}}
+\_public \addto ;
+
+   \_doc -----------------------------
+   \`\incr``<counter>` increases `<counter>` by one globally.
+   \`\decr``<counter>` decreases `<counter>` by one globally.
+   \_cod -----------------------------
+
+\_def\_incr #1{\_global\_advance#1by1 }
+\_def\_decr #1{\_global\_advance#1by-1 }
+\_public \incr \decr ;
+
+   \_doc ------------------------------
+   \`\opwarning` `{<text>}` prints warning on the terminal and to the log file.
+   \_cod ------------------------------
+
+\_def \_opwarning #1{\_wterm{WARNING l.\_the\_inputlineno: #1.}}
+\_public \opwarning ;
+
+   \_doc ------------------------------
+   \`\loggingall` and \`\tracingall` are defined similarly as in
+   plain \TeX/, but they print
+   more logging information to the log file and the terminal.
+   \_cod ------------------------------
+
+\_def\_loggingall{\_tracingcommands=3 \_tracingstats=2 \_tracingpages=1
+  \_tracingoutput=1 \_tracinglostchars=1 \_tracingmacros=2
+  \_tracingparagraphs=1 \_tracingrestores=1 \_tracingscantokens=1
+  \_tracingifs=1 \_tracinggroups=1 \_tracingassigns=1 }
+\_def\_tracingall{\_tracingonline=1 \_loggingall}
+\_public \loggingall \tracingall ;
+
+   \_doc ------------------------------
+   Write a warning if the user did not load a Unicode Font {\em or}
+   if there were unresolved references. \`\_byehook` is used in the \^`\bye` macro.
+   \_cod ------------------------------
+
+\_def\_byehook{%
+   \_ifx\_initunifonts\_relax \_relax\_else \_opwarning{Unicode font was not loaded}\_fi
+   \_ifnum\_unresolvedrefs>0 \_opwarning{Try to rerun to get references right}\_fi
+}
+
+\_endcode % -------------------------------------
+
+2021-02-03: \useit defined.
+2021-01-22: \trycs: \ea added in order to be able to use cs with parameters
+2021-01-08: \opwarning format changed (secondly, hope that conclusively)
+2020-10-12: \opwarning: line numbers added
+2020-02-14: introduced
diff --git a/Master/texmf-dist/tex/optex/base/bib-iso690.opm b/Master/texmf-dist/tex/optex/base/bib-iso690.opm
new file mode 100644
index 00000000000..c58709ce835
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/bib-iso690.opm
@@ -0,0 +1,906 @@
+% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+% bibliography style (iso690), version <2020-03-10>, loaded on demand by \usebib
+
+\_ifx\_optexbibstyle\_undefined \_errmessage
+   {This file can be read by: \_string\usebib/? (iso690) bibfiles command only}
+   \_endinput \_fi
+
+   \_doc -----------------------------
+   \`\_maybetod` (alias `\.` in the style file group) does not put the second dot.
+   \_cod -----------------------------
+
+\_def\_maybedot{\_ifnum\_spacefactor=\_sfcode`\.\_relax\_else.\_fi}
+\_tmpnum=\_sfcode`\. \_advance\_tmpnum by-2 \_sfcode`\.=\_tmpnum
+\_sfcode`\?=\_tmpnum \_sfcode`\!=\_tmpnum
+\_let\.=\_maybedot  % prevents from double periods
+
+   \_doc -----------------------------
+   Option field.
+   \_cod -----------------------------
+
+\_CreateField {option}
+\_def\_isbiboption#1#2{\_edef\_tmp{\_noexpand\_isbiboptionA{#1}}\_tmp}
+\_def\_isbiboptionA#1{\_def\_tmp##1 #1 ##2\_relax{%
+      \_if^##2^\_csname iffalse\_ea\_endcsname \_else\_csname iftrue\_ea\_endcsname \_fi}%
+   \_ea\_tmp\_biboptionsi #1 \_relax}
+\_def\_bibopt[#1]#2#3{\_isbiboption{#1}\_iftrue\_def\_tmp{#2}\_else\_def\_tmp{#3}\_fi\_tmp}
+\_def\_biboptionvalue#1#2{\_def\_tmp##1 #1:##2 ##3\_relax{\_def#2{##2}}%
+   \_ea\_tmp\_biboptionsi #1: \_relax}
+
+\_def\_readbiboptions{%
+   \_RetrieveFieldIn{option}\_biboptionsi
+   \_toks1=\_ea{\_biboptionsi}%
+   \_edef\_biboptionsi{\_space \_the\_toks1 \_space \_the\_biboptions \_space}%
+}
+\_newtoks\_biboptions
+\_public \biboptions ;
+
+   \_doc -----------------------------
+   Formating of Author/Editor lists.
+   \_cod -----------------------------
+
+\_def\_firstauthorformat{%
+   \_upper{\_Lastname}\_bprintc\_Firstname{, *}\_bprintc\_Von{ *}\_bprintc\_Junior{, *}%
+}
+\_def\_otherauthorformat{%
+   \_bprintc\_Firstname{* }\_bprintc\_Von{* }\_upper{\_Lastname}\_bprintc\_Junior{, *}%
+}
+\_def\_commonname{%
+  \_ifnum\_NameCount=1
+     \_firstauthorformat
+     \_ifx\_dobibmark\_undefined \_edef\_dobibmark{\_Lastname}\_fi
+  \_else
+     \_ifnum0\_namecount=\_NameCount
+        \_ifx\_maybeetal\_empty \_bibconjunctionand\_else , \_fi
+     \_else , \_fi
+     \_otherauthorformat
+  \_fi
+}
+\_def\_authorname{%
+   \_ifnum\_NameCount>0\_namecount\_relax\_else \_commonname \_fi
+   \_ifnum\_NameCount=0\_namecount\_relax \_maybeetal \_fi
+}
+\_let\_editorname=\_authorname
+
+\_def\_prepareauedoptions#1{%
+   \_def\_mabyetal{}\_csname lb@abbreviatefalse\_endcsname
+   \_biboptionvalue{#1max}\_authormax
+   \_biboptionvalue{#1min}\_authormin
+   \_biboptionvalue{#1pre}\_authorpre
+   \_biboptionvalue{#1print}\_authorprint
+   \_isbiboption{#1etal}\_iftrue \_def\_maybeetal{\_Mtext{bib.etal}}\_fi
+   \_biboptionvalue{#1trim}\_autrim
+   \_let\_namecountraw=\_namecount
+   \_ifx\_authormax\_empty \_else
+      \_ifnum 0\_authormax<0\_namecount
+         \_edef\_namecount{\_ifx\_authormin\_empty\_authormax\_else\_authormin\_fi}%
+         \_def\_maybeetal{\_Mtext{bib.etal}}%
+   \_fi\_fi
+   \_ifx\_autrim\_empty \_def\_autrim{10000}\_fi
+   \_ifnum\_autrim=0 \_def\_autrim{10000}\_fi
+   \_ifnum 0\_namecount<\_autrim\_relax \_else \_AbbreviateFirstname \_fi
+}
+\_def\_maybeetal{}
+
+\_ifx\upper\_undefined
+   \_ifx\caps \_undefined \_def\upper{\_uppercase\_ea}\_else
+                          \_def\upper#1{{\caps\_rm #1}}\_fi
+\_fi
+\_let\_upper=\upper
+
+   \_doc -----------------------------
+   Preparing bib-mark (used when `\nonumcitations` is set).
+   \_cod -----------------------------
+
+\_def\_setbibmark{%
+   \_ifx\_dobibmark\_undefined \_def\_dobibmark{}\_fi
+   \_RetrieveFieldIn{bibmark}\_tmp
+   \_ifx\_tmp\_empty \_RetrieveFieldIn{year}\_tmp \_edef\_tmp{\_dobibmark, \_tmp}\_fi
+   \_bibmark=\_ea{\_tmp}%
+}
+
+   \_doc -----------------------------
+   Setting phrases.
+   \_cod -----------------------------
+
+\_def\_bibconjunctionand{\_Mtext{bib.and}}
+\_def\_preurl{\_Mtext{bib.available}}
+\_let\_predoi=\_preurl
+\_def\_postedition{\_mtext{bib.edition}}
+\_def\_Inclause{In:~}
+\_def\_prevolume{\_mtext{bib.volume}}
+\_def\_prenumber{\_mtext{bib.number}}
+\_def\_prepages{\_mtext{bib.prepages}}
+\_def\_posteditor{\_ifnum0\_namecountraw>1 \_Mtext{bib.editors}\_else\_Mtext{bib.editor}\_fi}
+
+   \_doc ----------------------------
+   \`\_Mtext``{<identifier>}` expands to a
+   phrase by outer document language (no entry language).
+   \_cod -----------------------------
+
+\_chardef\_documentlanguage=\_language
+\_def\_Mtext#1{\_csname _mt:#1:\_csname _lan:\_the\_documentlanguage\_endcsname\_endcsname}
+
+\_CreateField {lang}
+\_def\_setlang#1{\_ifx#1\_empty \_else
+     \_ifcsname _mt:bib.and:#1\_endcsname \_language=\_csname _#1Patt\_endcsname \_relax
+     \_else \_opwarning{No phrases for "#1" used by [\EntryKey] in .bib}%
+   \_fi\_fi
+}
+
+   \_doc -----------------------------
+   Non-standard field names.
+   \_cod -----------------------------
+
+\_CreateField {ednote}
+\_CreateField {citedate}
+\_CreateField {numbering}
+\_CreateField {isbn}
+\_CreateField {issn}
+\_CreateField {doi}
+\_CreateField {url}
+\_CreateField {bibmark}
+
+   \_doc -----------------------------
+   Sorting.
+   \_cod -----------------------------
+
+\_SortingOrder{name,year}{lfvj}
+\_SpecialSort {key}
+
+   \_doc -----------------------------
+   Supporting macros.
+   \_cod -----------------------------
+
+\_def\_bibwarninga{\_bibwarning}
+\_def\_bibwarningb{\_bibwarning}
+
+\_def\_docitedate #1/#2/#3/#4\_relax{[\_Mtext{bib.citedate}%
+   \_if^#2^#1\_else
+      \_if^#3^#1/#2\_else
+         \_cs{_\_cs{_lan:\_the\_documentlanguage}dateformat}#1/#2/#3\relax
+   \_fi\_fi ]%
+}
+\_def\_doyear#1{
+   \_biboptionvalue{yearprint}\_yearprint
+   \_ifx\_yearprint\_empty#1\_else\_def\YEAR{#1}\_yearprint\_fi
+}
+\_def\_preparenumbering{%
+   \_def\VOL{\_RetrieveField{volume}}%
+   \_def\NO{\_RetrieveField{number}}%
+   \_def\PP{\_RetrieveField{pages}}%
+}
+\_def\_prepareednote{%
+   \_def\EDN{\_RetrieveField{edition}}%
+   \_def\ADDR{\_RetrieveField{address}}%
+   \_def\PUBL{\_RetrieveField{publisher}}%
+   \_def\YEAR{\_RetrieveField{year}}%
+   \_def\AU{\_bprintb[!author]{\_doauthor0{####1}}{}}%
+   \_def\ED{\_bprintb[!editor]{\_doeditor0{####1}}{}}%
+   \_preparenumbering
+}
+\_def\_doedition#1{%
+   \_biboptionvalue{editionprint}\_editionprint
+   \_ifx\_editionprint\_empty#1\_postedition\_else\_def\ED{#1}\_editionprint\_fi
+}
+\_def\_doauthor#1#2{\_prepareauedoptions{au}\_let\_iseditorlist=\_undefined
+   \_if1#1\_def\AU{#2}\_else\_let\_authorprint=\_empty\_fi
+   \_ifx\_authorprint\_empty #2\_else \_authorprint\_fi
+}
+\_def\_doeditor#1#2{\_prepareauedoptions{ed}\_let\_firstauthorformat=\_otherauthorformat
+   \_if1#1\_def\ED{#2}\_else\_let\_authorprint=\_empty\_fi
+   \_ifx\_authorprint\_empty #2\_posteditor\_else \_authorprint\_fi
+}
+
+   \_doc -----------------------------
+   Entry types.
+   \_cod -----------------------------
+
+\_sdef{_print:BEGIN}{%
+   \_readbiboptions
+   \_biboptionvalue{titlepost}\_titlepost
+   \_isbiboption{unpublished}\_iftrue \_let\_bibwarninga=\_relax \_let\_bibwarningb=\_relax \_fi
+   \_isbiboption{nowarn}\_iftrue \_let\_bibwarning=\_relax \_fi
+   \_isbiboption{urlalso}\_iftrue \_def\_preurl{\_Mtext{bib.availablealso}}\_fi
+   \_RetrieveFieldIn{lang}\_langentry \_setlang\_langentry
+}
+\_sdef{_print:END}{%
+   \_bprinta [note]       {*.}{}%
+   \_setbibmark
+}
+\_def\_bookgeneric#1{%
+   \_bprinta [howpublished]  {[*].\ }{}%
+   \_bprintb [edition]    {\_doedition{##1}\.\ }{}%
+   \_bprinta [ednote]     {*.\ }{}%
+   \_bprinta [address]    {*\_bprintv[publisher]{:}{\_bprintv[year]{,}{.}}\ }{\_bibwarninga}%
+   \_bprinta [publisher]  {*\_bprintv[year]{,}{.}\ }{\_bibwarninga}%
+   \_bprintb [year]       {\_doyear{##1}\_bprintv[citedate]{\_bprintv[numbering]{.}{}}{.}\ }%
+                                                                                     {\_bibwarning}%
+   \_bprinta [numbering]  {\_preparenumbering*\_bprintv[citedate]{}{\.}\ }{}%
+   \_bprinta [citedate]   {\_docitedate*///\_relax.\ }{}%
+   #1%
+   \_bprinta [series]     {*.\ }{}%
+   \_bprinta [isbn]       {ISBN~*.\ }{\_bibwarningb}%
+   \_bprinta [issn]       {ISSN~*.\ }{}%
+   \_bprintb [doi]        {\_predoi DOI \_ulink[http://dx.doi.org/##1]{##1}.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:book}{%
+   \_bprintb [!author]    {\_doauthor1{##1}\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\_bprintc\_titlepost{\.\ *}\_bprintv[howpublished]{}{\.}\ }%
+                                                                                     {\_bibwarning}%
+   \_bookgeneric{}%
+}
+\_sdef{_print:article}{%
+   \_biboptionvalue{journalpost}\_journalpost
+   \_bprintb [!author]   {\_doauthor1{##1}\.\ }{\_bibwarning}%
+   \_bprinta [title]     {*.\ \_bprintc\_titlepost{*.\ }}{\_bibwarning}%
+   \_bprintb [journal]   {{\_em##1}\_bprintc\_journalpost{\.\ *}\_bprintv[howpublished]{}{\.}\ }%
+                                                                                     {\_bibwarninga}%
+   \_bprinta [howpublished]  {[*].\ }{}%
+   \_bprinta [address]   {*\_bprintb[publisher]{:}{,}\ }{}%
+   \_bprinta [publisher] {*, }{}%
+   \_bprinta [month]     {*, }{}%
+   \_bprintb [year]      {\_doyear{##1}\_bprintv[volume,number,pages]{,}{\.}\ }{}%
+   \_bprinta [numbering] {\_preparenumbering*\_bprintv[citedate]{}{\.}\ }
+                        {\_bprinta [volume] {\_prevolume*\_bprintv[number,pages]{,}{\.}\ }{}%
+                         \_bprinta [number] {\_prenumber*\_bprintv[pages]{,}{\.}\ }{}%
+                         \_bprintb [pages]  {\_prepages\_hbox{##1}\_bprintv[citedate]{}{\.}\ }%
+                                                                                     {\_bibwarninga}}%
+   \_bprinta [citedate]  {\_docitedate*///\_relax.\ }{}%
+   \_bprinta [issn]      {ISSN~*.\ }{}%
+   \_bprintb [doi]       {\_predoi DOI \_ulink[http://dx.doi.org/##1]{##1}.\ }{}%
+   \_bprintb [url]       {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:inbook}{%
+   \_let\_bibwarningb=\_relax
+   \_bprintb [!author]   {\_doauthor1{##1}\.\ }{\_bibwarning}%
+   \_bprinta [title]     {*.\ }{\_bibwarning}%
+                        \_Inclause
+   \_bprintb [!editor]   {\_doeditor1{##1}\.\ }{}%
+   \_bprintb [booktitle] {{\_em##1}\_bprintc\_titlepost{\.\ *}\_bprintv[howpublished]{}{\.}\ }%
+                                                                                     {\_bibwarning}%
+   \_bookgeneric{\_bprintb [pages]  {\_prepages\_hbox{##1}. }{}}%
+}
+\_slet{_print:inproceedings}{_print:inbook}
+\_slet{_print:conference}{_print:inbook}
+
+\_sdef{_print:thesis}{%
+   \_bprintb [!author]    {\_doauthor1{##1}\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\_bprintc\_titlepost{\.\ *}\_bprintv[howpublished]{}{\.}\ }%
+                                                                                     {\_bibwarning}%
+   \_bprinta [howpublished]  {[*].\ }{}%
+   \_bprinta [address]    {*\_bprintv[school]{:}{\_bprintv[year]{,}{.}}\ }{\_bibwarning}%
+   \_bprinta [school]     {*\_bprintv[year]{,}{.}\ }{\_bibwarning}%
+   \_bprinta [month]      {*, }{}%
+   \_bprintb [year]       {\_doyear{##1}\_bprintv[citedate]{}{.}\ }{\_bibwarninga}%
+   \_bprinta [citedate]   {\_docitedate*///\_relax.\ }{}%
+   \_bprinta [type]       {*\_bprintv[ednote]{,}{.}\ }%
+                         {\_ifx\_thesistype\_undefined\_bibwarning
+                          \_else\_thesistype\_bprintv[ednote]{,}{.}\ \_fi}%
+   \_bprinta [ednote]     {*.\ }{}%
+   \_bprintb [doi]        {\_predoi DOI \_ulink[http://dx.doi.org/##1]{##1}.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:phdthesis}{\_def\_thesistype{\_Mtext{bib.phdthesis}}\_cs{_print:thesis}}
+\_sdef{_print:mastershesis}{\_def\_thesistype{\_Mtext{bib.masthesis}}\_cs{_print:thesis}}
+\_sdef{_print:bachelorsthesis}{\_def\_thesistype{\_Mtext{bib.bachthesis}}\_cs{_print:thesis}}
+
+\_sdef{_print:generic}{%
+   \_bprintb [!author]    {\_doauthor1{##1}\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\_bprintc\_titlepost{\.\ *}\_bprintv[howpublished]{}{\.}\ }%
+                                                                                     {\_bibwarning}%
+   \_bprinta [howpublished]  {[*].\ }{}%
+   \_bprinta [ednote]     {\_prepareednote*\_bprintv[citedate]{}{.}\ }{\_bibwarning}%
+   \_bprinta [year]       {}{\_bibwarning}%
+   \_bprinta [citedate]   {\_docitedate*///\_relax.\ }{}%
+   \_bprintb [doi]        {\_predoi DOI \_ulink[http://dx.doi.org/##1]{##1}.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_slet{_print:booklet}{_print:generic}
+\_slet{_print:incolleciton}{_print:generic}
+\_slet{_print:manual}{_print:generic}
+\_slet{_print:proceedings}{_print:generic}
+\_slet{_print:techreport}{_print:generic}
+\_slet{_print:unpublished}{_print:generic}
+
+\_sdef{_print:misc}{\_let\_bibwarning=\_relax \_cs{_print:generic}}
+
+\_endcode
+
+
+This is the iso690 bibliographic style used by \OpTeX/.
+
+See `op-biblist.bib` for an example of the `.bib` input. You can try it by:
+
+\begtt
+\fontfam[LMfonts]
+\nocite[*]
+\usebib/s (iso690) op-biblist
+\end
+\endtt
+
+\seccc Common rules in \code{.bib} files
+
+There are entries of type `@FOO{...}` in the `.bib` file. Each entry consists of
+fields in the form `name = "value"`, or `name = {value}`. No matter which form is
+used. If the value is pure numeric then you can say simply `name = value`.
+Warning: the comma after each field value is mandatory! If it is missing then the
+next field is ignored or badly interpreted.
+
+The entry names and field names are case insensitive. If there exists a data
+field no mentioned here then it is simply ignored. You can use it to store
+more information (abstract, for example).
+
+There are \"standard fields" used in ancient bib\TeX/ (author, title, editor, edition,
+etc., see \url{http://en.wikipedia.org/wiki/BibTeX}). The `iso690` style introduces
+several \"non-standard" fields: ednote, numbering, isbn, issn, doi, url,
+citedate, key, bibmark. They are documented here.
+
+Moreover, there are two optional special fields:
+
+\begitems
+* lang     = language of the entry. The hyphenation plus autogenerated phrases and
+             abbreviations will be typeset by this language.
+* option   = options by which you can control a special printing of various fields.
+\enditems
+
+There can be only one option field per each entry with (maybe) more options
+separated by spaces. You can declare the global option(s) in your document
+applied for each entry by `\biboptions={...}`.
+
+
+\seccc The author field
+
+All names in the author list have to be separated by \"\code{ and }".
+Each author can be written in various formats (the `von` part is typically missing):
+
+\begtt
+Firstname(s) von Lastname
+or
+von Lastname, Firstname(s)
+or
+von Lastname, After, Firstname(s)
+\endtt
+Only the Lastname part is mandatory. Examples:
+\begtt
+Petr Olšák
+or
+Olšák, Petr
+
+Leonardo Piero da Vinci
+or
+da Vinci, Leonardo Piero
+or
+da Vinci, painter, Leonardo Piero
+\endtt
+The separator \"\code{ and }" between authors
+will be converted to comma during
+printing, but between the semifinal and final author the word \"and" (or something
+different depending on the current language) is printed.
+
+The first author is printed in reverse order: \"LASTNAME, Firstname(s) von,
+After" and the other authors are printed in normal order: \"Firstname(s)
+von LASTNAME, After". This feature follows the ISO 690 norm. The Lastname
+is capitalized using uppercase letters. But if the `\caps` font modifier is defined,
+then it is used and printed `{\caps\_rm Lastname}`.
+
+You can specify the option `aumax:<number>`. The `<number>` denotes the
+maximum authors to be printed. The rest of the authors are ignored and the
+`et~al.` is appended to the list of printed authors. This text is
+printed only if the `aumax` value is less than the real number of authors.
+If you have the same number of authors in the .bib file as you need to print
+but you want to append `et~al.` then you can use `auetal` option.
+
+There is an `aumin:<number>` option which denotes the definitive number of
+printed authors if the author list is not fully printed due to `aumax`.
+If `aumin` is unused then `aumax` authors are printed in this case.
+
+All authors are printed if `aumax:<number>` option isn't given.
+There is no internal limit. But you can set the global options in
+your document by setting the `\biboptions` tokens list. For example:
+
+\begtt
+\biboptions={aumax:7 aumin:1}
+% if there are 8 or more authors then only the first author is printed.
+\entdd
+
+Examples:
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+\endtt
+output:    GREEN, John, Bob BROWN, and Alice BLACK.
+
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+option = "aumax:1",
+\endtt
+output:    GREEN, John~et~al.
+
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+option = "aumax:2",
+\endtt
+output:    GREEN, John, Bob BROWN~et~al.
+
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+option = "aumax:3",
+\endtt
+output:    GREEN, John, Bob BROWN, and Alice BLACK.
+
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+option = "auetal",
+\endtt
+output:    GREEN, John, Bob BROWN, Alice BLACK~et~al.
+
+If you need to add a text before or after the author's list, you can use
+the `auprint:{<value>}` option. The <value> will be printed instead of the
+authors list. The <value> can include `\AU` macro which expands to the authors
+list. Example:
+
+\begtt
+author = "Robert Calbraith",
+option = "auprint:{\AU\space [pseudonym of J. K. Rowling]}",
+\endtt
+output:    CALBRAITH Robert [pseudonym of J. K. Rowling].
+
+You can use the `autrim:<number>` option. All Firstnames of all authors
+are trimmed (i. e. reduced to initials) iff the number of authors in the
+author field is greater than or equal to `<number>`. There is an exception:
+`autrim:0` means that no Firstnames are trimmed. This is the default behavior.
+Another example: `autrim:1` means that all Firstnames are trimmed.
+
+\begtt
+author = "John Green and Bob Brown and Alice Black",
+option = "auetal autrim:1",
+\endtt
+output:    GREEN, J., B. BROWN, A. BLACK~et~al.
+
+If you need to write a team name or institution instead of authors, replace all
+spaces by `\ ` in this name. Such text is interpreted as Lastname. You
+can add the secondary name (interpreted as Firstname) after the comma. Example:
+
+\begtt
+   author = "Czech\ Technical\ University\ in\ Prague,
+             Faculty\ of\ Electrical\ Engeneering",
+\endtt
+output:  CZECH TECHNICAL UNIVERSITY IN PRAGUE, Faculty of Electrical Engeneering.
+
+
+\seccc The editor field
+
+The editor field is used for the list of the authors of the collection. The
+analogous rules as in author field are used here. It means that the
+authors are separated by \"\code{ and }", the Firstnames, Lastnames, etc. are
+interpreted and you can use the options `edmax:<number>`, `edmin:<number>`,
+`edetal`, `edtrim:<number>` and `edprint:{<value>}` (with `\ED` macro).
+Example:
+\begtt
+editor = "Jan Tomek and Petr Karas",
+option = "edprint:{\ED, editors.} edtrim:1",
+\endtt
+Output:   J. TOMEK and P. KARAS, editors.
+
+If `edprint` option is not set then `{\ED, eds.}` or `{\ED, ed.}` is used
+depending on the entry language and on the singular or plural of
+the editor(s).
+
+
+\seccc The ednote field
+
+The ednote field is used as the secondary authors and more editional info. The
+value is read as raw data without any interpretation of Lastname, Firstname
+etc.
+\begtt
+ednote = "Illustrations by Robert \upper{Agarwal}, edited by Tom \upper{Nowak}",
+\endtt
+output:   Illustrations by Robert AGARWAL, edited by Tom NOWAK.
+
+The `\upper` command has to be used for Lastnames in the ednote field.
+
+
+\seccc The title field
+
+This is the title of the work. It will be printed (in common entry types) by
+italics. The ISO 690 norm declares, that the title plus optional subtitle
+are in italics and they are separated by a colon. Next, the optional secondary
+title has to be printed in an upright font. This can be added by
+`titlepost:{<value>}`. Example:
+
+\begtt
+title = "The Simple Title of The Work",
+or
+title = "Main Title: Subtitle",
+or
+title  = "Main Title: Subtitle",
+option = "titlepost:{Secondary title}",
+\endtt
+The output of the last example:
+{\it Main Title: Subtitle}. Secondary title.
+
+
+\seccc The edition field
+
+This field is used only for second or more edition of cited work. Write
+only the number without the word "edition". The shortcut "ed." (or something
+else depending on the current language) is added automatically. Examples:
+
+\begtt
+edition = "Second",
+edition = "2nd",
+edition = "2$^{\rm nd}$",
+edition = "2.",
+\endtt
+Output of the last example:   2. ed.
+
+\begtt
+edition = "2."
+lang    = "cs",
+\endtt
+Output:   2. vyd.
+
+Note, that the example `edition = "Second"` may cause problems. If you are
+using language "cs" then the output is bad:   Second vyd.
+But you can use `editionprint:{<value>}` option. The the <value> is printed
+instead of edition field and shortcut. The edition field must be set. Example:
+
+\begtt
+edition = "whatever",
+option  = "editionprint:{Second full revised edition}",
+\endtt
+Output:   Second full revised edition.
+
+You can use `\EDN` macro in `editionprint` value. This macro is expanded
+to the edition value. Example:
+
+\begtt
+edition = "Second",
+option  = "editionprint:{\EDN\space full revised edition}",
+or
+edition = "Second full revised edition",
+option  = "editionprint:{\EDN}",
+\endtt
+
+
+\seccc The address, publisher, year fields
+
+This is an anachronism from ancient Bib\TeX/ (unfortunately no exclusive) that
+the address field includes only the city of the publisher's residence. No more
+data are here. The publisher field includes the name of the publisher.
+
+\begtt
+address = "Berlin",
+publisher = "Springer Verlag",
+year = 2012,
+\endtt
+Output:   Berlin: Springer Verlag, 2012.
+
+Note, that the year needn't to be inserted into quotes because it is pure
+numeric.
+
+The letter a, b, etc. are appended to the year automatically if two or more
+subsequent entries in the bibliography list are not distinct by the first
+author and year fields. If you needn't this feature, you can use the
+`noautoletters` option.
+
+You can use "yearprint:{<value>}" option. If it is set then the <value>
+is used for printing year instead the real field value. The reason: year is
+sort sensitive, maybe you need to print something else than only sorting key.
+Example:
+
+\begtt
+year   = 2000,
+option = "yearpint:{© 2000}",
+\endtt
+Output:  © 2000,  sorted by:  2000.
+
+\begtt
+year   = "2012a",
+option = "yearprint:{2012}",
+\endtt
+Output:  2012,   sorted by:  2012a.
+
+The address, publisher, and year are typically mandatory fields. If they are
+missing then the warning occurs. But you can set `unpublished`
+option. Then this warning is suppressed. There is no difference in the
+printed output.
+
+
+\seccc The url field
+
+Use it without `\url` macro, but with `http://` prefix. Example:
+
+\begtt
+url = "http://petr.olsak.net/opmac.html",
+\endtt
+
+The ISO 690 norm recommends to add the text \"Available from" (or
+something else if a different current language is used) before URL.
+It means, that the output of the previous example is:
+
+Available from \url{http://petr.olsak.net/opmac.html}.
+
+If the `cs` language is the current one than the output is:
+
+Dostupné z: \url{http://petr.olsak.net/opmac.html}.
+
+If the `urlalso` option is used, then the added text has the form
+\"Available also from" or \"Dostupné také z:" (if `cs` language is
+current).
+
+
+\seccc The citedate field
+
+This is the citation date. The field must be in the form year/month/day. It
+means, that the two slashes must be written here. The output depends on the
+current language. Example:
+
+\begtt
+citedate = "2004/05/21",
+\endtt
+Output when `en` is current:    [cit. 2004-05-21].\nl
+Output when `cs` is current:    [vid. 21.~5.~2004].
+
+
+\seccc The howpublished field
+
+This declares the available medium for the cited document if it is not in printed
+form. Alternatives: online, CD, DVD, etc. Example:
+
+\begtt
+howpublished = "online",
+\endtt
+Output:   [online].
+
+
+\seccc The volume, number, pages and numbering fields
+
+The volume is the \"big mark" of the journal issue and the number is the
+\"small mark" of the journal issue and pages includes the page range of
+the cited article in the journal. The volume is prefixed by Vol.~,
+the number by No.~, and the pages by pp.~. But these prefixes depends on the
+language of the entry.
+
+Example:
+
+\begtt
+volume = 31,
+number = 3,
+pages  = "37--42",
+\endtt
+Output:   Vol.~31, No.~3, pp.~37--42.
+
+\begtt
+volume = 31,
+number = 3,
+pages  = "37--42",
+lang   = "cs",
+\endtt
+Output:   ročník~31, č.~3, s.~37--42.
+
+If you disagree with the default prefixes, you can use the numbering field.
+When it is set then it is used instead of volume, number, pages fields
+and instead of any mentioned prefixes. The numbering can include macros
+`\VOL`, `\NO`, `\PP`, which are expanded to the respective values of fields. Example:
+
+\begtt
+volume    = 31,
+number    = 3,
+pages     = "37--42"
+numbering = "Issue~\VOL/\NO, pages~\PP",
+\endtt
+Output:   Issue~31/3, pages~37--42
+
+Note: The volume, numbers, and pages fields are printed without numbering
+filed only in the `@ARTICLE` entry. It means, that if you need to visible them
+in the `@INBOOK`, `@INPROCEEDINGS` etc. entries, then you must use the numbering field.
+
+
+\seccc Common notes about entries
+
+The order of the fields in the entry is irrelevant. We use the printed order
+in this manual. The exclamation mark (!) denotes the mandatory field. If
+the field is missing then a warning occurs during processing.
+
+If the `unpublished` option is set then the fields address, publisher, year,
+isbn, and pages are not mandatory. If the `nowarn` option is set then no
+warnings about missing mandatory fields occur.
+
+If the field is used but not mentioned in the entry documentation below then
+it is silently ignored.
+
+\secccc The `@BOOK` entry
+
+This is used for book-like entries.
+
+Fields: author(!), title(!), howpublished, edition, ednote, address(!),
+publisher(!), year(!), citedate, series, isbn(!), doi, url, note.
+
+The ednote field here means the secondary authors (illustrator, cover design
+etc.).
+
+\secccc The `@ARTICLE` entry
+
+This is used for articles published in a journal.
+
+Fields: author(!), title(!), journal(!), howpublished, address, publisher,
+month, year, [numbering or volume, number, pages(!)], citedate, issn,
+doi, url, note.
+
+If the numbering is used then it is used instead volume, number, pages.
+
+
+\secccc The `@INBOOK` entry
+
+This is used for the part of a book.
+
+Fields: author(!), title(!), booktitle(!), howpublished, edition, ednote,
+address(!), publisher(!), year(!), numbering, citedate, series, isbn or
+issn, doi, url, note.
+
+The author field is used for author(s) of the part, the editor field
+includes author(s) or editor(s) of the whole document. The pages field specifies
+the page range of the part. The series field can include more information
+about the part (chapter numbers etc.).
+
+The `@INPROCEEDINGS` and `@CONFERENCE` entries are equivalent to `@INBOOK` entry.
+
+\secccc The `@THESIS` entry
+
+This is used for the student's thesis.
+
+Fields: author(!), title(!), howpublished, address(!), school(!),
+month, year(!), citedate, type(!), ednote, doi, url, note.
+
+The type field must include the text \"Master's Thesis" or something
+similar (depending on the language of the outer document).
+
+There are nearly equivalent entries: `@BACHELORSTHESIS`, `@MASTERSTHESIS` and
+`@PHDTHESIS`. These entries set the type field to an appropriate value
+automatically. The type field is optional in this case. If it is used then
+it has precedence before the default setting.
+
+\secccc The @MISC entry
+
+It is intended for various usage.
+
+Fields: author, title, howpublished, ednote, citedate, doi, url, note.
+
+You can use `\AU`, `\ED`, `\EDN`, `\VOL`, `\NO`, `\PP`, `\ADDR`, `\PUBL`,
+`\YEAR` macros in ednote field. These macros print authors list, editors list,
+edition, volume, number, pages, address, publisher, and year field values
+respectively.
+
+The reason for this entry is to give to you the possibility to set the format of
+entry by your own decision. The most of data are concentrated in the ednote field.
+
+\secccc The `@BOOKLET`, `@INCOLLECION`, `@MANUAL`, `@PROCEEDINGS`, `@TECHREPORT`, `@UNPUBLISHED` entries
+
+These entries are equivalent to `@MICS` entry because we need to save the
+simplicity. They are implemented only for (almost) backward compatibility
+with the ancient Bib\TeX/. But the ednote is mandatory field here, so you
+cannot use these entries from the old databases without warnings and without
+some additional work with the `.bib` file.
+
+\seccc The cite-marks (bibmark) used when \code{\\nonumcitations} is set
+
+When `\nonumcitations` is set then `\cite` prints text-oriented
+bib-marks instead of numbers. This style file auto-generates these marks in the
+form \"Lastname of the first author, comma, space, the year" if the bibmark field
+isn't declared. If you need to set an exception from this common format,
+then you can use bibmark field.
+
+The OPmac trick \url{http://petr.olsak.net/opmac-tricks-e.html\#bibmark}
+describes how to redefine the algorithm for bibmark auto-generating when you
+need the short form of the type [Au13].
+
+
+\seccc Sorting
+
+If `\usebib/c` is used then entries are sorted by citation order in the text.
+If `\usebib/s` is used then entries are sorted by \"Lastname, Firstname(s)" of
+the first author and if more entries have this value equal, then the year is
+used (from older to newer). This feature follows the recommendation of the
+ISO 690 norm.
+
+If you have the same authors and the same year, you can control the sorting
+by setting years like 2013, 2013a, 2013b, etc. You can print something
+different to the list using `yearprint{<value>}` option, see the section about
+address, publisher, and year above. The real value of year field (i.e.\ not
+yearprint value) is also used in the text-oriented bib-marks when
+`\nonumcitations` is set.
+
+If you have some problems with name sorting, you can use the hidden field
+`key`, which is used for sorting instead of the \"Lastname Firstname(s)"
+of authors. If the `key` field is unset then the \"Lastname Firstname(s)"
+is used for sorting normally. Example:
+
+\begtt
+author    = "Světla Čmejrková",
+key       = "Czzmejrkova Svetla",
+\endtt
+
+This entry is now sorted between C and D.
+
+The norm recommends placing the auto-citations at the top of the list of
+references. You can do this by setting  `key = "@"`, to each entry with your
+name because the `@` character is sorted before `A`.
+
+
+\seccc Languages
+
+There is the language of the outer document and the languages of each entry.
+The ISO 690 norm recommends that the technical notes (the prefix before URL,
+the media type, the \"and" conjunction between the semifinal and final author)
+maybe printed in the language of the outer document. The data of the entry
+have to be printed in the entry language (edition ed./vyd., Vol./ročník,
+No./č. etc.). Finally, there are the phrases independent of the language
+(for example In:). Unfortunately, the bib\TeX/ supposes that the entry data
+are not fully included in the fields so the automaton has to add some
+text during processing (\"ed.", \"Vol.", \"see also", etc.).
+But what language has to be chosen?
+
+The current value of the `\language` register at the start of the `.bib`
+processing is described as the language of the outer document. This language
+is used for technical notes regardless of the entry language. Moreover,
+each entry can have the `lang` field (short name of the language). This
+language is used for ed./vyd., vol./ročník, etc. and it is used for
+hyphenation too. If the `lang` is not set then the outer document
+language is used.
+
+You can use \^`\_Mtext{bib.<identifier>}` if you want to use a phrase
+dependent on outer document language (no on entry language).
+Example:
+
+\begtt
+howpublished = "\_Mtext{bib.blue-ray}"
+\endtt
+
+Now, you can set the variants of `bib.blue-ray` phrase for various
+languages:
+
+\begtt
+\_sdef{_mt:bib.blue-ray:en} {Blue-ray disc}
+\_sdef{_mt:bib.blue-ray:cs} {Blue-ray disk}
+\endtt
+
+
+\seccc Summary of non-standard fields
+
+This style uses the following fields unknown by bib\TeX/:
+
+\begtt
+option    ... options separated by spaces
+lang      ... the language two-letter code of one entry
+ednote    ... edition info (secondary authors etc.) or
+              global data in @MISC-like entries
+citedate  ... the date of the citation in year/month/day format
+numbering ... format for volume, number, pages
+isbn      ... ISBN
+issn      ... ISSN
+doi       ... DOI
+url       ... URL
+\endtt
+
+
+\seccc Summary of options
+
+\begtt \catcode`\<=13
+aumax:<number>       ... maximum number of printed authors
+aumin:<number>       ... number of printed authors if aumax exceeds
+autrim:<number>      ... full Firstnames iff number of authors are less than this
+auprint:{<value>}     ... text instead authors list (\AU macro may be used)
+edmax, edmin, edtrim ... similar as above for editors list
+edprint:{<value>}     ... text instead editors list (\ED macro may be used)
+titlepost:{<value>}   ... text after title
+yearprint:{<value>}   ... text instead real year (\YEAR macro may be used)
+editionprint:{<value>} .. text instead of real edition (\EDN macro may be used)
+urlalso      ... the ``available also from'' is used instead ``available from''
+unpublished  ... the publisher etc. fields are not mandatory
+nowarn       ... no mandatory fields
+\endtt
+
+Other options in the option field are silently ignored.
diff --git a/Master/texmf-dist/tex/optex/base/bib-simple.opm b/Master/texmf-dist/tex/optex/base/bib-simple.opm
new file mode 100644
index 00000000000..dff747bd57b
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/bib-simple.opm
@@ -0,0 +1,164 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+% bibliography style (simple), version <2020-03-10>, loaded on demand by \usebib
+
+\_ifx\_optexbibstyle\_undefined \_errmessage
+   {This file can be read by: \_string\usebib/? (simple) bibfiles command only}
+   \_endinput \_fi
+
+% misc:
+
+\_def\_maybedot{\_ifnum\_spacefactor=\_sfcode`\.\_relax\_else.\_fi}
+\_tmpnum=\_sfcode`\. \_advance\_tmpnum by-2 \_sfcode`\.=\_tmpnum 
+\_sfcode`\?=\_tmpnum \_sfcode`\!=\_tmpnum
+\_let\.=\_maybedot  % prevents from double periods
+
+% Formatting of Author/Editor lists:
+
+\_def\_authorname{%
+  \_ifnum\_NameCount>1
+     \_ifnum0\_namecount=\_NameCount \_mtext{bib.and}\_else , \_fi
+  \_else
+     \_ifx\_dobibmark\_undefined \_edef\_dobibmark{\_Lastname}\_fi
+  \_fi
+  \_bprintc\_Firstname{* }\_bprintc\_Von{* }\_Lastname\_bprintc\_Junior{, *}%
+}
+\_let\_editorname=\_authorname
+
+% Preparing bib-mark (used when \nonumcitations is set):
+
+\_def\_setbibmark{%  
+   \_ifx\_dobibmark\_undefined \_def\_dobibmark{}\_fi
+   \_RetrieveFieldIn{bibmark}\_tmp      
+   \_ifx\_tmp\_empty \_RetrieveFieldIn{year}\_tmp \_edef\_tmp{\_dobibmark, \_tmp}\_fi                
+   \_bibmark=\_ea{\_tmp}%
+}
+
+\_def\_preurl{\_hfil\_break} 
+
+% Non-standard fieldnames:
+
+\_CreateField {isbn}
+\_CreateField {doi}
+\_CreateField {url}
+\_CreateField {bibmark}
+
+% Sorting:
+
+\_SortingOrder{name,year}{lfvj}
+\_SpecialSort {key}
+
+% Entry types:
+
+\_sdef{_print:END}{%
+   \_bprinta [note]       {*.}{}%
+   \_setbibmark
+}  
+\_sdef{_print:book}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}.\ }{\_bibwarning}%
+   \_bprinta [edition]    {*~\_mtext{bib.edition}.\ }{}%
+   \_bprinta [address]    {*: }{\_bibwarning}%
+   \_bprinta [publisher]  {*, }{\_bibwarning}%
+   \_bprinta [year]       {*.\ }{\_bibwarning}%
+   \_bprinta [isbn]       {ISBN~*.\ }{\_bibwarning}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:article}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprinta [title]      {*.\ }{\_bibwarning}%
+   \_bprintb [journal]    {{\_em##1}.\ }{\_bibwarning}%
+   \_bprinta [year]       {*, }{}%
+   \_bprinta [volume]     {* }{}%
+   \_bprinta [number]     {(*), }{}%
+   \_bprinta [pages]      {*.\ }{}%
+   \_bprintb [doi]        {DOI~\_ulink[http://dx.doi.org/##1]{##1}.\ }{}%
+}
+\_sdef{_print:inbook}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1.}\ }{\_bibwarning}%
+                         In:~%
+   \_bprinta [!editor]    {*,~eds.\ }{}%
+   \_bprintb [booktitle]  {{\_em##1}.\ }{\_bibwarning}% 
+   \_bprinta [address]    {*: }{\_bibwarning}%
+   \_bprinta [publisher]  {*, }{\_bibwarning}%
+   \_bprinta [year]       {*.\ }{\_bibwarning}%
+   \_bprinta [chapter]    {*.\ }{%
+                         \_bprinta [pages]      {*.\ }{}}%
+   \_bprinta [isbn]       {ISBN~*.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_slet{_print:inproceedings}{_print:inbook}
+
+\_sdef{_print:incolection}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}.\ }{\_bibwarning}%
+   \_bprinta [crossreff]  {In~\_cite[*]. }{%
+                         \_bprinta [booktitle]  {*. }{\_bibwarning}%
+                         \_bprinta [!editor]    {*,~eds.\ }{\_bibwarning}%
+                         \_bprinta [edition]    {*~\_mtext{bib.edition}.\ }{\_bibwarning}%
+                         \_bprinta [address]    {*: }{\_bibwarning}%
+                         \_bprinta [publisher]  {*, }{\_bibwarning}%
+                         \_bprinta [year]       {*.\ }{\_bibwarning}%
+                         \_bprinta [pages]      {*.\ }{}%   
+                         \_bprintb [url]        {\_preurl\_url{####1}. }{}}%
+}
+\_sdef{_print:conference}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+   \_bprinta [edition]    {*~\_mtext{bib.edition}.\ }{}%
+   \_bprinta [address]    {*: }{\_bibwarning}%
+   \_bprinta [publisher]  {*, }{\_bibwarning}%
+   \_bprinta [year]       {*.\ }{\_bibwarning}%
+   \_bprinta [isbn]       {ISBN~*.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:thesis}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+   \_bprinta [type]       {*,\ }{\_bibwarning}%
+   \_bprinta [school]     {*.\ }{}%
+   \_bprinta [address]    {*, }{}%
+   \_bprinta [year]       {*.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:proceedings}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+   \_bprinta [publisher]  {*.\ }{%
+                         \_bprinta [organization] {*.\ }{\_bibwarning}}%
+}   
+\_sdef{_print:techreport}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+                         \_mtext{bib.techreport}.
+   \_bprinta [institution] {*.\ }{}%
+}
+\_sdef{_print:booklet}{%
+   \_bprinta [!author]    {*\.\ }{\_bibwarning}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+   \_bprinta [howpublished] {*.\ }{\_bibwarning}%
+}
+\_sdef{_print:manual}{%
+   \_bprinta [!author]    {*\.\ }{}%
+   \_bprintb [title]      {{\_em##1}\.\ }{\_bibwarning}%
+   \_bprinta [year]       {*.\ }{}%
+   \_bprinta [institution] {*.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+\_sdef{_print:misc}{%
+   \_bprinta [!author]    {*\.\ }{}%
+   \_bprintb [title]      {{\_em##1}\.\ }{}%
+   \_bprinta [howpublished] {*.\ }{}%
+   \_bprinta [institution] {*.\ }{}%
+   \_bprinta [series]     {*.\ }{}%
+   \_bprinta [year]       {*.\ }{}%
+   \_bprintb [url]        {\_preurl\_url{##1}. }{}%
+}
+
+%%% end of the style file
+
+\_endcode
+
+You can copy this file to bib-yourname.opm and modify it by your
+needs...
diff --git a/Master/texmf-dist/tex/optex/base/cite-bib.opm b/Master/texmf-dist/tex/optex/base/cite-bib.opm
new file mode 100644
index 00000000000..26a5b17bd44
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/cite-bib.opm
@@ -0,0 +1,271 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \cite {Cite, Biblioraphy <2020-03-09>} % loaded in format
+
+   \_doc -----------------------------
+   Registers used by `\cite`, `\bib` macros are declared here.
+   The \`\bibnum` counts the bibliography items from one.
+   The \`\bibmark` is used when `\nonumcitations` is set.
+   \_cod -----------------------------
+
+\_newcount\_bibnum                       % the bibitem counter
+\_newtoks\_bibmark                       % the bibmark used if \nonumcitations
+\_newcount\_lastcitenum \_lastcitenum=0  % for \shortcitations
+\_public \bibnum \bibmark ;
+
+   \_doc -----------------------------
+   \`\cite` `[<label>,<label>,...,<label>]` manages <labes> using `\_citeA`
+   and prints `[<bib-marks>]` using `\_printsavedcites`.
+   \nl
+   \`\nocite` `[<label>,<label>,...,<label>]` only manages <labels> but prints nothing.
+   \nl
+   \`\rcite` `[<label>,<label>,...,<label>]` behaves like `\cite` but prints
+    <bib-marks> without brackets.
+   \nl
+   \`\ecite` `[<label>]{<text>}` behaves like `\rcite [<label>]` but prints
+   <text> instead <bib-mark>. The <text> is hyperlinked like <bib-marks>
+   when `\cite` or `\rcite` is used.
+   The empty internal macro \`\_savedcites` will include the `<bib-marks>` list to
+   be printed. This list is set by `\_citeA` inside a group and it is used by
+   `\_printsavedcites` in the same group. Each `\cite`/`\rcite`/`\ecite`  macro
+   starts from empty list of <bib-marks> because new group is opened.
+   \_cod -----------------------------
+
+\_def\_cite[#1]{{\_citeA#1,,,[\_printsavedcites]}}
+\_def\_nocite[#1]{{\_citeA#1,,,}}
+\_def\_rcite[#1]{{\_citeA#1,,,\_printsavedcites}}
+\_def\_ecite[#1]{\_bgroup\_citeA#1,,,\_ea\_eciteB\_savedcites;}
+\_def\_eciteB#1,#2;#3{\_if?#1\_relax #3\_else \_ilink[cite:#1]{#3}\_fi\_egroup}
+\_def\_savedcites{}
+
+\_public \cite \nocite \rcite \ecite ;
+
+   \_doc -----------------------------
+   `<bib-marks>` may be numbers or a special text related to cited bib-entry.
+   It depends on \`\nonumcitations` and on used bib-style. The mapping from
+   <label> to <bib-mark> is done when `\bib` or `\usebib` is processed.
+   These macros store the information to
+   \`\_Xbib``{<label>}{<number>}{<nonumber>}` where <number> and <nonumber> are
+   two variants of <bib-mark> (numbered or text-like). This information is
+   read from `.ref` file and it is saved to macros
+   `\_bib:<label>` and `\_bibm:<number>`. First one includes number and second
+   one includes <nonumber>. The `\_lastbibnum` macro includes last number of
+   bib-entry used in the document. A designer can use it to set appropriate
+   indentation when printing the list of all bib-entries.
+   \_cod -----------------------------
+
+\_def\_Xbib#1#2#3{\_sdef{_bib:#1}{\_bibnn{#2}&}%
+   \_if^#3^\_else\_sdef{_bim:#2}{#3}\_fi\_def\_lastbibnum{#2}}
+
+   \_doc -----------------------------
+   \`\_citeA` `<label>,` processes one label from the list of labels given in the
+   parameter of `\cite`, `\nocite`, `\rcite` or `\ecite` macros. It adds the
+   <label> to global list `\_citelist` which will be used by `\usebib` (it
+   must know what <labels> are used in the document to pick-up
+   only relevant bib-entries from the database. Because we want to save
+   space and not to save the same <label> to `\_citelist` twice, we
+   distinguish four cases:
+   \begitems
+   * `<label>` was not declared by \^`\_Xbib` and it is first such <label> in the
+     document: Then `\_bib:<label>` is undefined and we save label using
+     `\_addcitlist`, write warning on the terminal and define
+     `\_bib:<label>` as empty.
+   * `<label>` was not declared by \^`\_Xbib` but it was used previously in the
+     document: Then `\_bib:<label>` is empty and we do nothing (only data to
+     `\_savedcites` are saved).
+   * `<label>` was declared by \^`\_Xbib` and it is first such <label> in the
+     document: Then `\_bin:<label>` includes `\_bibnn{<number>}&` and we
+     test this case by `\if &\_bibnn{<number>}&`. This is true when `\_bibnn{<number>}`
+     expands to empty. The <label> is saved by `\_addcitelist` and
+     `\_bib:<label>` is re-defined directly as <number>.
+   * `<label>` was declared by \^`\_Xbib` and it was used previously in the
+     document. Then we do nothing (only data to `\_savedcites` are saved.
+   \enditems
+   The `\_citeA` macro runs repeatedly over the whole list of <labels>.
+   \_cod -----------------------------
+
+\_def\_citeA #1#2,{\_if#1,\_else
+   \_if *#1\_addcitelist{*}\_ea\_skiptorelax \_fi
+   \_ifcsname _bib:#1#2\_endcsname \_else
+      \_addcitelist{#1#2}%
+      \_opwarning{\_noexpand\cite [#1#2] unknown. Try to TeX me again}\_openref
+      \_incr\_unresolvedrefs
+      \_addto\_savedcites{?,}\_def\_sortcitesA{}\_lastcitenum=0
+      \_ea\_gdef \_csname _bib:#1#2\_endcsname {}%
+      \_ea\_skiptorelax \_fi
+   \_ea\_ifx \_csname _bib:#1#2\_endcsname \_empty
+      \_addto\_savedcites{?,}\_def\_sortcitesA{}\_lastcitenum=0
+      \_ea\_skiptorelax \_fi
+   \_def\_bibnn##1{}%
+   \_if &\_csname _bib:#1#2\_endcsname
+      \_def\_bibnn##1##2{##1}%
+      \_addcitelist{#1#2}%
+      \_sxdef{_bib:#1#2}{\_csname _bib:#1#2\_endcsname}%
+   \_fi
+   \_edef\_savedcites{\_savedcites \_csname _bib:#1#2\_endcsname,}%
+   \_relax
+   \_ea\_citeA\_fi
+}
+\_def\_addcitelist#1{\_global\_addto\_citelist{\_citeI[#1]}}
+\_def\_citelist{}
+
+   \_doc -----------------------------
+   The `<bib-marks>` (in numeric or text form) are saved in \^`\_savedcites`
+   macro separated by commas.
+   The \`\_printsavedcites` prints them by normal order or sorted if
+   \`\sortcitations` is specified or condensed if \`\shordcitations` is
+   specified.\nl
+   The `\sortcitations` appends the dummy number 300000 and we suppose that normal
+   numbers of bib-entries are less than this constant.
+   This constant is removed after the sorting algorithm.
+   The \`\shortcitations` sets simply `\_lastcitenum=1`.
+   The macros for <bib-marks> printing follows (sorry, without detail
+   documentation). They are documented in `opmac-d.pdf` (but only in Czech).
+   \_cod -----------------------------
+
+\_def\_printsavedcites{\_sortcitesA
+   \_chardef\_tmpb=0 \_ea\_citeB\_savedcites,%
+   \_ifnum\_tmpb>0 \_printdashcite{\_the\_tmpb}\_fi
+}
+\_def\_sortcitesA{}
+\_def\_sortcitations{%
+  \_def\_sortcitesA{\_edef\_savedcites{300000,\_ea}\_ea\_sortcitesB\_savedcites,%
+                    \_def\_tmpa####1300000,{\_def\_savedcites{####1}}\_ea\_tmpa\_savedcites}%
+}
+\_def\_sortcitesB #1,{\_if $#1$%
+  \_else
+     \_mathchardef\_tmpa=#1
+     \_edef\_savedcites{\_ea}\_ea\_sortcitesC \_savedcites\_end
+     \_ea\_sortcitesB
+  \_fi
+}
+\_def\_sortcitesC#1,{\_ifnum\_tmpa<#1\_edef\_tmpa{\_the\_tmpa,#1}\_ea\_sortcitesD
+                   \_else\_edef\_savedcites{\_savedcites#1,}\_ea\_sortcitesC\_fi}
+\_def\_sortcitesD#1\_end{\_edef\_savedcites{\_savedcites\_tmpa,#1}}
+
+\_def\_citeB#1,{\_if$#1$\_else
+   \_if?#1\_relax??%
+      \_else
+      \_ifnum\_lastcitenum=0   % only comma separated list
+         \_printcite{#1}%
+      \_else
+         \_ifx\_citesep\_empty  % first cite item
+            \_lastcitenum=#1\_relax
+            \_printcite{#1}%
+         \_else               % next cite item
+            \_advance\_lastcitenum by1
+            \_ifnum\_lastcitenum=#1\_relax % cosecutive cite item
+               \_mathchardef\_tmpb=\_lastcitenum
+            \_else  % there is a gap between cite items
+               \_lastcitenum=#1\_relax
+               \_ifnum\_tmpb=0 % previous items were printed
+                  \_printcite{#1}%
+               \_else
+                  \_printdashcite{\_the\_tmpb}\_printcite{#1}\_chardef\_tmpb=0
+   \_fi\_fi\_fi\_fi\_fi
+   \_ea\_citeB\_fi
+}
+\_def\_shortcitations{\_lastcitenum=1 }
+
+\_def\_printcite#1{\_citesep\_ilink[cite:#1]{\_citelinkA{#1}}\_def\_citesep{,\_hskip.2em\_relax}}
+\_def\_printdashcite#1{\_ifmmode-\_else\_hbox{--}\_fi\_ilink[cite:#1]{\_citelinkA{#1}}}
+\_def\_citesep{}
+
+\_def\_nonumcitations{\_lastcitenum=0\_def\_sortcitesA{}\_def\_etalchar##1{$^{##1}$}%
+   \_def\_citelinkA##1{\_isdefined{_bim:##1}\_iftrue \_csname _bim:##1\_endcsname
+      \_else ##1\_opwarning{\_noexpand\nonumcitations + empty bibmark. Maybe bad bib-style}\_fi}%
+}
+\_def\_citelinkA{}
+
+\_public \nonumcitations \sortcitations \shortcitations ;
+
+   \_doc -----------------------------
+   The \`\bib` `[<label>] {<optional bib-mark>}` prints one bib-entry
+   without reading any database. The bib-enty follows after this command.
+   This command counts the used `\bib`s from one by `\bibnum` counter and
+   saves \^`\_Xbib``{<label>}{\_the\_bibnum}{\_the\_bibmark}` into `.ref` file
+   immediately using `\_wbib`. This is the core of creation of mapping from
+   `<labels>` to `<bib-marks>`.
+   \_cod -----------------------------
+
+\_def\_bib[#1]{\_def\_tmp{\_isnextchar={\_bibA[#1]}{\_bibmark={}\_bibB[#1]}}%
+   \_ea\_tmp\_romannumeral-`\.} % ignore optional space
+\_def\_bibA[#1]=#2{\_bibmark={#2}\_bibB[#1]}
+\_def\_bibB[#1]{\_par \_bibskip
+   \_advance\_bibnum by1
+   \_noindent \_def\_tmpb{#1}\_wbib{#1}{\_the\_bibnum}{\_the\_bibmark}%
+   \_printlabel{#1}%
+   \_printbib \_ignorespaces
+}
+\_def\_wbib#1#2#3{\_dest[cite:\_the\_bibnum]%
+   \_ifx\_wref\_wrefrelax\_else \_immediate\_wref\_Xbib{{#1}{#2}{#3}}\_fi}
+
+\_public \bib ;
+
+   \_doc -----------------------------
+   The \`\_printbib` prints the bib-entry itself. You can re-define it if you
+   want a different design. The `\_pritbib` starts in horizontal mode after
+   `\noindent` and after the eventual hyperlink destination is inserted.
+   By default, the `\_printbib` sets the indentation
+   by `\hangindent` and prints numeric <bib-marks> by
+   `\llap{[\the\bibnum]}` If `\nonumcitations` then the `\_citelinkA` is not
+   empty and <bib-marks> (`\the\bibnum` nor `\the\bibmark`) are not printed.
+   The text of bib-entry follows. User can create this text manually
+   using `\bib` command or it is generated automatically from a `.bib` database
+   by `\usebib` command.
+
+   The vertical space between bib-entries is controlled by \`\_bibskip` macro.
+   \_cod -----------------------------
+
+\_def \_printbib {\_hangindent=\_iindent
+   \_ifx\_citelinkA\_empty \_hskip\_iindent \_llap{[\_the\_bibnum] }\_fi
+}
+\_def \_bibskip {\_ifnum\_bibnum>0 \_smallskip \_fi}
+
+   \_doc -----------------------------
+   The \`\usebib` command is implemented in `usebib.opm` file which is loaded
+   when the `\usebib` command is used first.
+   The `usebib.opm` file loads the `librarian.tex` for scanning the `.bib`
+   files. See the section~\ref[usebib], where the file `usebib.opm` is
+   documented.
+   \_cod -----------------------------
+
+\_def\_usebib{\_par \_opinput {usebib.opm} \_usebib}
+\_def\usebib{\_usebib}
+
+   \_doc ------------------------------
+   \_forwardlink\`\nobibwarning` `[<list of bib-labels>]`
+   declares a list of bib labels
+   which are not fully declared in `.bib` file but we want to suppress the
+   warning about it. List of bib labels are comma-separated case sensitive
+   list without spaces.
+   \_cod ------------------------------
+
+\_def\_nobibwarnlist{,}
+\_def\_nobibwarning[#1]{\_global\_addto\_nobibwarnlist{#1,}}
+\_public \nobibwarning ;
+
+   \_doc -----------------------------
+   The macros above works if all `\cite` (or similar) commands are used
+   before the `\usebib` command is used because `\usebib` prints only such
+   bib-entries their <labels> are saved in the `\_citelist`. But if some
+   `\cite` is used after `\usebib`, then `\usebib` sets `\_addcitelist` to
+   \`\_writeXcite`, so such `\cite` saves the information to the
+   `.ref`file in the format \`\_Xcite``{<label>}`. Such information are copied
+   to `\_citelistB` during reading `.ref` file and `\usebib` concats two
+   lists of <labels> from `\_citelist` and `\_citelistB` and
+   uses this concatenated list.
+   \_cod -----------------------------
+
+\_def\_Xcite#1{\_addto\_citelistB{\_citeI[#1]}}
+\_def\_writeXcite#1{\_openref\_immediate\_wref\_Xcite{{#1}}}
+\_def\_citelistB{}
+
+\_endcode % -------------------------------------
+
+See end of the `usebib.opm` file for documentation about creating style
+files `bib-<style>.opm`.
+
+See end of the `bib-iso690.opm` file for large documentation about `.bib` files
+structure and about the usage of `iso690` bib-style.
+
diff --git a/Master/texmf-dist/tex/optex/base/colors.opm b/Master/texmf-dist/tex/optex/base/colors.opm
new file mode 100644
index 00000000000..bbda496761e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/colors.opm
@@ -0,0 +1,394 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \colordef {Colors <2020-03-18>} % loaded in format
+
+   \_doc -----------------------------
+   We declare internal boolean value \`\_iflocalcolor` ad do
+   \`\localcolor` as default.
+   \_cod -----------------------------
+
+\_newifi \_iflocalcolor \_localcolortrue
+\_protected\_def \_localcolor   {\_localcolortrue}
+\_protected\_def \_nolocalcolor {\_localcolorfalse}
+\_public \localcolor \nolocalcolor ;
+
+   \_doc -----------------------------
+   The basic colors in CMYK
+   \`\Blue` \`\Red` \`\Brown` \`\Green` \`\Yellow` \`\Cyan` \`\Magenta`
+   \`\Grey` \`\LightGrey` \`\White` and \`\Black`
+   are declared here.
+   \_cod -----------------------------
+
+\_def\Blue      {\_setcmykcolor{1 1 0 0}}
+\_def\Red       {\_setcmykcolor{0 1 1 0}}
+\_def\Brown     {\_setcmykcolor{0 0.67 0.67 0.5}}
+\_def\Green     {\_setcmykcolor{1 0 1 0}}
+\_def\Yellow    {\_setcmykcolor{0 0 1 0}}
+\_def\Cyan      {\_setcmykcolor{1 0 0 0}}
+\_def\Magenta   {\_setcmykcolor{0 1 0 0}}
+\_def\Grey      {\_setcmykcolor{0 0 0 0.5}}
+\_def\LightGrey {\_setcmykcolor{0 0 0 0.2}}
+\_def\White     {\_setgreycolor{1}}
+\_def\Black     {\_setgreycolor{0}}
+
+   \_doc -----------------------------
+   By default, the \`\setcmykcolor` \`\setrgbcolor` and \`\setgreycolor`
+   macros with `{<componetns>}` parameter
+   expand to `\_setcolor{<pdf-primitive>}` using \`\_formatcmyk`
+   or \`\_formatrgb` or \`\_formatgrey` expandable macros.
+   For example `\setrgbcolor{1 0 0}` expands to `\_setcolor{1 0 0 rg 1 0 0 RG}`.\nl
+   We set both types of colors (for lines (`K` or `RG` or `G`) and for fills
+   (`r` or `rg` or `g`) together in the <pdf-primitive> command.
+   This is the reason why the \`\_fillstroke` uses both its parameters.
+   If only fills are needed you can do `\def\_fillstroke#1#2{#1}`.
+   If only strokes are needed you can do `\def\_fillstroke#1#2{#2}`.
+   \_cod -----------------------------
+
+\_def\_setcmykcolor#1{\_setcolor{\_formatcmyk{#1}}}
+\_def\_setrgbcolor#1{\_setcolor{\_formatrgb{#1}}}
+\_def\_setgreycolor#1{\_setcolor{\_formatgrey{#1}}}
+\_def\_formatcmyk#1{\_fillstroke{#1 k}{#1 K}}
+\_def\_formatrgb#1{\_fillstroke{#1 rg}{#1 RG}}
+\_def\_formatgrey#1{\_fillstroke{#1 g}{#1 G}}
+\_def\_fillstroke#1#2{#1 #2}
+\_public \setcmykcolor \setrgbcolor \setgreycolor ;
+
+   \_doc -----------------------------
+   The \`\onlyrgb` declaration redefines \^`\_formatcmyk` in order it expands
+   to its conversion to RGB <pdf-primitive>. This conversion is done by
+   the \^`\_cmyktorgb` macro. Moreover, `\onlyrgb` re-defines three basic RGB
+   colors for RGB color space and re-declares \^`\colordef` as \^`\rgbcolordef`.
+   The \hbox{\`\onlycmyk`} macro does similar work, it re-defines \^`\_formatrgb`
+   macro. The Grey color space is unchanged and works in both main
+   settings (RGB or CMYK) without collisions.
+   \_cod -----------------------------
+
+\_def\_onlyrgb{\_def\Red{\_setrgbcolor{1 0 0}}%
+   \_def\Green{\_setrgbcolor{0 1 0}}\_def\Blue{\_setrgbcolor{0 0 1}}%
+   \_let\_colordef=\_rgbcolordef
+   \_def\_formatrgb##1{\_fillstroke{##1 rg}{##1 RG}}%
+   \_def\_formatcmyk##1{\_fillstroke{\_cmyktorgb ##1 ; rg}{\_cmyktorgb ##1 ; RG}}}
+\_def\_onlycmyk{\_def\_formatcmyk##1{\_fillstroke{##1 k}{##1 K}}%
+   \_def\_formatrgb##1{\_fillstroke{\_rgbtocmyk ##1 ; k}{\_rgbtocmyk ##1 ; K}}}
+\_public \onlyrgb \onlycmyk ;
+
+   \_doc -----------------------------
+   The \`\_setcolor` macro redefines empty `\_ensureblack` macro (used in
+   output routine for headers and footers) to `\_ensureblackA` which sets
+   Black at the start of its parameter and returns to the current color at the
+   end of its parameter.
+
+   The current color is saved into `\_currentcolor` macro and colorstack is pushed.
+   Finally, the `\_colorstackpop` is initialized by `\aftergroup` if
+   `\localcolor` is declared.
+
+   You can save the current color to your macro  by `\let\yourmacro=\_currentcolor`
+   and you can return to this color by the command `\_setcolor\yourmacro`.
+   \_cod -----------------------------
+
+\_protected\_def \_setcolor #1{\_global\_let\_ensureblack=\_ensureblackA
+   \_iflocalcolor \_edef\_currentcolor{#1}\_colorstackpush\_currentcolor
+                  \_aftergroup\_colorstackpop
+   \_else         \_xdef\_currentcolor{#1}\_colorstackset\_currentcolor \_fi
+}
+\_def\_pdfblackcolor{0 g 0 G}
+\_edef\_currentcolor{\_pdfblackcolor}
+\_def\_ensureblackA#1{\_global\_let\_openfnotestack=\_openfnotestackA
+   \_colorstackpush\_pdfblackcolor #1\_colorstackpop}
+
+   \_doc -----------------------------
+   The colorstack is initialized here and the basic macros
+   \`\_colorstackpush`, \`\_colorstackpop` and \`\_colorstackset`
+   are defined here.
+   \_cod -----------------------------
+
+\_mathchardef\_colorstackcnt=0 % Implicit stack usage
+\_def\_colorstackpush#1{\_pdfcolorstack\_colorstackcnt push{#1}}
+\_def\_colorstackpop{\_pdfcolorstack\_colorstackcnt pop}
+\_def\_colorstackset#1{\_pdfcolorstack\_colorstackcnt set{#1}}
+
+   \_doc -----------------------------
+   We need to open a special color stack for footnotes because footnotes
+   can follow on the next pages and their colors are independent of colors
+   used in the main page-body. The \`\_openfnotestack` is defined as
+   \`\_openfnotestackA` when the \^`\_setcolor` is used first.
+   The \`\_fnotestack` is initialized in in `\everyjob` because the
+   initialization is not saved to the format.
+   \_cod -----------------------------
+
+%\_mathchardef\_fnotestack=\_pdfcolorstackinit page {0 g 0 G} % must be in \everyjob
+\_def \_openfnotestackA {\_pdfcolorstack\_fnotestack current}
+
+   \_doc -----------------------------
+   We use Lua codes for RGB to CMYK or CMYK to RGB conversions and for
+   addition color components in the \^`\colordef` macro.
+   The \`\_rgbtocmyk` `<R> <G> <B> ;` expands to `<C> <M> <Y> <K>` and
+   the \`\_cmyktorgb` `<C> <M> <Y> <K> ;` expands to `<R> <G> <B>`.
+   The \`\_colorcrop`, \`\_colordefFin` and \`\_douseK` are auxiliary macros
+   used in the \^`\colordef`. The `\_colorcrop` rescales color components in order
+   to they are in $[0,1]$ interval. The `\colordefFin` expands to the values
+   accumulated in Lua code `color_C`, `color_M`, `color_Y` and `color_K`.
+   The `\_douseK` applies \^`\useK` to CMYK components.
+   \_cod -----------------------------
+
+\_def\_rgbtocmyk #1 #2 #3 ;{%
+   \_ea \_stripzeros \_detokenize \_ea{\_directlua{
+      local kr = math.max(#1,#2,#3)
+      if (kr==0) then
+         tex.print('0. 0. 0. 1 ;')
+      else
+         tex.print(string.format('\_pcent.3f \_pcent.3f \_pcent.3f \_pcent.3f ;',
+            (kr-#1)/kr, (kr-#2)/kr, (kr-#3)/kr, 1-kr))
+      end
+}}}
+\_def\_cmyktorgb #1 #2 #3 #4 ;{%
+   \_ea \_stripzeros \_detokenize \_ea{\_directlua{
+      local kr = 1-#4
+      tex.print(string.format('\_pcent.3f \_pcent.3f \_pcent.3f ;',
+         (1-#1)*kr, (1-#2)*kr, (1-#3)*kr))
+}}}
+\_def\_colorcrop{\_directlua{
+   local m=math.max(color_C, color_M, color_Y, color_K)
+   if (m>1) then
+      color_C=color_C/m  color_M=color_M/m  color_Y=color_Y/m color_K=color_K/m
+   end
+}}
+\_def\_colordefFin{\_colorcrop \_ea \_stripzeros \_detokenize \_ea{\_directlua{
+   tex.print(string.format('\_pcent.3f \_pcent.3f \_pcent.3f \_pcent.3f ;',
+      color_C, color_M, color_Y, color_K))
+}}}
+\_def\_douseK{\_colorcrop \_directlua{
+   kr=math.min(color_C, color_M, color_Y)
+   if (kr>=1) then
+      color_C=0  color_M=0  color_Y=0  color_K=1
+   else
+      color_C=(color_C-kr)/(1-kr)  color_M=(color_M-kr)/(1-kr)
+      color_Y=(color_Y-kr)/(1-kr)  color_K=math.min(color_K+kr,1)
+   end
+}}
+
+   \_doc -----------------------------
+   We have a problem with the `%.3f` directive in Lua code. It prints trailed
+   zeros: (0.300 instead desired 0.3) but we want to save PDF file space. The macro
+   \`\_stripzeros` removes these trailing zeros at the expand processor
+   level. So `\_stripzeros 0.300 0.400 0.560 ;` expands to `.3 .4 .56`.
+   \_cod -----------------------------
+
+\_def\_stripzeros #1.#2 #3{\_ifx0#1\_else#1\_fi.\_stripzeroA #2 0 :%
+    \_ifx;#3\_else \_space \_ea\_stripzeros\_ea#3\_fi}
+\_def\_stripzeroA #10 #2:{\_ifx^#2^\_stripzeroC#1:\_else \_stripzeroB#1 0 :\_fi}
+\_def\_stripzeroB #10 #2:{\_ifx^#2^\_stripzeroC#1:\_else #1\_fi}
+\_def\_stripzeroC #1 #2:{#1}
+
+   \_doc -----------------------------
+   The \`\rgbcolordef` and \`\cmykcolordef` use common macro
+   \`\_commoncolordef` with different first four parameters.
+   The `\_commoncolordef <selector><K><R><G><what-define>{<data>}` does the
+   real work. It initializes the Lua variables for summation.
+   It expands <data> in the group where color selectors have
+   special meaning, then it adjusts the resulting string by \^`\replstring`
+   and runs it. Example shows how the <data> are processed:
+   \begtt \catcode`\<=13
+   input <data>:  ".3\Blue + .6^\KhakiC \useK -\Black"
+   expanded to:  ".3 !=K 1 1 0 0 +.6^!=R .804 .776 .45 \_useK -!=G 0"
+   adjusted to:  "\_addcolor .3!=K 1 1 0 0 \_addcolor .6!^R .804 .776 .45
+                  \_useK \_addcolor -1!=G 0"
+   and this is processed.
+   \endtt
+   \`\_addcolor` `<coef.>!<mod><type>` expands to `\_addcolor:<mod><type> <coef>`
+   for example it expands to `\_addcolor:=K <coef>` followed by one or three or four
+   numbers (depending on <type>). <mod> is `=` (use as is) or `^` (use
+   complementary color). <type> is `K` for CMYK, `R` for RGB and `G` for
+   GREY color space. Uppercase <type> informs that `\cmykcolordef` is
+   processed and lowercase <type> informs that `\rgbcolordef` is processed.
+   All variants of commands `\_addcolor:<mod><type>` are defined. All of
+   them expand to `\_addcolorA <v1> <v2> <v3> <v4>` which adds the values of Lua
+   variables. The `\rgbcolordef` uses `\_addcolorA <R> <G> <B> 0` and
+   `\cmkykcolordef` uses `\_addcolorA <C> <M> <Y> <K>`. So the Lua variable
+   names are a little confusing when `\rgbcolordef` is processed.
+
+   Next, `\_commoncolordef` saves resulting values from Lua to `\_tmpb`
+   using `\_colordefFin`. If `\rgbcolordef` is processed, then we must to
+   remove the last <K> component which is in the format `.0` in such case.
+   The `\_stripK` macro does it.
+   Finally, the `<what-define>` is defined as `<selector>{<expanded _tmpb>}`,
+   for example `\_setcmykclor{1 0 .5 .3}`.
+   \_cod -----------------------------
+
+\_def\_rgbcolordef  {\_commoncolordef \_setrgbcolor  krg}
+\_def\_cmykcolordef {\_commoncolordef \_setcmykcolor KRG}
+\_def\_commoncolordef#1#2#3#4#5#6{%
+  \_begingroup
+     \_directlua{color_C=0 color_M=0 color_Y=0 color_K=0}%
+     \_def\_setcmykcolor##1{!=#2 ##1 }%
+     \_def\_setrgbcolor ##1{!=#3 ##1 }%
+     \_def\_setgreycolor##1{!=#4 ##1 }%
+     \_let\_useK=\_relax
+     \_edef\_tmpb{+#6}%
+     \_replstring\_tmpb{+ }{+}\_replstring\_tmpb{- }{-}%
+     \_replstring\_tmpb{+}{\_addcolor}\_replstring\_tmpb{-}{\_addcolor-}%
+     \_replstring\_tmpb{^!=}{!^}\_replstring\_tmpb{-!}{-1!}%
+     \_ifx K#2\_let\_useK=\_douseK \_fi
+     \_tmpb
+     \_edef\_tmpb{\_colordefFin}%
+     \_ifx k#2\_edef\_tmpb{\_ea\_stripK \_tmpb;}\_fi
+  \_ea\_endgroup
+  \_ea\_def\_ea#5\_ea{\_ea#1\_ea{\_tmpb}}%
+}
+\_def\_addcolor#1!#2#3{\_cs{addcolor:#2#3}#1}
+\_def\_addcolorA #1 #2 #3 #4 #5 {%
+   \_def\_tmpa{#1}\_ifx\_tmpa\_empty \_else \_edef\_tmpa{\_tmpa*}\_fi
+   \_directlua{color_C=math.max(color_C+\_tmpa#2,0)
+               color_M=math.max(color_M+\_tmpa#3,0)
+               color_Y=math.max(color_Y+\_tmpa#4,0)
+               color_K=math.max(color_K+\_tmpa#5,0)
+}}
+\_sdef{addcolor:=K}#1 #2 #3 #4 #5 {\_addcolorA #1 #2 #3 #4 #5 }
+\_sdef{addcolor:^K}#1 #2 #3 #4 #5 {\_addcolorA #1 (1-#2) (1-#3) (1-#4) #5 }
+\_sdef{addcolor:^G}#1 #2 {\_addcolorA #1 0 0 0 #2 }
+\_sdef{addcolor:=G}#1 #2 {\_addcolorA #1 0 0 0 (1-#2) }
+\_sdef{addcolor:=R}#1 #2 #3 #4 {%
+   \_edef\_tmpa{\_noexpand\_addcolorA #1 \_rgbtocmyk #2 #3 #4 ; }\_tmpa
+}
+\_sdef{addcolor:^R}#1 #2 #3 #4 {\_cs{addcolor:=R}#1 (1-#2) (1-#3) (1-#4) }
+
+\_sdef{addcolor:=k}#1 #2 #3 #4 #5 {%
+   \_edef\_tmpa{\_noexpand\_addcolorA #1 \_cmyktorgb #2 #3 #4 #5 ; 0 }\_tmpa
+}
+\_sdef{addcolor:^k}#1 #2 #3 #4 #5 {\_cs{addcolor:=k}#1 (1-#2) (1-#3) (1-#4) #5 }
+\_sdef{addcolor:^g}#1 #2 {\_addcolorA #1 (1-#2) (1-#2) (1-#2) 0 }
+\_sdef{addcolor:=g}#1 #2 {\_addcolorA #1 #2 #2 #2 0 }
+\_sdef{addcolor:=r}#1 #2 #3 #4 {\_addcolorA #1 #2 #3 #4 0 }
+\_sdef{addcolor:^r}#1 #2 #3 #4 {\_addcolorA #1 (1-#2) (1-#3) (1-#4) 0 }
+\_def\_stripK#1 .0;{#1}
+\_let\_colordef=\_cmykcolordef  % default \_colordef is \_cmykcolordef
+
+   \_doc -----------------------------
+   Public versions of \`\colordef` and \`\useK` macros are declared using
+   `\_def`, because the internal versions `\_colordef` and `\_useK` are
+   changed during processing.
+   \_cod -----------------------------
+
+\_def \useK{\_useK}
+\_def \colordef {\_colordef}
+\_public \cmykcolordef \rgbcolordef ;
+
+   \_doc -----------------------------
+   The \LaTeX/ file `x11nam.def` is read by \`\morecolors`. The numbers
+   0,1,2,3,4 are transformed to letters O, <none>, B, C, D in the name of the
+   color. Colors defined already are not re-defined. The empty \`\_showcolor`
+   macro should be re-defined for color catalog printing. For example:
+   \begtt
+   \def\vr{\vrule height10pt depth2pt width20pt}
+   \def\_showcolor{\hbox{\tt\_bslash\_tmpb: \csname\_tmpb\endcsname \vr}\space\space}
+   \begmulti 4 \typosize[11/14]
+   \morecolors
+   \endmulti
+   \endtt
+   \_cod -----------------------------
+
+\_def\_morecolors{%
+   \_long\_def\_tmp##1\preparecolorset##2##3##4##5{\_tmpa ##5;,,,;}
+   \_def\_tmpa##1,##2,##3,##4;{\_ifx,##1,\_else
+      \_def\_tmpb{##1}\_replstring\_tmpb{1}{}\_replstring\_tmpb{2}{B}%
+      \_replstring\_tmpb{3}{C}\_replstring\_tmpb{4}{D}\_replstring\_tmpb{0}{O}%
+      \_ifcsname \_tmpb\_endcsname \_else
+          \_sdef{\_tmpb}{\_setrgbcolor{##2 ##3 ##4}}\_showcolor\_fi
+      \_ea\_tmpa\_fi
+   }
+   \_ea\_tmp\_input x11nam.def
+}
+\_let\_showcolor=\_relax % re-define it if you want to print a color catalog
+\_public \morecolors ;
+
+\_endcode % -------------------------------------
+
+The colors have different behavior than fonts. Marks (whatsits) with color
+information are stored into PDF output and \TeX/ doesn't interpret them.
+The PDF viewer (or PDF interpreter in a printer) reads these marks
+and switches colors according to them. This
+is independent of \TeX/ group mechanism. You can declare
+`\nolocalcolor` at the beginning of the document, if you want this behavior.
+In this case, if you set a color then you must return to the black color
+using `\Black` manually.
+
+By default, \OpTeX/ sets `\localcolor`. It means that the typesetting
+returns to a previous color at the end of the current group, so you cannot
+write `\Black` explicitly. This is implemented using the `\aftergroup` feature.
+There is a limitation of this feature: when a color selector is used in a
+group of a box, which is saved by `\setbox`, then the activity or
+reconstruction of the previous color is processed at `\setbox` time, no in the
+box itself. You must correct it by double group:
+\begtt
+\setbox0=\hbox{\Red text}   % bad:  \Black is done after \setbox
+\setbox0=\hbox{{\Red text}} % good: \Black is done after group inside the box
+\endtt
+
+The implementation of colors is based on colorstack, so the current color
+can follow across more pages. It is not so obvious because PDF viewer (or PDF
+interpreter) manipulates with colors locally at each PDF page and it
+initializes each PDF page with black on white color.
+
+Macros \^`\setcmykcolor``{<C> <M> <Y> <K>}` or \^`\setrgbcolor``{<R> <G> <B>}`
+or\nl \^`\setgreycolor``{<Grey>}` should be used in color selectors or user can
+specify these macros explicitly.
+
+The color mixing processed by the \^`\colordef` is done in the subtractive color
+model CMYK. If the result has a component greater than 1 then all
+components are multiplied by a coefficient in order to the maximal component is
+equal to 1.
+
+You can move a shared amount of CMY components (i.e. their minimum) to the
+$K$ component. This saves the color tonners and the result is more true.
+This should be done by \^`\useK` command at the end of a linear combination
+used in `\colordef`. For example
+\begtt
+\colordef \myColor {.3\Green + .4\Blue \useK}
+\endtt
+The `\useK` command exactly does:
+$$
+  \displaylines{
+  k' =\min(C,M,Y), \cr \ C=(C-k')/(1-k'), \ M=(M-k')/(1-k'), \ Y=(Y-k')/(1-k'), \cr
+  K = \min(1,K+k').
+}
+$$
+
+You can use minus instead of plus in the linear combination in `\colordef`. The
+given color is substracted in such case and the negative components are
+rounded to zero immediately. For example
+\begtt
+\colordef \Color {\Brown-\Black}
+\endtt
+can be used for removing the black component from the color. You can use
+the `-\Black` trick after `\useK` command to remove grey components
+occurred during color mixing.
+
+Finally, you can use `^` immediately preceded before the macro name of the
+color. Then the complementary color is used here.
+\begtt
+\colordef\mycolor{\Grey+.6^\Blue} % the same as \colordef\mycolor{\Grey+.6\Yellow}
+\endtt
+
+The \^`\rgbcolordef` can be used to mix colors in additive color model RGB.
+If \^`\onlyrgb` is declared, then \^`\colordef` works as \^`\rgbcolordef`.
+
+If a CMYK to RGB or RGB to CMYK conversion is needed then
+the following simple formulae are used
+(ICC profiles are not supported):
+$$
+\displaylines{
+   \hbox{CMYK to RGB:}\cr
+   R = (1-C)(1-K), \ G = (1-M)(1-K), \ B = (1-Y)(1-K). \cr
+   \hbox{RGB to CMYK:}\cr
+   K'=\max(R,G,B), \ C=(K'-R)/K', \ M=(K'-G)/K', \ Y=(K'-B)/K', \ K=1-K'.
+}
+$$
+The RGB to CMYK conversion is invoked when a color is declared using `\setrgbcolor`
+and it is used in \^`\colordef` or if it is printed when \^`\onlycmyk` is declared.
+The CMYK to RGB conversion is invoked when a color is declared using \^`\setcmykcolor`
+and it is used in \^`\rgbcolordef` or if it is printed when \^`\onlyrgb` is declared.
+
+\_endinput
+
+2020-04-22 \replstring\tmpb{+ }{+}, {- }{-} added in \colordef, bug fixed
+2020-03-18 introduced
diff --git a/Master/texmf-dist/tex/optex/base/doc.opm b/Master/texmf-dist/tex/optex/base/doc.opm
new file mode 100644
index 00000000000..ce571a9e812
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/doc.opm
@@ -0,0 +1,276 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \printdoc {Macros for documentation printing <2020-04-28>}
+
+   \_doc -----------------------------
+   General decalarations.
+   \_cod -----------------------------
+
+\_fontfam[lmfonts]
+\_hyperlinks \Green \Green
+\_enlang
+\_enquotes
+
+   \_doc -----------------------------
+   Maybe, somebody needs `\seccc` or `\secccc`?
+   \_cod -----------------------------
+
+\_eoldef\seccc#1{\_medskip \_noindent{\_bf#1}\_par\_nobreak\_firstnoindent}
+\_def\secccc{\_medskip\_noindent $\_bullet$ }
+
+   \_doc -----------------------------
+   `\enddocument` can be redefined.
+   \_cod -----------------------------
+
+\_let\enddocument=\_bye
+
+   \_doc -----------------------------
+   A full page of listing causes underfull `\vbox` in output routine.
+   We need to add a small tolerance.
+   \_cod -----------------------------
+
+\_pgbottomskip=0pt plus10pt minus2pt
+
+   \_doc -----------------------------
+   The listing mode is implemented here. The \`\maxlines`
+   is maximal lines of code printed in the listing mode.
+   \_cod -----------------------------
+
+\_newcount \_maxlines   \_maxlines=100000
+\_public \maxlines ;
+
+\_eoldef\_cod#1{\_par \_wipeepar
+   \_vskip\_parskip \_medskip \_ttskip
+   \_begingroup
+   \_typosize[8/10]
+   \_let\_printverbline=\_printcodeline
+   \_ttline=\_inputlineno
+   \_setverb
+   \_ifnum\_ttline<0 \_let\_printverblinenum=\_relax \_else \_initverblinenum \_fi
+   \_adef{ }{\ }\_adef\^^I{\t}\_parindent=\_ttindent \_parskip=0pt
+   \_relax \_ttfont
+   \_endlinechar=`^^J
+   \_def\_tmpb{\_start}%
+   \_readverbline
+}
+\_def\_readverbline #1^^J{%
+   \_def\_tmpa{\_empty#1}%
+   \_let\_next=\_readverbline
+   \_ea\_isinlist\_ea\_tmpa\_ea{\_Doc}\_iftrue \_let\_next=\_processinput \_fi
+   \_ea\_isinlist\_ea\_tmpa\_ea{\_Endcode}\_iftrue \_endinput \_let\_next=\_processinput \_fi
+   \_ifx\_next\_readverbline \_addto\_tmpb{#1^^J}\_fi
+   \_next
+}
+{\_catcode`\ =13 \_gdef\_aspace{ }}\_def\_asp{\_ea\_noexpand\_aspace}
+\_edef\_Doc{\_asp\_asp\_bslash _doc}
+\_edef\_Endcode{\_noexpand\_empty\_bslash _endcode}
+
+   \_doc -----------------------------
+   The scanner of the control sequences in the listing mode.
+   \_cod -----------------------------
+
+\_def\_makecs{\_def\_tmp{}\_futurelet\_next\_makecsA}
+\_def\_makecsA{\_ifcat a\_noexpand\_next \_ea\_makecsB \_else \_ea\_makecsF \_fi}
+\_def\_makecsB#1{\_addto\_tmp{#1}\_futurelet\_next\_makecsA}
+\_def\_makecsF{\_ifx\_tmp\_empty \_csstring\\%
+       \_else \_ifcsname ,\_tmp\_endcsname \_link[cs:\_tmp]{\Blue}{\_csstring\\\_tmp}%
+       \_else \_let\_next=\_tmp \_remfirstunderscore\_next
+              \_ifx\_next\_empty \_let\_next=\_tmp \_fi
+              \_ifcsname ,\_next\_endcsname \_link[cs:\_next]{\Blue}{\_csstring\\\_tmp}%
+       \_else \_csstring\\\_tmp \_fi\_fi\_fi
+}
+\_def\_processinput{%
+   \_let\_start=\_relax
+   \_ea\_replstring\_ea\_tmpb\_ea{\_aspace^^J}{^^J}
+   \_addto\_tmpb{\_end}%
+   \_isinlist\_tmpb{\_start^^J}\_iftrue \_advance\_ttline by1\_fi
+   \_replstring\_tmpb{\_start^^J}{\_start}%
+   \_replstring\_tmpb{\_start}{}%
+   \_replstring\_tmpb{^^J\_end}{\_end}%
+   \_replstring\_tmpb{^^J\_end}{}%
+   \_replstring\_tmpb{\_end}{}%
+   \_ea\_prepareverbdata\_ea\_tmpb\_ea{\_tmpb^^J}%
+   \_replthis{\_csstring\\}{\_noexpand\_makecs}%
+   \_ea\_printverb \_tmpb\_end
+   \_par
+   \_endgroup \_ttskip
+   \_isnextchar\_par{}{\_noindent}%
+}
+\_def\_remfirstunderscore#1{\_ea\_remfirstunderscoreA#1\_relax#1}
+\_def\_remfirstunderscoreA#1#2\_relax#3{\_if _#1\_def#3{#2}\_fi}
+
+   \_doc -----------------------------
+   The lines in the listing mode have a yellow background.
+   \_cod -----------------------------
+
+\_def\Yellow{\_setcmykcolor{0.0 0.0 0.3 0.03}}
+
+\_def\_printcodeline#1{\_advance \_maxlines by-1
+   \_ifnum \_maxlines<0 \_ea \_endverbprinting \_fi
+   \_ifx\_printfilename\_relax \_penalty \_ttpenalty \_fi \_vskip-4pt
+   \_noindent\_rlap{\Yellow \_vrule height8pt depth5pt width\_hsize}%
+   \_printfilename
+   \_indent \_printverblinenum #1\par}
+
+\_def\_printfilename{\_hbox to0pt{%
+   \_hskip\_hsize\vbox to0pt{\_vss\_llap{\Brown\docfile}\_kern7.5pt}\_hss}%
+   \_let\_printfilename=\_relax
+}
+\_everytt={\_let\_printverblinenum=\_relax}
+
+\_long\_def\_endverbprinting#1\_end#2\_end{\_fi\_fi \_global\_maxlines=100000
+   \_noindent\_typosize[8/]\_dots etc. (see {\_tt\Brown\docfile})}
+
+   \_doc -----------------------------
+   `\docfile` is currently documented file.\nl
+   \`\printdoc` and \`\printdoctail` macros are defined here.
+   \_cod -----------------------------
+
+\_def\docfile{}
+\_def\_printdoc #1 {\_par \_def\docfile{#1}%
+   \_everytt={\_ttshift=-15pt \_let\_printverblinenum=\_relax}%
+   \_ea\_cod \input #1
+   \_everytt={\_let\_printverblinenum=\_relax}%
+   \_def\docfile{}%
+}
+\_def\_printdoctail #1 {\_bgroup
+   \_everytt={}\_ttline=-1 \_ea\_printdoctailA \_input #1 \_egroup}
+{\_long\_gdef\_printdoctailA#1\_endcode{}}
+
+\_public \printdoc \printdoctail ;
+
+   \_doc -----------------------------
+   You can do `\verbinuput \vitt{<filename>} (<from>-<to>) <filename>`
+   if you need analogical design like in listing mode.
+   \_cod -----------------------------
+
+\_def\_vitt#1{\_def\docfile{#1}\_ttline=-1
+   \_everytt={\_typosize[8/10]\_let\_printverbline=\_printcodeline \_medskip}}
+
+\_public \vitt ;
+
+   \_doc -----------------------------
+   The Index entries are without the trailing backslash. We must add it
+   when printing Index.
+   \_cod -----------------------------
+
+\_addto \_ignoredcharsen {_}  % \foo, \_foo is the same in the fist pass of sorting
+\_def\_printii #1#2&{%
+   \_ismacro\_lastii{#1}\_iffalse \_newiiletter{#1}{#2}\_def\_lastii{#1}\_fi
+   \_gdef\_currii{#1#2}\_the\_everyii\_noindent
+   \_hskip-\_iindent \_ignorespaces\_printiiA\bslash#1#2//}
+
+\_def\_printiipages#1&{\_let\_pgtype=\_undefined \_tmpnum=0
+   {\_rm\_printpages #1,:,\_par}}
+
+\_sdef{_tocl:1}#1#2#3{\_nofirst\_bigskip
+   \_bf\_llaptoclink{#1}{#2}\_hfill \_pgn{#3}\_tocpar\_medskip}
+
+   \_doc -----------------------------
+   The \code{<something>} will be print as <something>.
+   \_cod -----------------------------
+
+\_let\lt=<
+\_catcode`\<=13
+
+\_def<#1>{$\langle\hbox{\it#1\/}\rangle$}
+\_everyintt{\_catcode`\<=13 }
+
+   \_doc -----------------------------
+   If this macro is loaded by \^`\load` then we need to initialize
+   catcodes using the `\_afteroad` macro.
+   \_cod -----------------------------
+
+\_def\_afterload{\_catcode`\<=13 \_catcode`\`=13 }
+
+   \_doc -----------------------------
+   Main documentation points and hyperlinks to/from it.
+   Main documentation point: \code{\\`\\foo`}.
+   User-level documentation point: \code{\\^`\\foo}, first occurence only.
+   The next occurrences are only links to the main documentation point.
+   Link to user-level documentation point: \code{\\~`\\foo}.
+   If user-level documentation point follows the main documentation point
+   then use \code{\\_forwardlink\\`\\foo`}.
+   \_cod -----------------------------
+
+\_verbchar`
+
+\_def\`#1`{\_leavevmode\_edef\_tmp{\_csstring#1}\_iindex{\_tmp}%
+   \_ifcsname cs:\_tmp\_endcsname\_else \_dest[cs:\_tmp]\_fi
+   \_sxdef{cs:\_tmp}{}%
+   \_hbox{\_ifcsname cs:^\_tmp\_endcsname
+            \_link[cs:^\_tmp]{\Red}{\_tt\_csstring\\\_tmp}\_else
+            {\_tt\Red\_csstring\\\_tmp}\_fi}%
+}
+\_def\_forwardlink\`#1`{{\_slet{cs:^\_csstring#1}{relax}\`#1`}}
+
+\_def\^`#1{\_leavevmode\_edef\_tmp{\_csstring#1}\_iindex{\_tmp}%
+   \_hbox{\_ifcsname cs:^\_tmp\_endcsname \_else \_dest[cs:^\_tmp]\_sxdef{cs:^\_tmp}{}\_fi
+         \_link[cs:\_tmp]{\Blue}{\_tt\_string#1}}%
+   \_futurelet\_next\_cslinkA
+}
+\_def\_cslinkA{\_ifx\_next`\_ea\_ignoreit \_else \_ea\_ea\_ea`\_ea\_string\_fi}
+
+\_def\~`#1{\_leavevmode\_edef\_tmp{\_csstring#1}\_iindex{\_tmp}%
+   \_hbox{\_link[cs:^\_tmp]{\Blue}{\_tt\_string#1}}%
+   \_futurelet\_next\_cslinkA
+}
+
+\_endcode %-------------------------------------------
+
+\noindent
+The \^`\printdoc` `<filename><space>` and \^`\printdoctail` `<filename><space>`
+commands are defined after the file `doc.opm` is load by \^`\load`~`[doc]`.
+
+The `\printcoc` starts reading of given `<filename>` from the second line.
+The file is read in {\em the listing mode}.
+The `\prindoctail` starts reading given `<filename>` from the
+first occurrence of the `\_encode`. The file is read
+in normal mode (like `\input <filename>`).
+
+The {\em listing mode} prints the lines as a listing of a code. This mode is
+finished when first {\visiblesp`  \_doc`} occurs or first `\_endcode`
+occurs. At least two spaces must precede before such `\_doc`. On the other
+hand, the `\_encode` must be at the left edge of the line without spaces.
+If this rule is not met then the listing mode continues.
+
+If the first line or the last line of the listing mode is empty then such
+lines are not printed. The maximal number of printed lines in the listing
+mode is \^`\maxlines`. It is set to almost infinity (100000). You can set it
+to a more sensible value. Such a setting is valid only for the first following
+listing mode.
+
+When the listing mode is finished by `\_doc` then the next lines are read in the
+normal way, but the material between `\begtt` ... `\endtt` pair
+is shifted by three letters left. The reason is that the three spaces of
+indentation is recommended in the `\_doc` ... `\_cod` pair and this shifting
+is compensation for this indentation.
+
+The `\_cod` macro ignores the rest of the current line and starts the listing
+mode again.
+
+When the listing mode is finished by the `\_endcode` then the `\endinput` is
+applied, the reading of the file opened by `\printdoc` is finished.
+
+You cannot reach the end of the file (without `\_endcode`) in the listing
+mode.
+
+The listing mode creates all control sequences which are listed in the
+index as an active link to the main documentation point of such control sequence
+and prints them in blue. Another text is printed in black.
+
+The main documentation point is denoted by \code{\\`\\}`<sequence>`\code{`}
+in red, for example \code{\\`\\foo`}.
+The user documentation point is the first occurrence of
+\code{\\^`\\}`<sequence>`\code{`}, for example \code{\\^`\\foo`}.
+There can be more such markups, all of them are hyperlinks to the main
+documentation point.
+And main documentation point is a hyperlink to the user documentation point
+if this point exists. Finally, the
+\code{\\~`\\}`<sequence>`\code{`} (for example \code{\\~`\\foo`}) are
+hyperlinks to the user documentation point.
+
+\endinput
+
+2020-04-28 \levevmode in \^ macros added (bug fixed)
+2020-04-22 released
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/optex/base/f-adventor.opm b/Master/texmf-dist/tex/optex/base/f-adventor.opm
new file mode 100644
index 00000000000..df22be1130a
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-adventor.opm
@@ -0,0 +1,22 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Adventor] \Adventor {TeX Gyre Adventor based on Avantgarde Book}
+        {\caps} {\rm \bf \it \bi} {}
+        {[texgyreadventor-regular]}
+        {\_def\_fontnamegen {[texgyreadventor-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-antt.opm b/Master/texmf-dist/tex/optex/base/f-antt.opm
new file mode 100644
index 00000000000..39d3d011ea3
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-antt.opm
@@ -0,0 +1,32 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Antykwa Torunska] \Antt {Traditional Polish font family}
+      {\cond \medium \light \caps} {\rm \bf \it \bi} {Pagella}
+      {[AntykwaTorunska-Regular]}
+      {\_def\_fontnamegen {[AntykwaTorunska\_sfamxV\_sfamyV-\_currV]:script=latn;\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \caps ...... caps & small caps^^J
+ \cond ...... condensed^^J
+ \medium .... medium weight^^J
+ \light ..... light weight^^J
+ \cond ...... condensed^^J
+}}
+
+\_moddef \resetmod {\_fsetV sfamx={},sfamy={},caps={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \cond     {\_fsetV sfamx=Cond \_fvars Regular . Italic . 
+                    \_onlyif sfamy={}: {\_fvars Regular Bold Italic BoldItalic }} 
+\_moddef \medium   {\_fsetV sfamy=Med   \_fvars Regular . Italic . }
+\_moddef \light    {\_fsetV sfamy=Light \_fvars Regular . Italic . }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath{[texgyrepagella-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-baskerville.opm b/Master/texmf-dist/tex/optex/base/f-baskerville.opm
new file mode 100644
index 00000000000..4e6027d7032
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-baskerville.opm
@@ -0,0 +1,22 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Baskerville] \Baskerville {Free vaiants of classical Baskerville}
+        {\caps} {\rm \bf \it \bi} {}
+        {[BaskervilleF-Regular]}
+        {\_def \_fontnamegen {[BaskervilleF-\_currV]:script=latn;\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-bonum.opm b/Master/texmf-dist/tex/optex/base/f-bonum.opm
new file mode 100644
index 00000000000..a285021b2ed
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-bonum.opm
@@ -0,0 +1,24 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Bonum] \Bonum {TeX Gyre Bonum fonts based on Bookman}
+        {\caps} {\rm \bf \it \bi} {Bonum}
+        {[texgyrebonum-regular]}
+        {\_def\_fontnamegen {[texgyrebonum-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyrebonum-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-comicneue.opm b/Master/texmf-dist/tex/optex/base/f-comicneue.opm
new file mode 100644
index 00000000000..a7b9f8e0028
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-comicneue.opm
@@ -0,0 +1,23 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [ComicNeue] \Comicneue {Comic Neue sans serif}
+        {\angular} {\lf \li \rm \it \bf \bi} {}
+        {[ComicNeue-Regular]}
+        {\_def\_fontnamegen {[ComicNeue\_anguV-\_currV]:\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \angular ...... Angular ends of curves^^J
+Variants:^^J 
+ \lf (Light) \rm \bf \li (LightItalic) \it \bi^^J
+}}
+
+\_moddef \resetmod {\_fsetV angu={} \_fvars Regular Bold RegularItalic Bolditalic }
+\_moddef \angular  {\_fsetV angu=Angular }
+\_famvardef \lf    {\_fsetV curr=Light \_rm}
+\_famvardef \li    {\_fsetV curr=LightItalic \_rm} 
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-cursor.opm b/Master/texmf-dist/tex/optex/base/f-cursor.opm
new file mode 100644
index 00000000000..80b2a294574
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-cursor.opm
@@ -0,0 +1,22 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Cursor] \Cursor {TeX Gyre Cursor fonts based on Courier}
+        {\caps} {\rm \bf \it \bi} {}
+        {[texgyrecursor-regular]}
+        {\_def \_fontnamegen {[texgyrecursor-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-dejavu.opm b/Master/texmf-dist/tex/optex/base/f-dejavu.opm
new file mode 100644
index 00000000000..76fd90c0db0
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-dejavu.opm
@@ -0,0 +1,31 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [DejaVu] \Dejavu {Derived from the Vera fonts}
+        {\sans \mono \cond \light \caps} {\rm \bf \it \bi} {TG-DejavuMath}
+        {[DejaVuSerif]}
+        {\_def\_fontnamegen {[DejaVu\_subfamV\_typfamV\_currV]:\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \sans ...... sans serif^^J
+ \serif ..... serif (default)^^J
+ \mono ...... non-proportional, only \sans^^J
+ \light ..... extra-light, only \sans, only \rm, others (\bf\it\bi) unchanged^^J
+ \cond ...... condensed (\sans or \serif, not \mono)
+}}
+
+\_def\_BIfvars{\_fvars {} -Bold -Italic -BoldItalic }
+\_def\_BOfvars{\_fvars {} -Bold -Oblique -BoldOblique }
+\_moddef \resetmod {\_fsetV subfam=Serif,typfam={} \_BIfvars }
+\_moddef \sans     {\_fsetV subfam=Sans \_BOfvars }
+\_moddef \serif    {\_fsetV subfam=Serif,typfam={} \_BOfvars }
+\_moddef \mono     {\_fsetV subfam=Sans,typfam=Mono \_BOfvars }
+\_moddef \light    {\_fsetV subfam=Sans,typfam={} \_fvars -ExtraLight -Bold -Oblique -BoldOblique }
+\_moddef \cond     {\_fsetV typfam=Condensed }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyredejavu-math]}
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-ebgaramond.opm b/Master/texmf-dist/tex/optex/base/f-ebgaramond.opm
new file mode 100644
index 00000000000..63502c9b08a
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-ebgaramond.opm
@@ -0,0 +1,37 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [EB Garamond] \EBGaramond {Based on Garamond}
+        {\medium \semibold \caps \swash} {\rm \bf \it \bi \initials} {Garamond-Math}
+        {[EBGaramond-Regular]}
+        {\_def\_fontnamegen {[EBGaramond-\_currV]:\_capsV\_swaV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \caps ...... caps & small caps^^J
+ \swash ..... alternative capitals for \it, \bi, only non-accented letters^^J
+ \medium .... medium weight^^J
+ \semibold .. semibold weight (only \bf, \bi are changed)^^J
+Variant:^^J
+ \initials .. Initials, only letters ADFGLNOQT^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},swa={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \medium   {\_fvars Medium ExtraBold MediumItalic ExtraBoldItalic }
+\_moddef \semibold {\_fvars Regular SemiBold Italic SemiBoldItalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \swash    {\_fsetV swa=+swsh; }
+\_moddef \noswash  {\_fsetV swa={} }
+
+\_famvardef \initials {\_fvars Initials . . . \rm}
+
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[Garamond-Math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-garamondl.opm b/Master/texmf-dist/tex/optex/base/f-garamondl.opm
new file mode 100644
index 00000000000..d642aac98c7
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-garamondl.opm
@@ -0,0 +1,26 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Garamond Libre] \Garamondl {Free, derived from old style font family}
+        {\caps \swash} {\rm \bf \it \bi} {Garamond-Math}
+        {[GaramondLibre-Regular]}
+        {\_def\_fontnamegen
+        {[GaramondLibre-\_currV]:script=latn;\_capsV\_swaV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \caps ...... caps & small caps, only non-accented letters^^J
+ \swash ..... alternative capitals for \it, \bi, only non-accented letters^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},swa={} \_fvars Regular Bold Italic Bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum;-liga; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \swash    {\_fsetV swa=+swsh; }
+\_moddef \noswash  {\_fsetV swa={} }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[Garamond-Math]}
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-gfsbodoni.opm b/Master/texmf-dist/tex/optex/base/f-gfsbodoni.opm
new file mode 100644
index 00000000000..d7d3494a9d7
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-gfsbodoni.opm
@@ -0,0 +1,22 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [GFS Bodoni] \GFSBodoni {Based on Bodoni with greek letters}
+        {} {\rm \bf \it \bi} {}
+        {[GFSBodoni]}
+        {\_def\_fontnamegen{[GFSBodoni\_currV]:script=latn;\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... Caps & Small caps (only \rm)^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars {} Bold It BoldIt }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-heros.opm b/Master/texmf-dist/tex/optex/base/f-heros.opm
new file mode 100644
index 00000000000..767052cc45e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-heros.opm
@@ -0,0 +1,244 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Heros] \Heros {TeX Gyre Heros fonts based on Helvetica}
+     {\caps \cond} {\rm \bf \it \bi} {FiraMath}
+     {[texgyreheros-regular]}
+     {\_def\_fontnamegen{[texgyreheros\_condV-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \caps ...... caps & small caps^^J
+ \cond ...... condensed variants^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},cond={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \cond     {\_fsetV cond=cn }
+\_moddef \nocond   {\_fsetV cond={} }
+
+\_initfontfamily % new font family must be initialized
+
+\_ifmathloading
+   \_loadmath {[FiraMath-Regular]}
+   \_addto\_normalmath{\_loadumathfamily 5 {xitsmath-regular}{} }
+   \_addto\_boldmath  {\_loadumathfamily 5 {xitsmath-bold}{} }
+   \_addto\frak{\_fam5 }\_addto\cal{\_fam5 }
+   \_normalmath
+   \_wterm{MATH-FONT(5): "[XITSMath-Regular/Bold]" -- used for \_string\cal, \_string\frak}
+   % \bf, \bi from FiraMath:
+   \_let\_bsansvariables=\_bfvariables
+   \_let\_bsansGreek=\_bfGreek
+   \_let\_bsansgreek=\_bfgreek
+   \_let\_bsansdigits=\_bfdigits
+   \_let\_bisansvariables=\_bivariables
+   \_let\_bisansgreek=\_bigreek
+\_fi
+
+\_endcode
+
+The font family file declares the font family for selecting fonts from this
+family at the arbitrary size and with various shapes. Unicode fonts (OTF)
+are preferred. The following example declares the Heros family:
+
+\printdoc f-heros.opm
+
+If you want to write such a font family file, you need to keep the following rules.
+
+\begitems
+* Use the \^`\_famdecl` command first. It has the following syntax:
+\begtt \catcode`\<=13
+\_famdecl [<Name of family>] \<Familyselector> {<comments>}
+     {<modifiers>} {<variant selectors>} {<comments about math fonts>}
+     {<font-for-testing>}
+     {\_def\_fontnamegen{<font name or font file name generated>}}
+\endtt
+  This writes information about font family at the
+  terminal and prevents loading such file twice. Moreover, it probes
+  existence of `<font-for-testing>` in your system. If it doesn't exist, the
+  file loading is skipped with a warning on the terminal.
+  The \^`\_ifexistfam` macro returns false in this case.
+  The \^`\_fontnamegen` macro must be defined in the last parameter of the
+  \^`\_famdecl`. More about it is documented below.
+* You can use `\_wlog{\_detokenize{...` to write additional information into a log file.
+* You can declare optical sizes using \~`\_regoptsizes` if there are more font files
+  with different optical sizes (like in Latin Modern). See `f-lmfonts.opm`
+  file for more information about this special feature.
+* Declare font modifiers using \~`\moddef` if they are present. The \`\resetmod`
+  must be declared in each font family.
+* Check if all your declared modifiers do not produce any space in
+  horizontal mode. For example check: `X\caps Y`, the letters `XY` must
+  be printed without any space.
+* Optionally, declare new variants by the \^`\famvardef` macro.
+* Run `\_initfontfamily` to start the family (it is mandatory).
+* If math font should be loaded, use `\_loadmath{<math font>}`.
+\enditems
+
+{\noindent \bf The \`\_fontnamegen` macro}
+(declared in the last parameter of the \^`\_famdecl`)
+must expand (at the expand processor level only) to a file name of the loaded font (or to its font
+name) and to optional font features appended. The Font Selection
+System uses this macro at the primitive level in the following sense:
+
+\begtt \catcode`\<=13
+\font \<selector> {\_fontnamegen} \_sizespec
+\endtt
+%
+Note that the extended `\font` syntax
+`\font\<selector> {<font name>:<font features>} <size spec.>` or
+`\font\<selector> {[<font file name>]:<font features>} <size spec.>`
+is expected here.
+
+\seccc Example 1
+
+Assume an abstract font family with fonts `xx-Regular.otf`,
+`xx-Bold.otf`, `xx-Italic.otf` and `xx-BoldItalic.otf`. Then you can declare
+the \^`\resetmod` (for initializing the family) by:
+\begtt
+\_moddef\resetmod{\_fvars Regular Bold Italic BoldItalic }
+\endtt
+and define the \^`\_fontnamegen` in the last parameter of the \^`\_famdecl` by:
+\begtt
+\_famdecl ...
+    {\def\_fontnamegen{[xx-\_currV]}}
+\endtt
+The following auxiliary macros are used here:
+\begitems
+* \^`\moddef` declares the family dependent modifier. The \^`\resetmod` saves
+  initial values for the family.
+* \^`\_fvars` saves four names to the memory, they are used by the \^`\_currV` macro.
+* \^`\_currV` expands to one of the four names dependent on `\rm` or `\bf` or
+  `\it` or `\bi` variant is required.
+\enditems
+Assume that the user needs `\it` variant in this family. Then the
+`\_fontnamegen` macro expands to `[xx-\_currV]` and it expands to
+`[xx-Italic]`. The Font Selection System uses `\font {[xx-Italic]}`.
+This command loads the `xx-Italic.otf` font file.
+
+See more advanced examples are in `f-<family>.opm` files.
+
+\seccc Example 2
+
+The `f-heros.opm` is listed here. Look at it.
+When Heros family is selected and `\bf` is asked then
+`\font {[texgyreheros-bold]:+tlig;} at10pt`
+is processed.
+
+You can use any expandable macros or expandable primitives in the `\_fontnamegen`
+macro. The simple macros in our example with names `\_<word>V` are preferred. They
+expand typically to their content. The macro \^`\_fsetV` `<word>=<content>`
+(terminated by a space) is equivalent to `\def\_<word>V{<content>}` and you
+can use it in font modifiers. You can use the \^`\_fsetV` macro in more
+general form:
+
+\begtt \catcode`\<=13
+   \_fsetV <word-a>=<value-a>,<word-b>=<value-b>  ...etc. terminated by a space
+\endtt
+%
+with obvious result `\def\_<word-a>V {<value-a>}\def\_<word-b>V {<value-b>}` etc.
+
+\seccc Example 3
+
+If both font modifiers `\caps`, `\cond` were applied in Heros
+family, then `\def\_capsV{+smcp;+onum}` and `\def\_condV{cn}` were processed
+by these font modifiers. If a user needs the `\bf` variant at 11\,pt now then
+the
+
+\begtt
+  \font {[texgyreheroscn-bold]:+smcp;+onum;+tlig;} at11pt
+\endtt
+%
+is processed. We assume that a font file `texgyreheroscn-bold.otf` is present
+in your \TeX/ system.
+
+\seccc The \code{\\_onlyif} macro
+
+has the syntax \^`\_onlyif` `<word>=<value-a>,<value-b>,...<value-n>: {<what>}`. It can
+be used inside `\moddef` as simple IF statement: the `<what>` is processed only
+if `<word>` has `<value-a>` or `<value-b>` \dots or `<value-n>`. See
+`f-roboto.opm` for examples of usage of many `\_onlyif`'s.
+
+Recommendation: use the \^`\_fontfeatures` macro at the end of the `\_fontnamegen`
+macro in order to the \^`\setff`, \^`\setfontcolor`, \^`\setletterspace`
+macros can work.
+
+\seccc The \code{\\moddef} macro
+
+has the syntax \^`\moddef\<modifier>{<what to do>}`. It does more things than simple `\_def`:
+
+\begitems
+* The modifier macros are defined as `\_protected`.
+* The modifier macros are defined as family-dependent.
+* If the declared control sequence is defined already (and it is not a font
+  modifier) then it is re-defined with a warning.
+\enditems
+\noindent
+The \^`\famvardef` macro has the same features.
+
+\bigskip
+{\noindent\bf The `\<Familyselector>`}
+is defined by the \^`\_famdecl` macro as:
+\begtt \catcode`<=13
+\protected\def\<Familyselector> {%
+   \_def\_currfamily {<Familyselector>}%
+   \_def\_fontnamegen {...}% this is copied from 7-th parameter of \_famdecl
+   \resetmod
+   <run all family-dependent font modifiers used before Familyselector without warnings>
+\endtt
+
+{\noindent\bf The \^`\_initfontfamily`}\nl
+must be run after modifier's decaration.
+It runs the `\<Familyselector>` and it runs `\_rm`,
+so the first font from the new family is loaded and it is ready to use it.
+
+\seccc Name conventions
+
+Create font modifiers, new variants, and the `\<Familyselector>` only as public, i.e.
+in user namespace without `_` prefix. We assume that if a user re-defines them then he/she needs
+not them, so we have no problems. If the user's definition was done before loading
+the font family file then it is re-defined and \OpTeX/ warns about it. See the end of
+section~\ref[fontcommands].
+
+The name of `\<Familyselector>` should begin with an uppercase letter.
+
+Please, look at
+\ulink[http://petr.olsak.net/ftp/olsak/optex/op-catalog.pdf]{\OpTeX/ font catalogue}
+before you will create your font family file and use the same names for
+analogical font modifiers (like `\cond`, `\caps`, `\sans`, `\mono` etc.)\
+and for extra variant selectors (like `\lf`, `\li`, `\kf`, `\ki` etc.\ used in
+Roboto font family).
+
+If you are using the same font modifier names to analogical font shapes then
+such modifiers are kept when the family is changed. For example:
+
+\begtt
+\fontfam [Termes] \fontfam[Heros]
+\caps\cond\it Caps+Cond italic in Heros \Termes\currvar Caps italic in Termes.
+\endtt
+%
+The family selector first resets all modifiers data by
+\^`\resetmod` and then it tries to run all currently used family-dependent modifiers
+before the family switching (without warnings if such modifier is
+unavailable in the new family).
+In this example, `\Termes` does `\resetmod` followed by `\caps\cond`.
+The `\caps` is applied and `\cond` is silently ignored in Termes family.
+
+If you need to declare your private modifier (because it is used in other
+modifiers or macros, for example), use the name `\_wordM`. You can be
+sure that such a name does not influence the private namespace used by \OpTeX/.
+
+\seccc Additional notes
+
+See the font family file `f-libertine-s.opm` which is another example where no
+font files but font names are used.
+
+See the font family file `f-lmfonts.opm` or `f-poltawski.opm` where you can find the
+the example of the optical sizes declaration including documentation about
+it.
+
+If you need to create a font family file with a non-Unicode font, you can do it.
+The `\_fontnamegen` must expand to the name of TFM file in this case. But we
+don't prefer such font family files, because they are usable only with
+languages with alphabet subset to ISO-8859-1 (Unicodes are equal to letter's
+codes of such alphabets), but middle or east Europe use languages where
+such a condition is not true.
diff --git a/Master/texmf-dist/tex/optex/base/f-kerkis.opm b/Master/texmf-dist/tex/optex/base/f-kerkis.opm
new file mode 100644
index 00000000000..4bc31ead65d
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-kerkis.opm
@@ -0,0 +1,32 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Kerkis] \Kerkis {Free Bookman alternative with Greek letters}
+        {\semibold \sans \sanssemi \caps} {\rm \bf \it \bi \calli} {}
+        {[Kerkis]}
+        {\_def\_fontnamegen {[Kerkis\_currV]:script=latn;\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \semibold .. semibold weight (changed only \bf, \bi)^^J
+ \caps ...... caps & small caps (only \rm \bf, bad accents in \bf)^^J
+ \sans ...... sans serif^^J
+ \sanssemi .. semibold sans serif (only \rm, accented letters not available)^^J 
+Variant:^^J
+ \calli ..... Calligraphic (only upercase, lowercase letters equal to Italic)^^J
+}}
+
+\_moddef \resetmod {\_fvars {} -Bold -Italic -BoldItalic }
+\_moddef \semibold {\_fvars {} -SemiBold -Italic -SemiBold-Italic }
+\_moddef \caps     {\_fvars -SmallCaps.otf -BoldSmallCaps . . }
+\_moddef \sans     {\_fvars Sans Sans-Bold Sans-Italic Sans-BoldItalic }
+\_moddef \sanssemi {\_fvars Sans-SmallCaps . . . }
+
+\_famvardef \calli {\_fvars -Calligraphic . . . \rm}
+
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
diff --git a/Master/texmf-dist/tex/optex/base/f-kpfonts.opm b/Master/texmf-dist/tex/optex/base/f-kpfonts.opm
new file mode 100644
index 00000000000..c030bea8e84
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-kpfonts.opm
@@ -0,0 +1,45 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [KP Fonts] \Kpfonts {KP fonts -- Johannes Kepler project}
+        {\sans \mono \light \caps \swash} {\rm \bf \it \bi} {KpMath}
+        {[KpRoman-Regular]}
+        {\_def\_fontnamegen {[Kp\_subfamV-\_currV]:\_capsV\_swaV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \sans ...... sans serif^^J
+ \mono ...... non-proportional^^J
+ \light ..... light (\rm, \it) + semibold (\bf, \bi) variants^^J
+ \caps ...... caps & small caps^^J
+ \swash ..... alternative Q letter^^J
+}}
+
+\_def\_RBIfvars{\_fvars Regular Bold Italic BoldItalic }
+\_moddef \resetmod {\_fsetV subfam=Roman,caps={},swa={} \_RBIfvars }
+\_moddef \sans     {\_fsetV subfam=Sans \_RBIfvars }
+\_moddef \mono     {\_fsetV subfam=Mono \_RBIfvars }
+\_moddef \light    {\_fsetV subfam=Roman \_fvars Light Semibold LightItalic SemiboldItalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \swash    {\_fsetV swa=+swsh; }
+\_moddef \noswash  {\_fsetV swa={} }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[KpMath-Regular]}
+\_loadboldmath {[KpMath-Bold]} \to {[KpMath-Regular]}
+
+\_endcode
+
+The KP fonts family includes more variants of Math fonts.
+Only Regular / Bold pair is loaded as default.
+
+There are alternatives:
+
+\doloadmath \loadmath {KpMath-Light}
+\loadboldmath {[KpMath-Semibold]} \to {[KpMath-Light]}
+
+or
+
+\doloadmath \loadmath {KpMath-Sans}
+
diff --git a/Master/texmf-dist/tex/optex/base/f-libertine-s.opm b/Master/texmf-dist/tex/optex/base/f-libertine-s.opm
new file mode 100644
index 00000000000..3cdc0893129
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-libertine-s.opm
@@ -0,0 +1,50 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Linux Libertine] \Libertine {Free Linux Libertine fonts}
+        {\sans \mono \caps} {\rm \bf \it \bi \initials \displ \keybr} {}
+        {Linux Libertine O}
+        {\_def\_fontnamegen {Linux \_mainfamV\_V\_subfamV O/\_currV:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers^^J
+ \sans ...... smaller serifs^^J
+ \caps ...... caps & small caps^^J
+Special variants:^^J
+ \initials .. special initials (only uppercase letters)^^J
+ \displ ..... display variant, suitable at big sizes^^J
+ \mono ...... non-proportional^^J
+ \keybr ..... keyboard, emulates keyboard buttons^^J
+}}
+
+\_moddef \resetmod {\_fsetV mainfam=Libertine,subfam={},caps={} \_fvars {} B I BI }
+\_moddef \sans     {\_fsetV mainfam=Biolinum,subfam={} }
+\_moddef \mono     {\_fsetV mainfam=Libertine,subfam={Mono } \_fvars {} . . . }
+\_moddef \caps     {\_fsetV caps=+smcp; }
+\_moddef \nocaps   {\_fsetV caps={} }
+
+\_famvardef \initials {\_fsetV mainfam=Libertine,subfam={Initials } \_fvars {} . . . \rm}
+\_famvardef \displ    {\_fsetV mainfam=Libertine,subfam={Display } \_fvars {} . . . \rm}
+\_famvardef \keybr    {\_fsetV mainfam=Biolinum,subfam={Keyboard } \_fvars {} . . . \rm}
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+This is another example where the font names (no font files) are declared.
+Linux Libertine font is typically installed on Linux systems.
+The \_V macro generates a space. We provide following fonts:
+
+normal:  "Linux Libertine O:\_fontfeatures"   
+         "Linux Libertine O/B:\_fontfeatures" 
+         "Linux Libertine O/I:\_fontfeatures" 
+         "Linux Libertine O/BI:\_fontfeatures"
+mono  :  "Linux Libertine Mono O:\_fontfeatures"   
+sans:    "Linux Biolinum O:\_fontfeatures"    
+         "Linux Biolinum O/B:\_fontfeatures"
+         "Linux Biolinum O/I:\_fontfeatures"
+         "Linux Biolinum O/BI:\_fontfeatures"
+special: "Linux Libertine Initials O:\_fontfeatures"
+         "Linux Libertine Display O:\_fontfeatures"
+         "Linux Biolinum Keyboard O:\_fontfeatures"
+ 
+Another file f-libertine.opm declares Linux Libertine family from font files.
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/optex/base/f-libertine.opm b/Master/texmf-dist/tex/optex/base/f-libertine.opm
new file mode 100644
index 00000000000..b25c2fc4f9a
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-libertine.opm
@@ -0,0 +1,60 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Linux Libertine] \Libertine {Free Linux Libertine fonts}
+        {\sans \mono \caps \semibold} {\rm \bf \it \bi \initials \displ \keybr} {Libertinus}
+        {[LinLibertine_R]}
+        {\_def\_fontnamegen {[Lin\_subfamV _\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \sans ...... smaller serifs^^J
+ \mono ...... non-proportional^^J
+ \semibold .. semi-bold variants (changed only \bf, \bi)^^J
+ \caps ...... caps & small caps^^J%
+Special variants:^^J
+ \initials .. special initials (only uppercase letters)^^J
+ \displ ..... display variant, suitable at big sizes^^J
+ \keybr ..... keyboard, emulates keyboard buttons^^J
+}}
+
+\_moddef \resetmod {\_fsetV subfam=Libertine,caps={} \_fvars R RB RI RBI }
+\_moddef \sans     {\_fsetV subfam=Biolinum \_fvars R RB RI RBO }
+\_moddef \mono     {\_fsetV subfam=Libertine \_fvars M MB MO MBO }
+\_moddef \semibold {\_fsetV subfam=Libertine \_fvars R RZ RI RZI }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+
+\_famvardef \initials {\_fsetV subfam=Libertine \_fvars I . . . \rm}
+\_famvardef \displ    {\_fsetV subfam=Libertine \_fvars DR . . . \rm}
+\_famvardef \keybr    {\_fsetV subfam=Biolinum  \_fvars K . . . \rm}
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[LibertinusMath-Regular]}
+
+\_endcode
+
+This file declares Linux Libertine font family from font files. The
+following fonts are provided:
+
+normal:  "[LinLibertine_R]:\_fontfeatures"
+         "[LinLibertine_RB]:\_fontfeatures"
+         "[LinLibertine_RI]:\_fontfeatures"
+         "[LinLibertine_RBI  ]:\_fontfeatures"
+         "[LinLibertine_RZI]:\_fontfeatures"
+         "[LinLibertine_RZ]:\_fontfeatures"
+mono:    "[LinLibertine_M]:\_fontfeatures"  
+         "[LinLibertine_MB]:\_fontfeatures"  
+         "[LinLibertine_MO]:\_fontfeatures"  
+         "[LinLibertine_MBO]:\_fontfeatures" 
+sans:    "[LinBiolinum_RB]:\_fontfeatures" 
+         "[LinBiolinum_RBO]:\_fontfeatures" 
+         "[LinBiolinum_R]:\_fontfeatures" 
+         "[LinBiolinum_RI]:\_fontfeatures"  
+special: "[LinLibertine_I]:\_fontfeatures"   
+         "[LinLibertine_DR]:\_fontfeatures"   
+         "[LinBiolinum_K]:\_fontfeatures"
+
+See an alternative `f-libertine-s.opm` where the same font family is
+declared using font names used in operating system. 
+
diff --git a/Master/texmf-dist/tex/optex/base/f-libertinus.opm b/Master/texmf-dist/tex/optex/base/f-libertinus.opm
new file mode 100644
index 00000000000..5f1329d2864
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-libertinus.opm
@@ -0,0 +1,36 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Libertinus] \Libertinus {Free fonts derived from Linux Libertine}
+        {\semibold \sans \caps} {\rm \bf \it \bi \mono \initials \displ \keybr} {Libertinus}
+        {[LibertinusSerif-Regular]}
+        {\_def\_fontnamegen {[Libertinus\_subfamV-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \semibold .. semi-bold variants, changed only \bf, \bi^^J
+ \sans ...... smaller serifs, only \rm, \bf \it^^J
+ \caps ...... caps & small caps^^J%
+Special variants:^^J
+ \mono  ..... non-proportional
+ \initials .. special initials (only uppercase letters)^^J
+ \displ ..... display variant, suitable at big sizes^^J
+ \keybr ..... keyboard, emulates keyboard buttons^^J
+}}
+
+\_moddef \resetmod {\_fsetV subfam=Serif,caps={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \semibold {\_fsetV subfam=Serif \_fvars Regular Semibold Italic SemiboldItalic }
+\_moddef \sans     {\_fsetV subfam=Sans \_fvars Regular Bold Italic . }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+
+\_famvardef \mono     {\_fsetV subfam=Mono \_fvars Regular . . . \_rm}
+\_famvardef \initials {\_fsetV subfam=SerifInitials \_fvars Regular . . . \_rm}
+\_famvardef \displ    {\_fsetV subfam=SerifDisplay  \_fvars Regular . . . \_rm}
+\_famvardef \keybr    {\_fsetV subfam=Keyboard      \_fvars Regular . . . \_rm}
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[LibertinusMath-Regular]}
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-librecaslon.opm b/Master/texmf-dist/tex/optex/base/f-librecaslon.opm
new file mode 100644
index 00000000000..53f61834f1d
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-librecaslon.opm
@@ -0,0 +1,22 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [LibreCaslon] \Librecaslon {Libre Caslon Text, inspired by Caslon}
+        {\onum} {\rm \bf \it \bi} {Termes}
+        {[LibreCaslonText-Regular]}
+        {\_def\_fontnamegen {[Libre\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \onum ...... oldstyle figures^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},csl={CaslonText} 
+                    \_fvars \_cslV-Regular \_cslV-Bold \_cslV-Italic Csln-Bolditalic }
+\_moddef \onum     {\_fsetV caps=+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyretermes-math]}
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-lido.opm b/Master/texmf-dist/tex/optex/base/f-lido.opm
new file mode 100644
index 00000000000..13b4cb76286
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-lido.opm
@@ -0,0 +1,48 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Lido] \Lido {by StormType Foundry designed for "lidove noviny"}
+        {\cond} {\rm \bf \mf \mi \it \bi} {Termes}
+        {[LidoSTF]}
+        {\_def\_fontnamegen {[LidoSTF\_condV\_currV]:script=latn;\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Variants:^^J
+ \rm \bf \it \bi ... classical variants^^J
+ \mf \mi .... medium regular and medium italics (between normal and bold)^^J
+Modifiers:^^J
+ \cond ...... condensed (italic is not avalable for \cond variants)^^J
+ \medium .... sets \mf \bf \mi \bi family
+}}
+
+\_moddef \resetmod {\_fsetV caps={},cond={},ital=Italic \_fvars {} Bold {\_italV} {Bold\_italV} }
+\_moddef \medium   {\_fvars Medium Bold {Medium\_italV} {Bold\_italV} }
+\_moddef \cond     {\_fsetV cond=Condensed,ital={} }
+
+\_famvardef \mf    {\_fvars Medium . . . \_rm}
+\_famvardef \mi    {\_fvars . . {Medium\_italV} . \_it}
+
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyretermes-math]}
+
+\_endcode
+
+This font family Lido by Storm Type Foundry was designed for Lidove noviny
+newspaper. It is similar to Times but it is not Times.
+
+The Lido font family supports 6 standard selectors
+
+\rm Regular          \it Italics
+\mf Medium-Regular   \mi Medium-Italics
+\bf Bold-Regular     \bi Bold-Italics
+
+and three Condensed variants:
+
+\cond \rm Condensed
+      \mf Condensed-Medium
+      \bf Condensed-Bold
+
+The italic variants are missing when \cond is selected. This means that
+\cond\it does the same as \cond\rm etc.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-lmfonts.opm b/Master/texmf-dist/tex/optex/base/f-lmfonts.opm
new file mode 100644
index 00000000000..13865890e2e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-lmfonts.opm
@@ -0,0 +1,186 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Latin Modern] \LMfonts {TeX Gyre fonts based on Coputer Modern}
+        {\roman \sans \quotset \ttset \ttprop \ttlight \ttcond \upital
+         \dunhill submods:\caps \slant \nbold \bolder} {\rm \bf \it \bi \tt} {LM}
+        {[lmroman10-regular]}
+        {\_def\_fontnamegen {[\_optname{lm\_subfamV.\_currV}]:\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers (selects subfamily):^^J
+ \modreset .. implicit values (serif, bold extended, nocaps)^^J
+ \sans ...... sans serif subfamily^^J
+ \quotset ... quotation subfamily^^J
+ \ttset ..... typewriter subfamily^^J
+ \ttprop .... proportional typewriter-like subfamily^^J
+ \ttlight ... light typewriter subfamily^^J
+ \ttcond .... condensed typewriter subfamily^^J
+ \upital .... upright italic (only \rm)^^J
+ \dunhill ... dunhill roman subfamily (only \rm, \it)^^J%
+Sub-modifiers (selects special variants of given subfamily):^^J
+ \caps ...... caps & small caps (available only at limited shapes)^^J
+ \slant ..... slanted (default in some subfamilies)^^J
+ \nbold ..... normal bold (extended bold is default)^^J
+ \bolder .... extended bold^^J
+}}
+
+\_def\_LMregfont #1 #2 #3{%
+   \_edef\_tmp {\_noexpand\_regoptsizes #1 #2 \_ea\_detokenize\_ea{#3}}%
+   \_lowercase\_ea{\_tmp}% OTF file names are lowercase
+}
+\_def \_regoptFS {5 <5.5 6 <6.5 7 <7.5 8 <8.5 9 <9.5 10 <11.1 12 <15 17 <*}
+\_def \_regoptFT {5 <5.5 6 <6.5 7 <7.5 8 <8.5 9 <9.5 10 <11.1 12 <*}
+\_def \_regoptST {7 <7.5 8 <8.5 9 <9.5 10 <11.1 12 <*}
+\_def \_regoptES {8 <8.5 9 <9.5 10 <11.1 12 <15 17 <*}
+\_def \_regoptET {8 <8.5 9 <9.5 10 <11.1 12 <*}
+\_def \_regoptT  {10 <*}
+\_def \_regoptE  {8 <*}
+
+\_LMregfont lmrm.r     LMRoman?-Regular        \_regoptFS  % 5-17
+\_LMregfont lmrm.bx    LMRoman?-Bold           \_regoptFT  % 5-12
+\_LMregfont lmrm.i     LMRoman?-Italic         \_regoptST  % 7-12
+\_LMregfont lmrm.bxi   LMRoman?-BoldItalic     \_regoptT   % 10
+\_LMregfont lmrm.isl   LMRomanSlant?-Regular   \_regoptES  % 8-17
+\_LMregfont lmrm.bxisl LMRomanSlant?-Bold      \_regoptT   % 10
+\_LMregfont lmrm.b     LMRomanDemi?-Regular    \_regoptT   % 10
+\_LMregfont lmrm.bi    LMRomanDemi?-Oblique    \_regoptT   % 10
+
+\_LMregfont lmss.r     LMSans?-Regular          \_regoptES  % 8-17
+\_LMregfont lmss.bx    LMSans?-Bold             \_regoptT   % 10
+\_LMregfont lmss.i     LMSans?-Oblique          \_regoptES  % 8-17
+\_LMregfont lmss.bxi   LMSans?-BoldOblique      \_regoptT   % 10
+\_LMregfont lmss.b     LMSansDemiCond?-Regular  \_regoptT   % 10
+\_LMregfont lmss.bi    LMSansDemiCond?-Oblique  \_regoptT   % 10
+
+\_LMregfont lmsq.r     LMSansQuot?-Regular      \_regoptE  % 8
+\_LMregfont lmsq.b     LMSansQuot?-Bold         \_regoptE  % 8
+\_LMregfont lmsq.i     LMSansQuot?-Oblique      \_regoptE  % 8
+\_LMregfont lmsq.bi    LMSansQuot?-BoldOblique  \_regoptE  % 8
+
+\_LMregfont lmtt.r     LMMono?-Regular        \_regoptET  % 8-12
+\_LMregfont lmtt.b     LMMonoLt?-Bold         \_regoptT   % 10
+\_LMregfont lmtt.i     LMMono?-Italic         \_regoptT   % 10
+\_LMregfont lmtt.bi    LMMonoLt?-BoldOblique  \_regoptT   % 10
+\_LMregfont lmtt.isl   LMMonoSlant?-Regular   \_regoptT   % 10
+\_optfontalias {lmtt.bisl} {lmtt.bi}
+
+\_LMregfont lmtp.r     LMMonoPropLt?-Regular      \_regoptT  % 10
+\_LMregfont lmtp.bx    LMMonoPropLt?-Bold         \_regoptT  % 10
+\_LMregfont lmtp.i     LMMonoPropLt?-Oblique      \_regoptT  % 10
+\_LMregfont lmtp.bxi   LMMonoPropLt?-BoldOblique  \_regoptT  % 10
+\_LMregfont lmtp.b     LMMonoProp?-Regular        \_regoptT  % 10
+\_LMregfont lmtp.bi    LMMonoProp?-Oblique        \_regoptT  % 10
+
+\_LMregfont lmtl.r     LMMonoLt?-Regular  \_regoptT  % 10
+\_LMregfont lmtl.i     LMMonoLt?-Oblique  \_regoptT  % 10
+
+\_LMregfont lmtc.r     LMMonoLtCond?-Regular  \_regoptT  % 10
+\_LMregfont lmtc.i     LMMonoLtCond?-Oblique  \_regoptT  % 10
+
+\_LMregfont lmrm.rc    LMRomanCaps?-Regular \_regoptT  % 10
+\_LMregfont lmrm.ic    LMRomanCaps?-Oblique \_regoptT  % 10
+\_LMregfont lmtt.rc    LMMonoCaps?-Regular  \_regoptT  % 10
+\_LMregfont lmtt.ic    LMMonoCaps?-Oblique  \_regoptT  % 10
+
+\_LMregfont lmmu.r     LMRomanUnsl?-Regular    \_regoptT  % 10
+\_LMregfont lmdu.r     LMRomanDunh?-Regular    \_regoptT  % 10
+\_LMregfont lmdu.sl    LMRomanDunh?-Oblique    \_regoptT  % 10
+
+% main modifiers (they select a subfamily)
+\_moddef \resetmod {\_fsetV subfam=rm \_fvars r bx i bxi }
+\_moddef \sans     {\_fsetV subfam=ss \_fvars r bx i bxi }
+\_moddef \quotset  {\_fsetV subfam=sq \_fvars r b i bi }
+\_moddef \ttset    {\_fsetV subfam=tt \_fvars r b i bi }
+\_moddef \ttprop   {\_fsetV subfam=tp \_fvars r b i bi }
+\_moddef \ttlight  {\_fsetV subfam=tl \_fvars r . i . }
+\_moddef \ttcond   {\_fsetV subfam=tc \_fvars r . i . }
+\_moddef \upital   {\_fsetV subfam=mu \_fvars r . . . }
+\_moddef \dunhill  {\_fsetV subfam=du \_fvars r . sl . }
+
+% submodifiers (they select special vaiants in a subfamily)
+\_moddef \nbold    {\_onlyif subfam=rm,ss,tp: {\_fvars r b i bi }}
+\_moddef \bolder   {\_onlyif subfam=rm,ss,tp: {\_fvars r bx i bxi }}
+\_moddef \slant    {\_onlyif subfam=rm:       {\_fvars r bx isl bxisl }%
+                    \_onlyif subfam=tt:       {\_fvars r b isl bisl }}
+\_moddef \caps     {\_onlyif subfam=rm,tt:    {\_fvars rc . ic . }}
+
+\_def \_tryloadtt {\_fontdef\_tentt{\_LMfonts \_addto\_fontfeatures{-tlig;}\_ttset \_rm}}
+\_private \LMfonts \ttset ; % used in \_tryloadtt
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[latinmodern-math]}
+
+\_endcode
+
+\secc How to write the font family file with optical sizes
+
+You can use \^`\_optname` macro when `\_fontnamegen` in expanded. This macro is fully
+expandable and its input is `<internal-template>` and its output is a
+part of the font file name `<size-dependent-template>` with respect to given
+optical size.
+
+You can declare a collection of `<size-dependent-template>`s for one
+given `<internal-template>` by the \^`\_regoptsizes` macro.
+The syntax is shown for one real case:
+
+\begtt
+\_regoptsizes lmr.r lmroman?-regular
+    5 <5.5 6 <6.5 7 <7.5 8 <8.5 9 <9.5 10 <11.1 12 <15 17 <*
+\endtt
+
+In general:
+
+\begtt \catcode`\<=13
+\_regoptsizes <internal-template> <general-ouput-template> <resizing-data>
+\endtt
+
+Suppose our example above. Then `\_optname{lmr.r}` expands to
+lmroman?-regular where the question mark is substituted by a number
+depending on current `\_optsize`. If the `\_optsize` lies between two boundary
+values (they are prefixed by \code{<} character) then the number written between
+them is used. For example if $11.1 \lt `\_optsize` \le 15$ then 12 is
+substituted instead question mark. The <resizing-data> virtually begins
+with zero \code{<0}, but it is not explicitly written. The right part of
+<resizing-data> must be terminated by \code{<*} which means "less than infinity".
+
+If `\_optname` gets an argument which is not registered <internal-template>
+then it expands to `\_failedoptname` which typically ends with an error message
+about missing font. You can redefine `\_failedoptname` macro to some
+existing font if you find it useful.
+
+We are using a special macro `\_LMregfont` in `f-lmfonts.opm`.
+It sets the file names to
+lowercase and enables us to use shortcuts instead of real <resizing-data>.
+There are shortcuts `\_regoptFS`, `\_regoptT`, etc. here. The collection of
+`<internal-templates>` are declared, each of them covers a collection of real
+file names.
+
+The \^`\_optfontalias` `{<new-template>} {<internal-template>}` declares
+`<new-template>` with the same meaning as previously declared
+`<internal-template>`.
+
+The `\_optname` macro can be used even if no otical sizes are provided by
+a font family. Suppose that font file names are much more chaotic (because
+artists are very creative people), so you need to declare more systematic
+`<internal-templates>` and do an alias from each `<internal-template>` to
+`<real-font-name>`. For example, you can do it as follows:
+
+\begtt
+\def\fontalias #1 #2 {\_regoptsizes #1 ?#2 {} <*}
+%          alias name           real font name
+\fontalias crea-a-regular       {Creative Font}
+\fontalias crea-a-bold          {Creative FontBold}
+\fontalias crea-a-italic        {Creative olique}
+\fontalias crea-a-bolditalic    {Creative Bold plus italic}
+\fontalias crea-b-regular       {Creative Regular subfam}
+\fontalias crea-b-bold          {Creative subfam bold}
+\fontalias crea-b-italic        {Creative-subfam Oblique}
+\fontalias crea-b-bolditalic    {Creative Bold subfam Oblique}
+\endtt
+
+Another example of a font family with optical sizes is Antykwa Półtawskiego.
+The optical sizes feature is deactivated by default and it is switched on by
+`\osize` font modifier:
+
+\printdoc f-poltawski.opm
diff --git a/Master/texmf-dist/tex/optex/base/f-merriweather.opm b/Master/texmf-dist/tex/optex/base/f-merriweather.opm
new file mode 100644
index 00000000000..f2972aaafd9
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-merriweather.opm
@@ -0,0 +1,33 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Merriweather] \Merriweather {Modern shapes, sharp serifs}
+        {\caps \sans \serif} {\lf \li \rm \bf \it \bi \kr \ki} {}
+        {[Merriweather-Regular]}
+        {\_def\_fontnamegen {[Merriweather\_sansV-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \sans ...... sans serif^^J
+ \serif ..... variants with serifs (default)^^J
+ \caps ...... caps & small caps^^J
+ \nocaps .... no \caps^^J%
+Extended variants:^^J
+ \lf \li .... Light, LightItalic^^J
+ \kf \ki .... Black, BlackItalic^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},sans={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \sans     {\_fsetV sans=Sans }
+\_moddef \serif    {\_fsetV sans={} }
+
+\_famvardef \lf    {\_fsetV curr=Light \_rm}
+\_famvardef \li    {\_fsetV curr=LightItalic \_rm}
+\_famvardef \kf    {\_fsetV curr=ExtraBold \_onlyif sans={}: {\_fsetV curr=Black }\_rm}
+\_famvardef \ki    {\_fsetV curr=ExtraBoldItalic \_onlyif sans={}: {\_fsetV curr=BlackItalic }\_rm}
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-pagella.opm b/Master/texmf-dist/tex/optex/base/f-pagella.opm
new file mode 100644
index 00000000000..a0e4eb8e308
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-pagella.opm
@@ -0,0 +1,24 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Pagella] \Pagella {TeX Gyre Pagella fonts based on Palatino}
+        {\caps} {\rm \bf \it \bi} {Pagella}
+        {[texgyrepagella-regular]}
+        {\_def\_fontnamegen {[texgyrepagella-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyrepagella-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-poltawski.opm b/Master/texmf-dist/tex/optex/base/f-poltawski.opm
new file mode 100644
index 00000000000..ffc7e8474d8
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-poltawski.opm
@@ -0,0 +1,34 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Poltawski] \Poltawski {Antykwa Poltawskiego, Polish traditional font family}
+      {\light \noexpd \expd \eexpd \cond \ccond \osize \caps} {\rm \bf \it \bi} {}
+      {[antpolt-regular]}
+      {\_def\_fontnamegen {[antpolt\_liV\_condV-\_currV]\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \light ..... light weight, \bf,\bi=semibold^^J
+ \noexpd .... no expanded, no condensed, designed for 10pt size (default)^^J
+ \eexpd ..... expanded, designed for 6pt size^^J
+ \expd ...... semi expanded, designed for 8pt size^^J
+ \cond ...... semi condensed, designed for 12pt size^^J
+ \ccond ..... condensed, designed for 17pt size^^J
+ \osize ..... auto-sitches between \ccond \cond \noexpd \expd \eexpd by size^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV li={},cond={},caps={} \_fvars regular bold italic bolditalic }
+\_moddef \light    {\_fsetV li=lt }
+\_moddef \noexpd   {\_fsetV cond={} }
+\_moddef \eexpd    {\_fsetV cond=expd }
+\_moddef \expd     {\_fsetV cond=semiexpd }
+\_moddef \cond     {\_fsetV cond=semicond }
+\_moddef \ccond    {\_fsetV cond=cond }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+\_moddef \osize    {\_def\_fontnamegen{[antpolt\_liV\_optname{x}-\_currV]:\_capsV\_fontfeatures}%
+                    \_regoptsizes x ? expd <7 semiexpd <9 {} <11.1 semicond <15 cond <*}
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
diff --git a/Master/texmf-dist/tex/optex/base/f-roboto.opm b/Master/texmf-dist/tex/optex/base/f-roboto.opm
new file mode 100644
index 00000000000..51dfffff252
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-roboto.opm
@@ -0,0 +1,59 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Roboto] \Roboto {Geometric grotesk, thin variants included}
+        {\cond \mono \ttset \thin \light \normal \bolder \caps} 
+        {\tf \ti \lf \li \rm \it \mf \mi \bf \bi \kf \ki} {}
+        {[Roboto-Regular]}
+        {\_def\_fontnamegen {[Roboto\_subV-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers (subfamilies):^^J
+ \cond ...... Condensed variants (no Thin, Medium, Black)^^J
+ \mono ...... Monospaced variants [Mono] (no Black)^^J
+ \ttset ..... Typewriter-like variants [Slab] (no Italic, no Medium, Black)^^J%
+Modifiers (face weight):^^J
+ \thin ...... \rm, \it = Thin, \bf, \bi = Normal^^J
+ \light ..... \rm, \it = Light, \bf, \bi = Medium^^J
+ \normal .... \rm, \it = Normal, \bf, \bi = Bold^^J
+ \bolder .... \rm, \it = Medium, \bf, \bi = Black^^J%
+Modifiers (Caps):^^J
+ \caps ...... Caps & small Caps^^J
+ \nocaps .... no \caps^^J%
+Extended variants:^^J
+ \tf \ti .... Thin, ThinItalic^^J
+ \lf \li .... Light, LightItalic^^J
+ \mf \mi .... Medium, MediumItalic^^J
+ \kf \ki .... Black, BlackItalic^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={},sub={},w=n \_fvars Regular Bold Italic BoldItalic }
+\_moddef \mono     {\_fsetV sub=Mono \_onlyif w=b: {\normal}}
+\_moddef \cond     {\_fsetV sub=Condensed \_onlyif w=b: {\normal}\_onlyif w=t: {\light}}
+\_moddef \ttset    {\_fsetV sub=Slab \_fvars Regular Bold . . }
+
+\_moddef \thin     {\_onlyif sub={},Mono: {\_fsetV w=t \_fvars Thin Regular ThinItalic Italic }%
+                    \_onlyif sub=Slab: {\_fsetV w=t \_fvars Thin Regular . . }}
+\_moddef \light    {\_onlyif sub={},Mono: {\_fsetV w=l \_fvars Light Medium LightItalic MediumItalic }%
+                    \_onlyif sub=Condensed: {\_fsetV w=l \_fvars Light Regular LightItalic Italic }%
+                    \_onlyif sub=Slab: {\_fsetV w=l \_fvars Light Bold . . }}
+\_moddef \normal   {\_fsetV w=n \_fvars Regular Bold Italic BoldItalic 
+                    \_onlyif sub=Slab: {\_fvars Regular Bold . . }}
+\_moddef \bolder   {\_onlyif sub={}: {\_fsetV w=b \_fvars Medium Black MediumItalic BlackItalic }}
+
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+
+\_famvardef \tf    {\_thinM \_rm}
+\_famvardef \ti    {\_thinM \_it}
+\_famvardef \lf    {\_lightM \_rm}
+\_famvardef \li    {\_lightM \_it}
+\_famvardef \mf    {\_bolderM \_rm}
+\_famvardef \mi    {\_bolderM \_it}
+\_famvardef \kf    {\_bolderM \_bf}
+\_famvardef \ki    {\_bolderM \_bi}
+\_let\_thinM=\thin \_let\_lightM=\light \_let\_bolderM=\bolder
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/f-schola.opm b/Master/texmf-dist/tex/optex/base/f-schola.opm
new file mode 100644
index 00000000000..067a6d0ce2f
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-schola.opm
@@ -0,0 +1,24 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Schola] \Schola {TeX Gyre Schola fonts based on New Century}
+        {\caps} {\rm \bf \it \bi} {Schola}
+        {[texgyreschola-regular]}
+        {\_def\_fontnamegen {[texgyreschola-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyreschola-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-sourcepro.opm b/Master/texmf-dist/tex/optex/base/f-sourcepro.opm
new file mode 100644
index 00000000000..a8e847104e0
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-sourcepro.opm
@@ -0,0 +1,39 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Source Pro] \Sourcepro {SourceSerifPro,SourceSansPro,SourceCodePro}
+        {\serif \sans \mono \light \elight \bolder \medium \caps} {\rm \bf \it \bi} {Termes}
+        {[SourceSerifPro-Regular]}
+        {\_def\_fontnamegen {[Source\_typfV Pro-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \serif ..... Serif family (default)^^J
+ \sans ...... Sans family^^J
+ \mono ...... Code family^^J
+ \light ..... \rm=Light, \bf=Semibold^^J
+ \elight .... \rm=Extra light, \bf=Regular^^J
+ \bolder .... \rm=Semibold, \bf=Black^^J
+ \medium .... \rm=Medium, \bf=Bold (only for \mono family)^^J
+ \caps ...... caps & small caps, only for \sans (\serif: only \rm,\bf)^^J
+}}
+
+\_moddef \resetmod {\_fsetV typf=Serif,caps={} \_fvars Regular Bold RegularIt BoldIt }
+\_moddef \serif    {\_fsetV typf=Serif }
+\_moddef \sans     {\_fsetV typf=Sans }
+\_moddef \mono     {\_fsetV typf=Code }
+\_moddef \light    {\_fvars Light Semibold LightIt SemiboldIt }
+\_moddef \elight   {\_fvars ExtraLight Regular ExtraLightIt RegularIt }
+\_moddef \bolder   {\_fvars Semibold Black SemiboldIt BlackIt }
+\_moddef \medium   {\_fsetV typf=Code \_fvars Medium Bold MediumIt BoldIt }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+\_moddef \nocaps   {\_fsetV caps={} }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyretermes-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-technika.opm b/Master/texmf-dist/tex/optex/base/f-technika.opm
new file mode 100644
index 00000000000..77b894e53b2
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-technika.opm
@@ -0,0 +1,31 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Technika] \Technika {Fonts from visual style of CTU in Prague}
+        {\caps \light} {\rm \bf \it \bi \stencil} {}
+        {[Technika-Regular]}
+        {\_def\_fontnamegen {[Technika\_stencilV-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \light ..... ligher variants: \rm\bf=light \bf\bi=normal^^J
+ \book ...... semi-ligher variants: \rm\bf=book \bf\bi=bold^^J
+ \caps ...... caps & small caps^^J%
+Special variant:^^J
+ \stencil ... dashed leters (only uppercase)^^J
+}}
+
+\_moddef \resetmod {\_fsetV stencil={},caps={} \_fvars Regular Bold Italic BoldItalic }
+\_moddef \light    {\_fsetV stencil={} \_fvars Light Regular LightItalic Italic }
+\_moddef \book     {\_fsetV stencil={} \_fvars Book Bold BookItalic BoldItalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_famvardef \stencil {\_fsetV stencil=Stencil \_fvars Bold . Bold . \rm}
+
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-termes.opm b/Master/texmf-dist/tex/optex/base/f-termes.opm
new file mode 100644
index 00000000000..8cd6ee6d8ab
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-termes.opm
@@ -0,0 +1,24 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [Termes] \Termes {TeX Gyre Termes fonts based on Times}
+        {\caps} {\rm \bf \it \bi} {Termes}
+        {[texgyretermes-regular]}
+        {\_def\_fontnamegen {[texgyretermes-\_currV]:\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifier:^^J
+ \caps ...... caps & small caps^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars regular bold italic bolditalic }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_loadmath {[texgyretermes-math]}
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/f-xcharter.opm b/Master/texmf-dist/tex/optex/base/f-xcharter.opm
new file mode 100644
index 00000000000..9ad886d47f1
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/f-xcharter.opm
@@ -0,0 +1,24 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_famdecl [XCharter] \XCharter {An extension of Bitstream Charter}
+        {\caps \slant} {\rm \bf \it \bi} {}
+        {[XCharter-Roman]}
+        {\_def\_fontnamegen {[XCharter-\_currV]:script=latn;\_capsV\_fontfeatures}}
+
+\_wlog{\_detokenize{%
+Modifiers:^^J
+ \caps ...... caps & small caps^^J
+ \slant ..... slanted variants used in \it, \bi^^J
+}}
+
+\_moddef \resetmod {\_fsetV caps={} \_fvars Roman Bold Italic BoldItalic }
+\_moddef \slant    {\_fvars Roman Bold Slanted BoldSlanted }
+\_moddef \caps     {\_fsetV caps=+smcp;+onum; }
+
+\_initfontfamily % new font family must be initialized
+
+\_endcode
+
+See the file `f-heros.opm` for information about principles of such
+font-macro-files.
+
diff --git a/Master/texmf-dist/tex/optex/base/fams-ini.opm b/Master/texmf-dist/tex/optex/base/fams-ini.opm
new file mode 100644
index 00000000000..3c8ded975e6
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fams-ini.opm
@@ -0,0 +1,214 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+% Version <2020-02-28>. Loaded in format and secondly on demand by \fontfam[catalog]
+
+\_famtext {Special name for printing a catalog :}
+
+\_faminfo [Catalogue] {Catalogue of all registered font families} {fonts-catalog} {}
+\_famalias [Catalog]
+
+\_famtext {Computer Modern like family:}
+
+\_famfrom {GUST}
+\_faminfo [Latin Modern] {TeX Gyre fonts based on Coputer Modern} {f-lmfonts}
+   { -,\nbold,\sans,\sans\nbold,\slant,\ttset,\ttset\slant,\ttset\caps,%
+       \ttprop,\ttprop\bolder,\quotset: {\rm\bf\it\bi}
+       \caps: {\rm\it}
+       \ttlight,\ttcond,\dunhill: {\rm\it} \upital: {\rm} }
+\_famalias [LMfonts] \_famalias [Latin Modern Fonts] \_famalias [lm]
+
+\_famtext {TeX Gyre fonts based on Adobe 35:}
+
+\_faminfo [Termes] {TeX Gyre Termes fonts based on Times} {f-termes}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [Times]
+
+\_faminfo [Heros] {TeX Gyre Heros fonts based on Helvetica} {f-heros}
+   { -,\caps,\cond,\caps\cond: {\rm\bf\it\bi} }
+\_famalias [Helvetica]
+
+\_faminfo [Adventor] {TeX Gyre Adventor based on Avantgarde Book} {f-adventor}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [Avantgarde Book]
+
+\_faminfo [Bonum] {TeX Gyre Bonum fonts based on Bookman} {f-bonum}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [Bookman]
+
+\_faminfo [Pagella] {TeX Gyre Pagella fonts based on Palatino} {f-pagella}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [Palatino]
+
+\_faminfo [Schola] {TeX Gyre Schola fonts based on New Century} {f-schola}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [New Century]
+
+\_faminfo [Cursor] {TeX Gyre Cursor fonts based on Courier} {f-cursor}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [Courier]
+
+\_famtext {Other fonts:}
+
+\_famfrom {Philipp H. Poll}
+\_faminfo [Linux Libertine] {Free fonts typically installed on systems} {f-libertine}
+   { -: {\rm\bf\it\bi} \semibold: {\bf\bi}
+     \caps,\sans,\mono,\caps\sans: {\rm\bf\it\bi} -: {\initials\displ\keybr} }
+\_famalias [Libertine] \_famalias [LinLibertine]
+
+\_famfrom {Philipp H. Poll, Khaled Hosny}
+\_faminfo [Libertinus] {Free fonts derived from Linux Libertine} {f-libertinus}
+   { -: {\rm\bf\it\bi} \semibold: {\bf\bi} \sans: {\rm\bf\it}
+     \caps: {\rm\bf\it\bi} \caps\semibold: {\bf\bi} \caps\sans: {\rm\bf\it}
+     -: {\mono\initials\displ\keybr} }
+
+\_famfrom {Daniel Flipo}
+\_faminfo [KP fonts] {KP fonts -- Johannes Kepler project} {f-kpfonts}
+   { -,\light,\sans,\mono, \caps, \caps\light, \caps\sans,\caps\mono,\swash: {\rm\bf\it\bi} }
+\_famalias [KP]
+
+\_famfrom {DejaVu fonts team}
+\_faminfo [DejaVu] {Derived from the Vera fonts} {f-dejavu}
+   { -,\cond,\sans,\sans\cond,\mono: {\rm\bf\it\bi} \light: {\rm} }
+
+\_famfrom {Zygfryd Gardzielewski, Janusz M. Nowacki}
+\_faminfo [Antykwa Torunska] {Traditional Polish font family} {f-antt}
+   { -,\cond,\caps, \caps\cond: {\rm\bf\it\bi}
+    \medium,\cond\medium, \light, \cond\light:{\rm\it} }
+\_famalias [Antt]
+
+\_famfrom {Adam Półtawski, Janusz M. Nowacki, Bogusław Jackowski and Piotr Strzelczyk}
+\_faminfo [Poltawski] {Antykwa Poltawskiego, Polish traditional font family} {f-poltawski}
+   { \ccond,\cond,-,\expd,\eexpd,
+     \light\ccond,\light\cond,\light,\light\expd,\light\eexpd,
+     \caps: {\rm\bf\it\bi} }
+\_famalias [Antykwa Poltawskiego] \_famalias [Poltawskiego] \_famalias [APoltawskiego]
+
+\_famfrom {Michael Sharpe}
+\_faminfo [Baskerville] {Free variants of classical Baskerville} {f-baskerville}
+   { -,\caps: {\rm\bf\it\bi} }
+\_famalias [BaskervilleF]
+
+\_famfrom {Georg Duffner, Octavio Pardo}
+\_faminfo [EB Garamond] {Free variants of classical Garamond} {f-ebgaramond}
+   { -,\caps,\medium,\medium\caps,\semibold,\semibold\caps: {\rm\bf\it\bi}
+     \swash: {\it\bi} -: {\initials} }
+\_famalias [Garamond]
+
+\_famfrom {George Douros, Benjamin Miller}
+\_faminfo [Garamond Libre] {Free, derived from old style font family} {f-garamondl}
+   { -,\caps: {\rm\bf\it\bi} \swash: {\it\bi} }
+\_famalias [GaramondL]
+
+\_famfrom {Pablo Impallari, Rodrigo Fuenzalida}
+\_faminfo [LibreCaslon] {Libre Caslon Text, inspired by Caslon} {f-librecaslon}
+   { -,\onum: {\rm\bf\it\bi} }
+\_famalias [Caslon]
+
+\_famfrom {Adobe, Paul D. Hunt}
+\_faminfo [Source Pro] {Adobe SourceSerifPro, SourceSansPro, SourceCodePro} {f-sourcepro}
+   { \elight,\light,-,\bolder: {\rm\it} -,\bolder: {\bf\bi}
+     \sans\elight,\sans\light,\sans,\sans\bolder: {\rm\it} \sans,\sans\bolder: {\bf\bi}
+     \elight\caps,\light\caps,\caps,\bolder\caps: {\rm} \caps,\bolder\caps: {\bf}
+     \sans\elight\caps,\sans\light\caps,\sans\caps,\sans\bolder\caps: {\rm\it}
+     \sans\caps,\sans\bolder\caps: {\bf\bi}
+     \mono\elight,\mono\light,\mono,\mono\medium,\mono\bolder: {\rm\it} \mono,\mono\bolder: {\bf\bi}
+   }
+\_famalias [AdobeSource] \_famalias [AdobeSourcePro]
+
+\_famfrom {Uni. of the  Aegean}
+\_faminfo [Kerkis] {Free Bookman alternative with Greek letters} {f-kerkis}
+   { -,\sans: {\rm\bf\it\bi} \caps: {\rm\bf} \semibold: {\bf\bi}
+     \sanssemi: {\rm} -:{\calli}  }
+
+\_famfrom {Craig Rozynski}
+\_faminfo [ComicNeue] {Comic Neue sans serif} {f-comicneue}
+   { -,\angular: {\lf\li\rm\it\bf\bi} }
+
+\_famfrom {Eben Sorkin}
+\_faminfo [Merriweather] {Modern shapes, sharp serifs} {f-merriweather}
+   { -,\sans: {\lf\li\rm\it\bf\bi\kf\ki} \caps,\sans\caps: {\rm\it} }
+
+\_famfrom {Google, Christian Robertson}
+\_faminfo [Roboto] {Geometric grotesk, thin variants included} {f-roboto}
+   { -: {\tf\ti\lf\li\rm\it\mf\mi\bf\bi\kf\ki}
+     \cond: {\lf\li\rm\it\bf\bi}
+     \mono: {\tf\ti\lf\li\rm\it\mf\mi\bf\bi}
+     \ttset: {\tf\lf\rm\bf}
+     \caps, \caps\cond: {\rm\bf\it\bi} \caps\ttset: {\rm\bf}
+   }
+
+\_famfrom {CTU in Prague, Roman Cernohous}
+\_faminfo [Technika] {Fonts from visual style of CTU in Prague} {f-technika}
+   { -,\light,\book, \caps, \caps\book: {\rm\bf\it\bi} -:{\stencil} }
+\_famalias [CTU Technika]
+
+\_famfrom {Bitstream, Andrey V. Panov, Michael Sharpe}
+\_faminfo [XCharter] {An extension of Bitstream Charter} {f-xcharter}
+   { -,\slant,\caps,\caps\slant: {\rm\bf\it\bi} }
+
+\_famfrom {George Matthiopoulos, Greek Font Society}
+\_faminfo [GFSBodoni] {Based on Bodoni with greek letters} {f-gfsbodoni}
+   { -: {\rm\bf\it\bi} \caps: {\rm} }
+
+\_endcode
+
+Once you have prepared a font family file with the name `f-<famname>.opm` and
+\TeX/can see it in your filesystem then you can type \^`\fontfam``[<famname>]` and
+the file is read, so the information about the font family is loaded. The name
+`<famname>` must be lowercase and without spaces in the file name
+`f-<famname>.opm`. On the other hand, the `\fontfam` command is more tolerant:
+you can write uppercase letters and spaces here. The spaces are ignored and
+uppercase letters are converted to lowercase.
+For example `\fontfam [LM Fonts]` is equivalent to `\fontfam [LMfonts]` and both
+commands load the file `f-lmfonts.opm`.
+
+You can use your font file in sense of the previous paragraph without
+registering it. But problem is that such families are not listed when
+`\fontfam[?]` is used and it is not included in the font catalog when
+`\fontfam[catalog]` is printed. The list of families taken in the catalog and
+listed on the terminal is declared in two files: `fams-ini.opm` and
+`fams-local.opm`. The second file is optional. Users can create it and write to
+it the information about user-defined families using the same syntax as in
+existed file `fams-ini.opm`.
+
+The information from the user's `fams-local.opm` file has precedence.
+For example `fams-ini.opm` declares aliases Times$\to$Termes etc. If you
+have the original Times purchased from Adobe then you can register your
+declaration of Adobe's Times family in `fams-local.opm`. When a user writes
+`\fontfam[Times]` then the original Times (not Termes) is used.
+
+The `fams-ini.opm` and `fams-local.opm` files use the macros
+`\_famifo`, `\_famalias` and `\_famtext`. See the example from
+`fams-ini.tex`:
+
+{\everytt={\typosize[8/10]\_let\_printverbline=\_printcodeline \medskip}
+ \def\docfile{fams-ini.opm}
+\verbinput (3-28) fams-ini.opm
+... etc.
+}
+\medskip
+
+The \^`\_faminfo` commad has the syntax:
+\begtt \catcode`\<=13
+\_faminfo [<Family Name>] {<comments>} {<file-name>}
+     { <mod-plus-vars> }
+\endtt
+%
+The `<mod-plus-vars>` data is used only when printing the catalog. It consists of
+one or more pairs `<mods>: {<vars>}`.
+For each pair: each modifier (separated by comma) is applied to each
+variant selector in <vars>
+and prepared samples are printed. The `-` character means no modifiers
+should be applied.
+
+The \^`\_famalias` declares an alias to the last
+declared family.
+
+The \^`\_famtext` writes a line to the terminal and the log file when all
+families are listed.
+
+The \^`\_famfrom` saves the information about font type foundry or
+manufacturer or designer or license owner. You can use it before `\_faminfo`
+to print `\_famfrom` info into the catalog.
+The `\_famfrom` data is applied to each following declared families until new
+`\_famfrom` is given. Use `\_famfrom {}` if the information is not known.
diff --git a/Master/texmf-dist/tex/optex/base/fnotes.opm b/Master/texmf-dist/tex/optex/base/fnotes.opm
new file mode 100644
index 00000000000..612b32a17d7
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fnotes.opm
@@ -0,0 +1,191 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \fnote {Footnotes, marginal notes OpTeX <2020-05-26>} % loaded in format
+
+   \_doc -----------------------------
+   \`\_gfnotenum` is a counter which counts footnotes globally in the whole document.\nl
+   \`\_lfnotenum` is a counter which counts footnotes at each chapter from one.
+                  It is used for local page footnote counters too.\nl
+   \`\_ifpgfnote` says that footnote numbers are counted on each page from
+                   one. We need to run `\openref` in this case.\nl
+   \`\fnotenum` is a macro that expands to footnote number counted in declared part.\nl
+   \`\fnotenumchapters` declares footnotes numbered in each chapter from one
+   (default), \`\fnotenumglobal` declares footnotes numbered in whole
+   document from one and \`\fnotenumpages` declares footnotes numbered
+   at each page from one.
+   \_cod -----------------------------
+
+\_newcount\_gfnotenum \_gfnotenum=0
+\_newcount\_lfnotenum
+
+\_newifi \_ifpgfnote
+\_def \_fnotenumglobal   {\_def\_fnotenum{\_the\_gfnotenum}\_pgfnotefalse}
+\_def \_fnotenumchapters {\_def\_fnotenum{\_the\_lfnotenum}\_pgfnotefalse}
+\_def \_fnotenumpages    {\_def\_fnotenum{\_trycs{_fn:\_the\_gfnotenum}{?}}\_pgfnotetrue}
+\_fnotenumchapters  % default are footnotes counted from one in each chapter
+\_def \fnotenum{\_fnotenum}
+\_public \fnotenumglobal \fnotenumchapters \fnotenumpages ;
+\_let \runningfnotes = \fnotenumglobal % for backward compatibility
+
+   \_doc -----------------------------
+   The \`\_printfnotemark` prints the footnote mark. You can re-define this
+   macro if you want another design of footnotes. For example
+   \begtt
+   \fnotenumpages
+   \def \_printfnotemark {\ifcase 0\fnotenum\or
+      *\or**\or***\or$^\mathbox{†}$\or$^\mathbox{‡}$\or$^\mathbox{††}$\fi}
+   \endtt
+   This code gives footnotes* and ** and*** and$^\mathbox{†}$ etc.\
+   and it supposes that there are no more than 6 footnotes at one page.
+
+   If you want to distinguish between footnote marks in the text and in the front of
+   the footnote itself, then you can define `\_printfnotemarkA` and `\_printfnotemarkB`.
+
+   The \`\fnotelinks``<colorA><colorB>` implements the hyperlinked footnotes
+   (from text to footnote and backward).
+   \_cod -----------------------------
+
+\_def \_printfnotemark  {$^{\_fnotenum}$}   % default footnote mark
+\_def \_printfnotemarkA {\_printfnotemark}  % footnote marks used in text
+\_def \_printfnotemarkB {\_printfnotemark}  % footnote marks used in front of footnotes
+
+\_def \_fnotelinks#1#2{% <inText color> <inFootnote color>
+   \_def\_printfnotemarkA{\_link[fnt:\_the\_gfnotenum]{\_localcolor#1}{\_printfnotemark}%
+                          \_dest[fnf:\_the\_gfnotenum]}%
+   \_def\_printfnotemarkB{\_link[fnf:\_the\_gfnotenum]{\_localcolor#2}{\_printfnotemark}%
+                          \_dest[fnt:\_the\_gfnotenum]}%
+}
+\public \fnotelinks ;
+
+   \_doc ----------------------------
+   Each footnote saves the \`\_Xfnote` (without parameter) to the `.ref`
+   file (if `\openref`). We can create the mapping from `<gfnotenum>` to`<pgfnotenum>`
+   in the macro `\_fn:<fnotenum>`. Each \^`\_Xpage` macro sets the
+   `\_lfnotenum` to zero.
+   \_cod ----------------------------
+
+\_def \_Xfnote {\_incr\_lfnotenum \_incr\_gfnotenum
+   \_sxdef{_fn:\_the\_gfnotenum}{\_the\_lfnotenum}}
+
+   \_doc ----------------------------
+   The \`\fnote` `{<text>}` macro is simple, \`\fnotemark` and \^`\fnotetext`
+   does the real work.
+   \_cod ----------------------------
+
+\_def\_fnote{\_fnotemark1\_fnotetext}
+\_def\_fnotemark#1{{\_advance\_gfnotenum by#1\_advance\_lfnotenum by#1\_relax \_printfnotemarkA}}
+
+   \_doc ----------------------------
+   The \`\fnotetext` calls \^`\_opfootnote` which is equivalent to plain \TeX/
+   \^`\vfootnote`. It creates new data to Insert \^`\footins`. The only
+   difference is that we can propagate a macro parameter into the Insert group
+   before the text is printed (see section \ref[output]).
+   This propagated macro is \`\_fnset` which sets smaller fonts.
+
+   Note that \^`\vfootnote` and \^`\_opfootnote` don't read the text as a
+   parameter but during the normal horizontal mode. This is the reason why catcode
+   changes (for example in-line verbatim) can be used here.
+   \_cod ----------------------------
+
+\_def\_fnotetext{\_incr\_gfnotenum \_incr\_lfnotenum % global increment
+   \_ifpgfnote \_openref \_fi
+   \_wref \_Xfnote{}%
+   \_ifpgfnote \_ifcsname _fn:\_the\_gfnotenum \_endcsname \_else
+       \_opwarning{unknown \_noexpand\fnote mark. TeX me again}%
+       \_incr\_unresolvedrefs
+   \_fi\_fi
+   \_opfootnote\_fnset\_printfnotemarkB
+}
+\_def\_fnset{\_everypar={}\_scalemain \_typoscale[800/800]}
+
+\_public \fnote \fnotemark \fnotetext ;
+
+   \_doc -----------------------------
+   By default \`\mnote``{<text>}` are in right margin at odd pages and they are in left
+   margin at even pages. The `\mnote` macro saves its position to `.ref`
+   file as \`\_Xmnote` without parameter. We define `\_mn:<mnotenum>` as
+   `\right` or `\left` when the `.ref` file is read.
+   The `\ifnum 0`$\le$`0#2` trick returns true if `<pageno>` has a numeric type and false
+   if it is a non-numeric type (Roman numeral, for example). We prefer to use
+   `<pageno>`, but only if it has the numeric type. We use `<gpageno>` in other cases.
+   \_cod -----------------------------
+
+\_newcount\_mnotenum    \_mnotenum=0       % global counter of mnotes
+\_def \_Xmnote {\_incr\_mnotenum \_ea \_XmnoteA \_currpage}
+\_def \_XmnoteA #1#2{% #1=<gpageno> #2=<pageno>
+   \_sxdef{_mn:\_the\_mnotenum}{\_ifodd\_numtype{#2}{#1} \_right \_else \_left \_fi}}
+\_def \_numtype #1#2{\_ifnum 0<0#1 #1\_else #2\_fi}
+
+   \_doc -----------------------------
+   User can declare \`\fixmnotes``\left` or \^`\fixmnotes``\right`. It defines
+   \`\_mnotesfixed` as `\_left` or `\_right` which declares the placement
+   of all marginal notes and such declaration has a precedence.
+   \_cod -----------------------------
+
+\_def \_fixmnotes #1{\_edef\_mnotesfixed{\_cs{_\_csstring #1}}}
+\_public \fixmnotes ;
+
+   \_doc -----------------------------
+   The \`\_mnoteD``{<text>}` macro sets the position of the marginal note.
+   The outer box of marginal note has zero width and zero depth and it is appended
+   after current line using `\vadjust` primitive or it is inverted to vertical mode
+   as a box with `\vskip-\baselineskip` followed.
+   \_cod -----------------------------
+
+\_def\_mnote #1#{\_ifx^#1^\_else \_mnoteC#1\_end \_fi \_mnoteD}
+\_def\_mnoteC up#1\_end{\_mnoteskip=#1\_relax} % \mnote up<dimen> {<text>} syntax
+\_long\_def\_mnoteD#1{\_ifvmode {\_mnoteA{#1}}\_nobreak\_vskip-\_baselineskip \_else
+   \_lower\_dp\_strutbox\_hbox{}\_vadjust{\_kern-\_dp\_strutbox \_mnoteA{#1}\_kern\_dp\_strutbox}%
+   \_fi
+}
+\_public \mnote ;
+
+   \_doc -----------------------------
+   The \`\mnoteskip` is a dimen value that denotes the vertical shift of marginal
+   note from its normal position. A positive value means shift up, negative
+   down. The `\mnoteskip` register is set to zero
+   after the marginal note is printed. The new syntax `\mnote up<dimen>{<text>}`
+   is possible too, but public `\mnoteskip` is kept for backward compatibility.
+   \_cod -----------------------------
+
+\_newdimen\_mnoteskip
+\_public \mnoteskip ;
+
+   \_doc -----------------------------
+   The \`\_mnoteA` macro does the real work. The \`\_lrmnote``{<left>}{<right>}`
+   uses only first or only second parameter depending on the left or right
+   marginal note.
+   \_cod -----------------------------
+
+\_long\_def\_mnoteA #1{\_incr\_mnotenum
+   \_ifx\_mnotesfixed\_undefined
+      \_ifcsname _mn:\_the\_mnotenum \_endcsname
+          \_edef\_mnotesfixed{\_cs{_mn:\_the\_mnotenum}}%
+      \_else
+          \_opwarning{unknown \_noexpand\mnote side. TeX me again}\_openref
+          \_incr\_unresolvedrefs
+          \_def\_mnotesfixed{\_right}%
+   \_fi\_fi
+   \_hbox to0pt{\_wref\_Xmnote{}\_everypar={}%
+      \_lrmnote{\_kern-\_mnotesize \_kern-\_mnoteindent}{\_kern\_hsize \_kern\_mnoteindent}%
+      \_vbox to0pt{\_vss \_setbox0=\_vtop{\_hsize=\_mnotesize
+             \_lrmnote{\_leftskip=0pt plus 1fill \_rightskip=0pt}
+                      {\_rightskip=0pt plus 1fil \_leftskip=0pt}%
+             {\_the\_everymnote\_noindent#1\_endgraf}}%
+          \_dp0=0pt \_box0 \_kern\_mnoteskip \_global\_mnoteskip=0pt}\_hss}%
+}
+\_def \_lrmnote#1#2{\_ea\_ifx\_mnotesfixed\_left #1\_else #2\_fi}
+
+   \_doc -----------------------------
+   We don't want to process `\fnote`, `\fnotemark`, `\mnote` in TOC, headlines
+   nor outlines.
+   \_cod -----------------------------
+
+\_regmacro {\_def\fnote#1{}} {\_def\fnote#1{}} {\_def\fnote#1{}}
+\_regmacro {\_def\fnotemark#1{}} {\_def\fnotemark#1{}} {\_def\fnotemark#1{}}
+\_regmacro {\_def\mnote#1{}} {\_def\mnote#1{}} {\_def\mnote#1{}}
+
+\_endcode % -------------------------------------
+
+2020-05-26 \mnote up<dimen> implemented
+2020-03-20 released
diff --git a/Master/texmf-dist/tex/optex/base/fonts-catalog.opm b/Master/texmf-dist/tex/optex/base/fonts-catalog.opm
new file mode 100644
index 00000000000..3cd02e7b277
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fonts-catalog.opm
@@ -0,0 +1,136 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_undefined {Font catalogue <2020-02-26>} % loaded on demand by \fontfam[catalog]
+
+\_tracinglostchars=1 % only to log file
+\_initunifonts
+\_begingroup
+
+\_istoksempty\_catalogmathsample \_iftrue \_noloadmath \_fi
+\_font\_ttfixed=[LMMono10-Regular]\_relax
+\_fontlet\_smalltt=\_ttfixed at7pt
+\_suppressfontnotfounderror=1
+
+\_lowercase\_ea{\_ea\_def\_ea\_cataloglist\_ea{\_the\_catalogonly}}
+\_lowercase\_ea{\_ea\_def\_ea\_catalognolist\_ea{\_the\_catalogexclude}}
+
+\_ifx\_cataloglist\_empty \_else
+   \_addto\_cataloglist{ }
+   \_edef\_cataloglist{\_ea\_removespaces\_cataloglist{} }
+\_fi
+\_ifx\_catalognolist\_empty \_else
+   \_addto\_catalognolist{ }
+   \_edef\_catalognolist{\_ea\_removespaces\_catalognolist{} }
+\_fi
+
+\_def\_faminfo [#1]#2#3#4{%
+   \_bgroup
+       \_lowercase{\_edef\_famname{\_ea\_removespaces #1 {} }}%
+       \_edef\_act{\_noexpand\_isinlist{,\_cataloglist,}{,\_famname,}}\_act
+       \_iftrue \def\_cataloglist{}\_fi
+       \_edef\_act{\_noexpand\_isinlist{,\_catalognolist,}{,\_famname,}}\_act
+       \_iftrue \def\_cataloglist{.}\_fi
+       \_ifx\_cataloglist\_empty
+       \_ifx^#4^\_else
+          \_bigskip {\_ttfixed\_string\fontfam [#1] -- (#2)\_par}
+          \_input #3.opm
+          \_ifexistfam \_nobreak\_medskip \_dosamples #4:{}
+              \_ifx\_mathfaminfo\_empty
+              \_else \_istoksempty\_catalogmathsample
+                  \_iftrue {\_ttfixed \$Default math font\$: \_mathfaminfo \_par}
+                  \_else Default math font (\_mathfaminfo): \_the\_catalogmathsample \_par
+              \_fi\_fi
+          \_else {\_qquad\_ttfixed ... family skipped, fonts not found in your system.}
+       \_fi\_fi\_fi
+   \_egroup
+}
+\_def\_dosamples #1:#2{\_ifx^#2^\_else
+   \_def\_printvars{#2}%
+   \_ea\_dosamplesA\_romannumeral-`\.#1,,%
+   \_ea\_dosamples\_fi
+}
+\_def\_dosamplesA#1,{%
+   \_ifx^#1^\_else
+      \_ifx-#1\_def\_usemodifiers{}\_else \_def\_usemodifiers{#1}\_fi
+      \_ea \_dosamplesB \_printvars \_relax
+      \_ea \_dosamplesA \_fi
+}
+\_def\_dosamplesB#1{%
+   \_ifx\_relax#1 \_else
+      {\_ttfixed \_detokenize\_ea{\_usemodifiers}\_detokenize{#1}\_unskip:}
+      {\_usemodifiers #1\_ea\_ifx\_the\_font \_nullfont
+          \_ttfixed ... This font isn't available in your system.%
+      \_else \_the\_catalogsample \_fi }\_par
+      \_ea \_dosamplesB \_fi
+}
+
+\_def\_wlog#1{\_nobreak\_smallskip
+   \_hbox to\_hsize{\_hskip25pt
+      \_edef\_tmp{#1}\_replstring\_tmp{^^J}{\_par}%
+      \_smalltt \_noindent \_ea \string \_csname \_currfamily\_endcsname
+      \_vtop{\leftskip=1em \_baselineskip=9pt \_tmp \_par}\_hss
+      \_if\_relax\_the\_famfrom\_relax \_else from: \_the\_famfrom \_fi
+   }
+}
+
+\_def\0#1{\_ifnum#1<10 0\_fi\_the#1}
+\_footline={\_hfil\_ttfixed\_the\_pageno\_hfil}
+\_headline={\_ttfixed Font Catalogue generated by \_OpTeX/ \_hfill \_the\_year-\0\_month-\0\_day}
+\_parindent=0pt
+\_ttfixed
+
+\_input fams-ini.opm
+
+\_isfile {fams-local.opm}\_iftrue \_famfrom{}\_input fams-local.opm \_fi
+
+\_endgroup
+
+\parindent=0pt
+
+\nonum\sec Customization of the catalog
+
+
+You can redeclare the printed sample of each font by:
+
+\begtt
+\catalogsample={Hello world!}
+\endtt
+
+before \code{\\fontfam[catalog]} command is used. You can specify
+\code{\\catalogmathsample} if you want to show default math fonts too, for example
+
+\begtt
+\catalogmathsample={Gamma function is defined as
+   $$
+   \Gamma(z) = \int_0^\infty x^{z-1} e^{-x}{\rm d}x, \quad \Re(z)>0.
+   $$}
+\endtt
+%
+The \code{\\catalogmathsample} is empty by default, so math fonts are not loaded,
+only the family of default math font is listed.
+
+\bigskip
+You can restrict the families to be printed in the catalog by:
+
+\begtt
+\catalogonly={Termes, Latin Modern, Heros}
+\endtt
+
+If the \code{\\catalogonly} is empty (this is default value) then all families are
+printed but families listed in the \code{\\catalogexclude} are excluded. For example
+
+\begtt
+\catalogexclude={Latin Modern, XCharter}
+\endtt
+
+The \code{\\cataogexclude} is empty by default.
+
+\bigskip The font families printed in the catalogue must be declared by the
+\code{\\_faminfo} command in the file \code{fams-ini.opm} (declarations used
+as default for \OpTeX/) or in the file \code{fams-local.opm}. The second file
+does not exist by default but users can create it. The syntax rules are
+described in the \code{fams-ini.opm} file.
+
+
+\_endcode % -------------------------------------
+
diff --git a/Master/texmf-dist/tex/optex/base/fonts-opmac.opm b/Master/texmf-dist/tex/optex/base/fonts-opmac.opm
new file mode 100644
index 00000000000..3ae2f0c5e1c
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fonts-opmac.opm
@@ -0,0 +1,226 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \typosize {Font managing macros from OPmac <2021-03-10>} % loaded in format
+
+   \_doc -----------------------------
+   \`\typosize` `[<font-size>/<baselineskip>]` sets given parameters.
+   It sets text font size by the \^`\setfontsize` macro and math font sizes
+   by setting internal macros \^`\_sizemtext`, \^`\_sizemscript` and
+   \^`\_sizemsscript`. It uses common concept font sizes: 100\,\%,
+   70\,\% and 50\,\%.
+   The \^`\_setmainvalues` sets the parameters as main values when
+   the `\_typosize` is called first.
+   \_cod -----------------------------
+
+\_protected\_def \_typosize [#1/#2]{%
+   \_textfontsize{#1}\_mathfontsize{#1}\_setbaselineskip{#2}%
+   \_setmainvalues \_ignorespaces
+}
+\_protected\_def \_textfontsize #1{\_if$#1$\_else \_setfontsize{at#1\_ptunit}\_fi}
+
+\_def \_mathfontsize #1{\_if$#1$\_else
+    \_tmpdim=#1\_ptunit
+    \_edef\_sizemtext{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
+    \_tmpdim=0.7\_tmpdim
+    \_edef\_sizemscript{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
+    \_tmpdim=#1\_ptunit \_tmpdim=0.5\_tmpdim
+    \_edef\_sizemsscript{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
+    \_fi
+}
+\_public \typosize ;
+
+   \_doc -----------------------------
+   \`\typoscale` `[<font-factor>/<baseline-factor>]` scales
+   font size and baselineskip by given factors in respect to current values.
+   It calculates the \^`\typosize` parameters and runs the \^`\typosize`.
+   \_cod -----------------------------
+
+\_protected\_def \_typoscale [#1/#2]{%
+   \_ifx$#1$\_def\_tmp{[/}\_else
+      \_settmpdim{#1}\_optsize
+      \_edef\_tmp{[\_ea\_ignorept\_the\_tmpdim/}\_fi
+   \_ifx$#2$\_edef\_tmp{\_tmp]}\_else
+      \_settmpdim{#2}\_baselineskip
+      \_edef\_tmp{\_tmp \_ea\_ignorept\_the\_tmpdim]}\_fi
+   \_ea\_typosize\_tmp
+}
+\_def\_settmpdim#1#2{%
+   \_tmpdim=#1pt \_divide\_tmpdim by1000
+   \_tmpdim=\_ea\_ignorept \_the#2\_tmpdim
+}
+\_public \typoscale ;
+
+   \_doc -----------------------------
+   \`\_setbaselineskip` `{<baselineskip>}` sets new `\baselineskip` and
+   more values of registers which are dependent on the `<baselineskip>`
+   including the \^`\strutbox`.
+   \_cod -----------------------------
+
+\_def \_setbaselineskip #1{\_if$#1$\_else
+   \_tmpdim=#1\_ptunit
+   \_baselineskip=\_tmpdim \_relax
+   \_bigskipamount=\_tmpdim plus.33333\_tmpdim minus.33333\_tmpdim
+   \_medskipamount=.5\_tmpdim plus.16666\_tmpdim minus.16666\_tmpdim
+   \_smallskipamount=.25\_tmpdim plus.08333\_tmpdim minus.08333\_tmpdim
+   \_normalbaselineskip=\_tmpdim
+   \_jot=.25\_tmpdim
+   \_maxdepth=.33333\_tmpdim
+   \_setbox\_strutbox=\_hbox{\_vrule height.709\_tmpdim depth.291\_tmpdim width0pt}%
+   \_fi
+}
+
+   \_doc -----------------------------
+   \`\_setmainvalues` sets the current font size and `\baselineskip`
+   values to the \`\mainfosize` and \hbox{\`\mainbaselineskip`} registers
+   and loads fonts at given sizes.
+   It redefines itself as \`\_setmainvaluesL`
+   to set the main values only first. The \^`\_setmainvaluesL` does only
+   fonts loading.
+   \nl
+   \`\scalemain` returns to these values if they were set. Else they are set
+   to 10/12\,pt.
+   \nl
+   \`\mfontsrule` gives the rule how math fonts are loaded when \^`\typosize`
+   or \^`\typoscale` are used. The value of \^`\mfontsrule` can be:
+   \begitems
+   * 0: no math fonts are loaded. User must use \^`\normalmath` or \^`\boldmath` explicitly.
+   * 1: `\_normalmath` is run if \^`\typosize`/\^`\typoscale` are used
+        first or they are run at outer group level. No
+        `\everymath`/`\everydisplay` are set in this case. If
+        \^`\typosize`/\^`\typoscale` are run repeatedly in a group then `\_normalmath` is
+        run only when math formula occurs. This is done using
+        `\everymath`/`\everydisplay` and \^`\_setmathfonts`.
+        \^`\mfontsrule=1` is default.
+   * 2: `\_normalmath` is run whenever \^`\typosize`/\^`\typoscale` are used.
+        `\everymath`/`\everydisplay` registers are untouched.
+   \enditems
+   \_cod -----------------------------
+
+\_newskip   \_mainbaselineskip   \_mainbaselineskip=0pt \_relax
+\_newdimen  \_mainfosize         \_mainfosize=0pt
+\_newcount  \_mfontsrule         \_mfontsrule=1
+
+\_def\_setmainvalues {%
+   \_mainbaselineskip=\_baselineskip
+   \_mainfosize=\_optsize
+   \_topskip=\_mainfosize \_splittopskip=\_topskip
+   \_ifmmode \_else \_bf \_it \_bi \_rm \_fi % load all basic variants of the family
+   \_ifnum \_mfontsrule>0 \_normalmath \_fi  % load math fonts first
+   \_let \_setmainvalues =\_setmainvaluesL
+}
+\_def\_setmainvaluesL {\_relax \_ifmmode \_else \_rm \_fi % load text font
+   \_ifcase \_mfontsrule                                  % load math fonts
+   \_or \_ifnum\_currentgrouplevel=0 \_normalmath
+        \_else \_everymath={\_setmathfonts}\_everydisplay={\_normalmath}%
+               \_let\_runboldmath=\_relax \_fi
+   \_or \_normalmath \_fi}
+\_def\_scalemain {%
+   \_ifdim \_mainfosize=\_zo
+       \_mainfosize=10pt  \_mainbaselineskip=12pt
+       \_let \_setmainvalues=\_setmainvaluesL
+    \_fi
+   \_optsize=\_mainfosize  \_baselineskip=\_mainbaselineskip
+}
+\_public \scalemain \mainfosize \mainbaselineskip \mfontsrule ;
+
+   \_doc -----------------------------
+   Suppose following example:
+   `{\typosize[13/15] Let $M$ be a subset of $R$ and $x\in M$...}`
+   If \^`\mfontsrule=1` then \^`\typosize` does not load math fonts
+   immediatelly but at the first math formula. It is done by `\everymath`
+   register, but the contents of this register is processed inside the math
+   group. If we do `\everymath={\_normalmath}` then this complicated macro
+   will be processed three times in your example above. We want only one
+   pocessing, so we do `\everymath={`\`\_setmathfonts``}` and
+   this macro closes math mode first, loads fonts and opens math mode again.
+   \_cod -----------------------------
+
+\_def\_setmathfonts{$\_normalmath\_everymath{}\_everydisplay{}$}
+
+   \_doc -----------------------------
+   \`\thefontsize` `[<size>]` and \`\thefontscale` `[<factor>]`
+    do modification of the size of the current font. They are implemented by the
+   \^`\newcurrfontsize` macro.
+   \_cod -----------------------------
+
+\_protected\_def\_thefontsize[#1]{\_if$#1$\_else
+     \_tmpdim=#1\_ptunit
+     \_newcurrfontsize{at\_tmpdim}%
+  \_fi
+  \_ignorespaces
+}
+\_protected\_def\_thefontscale[#1]{\_ifx$#1$\_else
+     \_tmpdim=#1pt \_divide\_tmpdim by1000
+     \_tmpdim=\_ea\_ea\_ea\_ignorept \_pdffontsize\_font \_tmpdim
+     \_newcurrfontsize{at\_tmpdim}%
+  \_fi
+  \_ignorespaces
+}
+\_public \thefontsize \thefontscale ;
+
+   \_doc -----------------------------
+   \`\em` keeps the weight of the current variant and switches
+   roman $\leftrightarrow$ italic. It adds the italic correction by
+   the \`\_additcorr` and \`\_afteritcorr` macros. The second does not
+   add italic correction if the next character is dot or comma.
+   \_cod -----------------------------
+
+\_protected\_def\_em {%
+   \_ea\_ifx \_the\_font \_tenit \_additcorr \_rm  \_else
+   \_ea\_ifx \_the\_font \_tenbf \_bi\_aftergroup\_afteritcorr\_else
+   \_ea\_ifx \_the\_font \_tenbi \_additcorr \_bf  \_else
+   \_it \_aftergroup\_afteritcorr\_fi\_fi\_fi
+}
+\_def\_additcorr{\_ifdim\_lastskip>\_zo
+   \_skip0=\_lastskip \_unskip\_italcorr \_hskip\_skip0 \_else\_italcorr \_fi}
+\_def\_afteritcorr{\_futurelet\_next\_afteritcorrA}
+\_def\_afteritcorrA{\_ifx\_next.\_else\_ifx\_next,\_else \_italcorr \_fi\_fi}
+\_let\_italcorr=\/
+
+   \_doc -----------------------------
+   The \`\boldify` macro does `\let\rm\bf`, `\let\it\bi` and
+   `\let\normalmath=\boldmath`. All following text will be in bold.
+   If should be used after \^`\typosize` or \^`\typoscale` macros.\nl
+   The internal \`\_runboldmath` macro runs `\_boldmath` immediatelly
+   if no delay of the math font loading is set by \^`\_setmainvaluesL`.\nl
+   The `\rm`, `\it` in math mode must keep its original meaning.
+   \_cod -----------------------------
+
+\_protected\_def \_boldify {%
+   \_let \_setmainvalues=\_setmainvaluesL
+   \_let\it =\_bi \_let\rm =\_bf \_let\_normalmath=\_boldmath \_bf
+   \_runboldmath
+   \_ifx\_ncharrmA\_undefined \_protected\_addto\rm{\_fam0 }\_protected\_addto\it{\_fam1 }%
+   \_else \_protected\_def\rm {\_tryloadbf \_tenbf \_inmath{\_rmvariables \_rmdigits}}%
+          \_protected\_def\it {\_tryloadbi \_tenbi \_inmath{\_itvariables}}%
+   \_fi
+}
+\_def\_runboldmath{\_boldmath}
+
+\_public \em \boldify ;
+
+   \_doc -----------------------------
+   We need to use a font selector for default pagination. Because we don't
+   know what default font size will be selected by the user, we use this
+   \`\_rmfixed` macro. It sets the `\rm` font from the default font size
+   (declared by first \^`\typosize` command and redefines itself be only
+   the font switch for the next pages.
+   \_cod -----------------------------
+
+\_def \_rmfixed {% used in default \footline
+   {\_ifdim\_mainfosize=0pt \_mainfosize=10pt \_fi
+    \_fontdef\_tenrm{\_setfontsize{at\mainfosize}\_resetmod\_rm}%
+    \_global\_let\_rmfixed=\_tenrm}% next use will be font switch only
+   \_rmfixed
+}
+\_let \rmfixed = \_tenrm % user can redefine it
+
+\_endcode % -------------------------------------
+
+History:
+2021-03-10 \boldify corrected
+2021-03-09 \mfontsrule and \_setmathfonts introduced
+2020-12-12 \_rmfixed fixed
+2020-04-28 \boldify: removed \let\_rm=\_bf
+2020-04-14 \_setmainvaluesL: \_ifmmode test added
+2020-03-27 \_setmainvalues: \_splittopskip=\_topskip added
diff --git a/Master/texmf-dist/tex/optex/base/fonts-preload.opm b/Master/texmf-dist/tex/optex/base/fonts-preload.opm
new file mode 100644
index 00000000000..712730436c9
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fonts-preload.opm
@@ -0,0 +1,36 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \tenrm {Latin Modern fonts (EC) preloaded <2020-01-23>} % loaded in format
+
+% Only few text fonts are preloaded:
+
+\_font\_tenrm=ec-lmr10   % roman text
+\_font\_tenbf=ec-lmbx10  % boldface extended
+\_font\_tenit=ec-lmri10  % text italic
+\_font\_tenbi=ec-lmbxi10 % bold italic
+\_font\_tentt=ec-lmtt10  % typewriter
+\_tenrm
+
+\_public \tenrm \tenbf \tenit \tenbi \tentt ;
+
+\_endcode %---------------------------------------------------
+
+The format in lua\TeX/ can download only non-Unicode fonts. Latin Modern EC is
+loaded here. These fonts are totally unusable in LuaTeX when languages with out
+of ASCII or ISO-8859-1 alphabets are used (for example Czech). We load only
+a few 8bit fonts here especially for simple testing the format.
+But, if the user needs to do more serious work, he/she can
+use `\fontfam` macro to load a selected font family of Unicode fonts.
+
+We have a dilemma: when the Unicode fonts cannot be preloaded in the format then the basic
+font set can be loaded by `\everyjob`. But why to load a set of fonts at the
+beginning of every job when it is highly likely that the user will
+load something completely different. Our decision is: there is a basic 8bit
+font set in the format (for testing purposes only) and the user should load
+a Unicode font family at beginning of the document.
+
+The fonts selectors \`\tenrm`, \`\tenbf`, \`\tenit`, \`\tenbi`, \`\tentt`
+are declared as `\public` here but only for backward compatibility. We don't
+use them in the Font Selection System. But the protected versions of these
+control sequences are used in the Font Selection System.
+
diff --git a/Master/texmf-dist/tex/optex/base/fonts-resize.opm b/Master/texmf-dist/tex/optex/base/fonts-resize.opm
new file mode 100644
index 00000000000..ac0064df105
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fonts-resize.opm
@@ -0,0 +1,354 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \setfontsize {Font resizing macros <2020-04-17>} % preloaded in format
+
+   \_doc -----------------------------
+   The \`\setfontsize` `{<sizespec>}` saves the `<sizespec>` to the \`\_sizespec` macro.
+   The \`\_optsize` value is calculated from the `<sizespec>`.
+   If the `<sizepec>` is in the `mag<number>` format then the contents of
+   the `\_sizespec` macro is re-calculated to the `at<dimen>` format using
+   previous `\_optsize` value.
+   \par \goodbreak
+   \_cod -----------------------------
+
+\_newdimen \_optsize         \_optsize=10pt
+\_newdimen \_defaultoptsize  \_defaultoptsize=10pt
+\_newdimen\_lastmagsize
+
+\_def\_setfontsize #1{%
+   \_edef\_sizespec{#1}%
+   \_ea \_setoptsize \_sizespec\_relax
+   \_reloading
+}
+\_def\_setoptsize {\_isnextchar a{\_setoptsizeA}
+                                 {\_isnextchar m{\_setoptsizeC}{\_setoptsizeB}}}
+\_def\_setoptsizeA at#1\_relax{\_optsize=#1\_relax\_lastmagsize=\_optsize}   % at<dimen>
+\_def\_setoptsizeB scaled#1\_relax{\_optsize=\_defaultoptsize\_relax} % scaled<scalenum>
+\_def\_setoptsizeC mag#1\_relax{%
+   \_ifdim\_lastmagsize>\_zo \_optsize=\_lastmagsize \_else \_optsize=\_pdffontsize\_font \_fi
+   \_optsize=#1\_optsize
+   \_lastmagsize=\_optsize
+   \_edef\_sizespec{at\_the\_optsize}%
+}
+\_public \setfontsize \defaultoptsize ;
+
+   \_doc -----------------------------
+   \`\_resizefont` `{<variant-name>}\<font switch>`,
+   for example `\resizefont{bf}\_tenbf` resizes the font given by the
+   variant. The variant `XX` have its font switch `\_tenXX`.
+   The \`\_doresizefont``\fontswitch` is used. It works in
+   TFM mode (\`\_doresizetfmfont`) or OTF mode (\^`\_doresizeunifont`).
+   In both modes, it does
+   \begtt \catcode`\<=13
+   \_font \_tenXX = <fontname> \_sizespec
+   \endtt
+   The `<fontname>` is generated by the `\fontname` \TeX/ primitive where
+   \`\_rfontskipat` removes the `at<dimen>` part of the `\_fontname` output.
+   The `<fontname>` is generated differently in OTF mode, see
+   \^`\_doresizeunifont` macro.\nl
+   The \`\_whatresize` is defined as `<variant-name>`.
+   \_cod -----------------------------
+
+\_def\_resizefont#1#2{%
+    \_edef\_whatresize{#1}%
+    \_ifx \_fontselector \_undefined \_doresizefont#2%
+    \_else \_ea \_doresizefont \_fontselector \_fi
+    \_lastmagsize=\_zo
+    \_slet{_tryload#1}{_relax}%
+}
+\_def\_doresizetfmfont#1{\_logfont{#1}%
+   \_ea\_font\_ea#1\_ea\_rfontskipat
+      \_fontname \_cs{_ten\_whatresize} \_relax\_space \_sizespec \_relax
+}
+\_let\_doresizefont=\_doresizetfmfont
+\_def\_logfont#1{} % default is no logging of used fonts
+
+\_def\_rfontskipat#1{\_ifx#1"\_ea\_rfskipatX \_else\_ea\_rfskipatN\_ea#1\_fi}
+\_def\_rfskipatX #1" #2\_relax{"\_whichtfm{#1}"}
+\_def\_rfskipatN #1 #2\_relax{\_whichtfm{#1}}
+
+   \_doc -----------------------------
+   \`\fontdef` `<font switch>{<modifiers><variant selector>}`
+   opens group, runs `<modifiers><variant selector>` (i.e.\ it runs `#2` parameter).
+   The font switch `#1` saved in the \`\_fontselector` macro is re-declared
+   because the variant selector runs the \^`\_resizefont`. Now, we need to
+   keep the current meaning of the font switch `#1` but we must leave the
+   opened group. This is done by the \`\_keepmeaning` macro.
+   \nl
+   \`\fontlet` `<font switch A> <font switch B> <size spec>` does
+   \begtt \catcode`\<=13
+   \font <font switch A> = <fontname> <sizespec>
+   \endtt
+   The `<fontname>` is extracted using the primitive command `\_fontname <font switch B>`.
+   \_cod -----------------------------
+
+\_def \_fontdef #1#2{\_begingroup
+   \_ifx\_fontselector\_undefined \_def\_fontselector{#1}\_fi
+   \_reloading #2%
+   \_ea \_keepmeaning \_fontselector \_endgroup
+}
+\_def\_fontlet#1#2{\_ifx #2=\_ea\_fontlet \_ea#1\_else
+  \_ea\_font\_ea#1\_ea\_rfontskipat\_fontname#2 \_relax\_space \_fi
+}
+\_def \_keepmeaning #1#2{\_global\_let\_keepmeaningdata=#1%
+   #2\_let#1=\_keepmeaningdata \_global\_let\_keepmeaningdata=\_undefined
+}
+\_public \fontdef \fontlet ;
+
+   \_doc -----------------------------
+   \`\newcurrfontsize` `<size spec>` sets current font size to the `<size spec>`
+   It is implemented by \^`\fontlet`.
+   The font switch of the current font is extracted by `\_the\_font`.
+   We must re-create the control sequence `\_the\_font` because
+   its original meaning is set to \"inaccessible" by \TeX/ when `\font`
+   primitive is started.
+   \nl
+   \`\resizethefont` is implemented by `\newcurrfontsize` using data from
+   the \^`\_sizespec` macro.
+   \_cod -----------------------------
+
+\_def \_newcurrfontsize #1{% \newcurrfontsize{at25pt}
+   \_edef\_tmp{\_ea\_csstring \_the\_font}%
+   \_ea \_fontlet \_csname \_tmp\_ea\_endcsname \_the\_font \_space #1\_relax
+   \_csname \_tmp\_endcsname
+}
+\_protected\_def \_resizethefont{\_newcurrfontsize\_sizespec}
+
+ \_public \newcurrfontsize \resizethefont ;
+
+   \_doc -----------------------------
+   The variant selector is defined by `\protected\def\XX{\_tryloadXX \_tenXX}`
+   The `\_tryloadXX` can be in `\_relax` state if no font modifiers were
+   declared. But normally it does \^`\_resizefont``{XX}\tenXX`. This meaning
+   is activated by the \`\_reloading` macro.
+   \_cod -----------------------------
+
+\_def\_reloading{\_loadf{rm}\_tenrm \_loadf{bf}\_tenbf
+   \_loadf{it}\_tenit \_loadf{bi}\_tenbi
+}
+\_def\_loadf#1#2{\_sdef{_tryload#1}{\_ifmmode \_else \_resizefont{#1}#2\_fi}}
+\_def\_tryloadtt{\_resizefont{tt}\_tentt}
+
+\_let\_tryloadrm=\_relax
+\_let\_tryloadbf=\_relax
+\_let\_tryloadit=\_relax
+\_let\_tryloadbi=\_relax
+
+    \_doc ----------------------------
+    The font selection system allows to use \`\currvar`
+    instead explicitly specified variant selector. The current variant
+    is extracted from `\the\font` output which could be `\_tenXX` control
+    sequence. Then `\currvar` expands to `\_rm` or `\_it` etc.
+    \_cod ----------------------------
+
+\_protected \_def \_currvar{\_cs{_currvar:\_ea \_csstring \_the\_font}}
+\_sdef{_currvar:_tenrm}{\_rm}
+\_sdef{_currvar:_tenbf}{\_bf}
+\_sdef{_currvar:_tenit}{\_it}
+\_sdef{_currvar:_tenbi}{\_bi}
+\_sdef{_currvar:_tentt}{\_tt}
+\_public \currvar ;
+
+   \_doc -----------------------------
+   The \`\_regtfm` `<font id> <optical size data>`
+   saves the <optical size data> concerned to `<font id>`.
+   The `<optical size data>` is in the form as shown below in the code where
+   `\_regtfm` is used.
+   \nl
+   The \`\_wichtfm` `<fontname>` expands to the `<fontname>` or to the corrected
+   `<fontname>` read from the `<optical size data>`. It is used in the
+   \^`\_rfontskipat` macro and it is used in \^`\fontlet` macro.
+   It means that each `<fontname>` generated by the `\fontname` primitive in the
+   `\fontlet` macro is processed by the `\_whichtfm`. The real `<fontname>` or
+   corrected `<fontname>` (depending on the optical data does not exist or exist)
+   is the output of the expansion before `\font` primitive takes this output
+   as its parameter.
+
+   The implementation detail: The `\_<font id>:reg` is defined as the
+   `<optical size data>` and all control sequences `\_<fontname>:reg`
+   from this data line have the same meaning because of the
+   \`\_reversetfm` macro. The `\_whichtfm` expands this data line and apply
+   \`\_dowhichtfm`. This macro selects the right result from the data line
+   by testing with the current `\_optsize` value.
+   \_cod -----------------------------
+
+\_def\_regtfm #1 0 #2 *{\_ea\_def \_csname _#1:reg\_endcsname{#2 16380 \_relax}%
+  \_def\_tmpa{#1}\_reversetfm #2 * %
+}
+\_def\_reversetfm #1 #2 {% we need this data for \_setmathfamily
+   \_ea\_let\_csname _#1:reg\_ea\_endcsname
+   \_csname _\_tmpa:reg\_endcsname
+   \_if*#2\_else \_ea\_reversetfm \_fi
+}
+\_def\_whichtfm #1{%
+   \_ifcsname _#1:reg\_endcsname
+      \_ea\_ea\_ea \_dowhichtfm
+      \_csname _#1:reg\_ea\_endcsname
+   \_else
+      #1%
+   \_fi
+}
+\_def\_dowhichtfm #1 #2 {%
+   \_ifdim\_optsize<#2pt #1\_ea\_ignoretfm\_else \_ea\_dowhichtfm
+\_fi
+}
+\_def\_ignoretfm #1\_relax{}
+
+   \_doc -----------------------------
+   Optical sizes data for preloaded 8bit Latin Modern fonts:
+   \_cod -----------------------------
+
+\_regtfm lmr  0 ec-lmr5 5.5 ec-lmr6 6.5 ec-lmr7 7.5 ec-lmr8 8.5 ec-lmr9 9.5
+                ec-lmr10 11.1 ec-lmr12 15 ec-lmr17 *
+\_regtfm lmbx 0 ec-lmbx5 5.5 ec-lmbx6 6.5 ec-lmbx7 7.5 ec-lmbx8 8.5 ec-lmbx9 9.5
+                ec-lmbx10 11.1 ec-lmbx12 *
+\_regtfm lmri 0 ec-lmri7 7.5 ec-lmri8 8.5 ec-lmri9 9.5 ec-lmri10 11.1 ec-lmri12 *
+\_regtfm lmtt 0 ec-lmtt8 8.5 ec-lmtt9 9.5 ec-lmtt10 11.1 ec-lmtt12 *
+
+\_setfontsize {at10pt} % default font size
+
+\_endcode %---------------------------------------------------
+
+
+\sec[setfontsize] Scaling fonts in text mode (low-level macros)
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\secc The `\setfontsize` macro
+
+The \^`\setfontsize` `{<size spec>}`
+saves the information about `<size spec>`. This information is taken into
+account when a variant selector (for example `\rm`, `\bf`, `\it`, `\bi`)
+or `\resizethefont` is used. The `<size spec>` can be:
+\begitems
+* `at<dimen>`, for example `\setfontsize{at12pt}`. It gives the desired font size directly.
+* `scaled<scale factor>`, for example `\setfontsize{scaled1200}`. The font is
+  scaled in respect to its native size (which is typically 10\,pt). It
+  behaves like `\font\... scaled<number>`.
+* `mag<decimal number>`, for example `\setfontsize{mag1.2}`. The font is
+  scaled in respect to the current size of the fonts given by the previous
+  \^`\setfontsize` command.
+\enditems
+The initialization value in \OpTeX/ is given by `\setfontsize{at10pt}`.
+
+The \^`\resizethefont` resizes the currently selected font to the size given by previous
+\^`\setfontsize`. For example
+
+\begtt
+                     The 10 pt text is here,
+\setfontsize{at12pt} the 10 pt text is here unchanged...
+\resizethefont       and the 12 pt text is here.
+\endtt
+%
+The \^`\setfontsize` command acts like {\em font modifier}. It means that it
+saves information about fonts but does not change the font actually until
+variant selector or \^`\resizethefont` is used.
+
+The following example demonstrates the `mag` format of \^`\setfontsize`
+parameter. It is only a curious example probably not used in practical
+typography.
+
+\begtt
+\def\smaller{\setfontsize{mag.9}\resizethefont}
+Text \smaller text \smaller text \smaller text.
+\endtt
+
+\secc[fontprimitive] The `\font` primitive
+
+If you load a font directly by `\font` primitive and you want to
+create a size-dependent selector for such font then you can use
+\~`\resizethefont`:
+
+\begtt
+\font\tencomfortaa=Comfortaa-Regular-T1 at10pt
+\def\comfortaa{\tencomfortaa\resizethefont}
+
+\comfortaa The 10 pt text is here
+\setfontsize{at12pt}
+\comfortaa The 12 pt text is here
+\endtt
+%
+The example above uses the 8\,bit `tfm` font. You can use Unicode font too, of
+course. The \^`\fontfam` macro initializes the extended `\font` primitive
+features for \LuaTeX/ (see section \ref[exfont]).
+If you didn't use this command, you must initialize
+these features by the \^`\initunifonts` command explicitly, for example:
+
+\begtt
+\initunifonts
+\font\tencyklop=[cyklop-regular] at10pt % the font cyklop-regular.otf is loaded
+\def\cyklop{\tencyklop\resizethefont}
+
+\cyklop The 10 pt text is here
+\setfontsize{at12pt}
+\cyklop The 12 pt text is here
+\endtt
+
+\secc[fontdef] The \code{\\fontdef} declarator
+
+You can declare `\<newfont>` by the \~`\fontdef` command.
+
+\begtt \catcode`\<=13
+  \fontdef \<newfont> {<font modifiers> \<variant-selector>}
+  example:
+  \fontdef \bigfont {\setfontsize{at15pt}\bf}
+\endtt
+%
+This command runs `<font modifiers> \<variant-selector>` in an internal group and sets the
+resulting selected font as `\<newfont>`.
+
+The resulting `\<newfont>` declared by \~`\fontdef` is \"fixed font switch"
+independent of \^`\setfontsize` and other font modifiers. More exactly, it is
+a fixed font switch when it is used but it can depend on the current font
+modifiers and font family and given font modifiers when it is declared.
+
+The parameter of the \~`\fontdef` macro must be exactly finished by the
+variant selector. More information about font modifiers
+and variant selectors are in the section~\ref[fontsystem].
+
+\secc[fontlet] The \code{\\fontlet} declarator
+
+We have another command for scaling: \^`\fontlet` which can resize
+arbitrary font given by its font switch.
+This font switch was declared by the
+`\font` primitive or the \~`\fontdef` macro.
+
+\begtt \catcode`\<=13
+  \fontlet \<newfont> = \<fontswitch> <sizespec>
+  example:
+  \fontlet \bigfont = \_tenbf at15pt
+\endtt
+
+The resulted `\bigfont` is the same as in the previous example where \~`\fontdef`
+was used. The advantage of \~`\fontdef` macro will be more clear when you load
+font families by `\fontfam` and you are using more font modifiers declared
+in such families.
+
+Summary: you can declare font switches:
+\begitems
+* by the `\font` primitive if you know the font file,
+* by the \^`\fontlet` command if you know the font switch and the size, or
+* by the \~`\fontdef` command if you know the variant and modifiers.
+\enditems
+
+\secc Optical sizes
+
+There are font families with more font files where almost the same font is
+implemented in various design sizes: `cmr5`, `cmr6`, `cmr7`, `cmr8`, `cmr9`,
+`cmr10`, `cmr12`, `cmr17` for example. This feature is called \"optical
+sizes". \OpTeX/ chooses a font with an optical size closest to desired size
+specified by the \^`\setfontsize`, when `at<dimen>` or `mag<coefficient>` is used.
+When `scaled<scale factor>` is used then optical size is chosen using the value
+of the `\defaultoptsize` register and such font is scaled by the specified
+`<scale factor>`. There is `\defaultoptsize=10pt` by default.
+
+Font collections with optical sizes must be registered by the
+\^`\_regtfm` for `tfm` files or \^`\_regoptsizes` for Unicode fonts.
+\OpTeX/ registers 8bit Latin Moder fonts in the format (`fonts-resize.opm` file)
+and OTF Latin Modern fonts in the `f-lmfonts.opm` file.
+
+\secc Implementation notes
+
+\_endinput
+
+2020-04-17 \resizethefont introduced
+2020-03-17 released
diff --git a/Master/texmf-dist/tex/optex/base/fonts-select.opm b/Master/texmf-dist/tex/optex/base/fonts-select.opm
new file mode 100644
index 00000000000..740b311a677
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/fonts-select.opm
@@ -0,0 +1,846 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \fontfam {Fonts selection system <2021-02-25>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\initunifonts` macro extends \LuaTeX's font capabalities,
+   in order to be able to load Unicode fonts. Unfortunately, this part of
+   \OpTeX/ depends on `luaotfload` package, which adapts Con\TeX/t's generic
+   font loader for plain \TeX/ and \LaTeX. `luaotfload` uses Lua functions
+   from \LaTeX's `luatexbase` namespace, we provide our own replacements.
+   Moreover, `\initunifont` switches with
+   the \^`\_doresizefont` macro to OTF mode which is represented by the
+   macro \`\_doresizeunifont`. This mode includes
+   a fallback to TFM mode if \^`\_fontnamegen` is not defined.
+   Finally, `\initunifonts` sets itself to relax because we don't want to do
+   this work twice.\nl
+   \`\_ttunifont` is default font for `\tt` variant if
+   `f-lmfonts.opm` (or another font file where `\tt` is declared) is not loaded.
+   \_cod -----------------------------
+
+\_def\_initunifonts {%
+   \directlua{%
+      require('luaotfload-main')
+      luaotfload.main()
+   }%
+   \_gdef\_rfskipatX ##1" ##2\_relax{"##1"}%
+   \_global\_let \_doresizefont=\_doresizeunifont
+   \_gdef\_tryloadtt {\_fontdef\_tentt{\_let\_fontnamegen=\_ttunifont\_rm}}%
+   \_global\_let \_initunifonts=\_relax % we need not to do this work twice
+   \_global\_let \initunifonts=\_relax
+}
+\_gdef\_doresizeunifont #1{\_logfont{#1}%
+   \_ifx\_fontnamegen\_undefined \_doresizetfmfont#1\_else
+       \_font#1={\_fontnamegen} \_sizespec \_relax \_setwsp#1\_relax
+   \_fi
+}
+\_def\_ttunifont{[lmmono10-regular]:\_fontfeatures-tlig;}
+
+\_public \initunifonts ;
+
+   \_doc -----------------------------
+   The \`\_famdecl` `[<Family Name>] \<Famselector> {<comment>} {<modifiers>} {<variants>} {<math>}`\nl
+   `{<font for testing>} {\def`\^`\_fontnamegen``{<data>}}` runs \^`\initunifonts`, then
+   checks if `\<Famselector>` is defined. If it is true, then closes the file by
+   `\endinput`. Else it defines `\<Famselector>` and saves it to the
+   internal `\_f:<currfamily>:main.fam` command.
+   The macro \`\_initfontfamily` needs it. The \`\_currfamily` is set
+   to the `<Famselector>` because the following \^`\moddef` commands need to
+   be in the right font family context. The `\_currfamily` is set to the
+   `<Famselector>` by the `\<Famselector>` too, because `\<Famselector>`
+   must set the right font family context. The font family context is given by the current
+   `\_currfamily` value and by the actual meaning of the \^`\_fontnamegen` macro.
+   The \`\_mathfaminfo` is saved for usage in the catalog.
+   \_cod -----------------------------
+
+\_def\_famdecl [#1]#2#3#4#5#6#7#8{%
+   \_initunifonts \_uniaccents
+   \_unless\_ifcsname _f:\_csstring#2:main.fam\_endcsname
+      \_isfont{#7}\_iffalse
+         \_opwarning{Family [#1] skipped, font "#7" not found}\_ea\_ea\_ea\_endinput \_else
+         \_edef\_currfamily {\_csstring #2}\_def\_mathfaminfo{#6}%
+         \_wterm {FONT: [#1] -- \_string#2 \_detokenize{(#3)^^J mods:{#4} vars:{#5} math:{#6}}}%
+         \_unless \_ifx #2\_undefined
+            \_opwarning{\_string#2 is redefined by \_string\_famdecl\_space[#1]}\_fi
+         \_protected\_edef#2{\_def\_noexpand\_currfamily{\_csstring #2}\_unexpanded{#8\_resetfam}}%
+         \_ea \_let \_csname _f:\_currfamily:main.fam\_endcsname =#2%
+      \_fi
+   \_else \_csname _f:\_csstring#2:main.fam\_endcsname \_reloading \_rm \_ea \_endinput \_fi
+}
+\_def\_initfontfamily{%
+   \_csname _f:\_currfamily:main.fam\_endcsname \_reloading \_rm
+}
+
+   \_doc -----------------------------
+   \`\_regoptsizes` `<internal-template> <left-output>?<right-output> <resizing-data>`
+   prepares data for using by the \`\_optname` `<internal-template>` macro.
+   The data are saved to the `\_oz:<internal-template>` macro.
+   When the `\_optname` is expanded then the data are scanned by the macro
+   \`\_optnameA` `<left-output>?<right-output> <mid-output> `\code{<}`<size>`
+   in the loop.\nl
+   \`\_optfontalias` `{<template A>}{<template B>}` is defined as
+   `\let\_oz:<templateA>=\_oz:<templateB>`.
+   \_cod -----------------------------
+
+\_def\_regoptsizes #1 #2?#3 #4*{\_sdef{_oz:#1}{#2?#3 #4* }}
+\_def\_optname #1{\_ifcsname _oz:#1\_endcsname
+   \_ea\_ea\_ea \_optnameA \_csname _oz:#1\_ea\_endcsname
+   \_else \_failedoptname{#1}\_fi
+}
+\_def\_failedoptname #1{optname-fails:(#1)}
+\_def\_optnameA #1?#2 #3 <#4 {\_ifx*#4#1#3#2\_else
+   \_ifdim\_optsize<#4pt #1#3#2\_optnameC
+   \_else \_afterfifi \_optnameA #1?#2 \_fi\_fi
+}
+\_def\_optnameC #1* {\_fi\_fi}
+\_def\_afterfifi #1\_fi\_fi{\_fi\_fi #1}
+\_def\_optfontalias #1#2{\_slet{_oz:#1}{_oz:#2}}
+
+   \_doc -----------------------------
+   \`\_fvars` `<rm-template> <bf-template> <it-template> <bi-template>`
+   saves data for usage by the `\_currV` macro. If a template is only dot
+   then previous template is used (it can be used if the font family doesn't
+   dispose with all standard variants).
+   \nl
+   \`\_currV` expands to a template declared by `\_fvars` depending on the
+   `<variant name>`. Usable only of standard four variants. Next variants
+   can be declared by the \^`\famvardef` macro.
+   \nl
+   \`\_fsetV` `<key>=<value>,...,<key>=<value>` expands to
+   `\def\_<key>V{<value>}` in the loop.
+   \nl
+   \`\_onlyif` `<key>=<value-a>,<value-b>...,<value-z>: {<what>}`
+   runs <what> only if the `\_<key>V` is defined as `<value-a>` or
+   `<value-b>` or ... or `<value-z>`.
+   \nl
+   \`\_prepcommalist` `ab,{},cd,\_end,` expands to `ab,,cd,` (auxiliary macro
+   used in `\_onlyif`).
+   \_cod -----------------------------
+
+\_def\_fvars #1 #2 #3 #4 {%
+   \_sdef{_fvar:rm}{#1}%
+   \_sdef{_fvar:bf}{#2}%
+   \_ifx.#2\_slet{_fvar:bf}{_fvar:rm}\_fi
+   \_sdef{_fvar:it}{#3}%
+   \_ifx.#3\_slet{_fvar:it}{_fvar:rm}\_fi
+   \_sdef{_fvar:bi}{#4}%
+   \_ifx.#4\_slet{_fvar:bi}{_fvar:it}\_fi
+}
+\_def\_currV{\_cs{_fvar:\_whatresize}}
+\_def\_V{ }
+\_def \_fsetV #1 {\_fsetVa #1,=,}
+\_def \_fsetVa #1=#2,{\_isempty{#1}\_iffalse
+   \_ifx,#1\_else\_sdef{_#1V}{#2}\_ea\_ea\_ea\_fsetVa\_fi\_fi
+}
+\_def \_onlyif #1=#2:#3{%
+    \_edef\_act{\_noexpand\_isinlist{,\_prepcommalist #2,\_end,}{,\_cs{_#1V},}}\_act
+    \_iftrue #3\_fi
+}
+\_def\_prepcommalist#1,{\_ifx\_end#1\_empty\_else #1,\_ea\_prepcommalist\_fi}
+
+   \_doc -----------------------------
+   The \`\moddef` `\<modifier> {<data>}` simply speaking does
+   `\def\<modifier>{<data>}`, but we need to respect
+   the family context. In fact, `\protected\def\_f:<current family>:<modifier>{<data>}` is
+   performed and the `\<modifier>` is defined as
+   \`\_famdepend``\<modifier>{_f:\_currfamily:<modifier>}`. It expands to
+   `\_f:\_currfamily:<modifier>` value if it is defined or it prints
+   the warning. When the `\_currfamily` value is
+   changed then we can declare the same `\<modifier>` with a different meaning.
+
+   When a user declares a prefixed variant of the `\<modifier>` then unprefixed
+   modifier name is used in internal macros, this is the reason why we are using
+   the \`\_remifirstunderscore``\_tmp` (where `\_tmp` expands to
+   `_<something>` or to `<something>`. The `\_remifirstunderscore`
+   redefines `\_tmp` in the way that it
+   expands only to `<something>` without the first `_`.
+
+   \`\_setnewmeaning` `<cs-name>=\_tmpa <by-what>` does exactly `\_let <csname>=\_tmpa`
+   but warning is printed if <cs-name> is defined already and it is not a variant
+   selector or font modifier.
+
+   \`\_addtomodlist` `<font modifier>` adds given modifier to \`\_modlist`
+   macro. This list is used after `\resetmod` when a new family is selected by
+   a family selector, see \`\_resetfam` macro.
+   This allows reinitializing the same current modifiers in the font context
+   after the family is changed.
+   \_cod -----------------------------
+
+\_def \_moddef #1#2{\_edef\_tmp{\_csstring#1}%
+   \_sdef{_f:\_currfamily:\_tmp}{\_addtomodlist#1#2\_reloading}%
+   \_protected \_edef \_tmpa{\_noexpand\_famdepend\_noexpand#1{_f:\_noexpand\_currfamily:\_tmp}}%
+   \_setnewmeaning #1=\_tmpa \moddef
+}
+\_protected \_def\_resetmod {\_cs{_f:\_currfamily:resetmod}} % private variant of \resetmod
+\_def \_resetfam{\_def\_addtomodlist##1{}\_resetmod
+   \_edef \_modlist{\_ea}\_modlist
+   \_let\_addtomodlist=\_addtomodlistb
+}
+\_def \_currfamily{} % default current family is empty
+\_def \_modlist{}    % list of currently used modifiers
+
+\_def \_addtomodlist#1{\_addto\_modlist#1}
+\_let \_addtomodlistb=\_addtomodlist
+
+\_def\_famdepend#1#2{\_ifcsname#2\_endcsname \_csname#2\_ea\_endcsname \_else
+   \_ifx\_addtomodlist\_addtomodlistb
+      \_opwarning{\_string#1 is undeclared in family "\_currfamily", ignored}\_fi\_fi
+}
+\_def\_setnewmeaning #1=\_tmpa#2{%
+   \_ifx #1\_undefined \_else \_ifx #1\_tmpa \_else
+      \_opwarning{\_string#1 is redefined by \_string#2}%
+   \_fi\_fi
+   \_let#1=\_tmpa
+}
+\_public \moddef ;
+
+   \_doc -----------------------------
+   The \`\famvardef` `\<XX> {<data>}`
+   uses analogical trick like \^`\moddef` with
+   the \^`\_famdepend` macro. The auxiliary
+   \`\_famvardefA` `\<XX> \_ten<XX> \_tryload<XX> {<data>}` is used.
+   It does:
+   \begitems
+   * `\def \_tryload:<currfam>:<XX> {`\^`\fontdef`` \_ten<XX> {<data>}}` loads font `\_ten<XX>`,
+   * `\protected\def \<XX> {\_famdepend \<XX> {_f:<currfam>:<XX>}}`,
+   * `\def \_f:<currfam>:<XX> {\_tryload:<currfam>:<XX>\_ten<XX>}` keeps family dependent definition,
+   * `\def \_currvar:_ten<XX> {\<XX>}` in order to the \^`\currvar` macro work correctly.
+   \enditems
+   `\famvardef\tt` behaves somewhat differently: it doesn't re-define the
+   `\tt` macro which is defined  as `\_tryloadtt \_tentt` in sections~\ref[math-preload]
+   and~\ref[unimath-codes]. It only re-defines the internal `\_tryloadtt` macro.
+   \_cod -----------------------------
+
+\_def\_famvardef#1{\_edef\_tmp{\_csstring#1}%
+   \_ea\_famvardefA \_ea#1\_csname _ten\_tmp\_ea\_endcsname
+      \_csname _tryload:\_currfamily:\_tmp\_endcsname
+}
+\_def\_famvardefA #1#2#3#4{% #1=\XX #2=\_tenXX #3=\_tryload:currfam:XX #4=data
+   \_isinlist{.\_rm\_bf\_it\_bi\currvar\_currvar}#1\_iftrue
+      \_opwarning{\_string\famvardef:
+         You cannot re-declare standard variant selector \_string#1}%
+   \_else
+      \_def#3{\_fontdef#2{#4}}%
+      \_protected\_edef\_tmpa{\_noexpand\_famdepend\_noexpand#1{_f:\_noexpand\_currfamily:\_tmp}}%
+      \_ifx #1\_tt \_let\_tryloadtt=#3\_else \_setnewmeaning #1=\_tmpa \famvardef \_fi
+      \_sdef{_f:\_currfamily:\_tmp}{#3#2}%
+      \_sdef{_currvar:\_csstring#2}{#1}%
+   \_fi
+}
+\_public \famvardef ;
+
+   \_doc -----------------------------
+   The \`\fontfam` `[<Font Family>]` does:
+   \begitems
+   * Convert its parameter to lower case and without spaces, e.g.\ `<fontfamily>`.
+   * If the file `f-<fontfamily>.opm` exists read it and finish.
+   * Try to load user defined `fams-local.opm`.
+   * If the `<fontfamily>` is declared in `fams-local.opm` or `fams-ini.opm`
+     read relevant file and finish.
+   * Print the list of declared families.
+   \enditems
+   The `fams-local.opm` is read by the \`\_tryloadfamslocal` macro. It sets
+   itself to `\_relax` because we need not load this file twice.
+   The \`\_listfamnames` macro prints registered font families to the
+   terminal and to the log file.
+   \_cod -----------------------------
+
+\_def\_fontfam[#1]{%
+   \_lowercase{\_edef\_famname{\_ea\_removespaces #1 {} }}%
+   \_isfile {f-\_famname.opm}\_iftrue \_opinput {f-\_famname.opm}%
+   \_else
+       \_tryloadfamslocal
+       \_edef\_famfile{\_trycs{_famf:\_famname}{}}%
+       \_ifx\_famfile\_empty \_listfamnames
+       \_else \_opinput {\_famfile.opm}%
+   \_fi\_fi
+}
+\_def\_tryloadfamslocal{%
+   \_isfile {fams-local.opm}\_iftrue
+      \_opinput {fams-local.opm}\_famfrom={}%
+   \_fi
+   \_let \_tryloadfamslocal=\_relax  % need not to load fams-local.opm twice
+}
+\_def\_listfamnames {%
+   \_wterm{===== List of font families ======}
+   \_begingroup
+       \_let\_famtext=\_wterm
+       \_def\_faminfo [##1]##2##3##4{%
+           \_wterm{ \_space\_noexpand\fontfam [##1] -- ##2}%
+       \_let\_famalias=\_famaliasA}%
+       \_opinput {fams-ini.opm}%
+       \_isfile {fams-local.opm}\_iftrue \_opinput {fams-local.opm}\_fi
+       \_message{^^J}%
+   \_endgroup
+}
+\_def\_famaliasA{\_message{ \_space\_space\_space\_space -- alias:}
+   \_def\_famalias[##1]{\_message{[##1]}}\_famalias
+}
+\_public \fontfam ;
+
+   \_doc -----------------------------
+   When the `fams-ini.opm` or `fams-local.opm` files are read then we need
+   to save only a mapping from family names or alias names to the font family file
+   names. All other information is ignored in this case. But if these files
+   are read by the `\_listfamnames` macro or when printing a catalog then more
+   information is used and printed.\nl
+   \`\_famtext` does nothing or prints the text on the terminal.
+   \nl
+   \`\_faminfo` `[<Family Name>] {<comments>} {<file-name>} {<mod-plus-vars>}`
+   does\nl `\_def \_famf:<familyname> {<file-name>}` or prints information on
+   the terminal.
+   \nl
+   \`\_famalias` `[<Family Alias>]` does `\def \_famf:<familyalias> {<file-name>}`
+   where `<file-name>` is stored from the previous `\_faminfo` command. Or
+   prints information on the terminal.
+   \nl
+   \`\_famfrom` declares type foundry or owner or designer of the font family.
+   It can be used in `fams-ini.opm` or `fams-local.opm` and it is printed
+   in the font catalog.
+   \_cod -----------------------------
+
+\_def\_famtext #1{}
+\_def\_faminfo [#1]#2#3#4{%
+   \_lowercase{\_edef\_tmp{\_ea\_removespaces #1 {} }}%
+   \_sdef{_famf:\_tmp}{#3}%
+   \_def\_famfile{#3}%
+}
+\_def\_famalias [#1]{%
+   \_lowercase{\_edef\_tmpa{\_ea\_removespaces #1 {} }}%
+   \_sdef{_famf:\_tmpa\_ea}\_ea{\_famfile}%
+}
+\_newtoks\_famfrom
+\_input fams-ini.opm
+\_let\_famfile=\_undefined
+\_famfrom={}
+
+   \_doc -----------------------------
+   When the \^`\fontfam``[catalog]` is used then the file
+   `fonts-catalog.opm` is read. The macro \^`\_faminfo` is redefined here
+   in order to print catalog samples of all declared modifiers/variant
+   pairs. The user can declare different samples and different behavior of
+   the catalog, see the end of catalog listing for more information.
+   The default parameters
+   \`\catalogsample`, \`\catalogmathsample`, \`\catalogonly` and
+   \`\catalogexclude` of the catalog are declared here.
+   \_cod -----------------------------
+
+\_newtoks \_catalogsample
+\_newtoks \_catalogmathsample
+\_newtoks \_catalogonly
+\_newtoks \_catalogexclude
+\_catalogsample={ABCDabcd Qsty fi fl áéíóúüů řžč ÁÉÍÓÚ ŘŽČ 0123456789}
+
+\_public \catalogonly \catalogexclude \catalogsample \catalogmathsample ;
+
+   \_doc -----------------------------
+   The font features are managed in the \`\_fontfeatures` macro.
+   They have their implicit values saved in the \`\_defaultfontfeatures`
+   and the \`\setff` `{<features>}`
+   can add next font features. If there is the same font feature as the newly
+   added one then the old value is removed from the `\_fontfeatures` list.
+   \_cod -----------------------------
+
+\_def \_defaultfontfeatures {+tlig;}
+\_def \_setff #1{%
+   \_ifx^#1^\_let \_fontfeatures=\_defaultfontfeatures
+   \_else \_edef\_fontfeatures{\_fontfeatures #1;}\_fi
+   \_reloading
+}
+\_setff {} % default font features: +tlig;
+\_def\_removefeature #1{%
+    \_isinlist\_fontfeatures{#1}\_iftrue
+        \_def\_tmp ##1#1##2;##3\_relax{\_def\_fontfeatures{##1##3}}%
+        \_ea \_tmp \_fontfeatures \_relax
+    \_fi
+}
+\_public \setff ;
+
+   \_doc -----------------------------
+   The \`\setfontcolor` and \`\setletterspace` are macros based on the
+   special font features provided by \LuaTeX/ (and by \XeTeX/ too but it is not
+   our business). The \`\setwordspace` recalulates the `\fontdimen2,3,4`
+   of the font using the \`\setwsp` macro which is used by the
+   \^`\_doresizeunifont` macro. It activates a dummy font feature `+Ws` too in
+   order the font is reloded by the `\font` primitive (with independent
+   `\fontdimen` registers).
+   \_cod -----------------------------
+
+\_def\_savedfontcolor{}
+\_def\_savedletterspace{}
+\_def\_savedwsp{}
+
+\_def \_setfontcolor #1{\_removefeature{color=}%
+    \_edef\_tmp{\_calculatefontcolor{#1}}%
+    \_ifx\_tmp\_empty \_else \_edef\_fontfeatures{\_fontfeatures color=\_tmp;}\_fi
+    \_reloading
+}
+\_def \_setletterspace #1{\_removefeature{letterspace=}%
+    \_if^#1^\_else \_edef\_fontfeatures{\_fontfeatures letterspace=#1;}\_fi
+    \_reloading
+}
+\_def \_setwordspace #1{%
+   \_if^#1^\_def\_setwsp##1{}\_removefeature{+Ws}%
+   \_else \_def\_setwsp{\_setwspA{#1}}\_setff{+Ws}\_fi
+   \_reloading
+}
+\_def\_setwsp #1{}
+\_def\_setwspA #1#2{\_fontdimen2#2=#1\_fontdimen2#2%
+   \_fontdimen3#2=#1\_fontdimen3#2\_fontdimen4#2=#1\_fontdimen4#2}
+
+\_def\_calculatefontcolor#1{\_trycs{_fc:#1}{#1}} % you can define more smart macro ...
+\_sdef{_fc:red}{FF0000FF}    \_sdef{_fc:green}{00FF00FF} \_sdef{_fc:blue}{0000FFFF}
+\_sdef{_fc:yellow}{FFFF00FF} \_sdef{_fc:cyan}{00FFFFFF}  \_sdef{_fc:magenta}{FF00FFFF}
+\_sdef{_fc:white}{FFFFFFFF}  \_sdef{_fc:grey}{00000080}  \_sdef{_fc:lgrey}{00000025}
+\_sdef{_fc:black}{} % ... you can declare more colors...
+
+\_public \setfontcolor \setletterspace \setwordspace ;
+
+\_endcode %---------------------------------------------------
+
+
+\sec[fontsystem] The Font Selection System
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+The basic principles of the Font Selection System used in \OpTeX/
+was documented in the section~\ref[fontfam].
+
+\secc Terminology
+
+We distinguish between
+\begitems
+* {\em font switchers}, they are declared by the `\font` primitive or by
+  \^`\fontlet` or \~`\fontdef` macros, they select given font.
+* {\em variant selectors}, there are four basic variant selectors
+  \^`\rm`, \^`\bf`, \^`\it`, \^`\bi`, there is a special selector \^`\currvar`.
+  More variant selectors can be declared by the \~`\famvardef` macro.
+  They select the font depending on the given variant and on the {\em font context}
+  (i.e.\ on current family and on more features given by font modifiers).
+  In addition, \OpTeX/ defines \~`\tt` as variant selector
+  independent of chosen font family. It selects typewriter-like font.
+* {\em font modifiers} are declared in a family (`\cond`, `\caps`) or are
+  \"build in" (\^`\setfontsize``{<size spec>}`, \~`\setff{<features>}`).
+  They do appropriate change in the {\em font context} but do not select
+  the font.
+* {\em family selectors} (for example `\Termes`, `\LMfonts`),
+  they are declared typically in the {\em font family files}.
+  They enable to switch between font families, they do appropriate
+  change in the {\em font context} but do not select
+  the font.
+\enditems
+
+These commands set their values locally. When the \TeX/ group is
+left then the selected font and the {\em font context} are returned back to the values
+used when the group was opened. They have the following features:
+
+The {\em font context} is a set of macro values that will affect the
+selection of real font when the variant selector is processed. It includes the
+value of {\em current family}, current font size, and
+more values stored by font modifiers.
+
+The {\em family context} is the current family value stored in the font
+context. The variant selectors declared by \~`\famvardef` and
+font modifiers declared by \~`\moddef` are dependent on the {\em family context}.
+They can have the same names but different behavior in different families.
+
+The fonts registered in \OpTeX/ have their macros in the {\em font family files},
+each family is declared in one font family file with the name `f-famname.opm`.
+All families are collected in `fams-ini.opm` and users can give more
+declarations in the file `fams-local.opm`.
+
+\secc Font families, selecting fonts
+
+The \^`\fontfam` `[<Font Family>]` opens the relevant font family file where
+the `<Font Family>` is declared. The family selector is defined here by rules
+described in the section~\ref[fontfamfiles]. Font modifiers and variant
+selectors may be declared here.
+The loaded family is set as current and `\rm` variant selector is processed.
+
+The available declared font modifiers and declared variant selectors are
+listed in the log file when the font family is load. Or you can print
+`\fontfam[catalog]` to show available font modifiers and variant selectors.
+
+The font modifiers can be independent, like `\cond` and `\light`. They can
+be arbitrarily combined (in arbitrary order) and if the font family disposes
+of all such sub-variants then the desired font is selected (after variant
+selector is used). On the other hand, there are font modifiers that negates
+the previous font modifier, for example: `\cond`, `\extend`. You can reset
+all modifiers to their initial value by the \^`\resetmod` command.
+
+You can open more font families by more \^`\fontfam` commands. Then the
+general method to selecting the individual font is:
+
+\begtt \catcode`\<=13
+<family selector> <font modifiers> <variant selector>
+\endtt
+For example:
+\begtt
+\fontfam [Heros]  % Heros family is active here, default \rm variant.
+\fontfam [Termes] % Termes family is active here, default \rm variant.
+{\Heros \caps \cond \it The caps+condensed italics in Heros family is here.}
+The Termes roman is here.
+\endtt
+
+There is one special command \^`\currvar` which acts as a variant selector.
+It keeps the current variant and the font of such variant is
+reloaded with respect to the current font context by the previously given family
+selector and font modifiers.
+
+You can use the \^`\setfontsize` `{<sizespec>}` command in the same sense as
+other font modifiers. It saves information about font size to the font
+context. See section~\ref[setfontsize]. Example:
+
+\begtt
+\rm default size \setfontsize{at14pt}\rm here is 14pt size \it italic is
+in 14pt size too \bf bold too.
+\endtt
+
+A much more comfortable way to resize fonts is using OPmac-like commands
+\~`\typosize` and \~`\typoscale`.
+These commands prepare the right sizes for math
+fonts too and they re-calculate many internal parameters like `\baselineskip`.
+See section~\ref[opmac-fonts] for more information.
+
+
+\secc Math Fonts
+%---------------
+
+Most font families are connected with a preferred Unicode-math font. This
+Unicode-math is activated when the font family is loaded. If you don't prefer
+this and you are satisfied with 8bit math CM+AMS fonts preloaded in the
+\OpTeX/ format then you can use command \^`\noloadmath` before you load a first
+font family.
+
+If you want to use your specially selected Unicode-math font then use
+\^`\loadmath` `{[<font_file>]}` or \^`\loadmath` `{<font_name>}` before first
+`\fontfam` is used.
+
+
+\secc[fontcommands] Declaring font commands
+%----------------------------
+
+Font commands can be font switches, variant selectors, font modifiers,
+family selectors and defined font macros doing something with fonts.
+
+\begitems
+* Font switches can be decared by `\font` primitive (see
+  section~\ref[fontprimitive]) or by \^`\fontlet` command (see
+  section~\ref[fontlet]) or by \~`\fontdef` command (see
+  sections~\ref[fontdef2] and~\ref[fontdef]).
+  When the font switches are used then they select the given font independently
+  of the current font context. They can be used
+  in `\output` routine (for example) because we need to set fixed fonts
+  in headers and footers.
+* Variant selectors are \^`\rm`, \^`\bf`, \^`\it`, \^`\bi`, \~`\tt` and \^`\currvar`. More
+  variant selectors can be declared by \~`\famvardef` command. They select a
+  font dependent on the current font context, see section~\ref[famvardef].
+  The `\tt` selector is documented in section~\ref[tt].
+* Font modifiers are \"build in" or declared by \~`\moddef` command.
+  They do modifications in the font context but don't select any font.
+  \begitems
+  * \"build-in" font modifiers are \^`\setfontsize` (see
+    section~\ref[setfontsize]), \~`\setff` (see section~\ref[setff]),
+    \~`\setfontcolor`, \~`\setletterspace` and \~`\setwordspace`
+    (see section~\ref[specff]). They are independent of font family.
+  * Font modifiers declared by \~`\moddef` depend on the font family and they
+    are typically declared in font family files, see
+    section~\ref[fontfamfiles].
+  \enditems
+* Family selectors set the given
+  font family as current and re-set data used by the family-dependent font
+  modifiers to initial values and to the currently used modifiers.
+  They are declared in font family files
+  by \~`\_famdecl` macro, see section~\ref[fontfamfiles].
+* Font macros can be defined arbitrarily by `\def` primitive by users.
+  See an example in section~\ref[fontmacros].
+\enditems
+
+All declaration commands mentioned here: `\font`, `\fontlet`, `\fontdef`, `\famvardef`,
+`\moddef`, `\_famdecl` and `\def` make local assignment.
+
+\secc[fontdef2] The `\fontdef` declarator in detail
+
+The general format for \^`\fontdef` usage is
+\begtt \catcode`\<=13
+\fontdef\<font switch> {\<family selector> <font modifiers> \<variant selector>}
+\endtt
+%
+where `\<family selector>` and `<font modifiers>` are optional and
+`\<variant selector>` is mandatory.
+
+The \^`\fontdef` does the following steps.
+It pushes the current font context to a stack, it does modifications of the font
+context by given `\<family selector>` and/or `<font modifiers>` and it
+finds the real font by `\<variant selector>`. This font is not selected but
+it is assigned to the declared `\<font switch>` (like `\font` primitive does
+it). Finally, `\fontdef` pops the font context stack, so the current
+font context is the same as it was before `\fontdef` is used.
+
+More about `\fontdef` command including examples is written in
+section~\ref[fontdef].
+
+
+\secc[famvardef] The `\famvardef` declarator
+
+You can declare a new variant selector by the \^`\famvardef` macro. This
+macro has similar syntax as \^`\fontdef`:
+\begtt \catcode`\<=13
+\famvardef\<new variant selector> {\<family selector> <font modifiers> \<variant selector>}
+\endtt
+%
+where `\<family selector>` and `<font modifiers>` are optional and
+`\<variant selector>` is mandatory.
+The `\<new variant selector>` should be used in the same sense as `\rm`,
+`\bf` etc. It can be used as the final command in next
+\^`\fontdef` or \^`\famvardef` declarators
+too. When the `\<new variant selector>` is used in the normal text then it does
+the following steps: pushes current font context to a stack, modifies font
+context by declared `\<family selector>` and/or `<font modifiers>`,
+runs following `\<variant selector>`.
+This last one selects a real font. Then pops the font context stack.
+The new font is selected but the font context has its original values.
+This is main difference between `\famvardef\foo{...}` and `\def\foo{...}`.
+
+Moreover, the \^`\famvardef` creates the `\<new variant selector>` family dependent.
+When the selector is used in another family context than it is defined then a warning is
+printed on the terminal \"<var selector> is undeclared in the current family"
+and nothing happens. But you can declare the same variant selector by
+\^`\famvardef` macro in the context of a new family. Then the same command
+may do different work depending on the current font family.
+
+Suppose that the selected font family provides the font modifier `\medium` for
+mediate weight of fonts. Then you can declare:
+\begtt
+\famvardef \mf {\medium\rm}
+\famvardef \mi {\medium\it}
+\endtt
+Now, you can use six independent variant selectors `\rm`, `\bf`, `\it`,
+`\bi`, `\mf` and  `\mi` in the selected font family.
+
+A `\<family selector>` can be written before `<font modifiers>` in the
+`\famvardef` parameter. Then the `\<new variant selector>` is declared in
+the current family but it can use fonts from another family represented by
+the `\<family selector>`.
+
+When you are mixing fonts from more families then you probably run
+into a problem with incompatible ex-heights. This problem can be solved using
+\^`\setfontsize` and \^`\famvardef` macros:
+\begtt
+\fontfam[Heros]  \fontfam[Termes]
+
+\def\exhcorr{\setfontsize{mag.88}}
+\famvardef\rmsans{\Heros\exhcorr\rm}
+\famvardef\itsans{\Heros\exhcorr\it}
+
+Compare ex-height of Termes \rmsans with Heros \rm and Termes.
+\endtt
+
+The variant selectors (declared by \~`\famvardef`) or font
+modifiers (declared by \~`\moddef`) are (typically) control sequences in user name
+space (`\mf`, `\caps`). They are most often declared in font family files and
+they are loaded by \^`\fontfam`. A conflict with such names in
+user namespace can be here. For example: if `\mf` is defined by a user and then
+`\fontfam[Roboto]` is used then `\famvardef\mf` is performed for Roboto
+family and the original meaning of `\mf` is lost. But \OpTeX/ prints warning
+about it. There are two cases:
+
+\begtt
+\def\mf{Metafont}
+\fontfam[Roboto]  % warning: "The \mf is redefined by \famvardef" is printed
+  or
+\fontfam[Roboto]
+\def\mf{Metafont} % \mf variant selector redefined by user, we suppose that \mf
+                  % is used only in the meaning of "Metafont" in the document.
+\endtt
+
+\secc[tt] The `\tt` variant selector
+
+\^`\tt` is an additional special variant selector which is defined as \"select typewriter
+font independently of the current font family". By default, the typewriter font-face
+from LatinModern font family is used.
+
+The \^`\tt` variant selector is used in \OpTeX/ internal macros
+\^`\_ttfont` (verbatim texts) and \^`\_urlfont` (printing URL's).
+
+You can redefine the behavior of `\tt` by \^`\famvardef`. For example:
+
+\begtt
+\fontfam[Cursor]
+\fontfam[Heros]
+\fontfam[Termes]
+\famvardef\tt{\Cursor\setff{-liga;-tlig}\rm}
+
+Test in Termes: {\tt text}. {\Heros\rm Test in Heros: {\tt text}}.
+Test in URL \url{http://something.org}.
+\endtt
+%
+You can see that `\tt` stay family independent. This is a special feature only
+for `\tt` selector. New definition is used in \^`\_ttfont` and \^`\_urlfont` too.
+It is recommended to use `\setff{-liga;-tlig}` to suppress the
+ligatures in typewriter fonts.
+
+If Unicode math font is loaded then the `\tt` macro selects typewriter
+font-face in math mode too. This face
+is selected from used Unicode math font and it is independent of
+`\famvardef\tt` declaration.
+
+
+\secc[fontmacros] Font commands defined by `\def`
+
+Such font commands can be used as fonts selectors for titles, footnotes,
+citations, etc. Users can define them.
+
+The following example shows how to define a \"title-font selector".
+Titles are not only bigger but they are typically in the bold variant. When a user puts
+`{\it...}` into the title text then he/she expects bold italic here, no normal
+italic. You can remember the great song by John Lennon \"Let It Be" and
+define:
+
+\begtt
+\def\titlefont{\setfontsize{at14pt}\bf \let\it\bi}
+...
+{\titlefont Title in bold 14pt font and {\it bold 14pt italics} too}
+\endtt
+
+\OpTeX/ defines similar internal commands \^`\_titfont`, \^`\_chapfont`, \^`\_secfont` and
+\^`\_seccfont`, see section~\ref[sections]. The commands \^`\typosize` and
+\^`\boldify` are used in these macros. They set the math fonts to given size too and they
+are defined in section~\ref[opmac-fonts].
+
+
+\secc[setff] Modifying font features
+%----------------------------
+
+Each OTF font provides \"font features". You can list these font features
+by `otfinfo -f font.otf`. For example, LinLibertine fonts provide `frac` font
+feature. If it is active then fractions like 1/2 are printed in a special
+form.
+
+The font features are part of the font context data.
+The macro \^`\setff` `{<feature>}` acts like family independent font modifier and
+prepares a new <feature>. You must use a variant selector in order to
+reinitialize the font with the new font feature. For example
+\^`\setff``{+frac}\rm` or \^`\setff``{+frac}`\^`\currvar`. You can declare a new variant
+selector too:
+
+\begtt
+\fontfam[LinLibertine]
+\famvardef \fraclig {\setff{+frac}\currvar}
+Compare 1/2 or 1/10 \fraclig to 1/2 or 1/10.
+\endtt
+
+If the used font does not support the given font feature then the font is reloaded
+without warning nor error, silently. The font feature is not activated.
+
+The `onum` font feature (old-style digits) is connected to `\caps` macro for
+Caps+SmallCaps variant in \OpTeX/ font family files. So you need not
+create a new modifier, just use `{\caps`\^`\currvar`` 012345}`.
+
+
+\secc[specff] Special font modifiers
+%---------------------------
+
+Despite the font modifiers declared in the font family file (and dependent on
+the font family), we have following font modifiers (independent of font
+family):
+
+\begtt \catcode`\<=13
+\setfontsize{<sizespec>}    % sets the font size
+\setff{<font feature>}       % adds the font feature
+\setfontcolor{<color>}     % sets font color
+\setletterspace{<number>} % sets letter spacing
+\setwordspace{<scaling>}    % modifies word spacing
+\endtt
+
+The \^`\setfontsize` command is described in the section \ref[setfontsize].
+The \^`\setff` command was described in previous subsection.
+
+\^`\setfontcolor` `{<color>}` specifies the color and the opacity of the text.
+The <color> parameter should be in the hexadecimal format of four bytes
+`<red><green><blue><opacity>`, for example `FF0080FF` means full red, zero
+green, half blue and full opacity. You can use names `red`, `green`, `blue`,
+`yellow`, `cyan`, `magenta`, `white`, `grey`, `lgrey` (without the backslash)
+instead of the hexadecimal specification.
+The empty parameter `<color>` means default black color.
+
+These colors of fonts are implemented using \LuaTeX/ internal font feature. This
+is different approach than using colors in section \ref[colors].
+
+\^`\setletterspace` `{<number>}` specifies the letter spacing of the font. The
+`<number>` is a decimal number without unit. The unit is supposed as 1/100 of
+the font size. I.e. `2.5` means 0.25 pt when the font is at 10 pt size. The
+empty parameter `<number>` means no letter spacing which is the default.
+
+\^`\setwordspace` `{<scaling>}` scales the default interword space (defined in the
+font) and its stretching and shrinking parameters by given `<scaling>`
+factor. For example `\setwordspace{2.5}` multiplies interword space by 2.5.
+
+If you need another font transformations, you can use `\setff`
+with following font features provided by Lua\TeX/:
+
+\begtt
+\setff{embolden=1.5}\rm % font is bolder because outline has nonzero width
+\setff{slant=0.2}\rm    % font is slanted by a linear transformation
+\setff{extend=1.2}\rm   % font is extended by a linear transformation.
+\setff{colr=yes}\rm     % if the font includes colored characters, use colors
+\setff{upper}\rm        % to uppercase (lower=lowecase) conversion at font level
+\endtt
+
+Use font transformations mentioned above and \^`\setletterspace`,
+\^`\setwordspace` with care. The best setting of these values is the default
+setting in every font, of course. If you really need to set a different
+letter spacing then it is strongly recommended to add `\setff{-liga}`
+to disable ligatures. And setting a positive letter spacing probably
+needs to scale interword spacing too.
+
+All mentioned font modifiers (except for `\setfontsize`) work only
+with Unicode fonts loaded by \^`\fontfam`.
+
+\secc[fontfamfiles] How to create the font family file
+%------------------------------------------------------
+
+\printdoctail f-heros.opm
+
+\printdoctail f-lmfonts.opm
+
+\secc How to register the font family in the Font Selection System
+%---------------------------------------------------------------
+
+\printdoctail fams-ini.opm
+
+\secc[exfont] Notices about extension of `\font` primitive
+%---------------------------------------------------------
+
+Unicode fonts are loaded by extended `\font` primitive. This extension is
+not activated in \OpTeX/ by default, \^`\initunifonts` macro activates it.
+You need not use \^`\initunifonts` explicitly if \^`\fontfam` macro is
+used because \^`\fontfam` runs it internally.
+
+The \^`\initunifonts` loads the Lua code from the Luaotfload package which
+implements the `\font` primitive extension. See its
+documentation `luaotfload-latex.pdf` for information about
+all possibilities of extended `\font` primitive.
+
+The \OpTeX/ format is initialized by `luatex` engine by default but
+you can initialize it by `luahbtex` engine too. Then the harfbuzz library is
+ready to use for font rendering as an alternative to build-in font renderer
+from Luaotfload. The harfbuzz library gives more features for rendering
+Indic and Arabic scripts. But it is not used as default, you need to specify
+`mode=harf` in the fontfeatures field when `\font` is used. Moreover, when
+`mode=harf` is used, then you must specify `script` too. For example
+
+\begtt
+\font\devafont=[NotoSansDevanagari-Regular]:mode=harf;script=dev2
+\endtt
+%
+If the `luahbtex` engine is not used then `mode=harf` is ignored. See
+Luaotfload documentation for more information.
+
+\endinput
+
+2021-02-25  \_ttunifont introduced
+2021-01-27  lua hack (print function) removed because luaotfload 3.17 removes bug.
+2020-12-12  \_modlist added, doc improved
+2020-04-18  \_tryloadfamslocal introduced
+            \_fontdecl -> \_famdecl with different concept
+2020-03-18  released
diff --git a/Master/texmf-dist/tex/optex/base/graphics.opm b/Master/texmf-dist/tex/optex/base/graphics.opm
new file mode 100644
index 00000000000..afff1c12843
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/graphics.opm
@@ -0,0 +1,445 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \inspic {Graphics <2020-04-12>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\inspic` accepts old syntax `\inspic <filename><space>`
+   or new syntax `\inspic{<filename>}`. So, we need to define
+   two auxiliary macros \`\_inspicA` and \`\_inspicB`.
+
+   You can include more `\pdfximage` parameters (like `page<number>`)
+   in the \`\_picparams` macro.
+
+   All `\inspic` macros are surrounded in `\hbox` in order user can
+   write `\moveright\inspic ...` or something similar.
+   \_cod -----------------------------
+
+\_def\_inspic{\_hbox\_bgroup\_isnextchar\_bgroup\_inspicB\_inspicA}
+\_def\_inspicA #1 {\_inspicB {#1}}
+\_def\_inspicB #1{%
+   \_pdfximage \_ifdim\_picwidth=\_zo  \_else width\_picwidth\_fi
+               \_ifdim\_picheight=\_zo \_else height\_picheight\_fi
+               \_picparams {\_the\_picdir#1}%
+   \_pdfrefximage\_pdflastximage\_egroup}
+
+\_def\_picparams{}
+
+\_public \inspic ;
+
+   \_doc -----------------------------
+   Inkscape can save a picture to `*.pdf` file and labels for the picture
+   to `*.pdf_tex` file. The second file is in \LaTeX/ format (unfortunately)
+   and it is intended to read immediately after `*.pdf` is included
+   in order to place labels of this picture in the same font as the document is printed.
+   We need to read this \LaTeX/ file by plain \TeX/ macros when \`\inkinspic` is used.
+   These macros are stored in the \`\_inkdefs` tokens list and it is used
+   locally in the group. The solution is borrowed from OPmac trick 0032.
+   \_cod -----------------------------
+
+\_def\_inkinspic{\_hbox\_bgroup\_isnextchar\_bgroup\_inkinspicB\_inkinspicA}
+\_def\_inkinspicA #1 {\_inkinspicB {#1}}
+\_def\_inkinspicB #1{%
+  \_ifdim\_picwidth=0pt \_setbox0=\_hbox{\_inspic{#1}}\_picwidth=\_wd0 \_fi
+  \_the\_inkdefs
+  \_opinput {\_the\_picdir #1_tex}% file with labels
+  \_egroup}
+
+\_newtoks\_inkdefs  \_inkdefs={%
+  \_def\makeatletter#1\makeatother{}%
+  \_def\includegraphics[#1]#2{\_inkscanpage#1,page=,\_end \_inspic{#2}\_hss}%
+  \_def\_inkscanpage#1page=#2,#3\_end{\_ifx,#2,\_else\_def\_picparams{page#2}\_fi}%
+  \_def\put(#1,#2)#3{\_nointerlineskip\_vbox to\_zo{\_vss\_hbox to\_zo{\_kern#1\_picwidth
+      \_pdfsave\_hbox to\_zo{#3}\_pdfrestore\_hss}\_kern#2\_picwidth}}%
+  \_def\begin#1{\_csname _begin#1\_endcsname}%
+  \_def\_beginpicture(#1,#2){\_vbox\_bgroup
+      \_hbox to\_picwidth{}\_kern#2\_picwidth \_def\end##1{\_egroup}}%
+  \_def\_begintabular[#1]#2#3\end#4{%
+      \_vtop{\_def\\{\_cr}\_tabiteml{}\_tabitemr{}\_table{#2}{#3}}}%
+  \_def\color[#1]#2{\_scancolor #2,}%
+  \_def\_scancolor#1,#2,#3,{\_pdfliteral{#1 #2 #3 rg}}%
+  \_def\makebox(#1)[#2]#3{\_hbox to\_zo{\_csname _mbx:#2\_endcsname{#3}}}%
+  \_sdef{_mbx:lb}#1{#1\_hss}\_sdef{_mbx:rb}#1{\_hss#1}\_sdef{_mbx:b}#1{\_hss#1\_hss}%
+  \_sdef{_mbx:lt}#1{#1\_hss}\_sdef{_mbx:rt}#1{\_hss#1}\_sdef{_mbx:t}#1{\_hss#1\_hss}%
+  \_def\rotatebox#1#2{\_pdfrotate{#1}#2}%
+  \_def\lineheight#1{}%
+  \_def\setlength#1#2{}%
+}
+\_public \inkinspic ;
+
+   \_doc ----------------------------
+   \`\pdfscale``{<x-scale>}{<y-scale>}` and \`\pdfrotate``{<degrees>}`
+   macros are implemented by `\pdfsetmatrix`
+   primitive. We need to know the values of sin, cos function in
+   the `\pdfrotate`. We use Lua code for this.
+   \_cod ----------------------------
+
+\_def\_pdfscale#1#2{\_pdfsetmatrix{#1 0 0 #2}}
+
+\_def\_gonfunc#1#2{%
+   \_directlua{tex.print(string.format('\_pcent.4f',math.#1(3.14159265*(#2)/180)))}%
+}
+\_def\_sin{\_gonfunc{sin}}
+\_def\_cos{\_gonfunc{cos}}
+
+\_def\_pdfrotate#1{\_pdfsetmatrix{\_cos{#1} \_sin{#1} \_sin{(#1)-180} \_cos{#1}}}
+
+\_public \pdfscale \pdfrotate ;
+
+   \_doc -----------------------------
+   The \`\transformbox``{<transformation>}{<text>}`
+   is copied from OPmac trick 0046.\nl
+   The \`\rotbox``{<degrees>}{<text>}` is a combination of
+   `\rotsimple` from OPmac trick 0101 and the `\transformbox`.
+   Note, that `\rotbox{-90}` puts the rotated text to the height of the outer
+   box (depth is zero) because code from `\rotsimple` is processed.
+   But `\rotbox{-90.0}` puts the rotated text to
+   the depth of the outer box (height is zero) because `\transformbox` is
+   processed.
+   \_cod -----------------------------
+
+\_def\_multiplyMxV #1 #2 #3 #4 {% matrix * (vvalX, vvalY)
+   \_tmpdim = #1\_vvalX \_advance\_tmpdim by #3\_vvalY
+   \_vvalY  = #4\_vvalY \_advance\_vvalY  by #2\_vvalX
+   \_vvalX = \_tmpdim
+}
+\_def\_multiplyMxM #1 #2 #3 #4 {% currmatrix := currmatrix * matrix
+   \_vvalX=#1pt \_vvalY=#2pt \_ea\_multiplyMxV \_currmatrix
+   \_edef\_tmpb{\_ea\_ignorept\_the\_vvalX\_space \_ea\_ignorept\_the\_vvalY}%
+   \_vvalX=#3pt \_vvalY=#4pt \_ea\_multiplyMxV \_currmatrix
+   \_edef\_currmatrix{\_tmpb\_space
+      \_ea\_ignorept\_the\_vvalX\_space \_ea\_ignorept\_the\_vvalY\_space}%
+}
+\_def\_transformbox#1#2{\_hbox{\_setbox0=\_hbox{{#2}}%
+   \_dimendef\_vvalX 11 \_dimendef\_vvalY 12 % we use these variables
+   \_dimendef\_newHt 13 \_dimendef\_newDp 14 % only in this group
+   \_dimendef\_newLt 15 \_dimendef\_newRt 16
+   \_preptransform{#1}%
+   \_kern-\_newLt \_vrule height\_newHt depth\_newDp width\_zo
+   \_setbox0=\_hbox{\_box0}\_ht0=\_zo \_dp0=\_zo
+   \_pdfsave#1\_rlap{\_box0}\_pdfrestore \_kern\_newRt}%
+}
+\_def\_preptransform #1{\_def\_currmatrix{1 0 0 1 }%
+   \_def\_pdfsetmatrix##1{\_edef\_tmpb{##1 }\_ea\_multiplyMxM \_tmpb\_unskip}%
+   \_let\pdfsetmatrix=\_pdfsetmatrix #1%
+   \_setnewHtDp 0pt  \_ht0  \_setnewHtDp 0pt  -\_dp0
+   \_setnewHtDp \_wd0 \_ht0  \_setnewHtDp \_wd0 -\_dp0
+   \_protected\_def \_pdfsetmatrix {\_pdfextension setmatrix}%
+   \_let\pdfsetmatrix=\_pdfsetmatrix
+}
+\_def\_setnewHtDp #1 #2 {%
+   \_vvalX=#1\_relax \_vvalY=#2\_relax \_ea\_multiplyMxV \_currmatrix
+   \_ifdim\_vvalX<\_newLt \_newLt=\_vvalX \_fi \_ifdim\_vvalX>\_newRt \_newRt=\_vvalX \_fi
+   \_ifdim\_vvalY>\_newHt \_newHt=\_vvalY \_fi \_ifdim-\_vvalY>\_newDp \_newDp=-\_vvalY \_fi
+}
+
+\_def\_rotbox#1#2{%
+   \_isequal{90}{#1}\_iftrue \_rotboxA{#1}{\_kern\_ht0 \_tmpdim=\_dp0}{\_vfill}{#2}%
+   \_else \_isequal{-90}{#1}\_iftrue \_rotboxA{#1}{\_kern\_dp0 \_tmpdim=\_ht0}{}{#2}%
+   \_else \_transformbox{\_pdfrotate{#1}}{#2}%
+   \_fi \_fi
+}
+\_def\_rotboxA #1#2#3#4{\_hbox{\_setbox0=\_hbox{{#4}}#2%
+   \_vbox to\_wd0{#3\_wd0=\_zo \_dp0=\_zo \_ht0=\_zo
+                  \_pdfsave\_pdfrotate{#1}\_box0\_pdfrestore\vfil}%
+   \_kern\_tmpdim
+}}
+\_public \transformbox \rotbox ;
+
+   \_doc ---------------------------
+   \`\_scantwodimens` scans two objects with the syntactic rule `<dimen>`
+   and returns `{<number>}{<number>}` in `sp` unit.
+   \nl
+   \`\puttext` `<right> <up>{<text>}` puts the `<text>` to desired place:
+   From current point moves <down> and <right>, puts the <text> and returns
+   back. The current point is unchanged after this macro ends.
+   \nl
+   \`\putpic` `<right> <up> <width> <height> {<image-file>}`
+   does `\puttext` with the image scaled to desired <width> and <height>.
+   If <with> or <height> is zero, natural dimension is used.
+   The \`\nospec` is a shortcut to such a natural dimension.
+   \nl
+   \`\backgroundpic``{<image-file>}` puts the image to
+   the background of each page. It is used in the \~`\slides` style, for example.
+   \_cod ---------------------------
+
+\_def\_scantwodimens{%
+   \_directlua{tex.print(string.format('{\_pcent d}{\_pcent d}',
+               token.scan_dimen(),token.scan_dimen()))}%
+}
+
+\_def\_puttext{\_ea\_ea\_ea\_puttextA\_scantwodimens}
+\_def\_puttextA#1#2#3{{\_setbox0=\_hbox{{#3}}\_dimen1=#1sp \_dimen2=#2sp \_puttextB}}
+\_def\_puttextB{%
+   \_ifvmode
+      \_ifdim\_prevdepth>\_zo \_vskip-\_prevdepth \_relax \_fi
+      \_nointerlineskip
+   \_fi
+   \_wd0=\_zo \_ht0=\_zo \_dp0=\_zo
+   \_vbox to\_zo{\_kern-\_dimen2 \_hbox to\_zo{\_kern\_dimen1 \_box0\_hss}\_vss}}
+
+\_def\_putpic{\_ea\_ea\_ea\_putpicA\_scantwodimens}
+\_def\_putpicA#1#2{\_dimen1=#1sp \_dimen2=#2sp \_ea\_ea\_ea\_putpicB\_scantwodimens}
+\_def\_putpicB#1#2#3{{\_setbox0=\_hbox{\_picwidth=#1sp \_picheight=#2sp \_inspic{#3}}\_puttextB}}
+
+\_newbox\_bgbox
+\_def\_backgroundpic#1{%
+   \_setbox\_bgbox=\_hbox{\_picwidth=\_pdfpagewidth \_picheight=\_pdfpageheight \_inspic{#1}}%
+   \_pgbackground={\_copy\_bgbox}
+}
+\_def\nospec{0pt}
+\_public \puttext \putpic \backgroundpic ;
+
+   \_doc -----------------------------
+   \`\_circle``{<x>}{<y>}` creates an ellipse with `<x>` axis and `<y>` axis.
+   The origin is in the center.
+   \nl
+   \`\_oval``{<x>}{<y>}{<roundness>}` creates an oval with `<x>`, `<y>` size and with
+   the given `<roundness>`. The real size is bigger by 2`<roundness>`. The
+   origin is at the left bottom corner.
+   \nl
+   \`\_mv``{<x>}{<y>}{<curve>}` moves current point to `<x>`, `<y>`, creates the
+   `<curve>` and returns the current point back.
+   All these macros are fully expandable and they can be used in the
+   `\pdfliteral` argument.
+   \_cod -----------------------------
+
+\def\_circle#1#2{\_expr{.5*(#1)} 0 m
+   \_expr{.5*(#1)} \_expr{.276*(#2)} \_expr{.276*(#1)} \_expr{.5*(#2)} 0 \_expr{.5*(#2)} c
+   \_expr{-.276*(#1)} \_expr{.5*(#2)} \_expr{-.5*(#1)} \_expr{.276*(#2)} \_expr{-.5*(#1)} 0 c
+   \_expr{-.5*(#1)} \_expr{-.276*(#2)} \_expr{-.276*(#1)} \_expr{-.5*(#2)} 0 \_expr{-.5*(#2)} c
+   \_expr{.276*(#1)} \_expr{-.5*(#2)} \_expr{.5*(#1)} \_expr{-.276*(#2)} \_expr{.5*(#1)} 0 c h}
+
+\def\_oval#1#2#3{0 \_expr{-(#3)} m \_expr{#1} \_expr{-(#3)} l
+    \_expr{(#1)+.552*(#3)} \_expr{-(#3)} \_expr{(#1)+(#3)} \_expr{-.552*(#3)}
+                                                           \_expr{(#1)+(#3)} 0 c
+    \_expr{(#1)+(#3)} \_expr{#2} l
+    \_expr{(#1)+(#3)} \_expr{(#2)+.552*(#3)} \_expr{(#1)+.552*(#3)} \_expr{(#2)+(#3)}
+                                             \_expr{#1} \_expr{(#2)+(#3)} c
+    0 \_expr{(#2)+(#3)} l
+    \_expr{-.552*(#3)} \_expr{(#2)+(#3)} \_expr{-(#3)} \_expr{(#2)+.552*(#3)}
+                                         \_expr{-(#3)} \_expr{#2} c
+    \_expr{-(#3)} 0 l
+    \_expr{-(#3)} \_expr{-.552*(#3)} \_expr{-.552*(#3)} \_expr{-(#3)}  0 \_expr{-(#3)} c h}
+
+\def\_mv#1#2#3{1 0 0 1 \_expr{#1} \_expr{#2} cm #3 1 0 0 1 \_expr{-(#1)} \_expr{-(#2)} cm}
+
+   \_doc -----------------------------
+   The \`\inoval``{<text>}` is an example of \^`\_oval` usage.\nl
+   The \`\incircle``{<text>}` is an example of \^`\_circle` usage.\nl
+   The \`\ratio`, \`\lwidth`, \`\fcolor`, \`\lcolor`, \`\shadow` and \`\overlapmargins`
+   are parameters, they can be set by user in optional brackets `[...]`.
+   For example `\fcolor=\Red` does `\_let\_fcolorvalue=\Red` and it means
+   filling color.\nl
+   The \`\_setflcolor` uses the \^`\_fillstroke` macro to separate filling
+   color and drawing color.
+   \_cod -----------------------------
+
+\_newdimen \_lwidth
+\_def\_fcolor{\_let\_fcolorvalue}
+\_def\_lcolor{\_let\_lcolorvalue}
+\_def\_shadow{\_let\_shadowvalue}
+\_def\_overlapmargins{\_let\_overlapmarginsvalue}
+\_def\_ratio{\_isnextchar ={\_ratioA}{\_ratioA=}}
+\_def\_ratioA =#1 {\_def\_ratiovalue{#1}}
+\_def\_touppervalue#1{\_ifx#1n\_let#1=N\_fi}
+
+\_def\_setflcolors#1{% use only in a group
+   \_def\_setcolor##1{##1}%
+   \_def\_fillstroke##1##2{##1}%
+   \_edef#1{\_fcolorvalue}%
+   \_def\_fillstroke##1##2{##2}%
+   \_edef#1{#1\_space\_lcolorvalue\_space}%
+}
+\_optdef\_inoval[]{\_vbox\_bgroup
+   \_roundness=2pt \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp
+   \_shadow=N \_overlapmargins=N \_hhkern=0pt \_vvkern=0pt
+   \_the\_ovalparams \_relax \_the\_opt \_relax
+   \_touppervalue\_overlapmarginsvalue \_touppervalue\_shadowvalue
+   \_ifx\_overlapmarginsvalue N%
+      \_advance\_hsize by-2\_hhkern \_advance\_hsize by-2\_roundness \_fi
+   \_setbox0=\_hbox\_bgroup\_bgroup \_aftergroup\_inovalA \_kern\_hhkern \_let\_next=%
+}
+\_def\_inovalA{\_isnextchar\_colorstackpop\_inovalB\_inovalC}
+\_def\_inovalB#1{#1\_isnextchar\_colorstackpop\_inovalB\_inovalC}
+\_def\_inovalC{\_egroup % of \setbox0=\hbox\bgroup
+   \_ifdim\_vvkern=\_zo \_else \_ht0=\_dimexpr\_ht0+\_vvkern \_relax
+                               \_dp0=\_dimexpr\_dp0+\_vvkern \_relax \_fi
+   \_ifdim\_hhkern=\_zo \_else \_wd0=\_dimexpr\_wd0+\_hhkern \_relax \_fi
+   \_ifx\_overlapmarginsvalue N\_dimen0=\_roundness \_dimen1=\_roundness
+   \_else                      \_dimen0=-\_hhkern   \_dimen1=-\_vvkern \_fi
+   \_setflcolors\_tmp
+   \_hbox{\_kern\_dimen0
+      \_vbox to\_zo{\_kern\_dp0
+         \_ifx\_shadowvalue N\_else
+            \_edef\_tmpb{{\_bp{\_wd0+\_lwidth}}{\_bp{\_ht0+\_dp0+\_lwidth}}{\_bp{\_roundness}}}%
+            \_doshadow\_oval
+         \_fi
+         \_pdfliteral{q \_bp{\_lwidth} w \_tmp
+            \_oval{\_bp{\_wd0}}{\_bp{\_ht0+\_dp0}}{\_bp{\_roundness}} B Q}\_vss}%
+      \_ht0=\_dimexpr\_ht0+\_dimen1 \_relax \_dp0=\_dimexpr\_dp0+\_dimen1 \_relax
+      \_box0
+      \_kern\_dimen0}%
+   \_egroup % of \vbox\bgroup
+}
+\_optdef\_incircle[]{\_vbox\_bgroup
+   \_ratio=1 \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp
+   \_shadow=N \_overlapmargins=N \_hhkern=3pt \_vvkern=3pt
+   \_ea\_the \_ea\_circleparams \_space \_relax
+   \_ea\_the \_ea\_opt \_space \_relax
+   \_touppervalue\_overlapmarginsvalue \_touppervalue\_shadowvalue
+   \_setbox0=\_hbox\_bgroup\_bgroup \_aftergroup\_incircleA \_kern\_hhkern \_let\_next=%
+}
+\_def\_incircleA {\_isnextchar\_colorstackpop\_incircleB\_incircleC}
+\_def\_incircleB #1{#1\_isnextchar\_colorstackpop\_incircleB\_incircleC}
+\_def\_incircleC {\_egroup % of \setbox0=\hbox\bgroup
+   \_wd0=\_dimexpr \_wd0+\_hhkern \_relax
+   \_ht0=\_dimexpr \_ht0+\_vvkern \_relax \_dp0=\_dimexpr \_dp0+\_vvkern \_relax
+   \_ifdim \_ratiovalue\_dimexpr \_ht0+\_dp0 > \_wd0
+          \_dimen3=\_dimexpr \_ht0+\_dp0 \_relax  \_dimen2=\_ratiovalue\_dimen3
+   \_else \_dimen2=\_wd0 \_dimen3=\_expr{1/\_ratiovalue}\_dimen2 \_fi
+   \_setflcolors\_tmp
+   \_ifx\_overlapmarginsvalue N\_dimen0=\_zo \_dimen1=\_zo
+   \_else \_dimen0=-\_hhkern \_dimen1=-\_vvkern \_fi
+   \_hbox{\_kern\_dimen0
+      \_ifx\_shadowvalue N\_else
+         \_edef\_tmpb{{\_bp{\_dimen2+\_lwidth}}{\_bp{\_dimen3+\_lwidth}}{}}%
+         \_doshadow\_circlet
+      \_fi
+      \_pdfliteral{q \_bp{\_lwidth} w \_tmp \_mv{\_bp{.5\_wd0}}{\_bp{(\_ht0-\_dp0)/2}}
+                                      {\_circle{\_bp{\_dimen2}}{\_bp{\_dimen3}} B} Q}%
+      \_ifdim\_dimen1=\_zo \_else
+           \_ht0=\_dimexpr \_ht0+\_dimen1 \_relax \_dp0=\_dimexpr \_dp0+\_dimen1 \_relax \_fi
+      \_box0
+      \_kern\_dimen0}
+   \_egroup % of \vbox\bgroup
+}
+\_def\_circlet#1#2#3{\_circle{#1}{#2}}
+
+\_public \inoval \incircle \ratio \lwidth \fcolor \lcolor \shadow \overlapmargins ;
+
+   \_doc -----------------------------
+   A shadow effect is implemented here. The shadow is equal to the
+   silhouette of the given path in a gray-transparent color shifted by
+   \`\_shadowmoveto` vector and with blurred boundary.
+   A waistline with the width 2*\`\_shadowb` around the boundary is blurred.
+   The \`\shadowlevels` levels of transparent shapes is used for creating
+   this effect. The `\shadowlevels+1/2` level is equal to the shifted given path.
+   \_cod -----------------------------
+
+\_def\_shadowlevels{9}         % number of layers for blurr effect
+\_def\_shadowdarknessA{0.025}  % transparency of first shadowlevels/2 layers
+\_def\_shadowdarknessB{0.07}   % transparency of second half of layers
+\_def\_shadowmoveto{1.8 -2.5}  % vector defines shifting layer (in bp)
+\_def\_shadowb{1}              % 2*shadowb = blurring area thickness
+
+   \_doc -----------------------------
+   The `\_pdfpageresources` primitive is used to define transparency.
+   It does not work when used in a box. So, we use it at the beginning of
+   the output routine. The modification of the output routine is done
+   using \`\_insertshadowresources` only once when the shadow effect is used first.
+   \_cod -----------------------------
+
+\_def\_insertshadowresources{%
+   \_global\_addto\_begoutput{\_setshadowresources}%
+   \_xdef\_setshadowresources{%
+      \_pdfpageresources{/ExtGState
+      <<
+      /op1  <</Type /ExtGState /ca \_shadowdarknessA>>
+      /op2  <</Type /ExtGState /ca \_shadowdarknessB>>
+      \_morepgresources
+      >>
+      }%
+   }%
+   \_global\_let\_insertshadowresources=\_relax
+}
+\_def\_morepgresources{}
+
+   \_doc -----------------------------
+   The \`\_doshadow``{<curve>}` does the shadow effect.
+   \_cod -----------------------------
+
+\_def\_doshadow#1{\_vbox{%
+    \_insertshadowresources
+    \_tmpnum=\_numexpr (\_shadowlevels-1)/2 \_relax
+    \_edef\_tmpfin{\_the\_tmpnum}%
+    \_ifnum\_tmpfin=0 \_def\_shadowb{0}\_def\_shadowstep{0}%
+    \_else \_edef\_shadowstep{\_expr{\_shadowb/\_tmpfin}}\_fi
+    \_def\_tmpa##1##2##3{\_def\_tmpb
+        {#1{##1+2*\_the\_tmpnum*\_shadowstep}{##2+2*\_the\_tmpnum*\_shadowstep}{##3}}}%
+    \_ea \_tmpa \_tmpb
+    \_def\_shadowlayer{%
+        \_ifnum\_tmpnum=0 /op2 gs \_fi
+        \_tmpb\_space f
+        \_immediateassignment\_advance\_tmpnum by-1
+        \_ifnum-\_tmpfin<\_tmpnum
+           \_ifx#1\_oval 1 0 0 1 \_shadowstep\_space \_shadowstep\_space cm \_fi
+           \_ea \_shadowlayer \_fi
+    }%
+    \_pdfliteral{q /op1 gs 0 g 1 0 0 1 \_shadowmoveto\_space cm
+       \_ifx#1\_circlet 1 0 0 1 \_expr{\_bp{.5\_wd0}} \_expr{\_bp{(\_ht0-\_dp0)/2}} cm
+       \_else  1 0 0 1 -\_shadowb\_space -\_shadowb\_space cm \_fi
+       \_shadowlayer Q}
+}}
+
+   \_doc -----------------------------
+   A generic macro \`\_clipinpath``<x> <y> <curve> <text>` declares
+   a clipping path by the `<curve>` shifted by the `<x>`, `<y>`. The `<text>` is typeset
+   when such clipping path is active. Dimensions are given by bp without the unit here.
+   The macros \`\clipinoval` `<x> <y> <width> <height> {<text>}` and
+   \`\clipincircle` `<x> <y> <width> <height> {<text>}` are defined here.
+   These macros read normal \TeX/ dimensions in their parameters.
+   \_cod -----------------------------
+
+\_def\_clipinpath#1#2#3#4{% #1=x-pos[bp], #2=y-pos[bp], #3=curve, #4=text
+   \_hbox{\_setbox0=\_hbox{{#4}}%
+          \_tmpdim=\_wd0 \_wd0=\_zo
+          \_pdfliteral{q \_mv{#1}{#2}{#3 W n}}%
+          \_box0\_pdfliteral{Q}\_kern\_tmpdim
+   }%
+}
+
+\_def\_clipinoval {\_ea\_ea\_ea\_clipinovalA\_scantwodimens}
+\_def\_clipinovalA #1#2{%
+   \_def\_tmp{{#1/65781.76}{#2/65781.76}}%
+   \_ea\_ea\_ea\_clipinovalB\_scantwodimens
+}
+\_def\_clipinovalB{\_ea\_clipinovalC\_tmp}
+\_def\_clipinovalC#1#2#3#4{%
+   \_ea\_clipinpath{#1-(#3/131563.52)+(\_bp{\_roundness})}{#2-(#4/131563.52)+(\_bp{\_roundness})}%
+   {\_oval{#3/65781.76-(\_bp{2\_roundness})}{#4/65781.76-(\_bp{2\_roundness})}{\_bp{\_roundness}}}%
+}
+\_def\_clipincircle {\_ea\_ea\_ea\_clipincircleA\_scantwodimens}
+\_def\_clipincircleA #1#2{%
+   \_def\_tmp{{#1/65781.76}{#2/65781.76}}%
+   \_ea\_ea\_ea\_clipincircleB\_scantwodimens
+}
+\_def\_clipincircleB#1#2{%
+   \_ea\_clipinpath\_tmp{\_circle{#1/65781.76}{#2/65781.76}}%
+}
+\_public \clipinoval \clipincircle ;
+
+
+\_endcode % -------------------------------------
+
+The \^`\inspic` is defined by `\pdfximage` and `\pdfrefximage` primitives.
+If you want to use one picture more than once in your document, then the
+following code is recommended:
+\begtt \catcode`\<=13
+\newbox\mypic
+\setbox\mypic = \hbox{\picw=3cm \inspic{<picture>}}
+
+My picture: \copy\mypic, again my picture: \copy\mypic, etc.
+\endtt
+This code downloads the picture data to the PFD output only once (when
+`\setbox` is processed). Each usage of `\copy\mypic` puts only a pointer to
+the picture data in the PDF.
+
+If you want to copy the same picture in different sizes, then choose
+a \"basic size" used in `\setbox` and all different sizes can be realized by
+the \^`\transformbox{<transformation>}{\copy\mypic}`.
+
+\_endinput
+
+2020-12-21: \puttext: \box0 in goup, bugfix
+2020-04-12: \_public \clipinoval \clipincircle ; added, bug fixed
+
diff --git a/Master/texmf-dist/tex/optex/base/hi-syntax.opm b/Master/texmf-dist/tex/optex/base/hi-syntax.opm
new file mode 100644
index 00000000000..eb6d747914e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hi-syntax.opm
@@ -0,0 +1,223 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \hisyntax {Syntax highlithing of verbatim listings <2020-04-04>} % preloaded in format
+
+   \_doc -----------------------------
+   The following macros `\replfromto` and `\replthis` manipulate with the
+   verbatim text which has been read already and stored in the `\_tmpb` macro.
+
+   The \`\replfromto` `{<from>}{<to>}{<what>}` finds first `<from>` then the
+   first `<to>` following by `<from>` pattern and the
+   `<text>` between them is packed to `#1`.
+   Then `<from><text><to>` is replaced by `<what>`. The `<what>` parameter
+   can use `#1` which is replaced by the `<text>`.
+
+   The `\replfromto` continues by finding next `<from>`, then, next `<to>`
+   repeatedly over the whole verbatim text. If the verbatim text is ended by
+   opened `<from>` but not closing by `<to>` then `<to>` is appended to the
+   verbatim text automatically and the last part of the verbatim text is replaced too.
+
+   First two parameters are expanded before usage of `\replfromto`. You can
+   use `\csstring\%` or something else here.
+   \_cod -----------------------------
+
+\_def\_replfromto #1#2{\_edef\_tmpa{{#1}{#2}}\_ea\_replfromtoE\_tmpa}
+\_def\_replfromtoE#1#2#3{% #1=from #2=to #3=what to replace
+   \_def\_replfrom##1#1##2{\_addto\_tmpb{##1}%
+      \_ifx\_end##2\_ea\_replstop \_else \_afterfi{\_replto##2}\_fi}%
+   \_def\_replto##1#2##2{%
+      \_ifx\_end##2\_afterfi{\_replfin##1}\_else
+        \_addto\_tmpb{#3}%
+        \_afterfi{\_replfrom##2}\_fi}%
+   \_def\_replfin##1#1\_end{\_addto\_tmpb{#3}\_replstop}%
+   \_edef\_tmpb{\_ea}\_ea\_replfrom\_tmpb#1\_end#2\_end\_end\_relax
+}
+\_def\_replstop#1\_end\_relax{}
+\_def\_finrepl{}
+
+   \_doc -----------------------------
+   The \`\replthis` `{<pattern>}{<what>}` replaces each `<pattern>` by `<what>`.
+   Both parameters of `\replthis` are expanded first.
+   \_cod -----------------------------
+
+\_def\_replthis#1#2{\_edef\_tmpa{{#1}{#2}}\_ea\_replstring\_ea\_tmpb \_tmpa}
+
+\_public \replfromto \replthis ;
+
+   \_doc -----------------------------
+   The patterns `<from>`, `<to>` and `<pattern>` are not found when they are
+   hidden in braces `{...}`. Example:
+   \begtt
+   \replfromto{/*}{*/}{\x C{/*#1/*}}
+   \endtt
+   replaces all C comments by `\x C{...}`. The patterns inside `{...}` are
+   not used by next usage of `\replfromto` or `\replthis` macros.
+
+   The \`\_xscan` macro does replacing `\x` by `\z` in the post-processing
+   phase. The `\x <letter>{<text>}` expands to  `\_xscan {<letter>}<text>^^J^`.
+   If `#3` is `\_end` then it signals that something wrong happens, the
+   `<from>` was not terminated by legal `<to>` when `\replfromto` did work.
+   We must to fix it by the \`\_xscanR` macro.
+   \_cod -----------------------------
+
+\_def\_xscan#1#2^^J#3{\_ifx\_end#3 \_ea\_xscanR\_fi
+   \z{#1}{#2}%
+   \_ifx^#3\_else ^^J\_afterfi{\_xscan{#1}#3}\_fi}
+\_def\_xscanR#1\_fi#2^{^^J}
+
+   \_doc -----------------------------
+   The \`\hicolor` `<letter> <color>` defines `\_z<letter>{<text>}`
+   as `{<color><text>}`. It should be used in the context of
+   `\x <letter>{<text>}` macros.
+   \_cod -----------------------------
+
+\_def\_hicolor #1#2{\_sdef{_z:#1}##1{{#2##1}}}
+
+   \_doc -----------------------------
+   The \`\hisyntax``{<name>}` re-defines default \^`\_prepareverbdata``<macro><verbtext>`
+   in order to it does more things:
+   It saves `<verbtext>` to `\_tmpb`, appends `\n` around spaces and
+   `^^J` characters in pre-processing phase, it opens `hisyntax-<name>.opm`
+   file if `\_hisyntax<name>` is not defined. Then `\_the\_isyntax<name>`
+   is processed. Finally, the post-processing phase is realized by setting
+   appropriate values to `\x` and `\y` macros and doing
+   `\_edef\_tmpb{\_tmpb}`.
+   \_cod -----------------------------
+
+\_def\_hisyntax#1{\_def\_prepareverbdata##1##2{%
+   \_let\n=\_relax \_let\b=\_relax \_def\t{\n\_noexpand\t\n}\_let\_start=\_relax
+   \_adef{ }{\n\_noexpand\ \n}\_edef\_tmpb{\_start^^J##2\_end}%
+   \_replthis{^^J}{\n^^J\b\n}\_replthis{\b\n\_end}{\_end}%
+   \_let\x=\_relax  \_let\y=\_relax \_let\z=\_relax \_let\t=\_relax
+   \_hicomments % keeps comments declared by \commentchars
+   \_endlinechar=`\^^M
+   \_lowercase{\_def\_tmpa{#1}}%
+   \_ifcsname _hialias:\_tmpa\_endcsname \_edef\_tmpa{\_cs{_hialias:\_tmpa}}\_fi
+   \_ifx\_tmpa\_empty \_else
+      \_unless \_ifcsname _hisyntax\_tmpa\_endcsname
+          \_isfile{hisyntax-\_tmpa.opm}\_iftrue \_opinput {hisyntax-\_tmpa.opm} \_fi\_fi
+      \_ifcsname _hisyntax\_tmpa\_endcsname
+          \_ifcsname hicolors\_tmpa\_endcsname
+              \_cs{_hicolors\_tmpa}=\_cs{hicolors\_tmpa}%
+          \_else
+              \_if^\_the\_hicolors^\_else
+                  \_ifcsname _hicolors\_tmpa\_endcsname
+                      \_global\_cs{_hicolors\_tmpa}=\_hicolors \_global\_hicolors={}%
+          \_fi\_fi\_fi
+          \_ea\_the \_csname _hisyntax\_tmpa\_endcsname % \_the\_hisyntax<name>
+      \_else\_opwarning{Syntax "\_tmpa" undeclared (no file hisyntax-\_tmpa.opm)}
+   \_fi\_fi
+   \_replthis{\_start\n^^J}{}\_replthis{^^J\_end}{^^J}%
+   \_def\n{}\_def\b{}\_adef{ }{\_dsp}%
+   \_bgroup \_lccode`\~=`\ \_lowercase{\_egroup\_def\ {\_noexpand~}}%
+   \_def\w####1{####1}\_def\x####1####2{\_xscan{####1}####2^^J^}%
+   \_def\y####1{\_ea \_noexpand \_csname ####1\_endcsname}%
+   \_edef\_tmpb{\_tmpb}%
+   \_def\z####1{\_cs{_z:####1}}%
+   \_def\t{\_hskip \_dimexpr\_tabspaces em/2\_relax}%
+   \_localcolor
+}}
+\_public \hisyntax \hicolor ;
+
+   \_doc -----------------------------
+   Aliases for languages can be declared like this.
+   When `\hisyntax{xml}` is used then this is the same as `\hisyntax{html}`.
+   \_cod -----------------------------
+
+\_sdef{_hialias:xml}{html}
+\_sdef{_hialias:json}{c}
+
+\_endcode % -------------------------------------------
+
+The user can write
+
+\begtt \adef/{\_csstring\\}
+\begtt \hisytnax{C}
+...
+/endtt
+\endtt
+and the code is colorized by C syntax.
+The user can write `\everytt={\hisyntax{C}}` and all verbatim listings are
+colorized.
+
+The \^`\hisyntax``{<name>}` reads the file `hisyntax-<name>.opm` where the
+colorization is declared. The parameter `<name>` is case insensitive and the
+file name must include it in lowercase letters. For example, the file
+`hisyntax-c.opm` looks like this:
+
+\printdoc hisyntax-c.opm
+
+\OpTeX/ provides `hisyntax-{c,python,tex,html}.opm` files.
+You can take inspiration from these files and declare more languages.
+
+User can re-declare colors by `\hicolors={...}` This value has precedence
+before `\_hicolors<name>` values declared in the `hicolors-<name>.opm` file.
+What exactly to do: copy `\_hicolors<name>={...}`
+from `hicolors-<name>.opm` to your document,
+rename it as `\hicolors={...}` and do you own colors modifications.
+
+Another way to set non-default colors is to declare
+`\newtoks\hicolors<name>` (without the `_` prefix) and set the colors palette here.
+It has precedence before `\_hicolors<name>` (with the `_` prefix) declared in
+the `hicolors-<name>.opm` file.
+This is useful when there are more hi-syntax languages used in one document.
+
+\secl4 Notes for hi-syntax macro writers
+The file `hisyntax-<name>.opm` is read only once in the \TeX/ group.
+If there are definitions then they must be declared as global.
+
+The `hisyntax-<name>.opm` file must (globally) declare `\_hisyntax<name>` tokens string
+where the action over verbatim text is declared typically by `\replfromto` or
+`\replthis` macros.
+
+The verbatim text is prepared by {\em pre-processing phase}, then the
+`\_hisyntax<name>` is applied and then {\em post-processing phase} does final
+corrections. Finally, the verbatim text is printed line by line.
+
+The pre-processing phase does:
+
+\begitems
+* Each space is replaced by {\visiblesp`\n\ \n`}, so `\n<word>\n` should be a pattern to
+  finding whole words (no subwords). The `\n` control sequence is removed in
+  the post-processing phase.
+* Each end of line is represented by `\n^^J\n`.
+* The `\_start` control sequence is added before the verbatim text and the `\_end` control
+  sequence is appended to the end of the verbatim text. These control
+  sequences are removed in the post-processing phase.
+\enditems
+
+Special macros are working only in a group when processing the verbatim
+text.
+
+
+\begitems
+* `\n` means noting but it should be used as a boundary of words as mentioned above.
+* `\t` means a tabulator. It is prepared as `\n\t\n` because it can be at
+  the boundary of a word.
+* `\x <letter>{<text>}` can be used as replacing text. Suppose the example
+  \begtt
+  \replfromto{/*}{*/}{\x C{/*#1*/}}
+  \endtt
+  This replaces all C comments `/*...*/` by `\x C{/*...*/}`. But the
+  C comments may span more lines, i.e. the `^^J` should be inside it.
+
+  The macro `\x <letter>{<text>}` is replaced by one or more
+  `\z <letter>{<text>}` in post-processing phase where each parameter `<text>` of
+  `\z` keeps inside one line. Inside-line parameters are represented
+  by `\x C{<text>}` and they are replaced to `\z C{<text>}` without any change.
+  But:
+  \begtt \catcode`\<=13
+  \x C{<text1>^^J<text3>^^J<text3>}
+  is replaced by
+  \z C{<text1>}^^J\z C{<text2>}^^J\z C{<text3>}
+  \endtt
+  The `\z <letter>{<text>}` is expanded to `\_z:<letter>{<text>}` and if
+  `\hicolor <letter> <color>` is declared then
+  `\_z:<letter>{<text>}` expands to `{<color><text>}`. So, required color is
+  activated at all lines (separately) where C comment spans.
+* `\y {<text>}` is replaced by `\<text>` in the post processing phase. It should
+  be used for macros without a parameter. You cannot use unprotected macros
+  as replacement text before the post-processing phase, because the post-processing
+  phase is based on expansion whole verbatim text.
+\enditems
+
diff --git a/Master/texmf-dist/tex/optex/base/hisyntax-c.opm b/Master/texmf-dist/tex/optex/base/hisyntax-c.opm
new file mode 100644
index 00000000000..3c1f228f88c
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hisyntax-c.opm
@@ -0,0 +1,66 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_hisyntaxc {Syntax highlighting for C sources <2020-04-03>}
+
+\_newtoks \_hisyntaxc  \_newtoks \_hicolorsc
+
+\_global\_hicolorsc={%     colors for C language
+   \_hicolor K \Red      % Keywords
+   \_hicolor S \Magenta  % Strings
+   \_hicolor C \Green    % Comments
+   \_hicolor N \Cyan     % Numbers
+   \_hicolor P \Blue     % Preprocessor
+   \_hicolor O \Blue     % Non-letters
+}
+\_global\_hisyntaxc={%
+   \_the\_hicolorsc
+   \_let\c=\_relax \_let\e=\_relax \_let\o=\_relax
+   \_replfromto {/*}{*/}         {\x C{/*#1*/}}%   /*...*/
+   \_replfromto {//}{^^J}        {\z C{//#1}^^J}%  //...
+   \_replfromto {\_string#}{^^J} {\z P{\##1}^^J}%  #include ...
+   \_replthis   {\_string\"}     {{\_string\"}}%   \" protected inside strings
+   \_replfromto {"}{"}           {\x S{"#1"}}%     "..."
+   %
+   \_edef\_tmpa {()\_string{\_string}+-*/=[]<>,:;\_pcent\_string&\_string^|!?}% non-letters
+   \_ea \_foreach \_tmpa
+      \_do {\_replthis{#1}{\n\o#1\n}}
+   \_foreach                                                              % keywords
+      {auto}{break}{case}{char}{continue}{default}{do}{double}%
+      {else}{entry}{enum}{extern}{float}{for}{goto}{if}{int}{long}{register}%
+      {return}{short}{sizeof}{static}{struct}{switch}{typedef}{union}%
+      {unsigned}{void}{while}
+      \_do {\_replthis{\n#1\n}{\z K{#1}}}
+   \_replthis{.}{\n.\n}                                                   % numbers
+   \_foreach 0123456789
+      \_do {\_replfromto{\n#1}{\n}{\c#1##1\e}}
+   \_replthis{\e.\c}{.}
+   \_replthis{\e.\n}{.\e}
+   \_replthis{\n.\c}{\c.}
+   \_replthis{e\e\o+\c}{e+}\_replthis{e\e\o-\c}{e-}
+   \_replthis{E\e\o+\c}{E+}\_replthis{E\e\o-\c}{E-}
+   \_def\o#1{\z O{#1}}
+   \_def\c#1\e{\z N{#1}}
+}
+
+\_endcode %------------------------------------------------
+
+
+Each `hisyntax-<name>.opm` file must declare the token list
+`\_hisyntax<name>` using `\newtoks` and must declare the syntax declaration
+in it. The second token list `\_hicolors<name>` is optional but recommended.
+User can re-declare his/her own colors by `\hicolors` which has precedence
+before `\_hicolors<name>`.
+
+The public variants can be declared if you want to give these token lists to
+the user namespace. But it is not explicitly needed.
+
+All settings must be global here because the file is typically read inside
+a group and we need not read it repeatedly before each code chunk
+again and again.
+
+Note that `\foreach` is used for each non-letters (expanded via \string
+because we needn't treat with active or special TeX characters). The
+keyword is applied in the `\foreach` loop too.
+
+See `hi-sytax.opm` for more information about `\hicolor`, `\replfromto` and
+`\replthis` macros.
diff --git a/Master/texmf-dist/tex/optex/base/hisyntax-html.opm b/Master/texmf-dist/tex/optex/base/hisyntax-html.opm
new file mode 100644
index 00000000000..3f0be6a23e8
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hisyntax-html.opm
@@ -0,0 +1,31 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl\_hisyntaxhtml {Syntax highlighting for html or xml sources <2020-04-03>} 
+
+\_newtoks\_hisyntaxhtml  \_newtoks\_hicolorshtml
+
+\_global\_hicolorshtml={%  colors in html codes 
+   \_hicolor A \Cyan    % <, > and parameters 
+   \_hicolor T \Red     % tag names
+   \_hicolor C \Green   % comments
+   \_hicolor E \Blue    % HTML entities
+   \_hicolor S \Magenta % strings in parameters
+}
+\_global\_hisyntaxhtml={
+   \_the\_hicolorshtml
+   \_replfromto{<!--}{-->}{\x C{<!--#1-->}}
+   \_replthis{<}{\y{_hitaghtml}}
+   \_replthis{\_string&}{\y{_hientityhtml}}
+}
+\_gdef\_hitaghtml#1>{\_hitaghtmlA#1\ >}
+\_gdef\_hitaghtmlA#1\ #2>{\z A{<}\z T{#1}\_def\_tmpb{#2^}%
+  \_if^\_tmpb 
+  \_else \_space 
+      \_replthis{\ ^}{}\_replfromto{"}{"}{\_histringhtml{"##1"}}\z A{\_tmpb}\_fi
+  \z A{>}%
+}
+\_gdef\_histringhtml#1{\_visiblesp \z S{#1}}
+\_gdef\_hientityhtml#1;{\z E{\&#1;}}
+
+\_endcode %------------------------------------------------
+
diff --git a/Master/texmf-dist/tex/optex/base/hisyntax-python.opm b/Master/texmf-dist/tex/optex/base/hisyntax-python.opm
new file mode 100644
index 00000000000..6250eed0e38
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hisyntax-python.opm
@@ -0,0 +1,82 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_hisyntaxpython {Syntax highlighting for Python sources <2020-04-04>} 
+
+\_newtoks \_hisyntaxpython  \_newtoks \_hicolorspython
+
+\_global\_hicolorspython={% colors for Python language
+   \_hicolor M \Orange    % Multi line strings
+   \_hicolor S {\_visiblesp \Grey} % Single line strings
+   \_hicolor C \Green     % Comments
+   \_hicolor K \LightBlue % Keywords
+   \_hicolor O \Blue      % Operators
+   \_hicolor N \Red       % Numbers
+   \_hicolor D \Magenta   % def names
+   \_hicolor L \Black     % class names
+   \_hicolor R \Magenta   % Decorators
+}
+\_global\_hisyntaxpython={%
+   \_the\_hicolorspython
+   \_let\s=\_relax  \_let\c=\_relax \_let\e=\_relax \_let\o=\_relax
+   \_replthis{\_string\"}{{\_string\"}}     % protect \", \'
+   \_replthis{\_string\'}{{\_string\'}}
+   %
+   \_replfromto{\_string#}{^^J}{\z C{\##1}^^J} % comments
+   %
+   \_replthis{'''}{\_noexpand\_hipystr0{'''}M} % search string marks
+   \_replthis{"""}{\_noexpand\_hipystr1{"""}M}
+   \_replthis{"}{\_noexpand\_hipystr2{"}S}
+   \_replthis{'}{\_noexpand\_hipystr3{'}S}
+   \_edef\_tmpb{\_tmpb}                       % realize string marks
+   %
+   \_foreach {br}{Br}{bR}{BR}{rb}{rB}{Rb}{RB}uUrRbB  % string prefixes
+       \_do {\_replthis{#1\s}{\_noexpand\_hipystrpre#1}}
+   \_def\s{}
+   \_edef\_tmpb{\_tmpb}
+   %
+   \_edef \_tmpa {+-*./=<>()[]:,;!|\_pcent   % operators
+        \_string{\_string}@\_string&\_string~\_string^}
+   \_ea\_foreach \_tmpa 
+       \_do {\_replthis{#1}{\n\o#1\n}}
+   %
+   \_foreach                                 % keywords
+      {and}{as}{assert}{async}{await}{break}{continue}{del}{elif}{else}{except}%
+      {exec}{False}{finally}{for}{from}{global}{if}{import}{in}{is}{lambda}{None}% 	
+      {nonlocal}{not}{or}{pass}{print}{raise}{return}{True}{try}{while}{with}{yield}%
+      \_do {\_replthis{\n#1\n}{\z K{#1}}}
+   \_replfromto{\n def\n}{\n\o(\n}{\z K{def}\x D{#1}\n\o(\n}
+   \_replfromto{\n class\n}{\n\o(\n}{\z K{class}\x L{#1}\n\o(\n}
+   %
+   \_foreach 0123456789                       % numbers            
+       \_do {\_replfromto{\n#1}{\n}{\c#1##1\e}}
+   %
+   \_replthis{\e\o.\c}{.}
+   \_replthis{\e\o.\n}{.\e}
+   \_replthis{\n\o.\c}{\c.}
+   \_replthis{e\e\o+\c}{e+}\_replthis{e\e\o-\c}{e-}   
+   \_replthis{E\e\o+\c}{E+}\_replthis{E\e\o-\c}{E-}   
+   \_replthis{\e j}{j\e}
+   %
+   \_replfromto{\n\o@\n}{^^J}{\z R{#1}^^J}    % decorators
+   %
+   \_def\o#1{\z O{#1}}
+   \_def\c#1\e{\z N{#1}}
+}
+
+\_gdef\_hipystr#1#2#3#4\_hipystr#5#6#7{%
+   \_ifx#1#5\s\x#3{#2#4#2}%
+   \_else \_afterfi{\_hipystr#1{#2}#3#4#6}\_fi
+}
+\_gdef\_hipystrpre#1\x#2{\x#2{#1}\x#2}
+
+\_ifx\LightBlue\_undefined \_gdef\LightBlue {\_setcmykcolor{1 0.43 0 0}}\_fi 
+\_ifx\Orange\_undefined    \_gdef\Orange    {\_setcmykcolor{0 0.64 1 0}}\_fi 
+
+\_endcode %------------------------------------------------
+
+This code was greatly inspired by the OPMac hisyntax macros for Python:
+
+   https://gitlab.fit.cvut.cz/krajnpet/PySyntax
+
+created by Petr Krajnik.
+
diff --git a/Master/texmf-dist/tex/optex/base/hisyntax-tex.opm b/Master/texmf-dist/tex/optex/base/hisyntax-tex.opm
new file mode 100644
index 00000000000..583676a2ca4
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hisyntax-tex.opm
@@ -0,0 +1,38 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl\_hisyntaxtex {Syntax highlighting for TeX sources <2020-04-03>} 
+
+\_newtoks\_hisyntaxtex  \_newtoks\_hicolorstex
+
+\_global\_hicolorstex={%  colors in TeX codes 
+   \_hicolor S \Blue    % control sequences
+   \_hicolor B \Magenta % {, }, $
+   \_hicolor C \Green   % comments
+}
+\_global\_hisyntaxtex={
+   \_the\_hicolorstex
+   \_replthis{\_string\%}{\y{_createcs}{\_csstring\%}}
+   \_replfromto{\_csstring\%}{^^J}{\x C{\_csstring\%#1}^^J}
+   \_replthis{\_string\\}{\y{_createcs}{\_csstring\\}}
+   \_replthis{\_string\{}{\y{_createcs}{\_csstring\{}}
+   \_replthis{\_string\}}{\y{_createcs}{\_csstring\}}}
+   \_replthis{\_string\$}{\y{_createcs}{\_csstring\$}}
+   \_replthis{\_csstring\\}{\y{_createcs}}
+   \_replthis{\_csstring\{}{\x B{\_csstring\{}}
+   \_replthis{\_csstring\}}{\x B{\_csstring\}}}
+   \_replthis{\_csstring\$}{\x B{\_csstring\$}}
+}
+\_gdef\_createcs#1{\_def\_csletters{#1}%
+   \_ifcat a\_noexpand#1\_afterfi{\_futurelet\_next\_createcsA}%
+   \_else \_ea\_createcsF \_fi
+}
+\_gdef\_createcsA{\_ifcat a\_noexpand\_next \_ea\_createcsB \_else \_ea\_createcsF \_fi}
+\_gdef\_createcsB#1{\_addto\_csletters{#1}\_futurelet\_next\_createcsA}
+\_gdef\_createcsF{\z S{\_csstring\\\_csletters}}
+\_gdef\_createbb{\_ea\_createcs\_csstring\\}
+
+\_endcode %------------------------------------------------
+
+The `\_createcs` reads next tokens as the tokenizer does it until the name
+of a control sequence is read. It is saved to the `\_csletters` macro and
+the macro \_createcsF prints it.
diff --git a/Master/texmf-dist/tex/optex/base/hyperlinks.opm b/Master/texmf-dist/tex/optex/base/hyperlinks.opm
new file mode 100644
index 00000000000..5fc8a32233b
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hyperlinks.opm
@@ -0,0 +1,157 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \ulink {Hyperlinks <2021-01-27>} % preloaded in format
+
+   \_doc ----------------------------
+   \`\dest``[<type>:<spec>]` creates a destination of internal links. The
+   destination is declared in the format `<type>:<spec>`. If the \^`\hyperlinks`
+   command in not used, then `\dest` does nothing else it is set to `\_destactive`.
+   The \`\_destactive` is implemented by `\_pdfdest` primitive. It creates a box
+   in which the destination is shifted by \`\_destheight`. The reason is that
+   the destination is exactly at the top border of the PDF viewer but we want to see
+   the line where the destination is. The destination box is positioned by a
+   different way dependent on the current vertical or horizontal mode.
+   \_cod ----------------------------
+
+\_def\_destheight{1.4em}
+\_def\_destactive[#1:#2]{\_if$#2$\_else\_ifvmode
+      \_tmpdim=\_prevdepth \_prevdepth=-1000pt
+      \_destbox[#1:#2]\_prevdepth=\_tmpdim
+   \_else \_destbox[#1:#2]%
+   \_fi\_fi
+}
+\_def\_destbox[#1]{\_vbox to\_zo{\_kern-\_destheight \_pdfdest name{#1} xyz\_vss}}
+\_def\_dest[#1]{}
+\_public \dest ;
+
+   \_doc ----------------------------
+   \`\link``[<type>:<spec>]{<color>}{<text>}` creates an internal link to \^`\dest`
+   with the same `<type>:<spec>`. You can have more links with the same
+   `<type>:<spec>` but only one `\dest` in the document. If \^`\hyperlinks`
+   command is not used, then `\link` only prints `<text>` else it is set to
+   `\_linkactive`.
+   The \`\_linkactive` is implemented by `\_pdfstartlink...\_pdfendlink`
+   primitives.
+   \nl
+   \`\ilink``[<type>:<spec>]{<text>}` is equivalent to `\_link` but
+   the `<color>` is used from \^`\hyperlinks` declaration.
+   \_cod ----------------------------
+
+\_protected\_def\_linkactive[#1:#2]#3#4{\_leavevmode\_pdfstartlink height.9em depth.3em
+      \_pdfborder{#1} goto name{#1:#2}\_relax {#3#4}\_pdfendlink
+}
+\_protected\_def\_link[#1]#2#3{\_leavevmode{#3}}
+\_protected\_def\_ilink[#1]#2{\_leavevmode{#2}}
+\_public \ilink \link ;
+
+   \_doc ----------------------------
+   \`\ulink``[<url>]{<text>}` creates external link. It prints only the `<text>` by default but
+   the \^`\hyperlinks` declaration defines it as \`\_urlactive``[url:<url>]{<text>}`.
+   The external link is created by the `\_pdfstartlink...\pdfendlink` primitives.
+   The `<url>` is detokenized with `\escapechar=-1` before it is used, so
+   `\%`, `\#` etc. can be used in the `<url>`.
+   \_cod ----------------------------
+
+\_protected\_def\_urlactive[#1:#2]#3#4{\_leavevmode{\_escapechar=-1
+   \_pdfstartlink height.9em depth.3em \_pdfborder{#1}%
+      user{/Subtype/Link/A <</Type/Action/S/URI/URI(\_detokenize{#2})>>}\_relax
+      {#3#4}\_pdfendlink}%
+}
+\_def\_ulink[#1]#2{\_leavevmode{#2}}
+\_def\_urlcolor{}
+\_public \ulink ;
+
+   \_doc ----------------------------
+   The `\_pdfstartlink` primitive uses `\_pdfborder{<type>}` in its parameter
+   (see \^`\_linkactive` or \^`\_urlactive` macros). The \`\_pdfborder``{<type>}`
+   expands to `attr{/C[? ? ?] /Border[0 0 .6]}` if the
+   `\_<type>border` (i.e.\ \`\_refborder`, \`\_citeborder`, \`\_tocborder`,
+   \`\_pgborder`, \`\_urlborder`, \`\_fntborder` or \`\_fnfborder`)
+   is defined. Users can define it in
+   order to create colored frames around active links. For example
+   `\def\_tocborder{1 0 0}` causes red frames in TOC (not printed, only visible
+   in PDF viewers).
+   \_cod ----------------------------
+
+\_def\_pdfborder#1{\_ifcsname _#1border\_endcsname
+       attr{/C[\_csname _#1border\_endcsname] /Border[0 0 .6]}%
+   \_else attr{/Border[0 0 0]}\_fi
+}
+
+   \_doc ----------------------------
+   \`\hyperlinks``{<ilink_color>}{<ulink_color>}` activates `\dest`, `\link`,
+   `\ilink`, `\ulink` in order they create links. These macros are redefined
+   here to their \"active" version.
+   \_cod ----------------------------
+
+\_def\_hyperlinks#1#2{%
+   \_let\_dest=\_destactive \_let\_link=\_linkactive
+   \_def\_ilink[##1]##2{\_link[##1]{\_localcolor#1}{##2}}%
+   \_def\_ulink[##1]##2{\_urlactive[url:##1]{\_localcolor#2}{##2}}%
+   \_public \dest \ilink \ulink \link ;%
+}
+\_public \hyperlinks ;
+
+   \_doc ----------------------------
+   \`\url``{<url>}` does approximately the same as \^`\ulink``[<url>]{<url>}`, but
+   more work is done before the `\ulink` is processed. The link-version of <url>
+   is saved to `\_tmpa` and the printed version in `\_tmpb`. The printed
+   version is modified in order to set breakpoints to special places of the
+   `<url>`. For example `//` is replaced by `\_urlskip/\_urlskip/\_urlbskip`
+   where `\urlskip` adds a small nonbreakable glue between these two slashes and
+   before them and `\_urlbskip` adds a breakable glue after them.
+   \nl
+   The text version of the `<url>` is printed in \`\_urlfont`.
+   \_cod ----------------------------
+
+\_def\_url#1{{%
+   \_def\_tmpa{#1}\_replstring\_tmpa {\|}{}%
+   {\_escapechar=-1 \_ea}\_ea\_edef\_ea\_tmpa\_ea{\_detokenize\_ea{\_tmpa}}%
+   \_def\_tmpb{#1}\_replstring\_tmpb {\|}{\_urlbskip}%
+   \_replstring\_tmpb {//} {{\_urlskip\_urlslashslash\_urlbskip}}%
+   \_replstring\_tmpb {/}  {{\_urlskip/\_urlbskip}}%
+   \_replstring\_tmpb {.}  {{\_urlskip.\_urlbskip}}%
+   \_replstring\_tmpb {?}  {{\_urlskip?\_urlbskip}}%
+   \_replstring\_tmpb {=}  {{\_urlskip=\_urlbskip}}%
+   \_ea\_replstring\_ea\_tmpb \_ea{\_string &} {{\_urlbskip\_char`\& \_urlskip}}%
+   \_ea\_replstring\_ea\_tmpb \_ea{\_bslash|}  {{\_penalty0}}%
+   \_ea\_ulink \_ea[\_tmpa] {\_urlfont\_tmpb\_null}%
+}}
+\_def\_urlfont{\_tt}
+\_def\_urlskip{\_null\_nobreak\_hskip0pt plus0.05em\_relax}
+\_def\_urlbskip{\_penalty100 \_hskip0pt plus0.05em\_relax}
+\_def\_urlslashslash{/\_urlskip/}
+
+\_public \url ;
+
+\_endcode % ----------------------------------------
+
+
+There are four types of internal links and one type of external link:
+
+\begitems
+* `ref:<label>`     -- the destination is created when `\label[<label>]` is used,
+                       see also the section \ref[references].
+* `toc:<tocrefnum>` -- the destination is created at chap/sec/secc titles,
+                       see also the section \ref[maketoc].
+* `pg:<gpageno>`    -- the destination is created at beginning of each page,
+                       see also the section \ref[output].
+* `cite:<bibnum>`   -- the destination is created in bibliography reference,
+                       see also the section \ref[bib].
+* `url:<url>`       -- used by `\url` or `\ulink`,
+                       see also the end of this section.
+\enditems
+
+The `<tocrefnum>`, `<gpageno>`, and `<bibnum>` are numbers starting from one and
+globally incremented by one in the whole document. The registers \^`\tocrefnum`,
+\^`\gpageno` and \^`\bibnum` are used for these numbers.
+
+When a chap/sec/secc title is prefixed by `\label[<label>]`, then both types
+of internal links are created at the same destination place:
+`toc:<tocrefnum>` and `ref:<label>`.
+
+\_endinput
+
+2021-01-27 \public \link added to \hyperlinks, bug fixed.
+2020-04-22 \| in \url: bug fixed
+2020-03-15 introduced
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/optex/base/hyphen-lan.opm b/Master/texmf-dist/tex/optex/base/hyphen-lan.opm
new file mode 100644
index 00000000000..dad0b26657e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/hyphen-lan.opm
@@ -0,0 +1,245 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \langlist {Initialization of hypenation patterns <2020-03-10>} % preloaded in format
+
+   \_doc -----------------------------
+   The <iso-code> means a shortcut of language name (mostly by ISO 639-1).
+   The following control sequences are used for language switching:
+   \begitems
+   * `\_lan:<number>` expands to `<iso-code>` of the language.
+     The <number> is an internal number of languages used as a value of
+     `\language` register.
+   * `\_ulan:<long-lang>` expands to `<iso-code>` too. This is transformation
+     from long name of language (lowercase letters) to <iso-code>.
+   * `\_<iso-code>Patt` (for example `\_csPatt`) is the language `<number>` declared by `\chardef`.
+   * `\<iso-code>lang`
+     (for example \`\enlang`, \`\cslang`, \`\sklang`, \`\delang`, \`\pllang`)
+     is language selector.  It exists in two states
+     \begitems
+     * Initialization state: when `\<iso-code>lang` is used first then it
+       must load the patterns into memory using Lua code. If it is done then
+       the `\<iso-code>lang` re-defines itself to the processing state.
+     * Processing state: it only sets `\language=\_<iso-code>Patt`, i.e it
+       selects the hyphenation patterns. It does a little more
+       language-dependent work, as mentioned below.
+     \enditems
+   * `\_langspecific:<isocode>` is processed by `\<iso-code>lang` and it
+     should include language-specific macros declared by the user or macro designer.
+   \enditems
+   The USenglish patters are preloaded first:
+   \_cod -----------------------------
+
+\_chardef\_enPatt=0
+\_def\_pattlist{\_enPatt=0}
+\_def\_langlist{en(USenglish)}
+\_sdef{_lan:0}{en}
+\_sdef{_ulan:usenglish}{en}
+\_def\_enlang{\_uselang{en}\_enPatt23} % \lefthyph=2 \righthyph=3
+\_def\enlang{\_enlang}
+\_sdef{_langspecific:en}{\_nonfrenchspacing}
+
+\_lefthyphenmin=2 \_righthyphenmin=3 % disallow x- or -xx breaks
+\_input hyphen  % en(USenglish) patterns from TeX82
+
+   \_doc -----------------------------
+   \`\_preplang` `<iso-code> <long-lang> <hyph-file-spec> <number> <pre-hyph><post-hyph>`
+   prepares the\nl `\<iso-code>lang` to its initialization state. Roughly
+   speaking, it does:
+   \begtt \catcode`\<=13
+   \chardef\_<iso-code>Patt = <number>
+   \def\_lan:<number> {<iso-code>}
+   \def\_ulan:<long-lang> {<iso-code>}
+   \def\_<iso-code>lang {%
+      \_loadpattrs <hyph-file-spec> <number> <long-lang> % loads patterns using Lua code
+      \gdef\_<iso-code>lang {\_uselang{<iso-code>}\_<iso-code>Patt <pre-hyph><post-hyph>}
+      \_<iso-code>lang                  % runs itself in processing state
+   }
+   \def\<iso-code>lang {\_<iso-code>lang} % public version \<iso-code>lang
+   \endtt
+   You can see that `\<iso-code>lang` runs \^`\_loadpattrs` and
+   \^`\_uselang` first (in initialization state) and it runs
+   only \^`\_uselang` when it is called again (in processing state).
+   \_cod -----------------------------
+
+\_def\_preplang #1 #2 #3 #4 #5 {%
+   \_ea\_chardef \_csname _#1Patt\_endcsname=#4
+   \_sdef{_lan:#4}{#1}\_lowercase{\_sdef{_ulan:#2}}{#1}%
+   \_def\_next{\_ea\_noexpand\_csname _#1lang\_endcsname}%
+   \_ea\_edef \_csname _#1lang\_endcsname {%
+      \_noexpand\_loadpattrs #3 #4 #2 % loads patterns
+      \_gdef\_next{\_noexpand\_uselang{#1}\_csname _#1Patt\_endcsname #5}% re-defines itself
+      \_next                                   %  runs itself in processing state
+   }
+   \_addto\_langlist{ #1(#2)}%
+   \_sdef{#1lang\_ea}\_ea{\_csname _#1lang\_endcsname}% unprefixed \<isocode>lang
+}
+
+   \_doc -----------------------------
+   \`\_loadpattrs` `<hyph-file-spec> <number> <long-lang>`
+   loads hyphenation patterns and hyphenation exceptions for given language
+   and registers them as `\language=<number>`.
+
+   The <hyph-file-spec> is a part of full file name wich is read:
+   `hyph-<hyph-file-spec>.tex`. The patterns and hyphenation exceptions
+   are saved here in UTF-8 encoding.
+   The <hyph-file-spec> should be a list of individual <hyph-file-spec>'s
+   separated by commas, see the language Serbian below for an example.
+   \_cod -----------------------------
+
+\_def\_loadpattrs#1 #2 #3 {%
+   \_wlog{Loading hyphenation #3: (#1) \_string\language=#2}%
+   \_begingroup\_setbox0=\_vbox{% we don't want spaces in horizontal mode
+      \_language=#2\_def\\{#3}%
+      \_let\patterns=\_patterns \_let\hyphenation=\_hyphenation \_def\message##1{}%
+      \_loadpattrsA #1,,%
+   }\_endgroup
+}
+\_def\_loadpattrsA #1,{\_ifx,#1,\_else
+   \_isfile {hyph-#1}\_iftrue \_opinput{hyph-#1}%
+   \_else \_opwarning{No hyph. patterns #1 for \\, missing package?}%
+          \_def\_opwarning##1{}\_fi
+   \_ea \_loadpattrsA \_fi
+}
+
+   \_doc -----------------------------
+   \`\_uselang``{<iso-code>}\_<iso-code>Patt <pre-hyph><post-hyph>`\nl
+   sets `\language`, `\lefthyphenmin`, `\righthyphenmin` and runs
+   `\frenchspacing`. This default language-dependent settings
+   should be re-declared by `\_langspecific:<iso-code>` which is run
+   finally (it is `\relax` by default, only `\_langspecific:en` runs
+   \^`\nonfrenchspacing`).
+   \_cod -----------------------------
+
+\_def\_uselang#1#2#3#4{\_language=#2\_lefthyphenmin=#3\_righthyphenmin=#4\_relax
+   \_frenchspacing  % \nonfrenchspacing can be set in \cs{_langspecific:lan}
+   \_cs{_langspecific:#1}%
+}
+   \_doc -----------------------------
+   The \`\uselanguage` `{<long-lang>}` is defined here
+   (for compatibility with e-plain users).
+   \_cod -----------------------------
+
+\_def\_uselanguage#1{\_lowercase{\_cs{_\_cs{_ulan:#1}lang}}}
+\_public \uselanguage ;
+
+   \_doc -----------------------------
+   The numbers for languages are declared as fixed constants (no
+   auto-generated). This concept is inspired by CSplain.
+   There are typical numbers of languages in CSplain: 5=Czech in IL2,
+   15=Czech in T1 and 115=Czech in Unicode. We keep these constants
+   but we load only Unicode patterns (greater than 100), of course.
+   \_cod -----------------------------
+
+\_preplang enus  USenglishmax    en-us             100 23
+\_preplang engb  UKenglish       en-gb             101 23
+\_preplang it    Italian         it                102 22
+\_preplang ia    Interlingua     ia                103 22
+\_preplang id    Indonesian      id                104 22
+
+\_preplang cs    Czech           cs                115 23
+\_preplang sk    Slovak          sk                116 23
+\_preplang de    nGerman         de-1996           121 22
+\_preplang fr    French          fr                122 22
+\_preplang pl    Polish          pl                123 22
+\_preplang cy    Welsh           cy                124 23
+\_preplang da    Danish          da                125 22
+\_preplang es    Spanish         es                126 22
+\_preplang sl    Slovenian       sl                128 22
+\_preplang fi    Finnish         fi                129 22
+\_preplang hu    Hungarian       hu                130 22
+\_preplang tr    Turkish         tr                131 22
+\_preplang et    Estonian        et                132 23
+\_preplang eu    Basque          eu                133 22
+\_preplang ga    Irish           ga                134 23
+\_preplang nb    Bokmal          nb                135 22
+\_preplang nn    Nynorsk         nn                136 22
+\_preplang nl    Dutch           nl                137 22
+\_preplang pt    Portuguese      pt                138 23
+\_preplang ro    Romanian        ro                139 22
+\_preplang hr    Croatian        hr                140 22
+\_preplang zh    Pinyin          zh-latn-pinyin    141 11
+\_preplang is    Icelandic       is                142 22
+\_preplang hsb   Uppersorbian    hsb               143 22
+\_preplang af    Afrikaans       af                144 12
+\_preplang gl    Galician        gl                145 22
+\_preplang kmr   Kurmanji        kmr               146 22
+\_preplang tk    Turkmen         tk                147 22
+\_preplang la    Latin           la                148 22
+\_preplang lac   classicLatin    la-x-classic      149 22
+\_preplang lal   liturgicalLatin la-x-liturgic     150 22
+\_preplang elm   monoGreek       el-monoton        201 11
+\_preplang elp   Greek           el-polyton        202 11
+\_preplang grc   ancientGreek    grc               203 11
+\_preplang ca    Catalan         ca                204 22
+\_preplang cop   Coptic          cop               205 11
+\_preplang mn    Mongolian       mn-cyrl           206 22
+\_preplang sa    Sanskrit        sa                207 13
+\_preplang ru    Russian         ru                208 22
+\_preplang uk    Ukrainian       uk                209 22
+\_preplang hy    Armenian        hy                210 12
+\_preplang as    Assamese        as                211 11
+\_preplang hi    Hindi           hi                212 11
+\_preplang kn    Kannada         kn                213 11
+\_preplang lv    Latvian         lv                215 22
+\_preplang lt    Lithuanian      lt                216 22
+\_preplang ml    Malayalam       ml                217 11
+\_preplang mr    Marathi         mr                218 11
+\_preplang or    Oriya           or                219 11
+\_preplang pa    Panjabi         pa                220 11
+\_preplang ta    Tamil           ta                221 11
+\_preplang te    Telugu          te                222 11
+
+\_preplang be    Belarusian      be                223 22
+\_preplang bg    Bulgarian       bg                224 22
+\_preplang bn    Bengali         bn                225 11
+\_preplang cu    churchslavonic  cu                226 12
+\_preplang deo   oldGerman       de-1901           227 22
+\_preplang gsw   swissGerman     de-ch-1901        228 22
+\_preplang eo    Esperanto       eo                229 22
+\_preplang fur   Friulan         fur               230 22
+\_preplang gu    Gujarati        gu                231 11
+\_preplang ka    Georgian        ka                232 12
+\_preplang mk    Macedonian      mk                233 22
+\_preplang oc    Occitan         oc                234 22
+\_preplang pi    Pali            pi                235 12
+\_preplang pms   Piedmontese     pms               236 22
+\_preplang rm    Romansh         rm                237 22
+\_preplang sr    Serbian         sh-cyrl,sh-latn   238 22
+\_preplang sv    Swedish         sv                239 22
+\_preplang th    Thai            th                240 23
+\_preplang ethi  Ethiopic        mul-ethi          241 11
+
+   \_doc -----------------------------
+   The \`\langlist` includes names of all languages which are ready to load
+   and use their hyphenation patterns. This list is printed to the terminal and
+   to log at ini\TeX/ state here. It can be used when processing documents too.
+   \_cod -----------------------------
+
+\_message{Language hyph.patterns ready to load: \_langlist.
+   Use \_string\<shortname>lang to initialize language,
+   \_string\cslang\_space for example}
+
+\_public \langlist ;
+
+\_endcode % ---------------------------------------------
+
+
+Maybe, you need to do more language-specific actions than just switching
+hyphenation patterns. For example, you need to load a specific font with a
+specific script used in the selected language, you can define macros for
+quotation marks depending on the language, etc.
+
+The example shows how to declare such language-specific things.
+
+\begtt
+\def\langset #1 #2{\sdef{_langspecific:#1}{#2}}
+
+\langset fr {... declare French quotation marks}
+\langset de {... declare German quotation marks}
+\langset gr {... switch to Greek fonts family}
+... etc.
+\endtt
+
+Note that you need not set language-specific phrases (like `\today`)
+by this code. Another concept is used for such tasks. See the
+section~\ref[langphrases] for more details.
diff --git a/Master/texmf-dist/tex/optex/base/if-macros.opm b/Master/texmf-dist/tex/optex/base/if-macros.opm
new file mode 100644
index 00000000000..462e4960172
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/if-macros.opm
@@ -0,0 +1,313 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \newif {Special if-macros, is-macros and loops <2021-02-03>} % preloaded in format
+
+   \_doc ----------------------------
+   \secc Classical \code{\\newif}
+   The \`\newif` macro implements boolean value.
+   It works as in plain \TeX. It means that
+   after `\newif\ifxxx` you can use `\xxxtrue` or
+   `\xxxfalse` to set the boolean value and use `\ifxxx true\else false\fi`
+   to test this value. The default value is false.
+
+   The macro \`\_newifi` enables to declare `\_ifxxx` and to use `\_xxxtrue` and
+   `\_xxxfalse`. This means that it is usable for the internal namespace
+   (`_`prefixed macros).
+   \_cod ----------------------------
+
+\_def\_newif #1{\_ea\_newifA \_string #1\_relax#1}
+\_ea\_def \_ea\_newifA \_string\if #1\_relax#2{%
+   \_sdef{#1true}{\_let#2=\_iftrue}%
+   \_sdef{#1false}{\_let#2=\_iffalse}%
+   \_let#2=\_iffalse
+}
+\_def\_newifi #1{\_ea\_newifiA \string#1\_relax#1}
+\_ea\_def \_ea\_newifiA \_string\_if #1\_relax#2{%
+   \_sdef{_#1true}{\_let#2=\_iftrue}%
+   \_sdef{_#1false}{\_let#2=\_iffalse}%
+   \_let#2=\_iffalse
+}
+\_public \newif ;
+
+   \_doc ----------------------------
+   \`\afterfi` `{<what to do>}<ignored>\fi` closes condition by `\fi` and processes
+   <what to do>. Usage:
+   \begtt
+   \if<something> \afterfi{<result is true>} \else \afterfi{<resut is false>} \fi
+   \endtt
+   \_cod ----------------------------
+
+\_def\_afterfi#1#2\_fi{\_fi#1}
+\_def\afterfi#1#2\fi{\_fi#1}
+
+   \_doc ----------------------------
+   \secc Loops
+   The \`\loop` `<codeA> \ifsomething <codeB>` \`\repeat` loops `<codeA><codeB>`
+   until `\ifsomething` is false. Then `<codeB>` is not executed and loop is
+   finished. This works like in plain \TeX, but implementation is somewhat
+   better (you can use `\else` clause after the `\ifsomething`).
+
+   There are public version `\loop...\repeat` and private version
+   \`\_loop` ...\`\_repeat`. You cannot mix both versions in one loop.
+
+   The `\loop` macro keeps its original plain TeX meaning. It is not
+   expandable and nested `\loop`s are possible only in a \TeX/ group.
+   \_cod ----------------------------
+
+\_long\_def \_loop #1\_repeat{\_def\_body{#1}\_iterate}
+\_long\_def \loop #1\repeat{\_def\_body{#1}\_iterate}
+\_let \_repeat=\_fi % this makes \loop...\if...\repeat skippable
+\_let \repeat=\_fi
+\_def \_iterate {\_body \_ea \_iterate \_fi}
+
+   \_doc -----------------------------
+   \`\foreach` `<list>`\`\do` `{<what>}`
+   repeats `<what>` for each element of the
+   `<list>`. The `<what>` can include `#1` which is substituted by each
+   element of the `<list>`. The macro is expandable.
+   \nl
+   \`\foreach` `<list>`\`\do` `<parameter-mask>{<what>}`
+   reads parameters from <list> repeatedly and does <what> for each such reading.
+   The parameters are declared by <parameter-mask>. Examples:
+   \begtt
+   \foreach (a,1)(b,2)(c,3)\do (#1,#2){#1=#2 }
+   \foreach word1,word2,word3,\do #1,{Word is #1.}
+   \foreach A=word1 B=word2 \do #1=#2 {"#1 is set as #2".}
+   \endtt
+   Note that `\foreach <list>\do {<what>}` is equivalent to `\foreach <list>\do #1{<what>}`.
+
+   Recommendation: it is better to use private variants of \`\_foreach`.
+   When the user writes `\input tikz` then `\foreach` macro is redefined! The
+   private variants use \`\_do` separator instead `\do` separator.
+   \_cod -----------------------------
+
+\_newcount\_frnum        % the numeric variable used in \fornum
+\_def\_do{\_doundefined} % we need to ask \_ifx#1\_do ...
+
+\_long\_def\_foreach #1\_do #2#{\_isempty{#2}\_iftrue
+   \_afterfi{\_foreachA{#1}{##1}}\_else\_afterfi{\_foreachA{#1}{#2}}\_fi}
+\_long\_def\_foreachA #1#2#3{\_putforstack
+   \_immediateassignment \_long\_gdef\_fbody#2{\_testparam##1..\_iftrue #3\_ea\_fbody\_fi}%
+   \_fbody #1#2\_finbody\_getforstack
+}
+\_def\_testparam#1#2#3\_iftrue{\_ifx###1\_empty\_ea\_finbody\_else}
+\_def\_finbody#1\_finbody{}
+
+\_long\_def\foreach #1\do#2#{\_isempty{#2}\_iftrue
+   \_afterfi{\_foreachA{#1}{##1}}\_else\_afterfi{\_foreachA{#1}{#2}}\_fi}
+
+   \_doc -----------------------------
+   \`\fornum` `<from>..<to>` \`\do` `{<what>}` or
+   \`\fornumstep` `<num>: <from>..<to>` \`\do` `{<what>}`
+   repeats `<what>` for each number from `<from>` to `<to>` (with step `<num>`
+   or with step one). The `<what>` can include `#1` which is substituted by
+   current number. The <from>, <to>, <step> parameters can be numeric expressions.
+   The macro is expandable.\nl
+   The test in the \`\_fornumB` says: if (<to> $\string<$ <current number>
+   AND <step> is positive) or if (<to> $>$ <current number> AND <step> is
+   negative) then close loop by `\_getforstack`. Sorry, the condition is
+   writen by somewhat cryptoid \TeX/ language.
+   \_cod -----------------------------
+
+\_def\_fornum#1..#2\_do{\_fornumstep 1:#1..#2\_do}
+\_long\_def\_fornumstep#1:#2..#3\_do#4{\_putforstack
+   \_immediateassigned{%
+      \_gdef\_fbody##1{#4}%
+      \_global\_frnum=\_numexpr#2\_relax
+   }%
+   \_ea\_fornumB\_ea{\_the\_numexpr#3\_ea}\_ea{\_the\_numexpr#1}%
+}
+\_def\_fornumB #1#2{\_ifnum#1\_ifnum#2>0<\_else>\_fi \_frnum \_getforstack
+   \_else \_ea\_fbody\_ea{\_the\_frnum}%
+      \_immediateassignment\_global\_advance\_frnum by#2
+      \_afterfi{\_fornumB{#1}{#2}}\_fi
+}
+\_def\fornum#1..#2\do{\_fornumstep 1:#1..#2\_do}
+\_def\fornumstep#1:#2..#3\do{\_fornumstep #1:#2..#3\_do}
+
+   \_doc ----------------------------
+   The `\foreach` and `\fornum` macros can be nested and arbitrary combined.
+   When they are nested then use `##1` for the variable of nested level,
+   `####1` for the variable of second nested level etc. Example:
+   \begtt
+   \foreach ABC \do {\fornum 1..5 \do {letter:#1, number: ##1. }}
+   \endtt
+   Implementation note:
+   we cannot use \TeX/-groups for nesting levels because we want to do the
+   macros expandable. We must implement a special for-stack which saves the
+   data needed by `\foreach` and `\fornum`. The \`\_putforstack` is used
+   when `\for*` is initialized and \`\_getforstack` is used when the
+   `\for*` macro ends. The \`\_forlevel` variable keeps the current nesting
+   level. If it is zero, then we need not save nor restore any data.
+   \_cod ----------------------------
+
+\_newcount\_forlevel
+\_def\_putforstack{\_immediateassigned{%
+   \_ifnum\_forlevel>0
+      \_sxdef{_frnum:\_the\_forlevel\_ea}{\_the\_frnum}%
+      \_global\_slet{_fbody:\_the\_forlevel}{_fbody}%
+   \_fi
+   \_incr\_forlevel
+}}
+\_def\_getforstack{\_immediateassigned{%
+   \_decr\_forlevel
+   \_ifnum\_forlevel>0
+      \_global\_slet{_fbody}{_fbody:\_the\_forlevel}%
+      \_global\_frnum=\_cs{_frnum:\_the\_forlevel}\_space
+   \_fi
+}}
+\_ifx\_immediateassignment\_undefined % for compatibility with older LuaTeX
+   \_let\_immediateassigned=\_useit \_let\_immediateassignment=\_empty
+\_fi
+
+   \_doc ----------------------------
+   User can define own expandable \"foreach" macro by
+   \`\foreachdef` `\macro <parameter-mask>{<what>}`
+   which can be used by `\macro {<list>}`. The macro reads repeatedly parameters from <list>
+   using <parameter-mask> and does <what> for each such reading. For example
+   \begtt
+   \foreachdef\mymacro #1,{[#1]}
+   \mymacro{a,b,cd,efg,}
+   \endtt
+   expands to [a][b][cd][efg]. Such user defined macros are more effecive during processing
+   than `\foreach` itself because they need not to operate with the for-stack.
+   \_cod ----------------------------
+
+\_def\_foreachdef#1#2#{\_toks0{#2}%
+   \_long\_edef#1##1{\_ea\_noexpand\_csname _body:\_csstring#1\_endcsname
+                     ##1\_the\_toks0 \_noexpand\_finbody}%
+   \_foreachdefA#1{#2}}
+\_def\_foreachdefA#1#2#3{%
+   \_long\_sdef{_body:\_csstring#1}#2{\_testparam##1..\_iftrue #3\_cs{_body:\_csstring#1\_ea}\_fi}}
+
+\_public \foreachdef ;
+
+   \_doc ----------------------------
+   \secc Is-macros
+   There are a collection of macros
+   \^`\isempty`, \^`\istoksempty`, \^`\isequal`, \^`\ismacro`,
+   \^`\isdefined`, \^`\isinlist`, \^`\isfile` and \^`\isfont`
+   with common syntax:
+   \begtt \catcode`\<=13
+   \issomething <params> \iftrue <codeA> \else <codeB> \fi
+   or
+   \issomething <params> \iffalse <codeB> \else <codeA> \fi
+   \endtt
+   The `\else` part is optional. The `<codeA>` is processed if
+   `\issomething<params>` generates true condition. The `<codeB>`
+   is processed if `\issomething<params>` generates false condition.
+
+   The `\iftrue` or `\iffalse` is an integral part of this syntax
+   because we need to keep skippable nested `\if` conditions.
+
+   Implementation note:
+   we read this `\iftrue` or `\iffalse` into unseparated parameter and repeat
+   it because we need to remove an optional space before this command.
+
+   \medskip\noindent
+   \`\isempty` `{<text>}\iftrue`
+   is true if the `<text>` is empty. This macro is expandable.\nl
+   \`\istoksempty` `<tokens variable>\iftrue`
+   is true if the `<tokens variable>` is empty. It is expandable.
+   \_cod ----------------------------
+
+\_long\_def \_isempty #1#2{\_if\_relax\_detokenize{#1}\_relax \_else \_ea\_unless \_fi#2}
+\_def \_istoksempty #1#2{\_ea\_isempty\_ea{\_the#1}#2}
+\_public \isempty \istoksempty ;
+
+   \_doc ----------------------------
+   \`\isequal` `{<textA>}{<textB>}\iftrue`
+   is true if the <textA> and <textB> are
+   equal, only from strings point of view, category codes are ignored.
+   The macro is expandable.
+   \_cod ----------------------------
+
+\_def\_isequal#1#2#3{\_directlua{%
+   if "\_luaescapestring{\_detokenize{#1}}"=="\_luaescapestring{\_detokenize{#2}}"
+   then else tex.print("\_nbb unless") end}#3}
+\_public \isequal ;
+
+   \_doc ----------------------------
+   \`\ismacro` `\macro{text}\iftrue` is true if macro is defined as {<text>}.
+   Category codes are ignored in this testing. The macro is expandable.
+   \_cod ----------------------------
+
+\_def\_ismacro#1{\_ea\_isequal\_ea{#1}}
+\_public \ismacro ;
+
+   \_doc ----------------------------
+   \`\isdefined` `{<csname>}\iftrue` is true if `\<csname>` is defined.
+   The macro is expandable.
+   \_cod ----------------------------
+
+\_def\_isdefined #1#2{\_ifcsname #1\_endcsname \_else \_ea\_unless \_fi #2}
+\_public \isdefined ;
+
+   \_doc ----------------------------
+   \`\isinlist` `\list{<text>}\iftrue` is true if the
+   `<text>` is included the macro body of the `\list`.
+   The category codes are relevant here. The macro is not expandable.
+   \_cod ----------------------------
+
+\_long\_def\_isinlist#1#2{\_begingroup
+   \_long\_def\_tmp##1#2##2\_end/_%
+        {\_endgroup\_if\_relax\_detokenize{##2}\_relax \_ea\_unless\_fi}%
+   \_ea\_tmp#1\_endlistsep#2\_end/_%
+}
+\_public \isinlist ;
+
+   \_doc -----------------------------
+   \`\isfile` `{<filename>}\iftrue` is true if the file <filename> exists and are
+   readable by \TeX.
+   \_cod -----------------------------
+
+\_newread \_testin
+\_def\_isfile #1{%
+   \_openin\_testin ={#1}\_relax
+   \_ifeof\_testin \_ea\_unless
+   \_else \_closein\_testin
+   \_fi
+}
+\_public \isfile ;
+
+   \_doc -----------------------------
+   \`\isfont` `{<fontname or [fontfile]>}\iftrue`
+   is true if a given font exists. The result of this testing
+   is saved to the \`\_ifexistfam`.
+   \_cod -----------------------------
+
+\_newifi \_ifexistfam
+\_def\_isfont#1#2{%
+   \_begingroup
+       \_suppressfontnotfounderror=1
+       \_font\_testfont={#1}\_relax
+       \_ifx\_testfont\_nullfont \_def\_tmp{\_existfamfalse \_unless}
+       \_else \_def\_tmp{\_existfamtrue}\_fi
+   \_ea \_endgroup \_tmp #2%
+}
+\_public \isfont ;
+
+   \_doc ----------------------------
+   The last macro \`\isnextchar` `<char>{<codeA>}{<codeB>}`
+   has a different syntax than all other is-macros.
+   It executes `<codeA>` if next character is equal to <char>.
+   Else the `<codeB>` is executed. The macro is not expandable.
+   \_cod ----------------------------
+
+\_long\_def\_isnextchar#1#2#3{\_begingroup\_toks0={\_endgroup#2}\_toks1={\_endgroup#3}%
+   \_let\_tmp= #1\_futurelet\_next\_isnextcharA
+}
+\_def\_isnextcharA{\_the\_toks\_ifx\_tmp\_next0\_else1\_fi\_space}
+
+\_public \isnextchar ;
+
+
+\_endcode
+
+2021-02-03 public version of \loop and \foreach are \long
+2020-05-22 \foreach, \fornum: all settings are global, independent on TeX group
+2020-05-06 \isnextchar: \let\tmp=#1 -> \let\tmp= #1 (bug fix, #1 should be space)
+2020-05-02 \newif bug fix
+2020-04-15 \fornumstep 3: 1..12 instead \fornum 1..12\step 3
+2020-04-15 \fornum, \foreach can be nested without groups
+2020-04-01 implemented
diff --git a/Master/texmf-dist/tex/optex/base/keyval.opm b/Master/texmf-dist/tex/optex/base/keyval.opm
new file mode 100644
index 00000000000..b0462296b37
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/keyval.opm
@@ -0,0 +1,82 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \readkv {Key-value dictionaries <2020-12-21>} % preloaded in format
+
+   \_doc ----------------------------
+   {\bf Implementation.}
+   The \`\readkv` expands its parameter and does replace-strings in order to
+   remove spaces around equal signs and after commas. Double commas are
+   removed. Then \`\_kvscan` reads the parameters list finished by the double
+   comma and saves values to `\_kv:<key>` macros.\nl
+   The \`\kv``{<key>}` expands the `\_kv:<key>` macro. If this macro isn't
+   defined then \`\_kvunknown` is processed. You can re-define it if you want.
+   \_cod ----------------------------
+
+\_def\_readkv#1{\_ea\_def\_ea\_tmpb\_ea{#1}%
+   \_replstring\_tmpb{= }{=}\_replstring\_tmpb{ =}{=}%
+   \_replstring\_tmpb{, }{,}\_replstring\_tmpb{,,}{,}%
+   \_ea \_kvscan \_tmpb,,=,}
+\_def\_kvscan #1#2=#3,{\_ifx#1,\_else \_sdef{_kv:#1#2}{#3}\_ea\_kvscan\_fi}
+\_def\_kv#1{\_trycs{_kv:#1}{\_kvunknown}}
+\_def\_kvunknown{???}
+
+\public \readkv \kv ;
+
+\_endcode
+
+Users or macro programmers can define macros with options in key=value format.
+It means a comma-separated list of equations key=value. First, we give an
+example.
+
+Suppose that you want to define a macro `\myframe` with options: color of
+rules, color of text inside the frame, rule-width, space between text and
+rules. You want to use this macro as:
+
+\begtt
+\myframe [margins=5pt,rule-width=2pt,frame-color=\Red,text-color=\Blue] {text1}
+or
+\myframe [frame-color=\Blue] {text2} % other parameters are default
+\endtt
+%
+You can define `\myframe` as follows:
+
+\begtt
+\def\myframedefaults{%    defaults:
+   frame-color=\Black, % color of frame rules
+   text-color=\Black,  % color ot text nside the frame
+   rule-width=0.4pt,   % width of rules used in the frame
+   margins=2pt,        % space between text inside and rules.
+}
+\optdef\myframe [] #1{\bgroup
+   \ea\addto\ea\myframedefaults\ea{\ea,\the\opt}%
+   \readkv\myframedefaults
+   \rulewidth=\kv{rule-width}
+   \hhkern=\kv{margins}\vvkern=\kv{margins}\relax
+   \kv{frame-color}\frame{\kv{text-color}\strut #1}%
+   \egroup}
+\endtt
+%
+We recommend using \^`\optdef` for defining macros with optional parameters
+written in `[]`. Then the optional parameters are saved in the \^`\opt` tokens
+register. First: we append the \^`\opt` (actual optional parameters) to
+`\myframedefault` by \^`\addto` macro.
+Second: we read the parameters by
+\^`\readkv{<pramaters list>}` macro.
+Third: the values can be used by expandable \^`\kv{<key>}` macro.
+The \^`\kv{<key>}` returns `???` if such key is not declared.
+
+You can use keys without values in the parameters list too, but with
+additional care. For example, suppose `draft` option without parameter.
+If a user writes `\myframe [..., draft, ...]{text}` then `\myframe` should behave differently.
+We have to add `DRAFTv=0,` in `\myframedefault` macro.
+Moreover, `\myframe` macro must include preprocessing of `\myframedefault` using
+\^`\replstring` which replaces the occurrence of `draft` by `DRAFTv=1`.
+\begtt
+\optdef\myframe [] #1{...
+   \ea\addto\ea\myframedefaults\ea{\the\opt}%
+   \replstring\myframedefaults{draft}{DRAFTv=1}%
+   \readkv\myframedefaults
+   ...
+   \ifnum\kv{DRAFTv}=1 draft mode\else normal mode\fi
+   ...}
+\endtt
diff --git a/Master/texmf-dist/tex/optex/base/languages.opm b/Master/texmf-dist/tex/optex/base/languages.opm
new file mode 100644
index 00000000000..ff9373b7202
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/languages.opm
@@ -0,0 +1,188 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_mtext {Languages <2021-01-21>} % preloaded in format
+
+   \_doc -----------------------------
+   Only four words are generated by \OpTeX/ macros: \"Chapter",
+   \"Table", \"Figure" and \"Subject". These phrases can be generated depending
+   on the current value of `\language` register, if you use \`\_mtext``{<phrase-id>}`,
+   specially `\_mtext{chap}`, `\_mtext{t}`, `\_mtext{f}` or `\_mtext{subj}`.
+   If your macros generate more words then
+   you can define such words by `\sdef{_mt:<phrase-id>:<lang>}` where
+   `<phrase-id>` is a label for the declared word and `<lang>` is a language shortcut
+   (iso code).
+   \_cod -----------------------------
+
+\_def\_mtext#1{\_trycs{_mt:#1:\_trycs{_lan:\_the\_language}{en}}
+   {\_csname _mt:#1:en\_endcsname}}
+
+\_sdef{_mt:chap:en}{Chapter} \_sdef{_mt:chap:cs}{Kapitola} \_sdef{_mt:chap:sk}{Kapitola}
+\_sdef{_mt:t:en}{Table}      \_sdef{_mt:t:cs}{Tabulka}     \_sdef{_mt:t:sk}{Tabuľka}
+\_sdef{_mt:f:en}{Figure}     \_sdef{_mt:f:cs}{Obrázek}     \_sdef{_mt:f:sk}{Obrázok}
+\_sdef{_mt:subj:en}{Subject} \_sdef{_mt:subj:cs}{Věc}      \_sdef{_mt:subj:sk}{Vec}
+
+   \_doc -----------------------------
+   Using \`\_langw` `<lang> <chapter> <table> <figure> <subject>` you can
+   declare these words more effectively:
+   \maxlines=13
+   \_cod -----------------------------
+
+\_def \_langw #1 #2 #3 #4 #5 {%
+   \_sdef{_mt:chap:#1}{#2}\_sdef{_mt:t:#1}{#3}\_sdef{_mt:f:#1}{#4}%
+   \_sdef{_mt:subj:#1}{#5}%
+}
+
+\_langw en  Chapter      Table       Figure       Subject
+%--------------------------------------------------------------
+\_langw cs  Kapitola     Tabulka     Obrázek      Věc
+\_langw de  Kapitel      Tabelle     Abbildung    Betreff
+\_langw es  Capítulo     Tabla       Figura       Sujeto
+\_langw fr  Chaptire     Tableau     Figure       Matière
+\_langw it  Capitolo     Tabella     Fig.         Oggetto
+\_langw pl  Rozdział     Tabela      Ilustracja   Temat
+\_langw gr  Κεφάλαιο     Πίνακας     Σχήμα        θέμα
+\_langw ru  Глава        Таблица     Рисунок      Предмет
+\_langw sk  Kapitola     Tabuľka     Obrázok      Vec
+
+   \_doc -----------------------------
+   You can add more words as you wish. For example \`\today` macro:
+   \_cod -----------------------------
+
+\_def \_monthw #1 #2 #3 #4 #5 #6 #7 {%
+   \_sdef{_mt:m1:#1}{#2}\_sdef{_mt:m2:#1}{#3}\_sdef{_mt:m3:#1}{#4}%
+   \_sdef{_mt:m4:#1}{#5}\_sdef{_mt:m5:#1}{#5}\_sdef{_mt:m6:#1}{#5}%
+   \_monthwB #1
+}
+\_def \_monthwB #1 #2 #3 #4 #5 #6 #7 {%
+   \_sdef{_mt:m7:#1}{#2}\_sdef{_mt:m8:#1}{#3}\_sdef{_mt:m9:#1}{#4}%
+   \_sdef{_mt:m10:#1}{#5}\_sdef{_mt:m11:#1}{#5}\_sdef{_mt:m12:#1}{#5}%
+}
+
+\_monthw en  January February March April May June
+             July August September October November December
+\_monthw cs  ledna února března dubna května června
+             července srpna září října listopadu prosince
+\_monthw sk  januára februára marca apríla mája júna
+             júla augusta septembra októbra novembra decembra
+\_monthw it  gennaio febbraio marzo aprile maggio giugno
+             luglio agosto settembre ottobre novembre dicembre
+
+
+\_sdef{_mt:today:en}{\_mtext{m\_the\_month} \_the\_day, \_the\_year}
+\_sdef{_mt:today:cs}{\_the\_day.~\_mtext{m\_the\_month} \_the\_year}
+\_slet{_mt:today:sk}{_mt:today:cs}
+
+\_def\_today{\_mtext{today}}
+\_public \today ;
+
+   \_doc -----------------------------
+   Quotes should be tagged by `\"<text>"` and `\'<text>'` if `\<iso-code>quotes`
+   is declared at beginning of the document (for example `\enquotes`).
+   If not, then the control
+   sequences `\"` and `\'` are undefined. Remember, that they are used in
+   another meaning when the `\oldaccents` command is used.
+   The macros `\"` and `\'` are not defined as `\protected` because we need
+   their expansion when `\outlines` are created.
+   User can declare quotes by \^`\quoteschars``<clqq><crqq><clq><crq>`, where
+   `<clqq>...<crqq>` are normal quotes and `<clq>...<crq>` are alternative quotes.
+   or use \`\altquotes` to swap between the meaning of these two types of quotes.
+   \nl
+   \`\enquotes`, \`\csquotes`, \`\dequotes`, \`\frquotes` etc. are defined here.
+   \_cod -----------------------------
+
+\_def \_enquotes {\_quoteschars “”‘’}
+\_def \_csquotes {\_quoteschars „“‚‘}
+\_def \_frquotes {\_quoteschars “”«»}
+\_let \_plquotes = \_frquotes
+\_let \_esquotes = \_frquotes
+\_let \_grquotes = \_frquotes
+\_let \_ruquotes = \_frquotes
+\_let \_itquotes = \_frquotes
+\_let \_skquotes = \_csquotes
+\_let \_dequotes = \_csquotes
+
+   \_doc -----------------------------
+   The \`\quoteschars``<lqq><rqq><lq><rq>` defines `\"` and `\"` as `\_qqA`
+   in in normal mode and as expadable macros in outline mode.
+   We want to well process the common cases: \code{\\"`&`"} or \code{\\"`\{`"}.
+   This is the reason why the quotes parameter is read in verbatim mode and retokenized
+   again by `\scantextokens`. We want to allow to quote the quotes mark
+   itself by \code{\\"{`"`}"}. This is the reason why the sub-verbatim mode is
+   used when the first character is \code{\{} in the parameter.\nl
+   The `\"` is defined as `\_qqA\_qqB<lqq><rqq>` and `\'` as `\_qqA\_qqC<lq><rq>`.
+   The \`\_qqA``\_qqB<clqq><crqq>` runs \`\_qqB``<lqq><rqq><text>"`.\nl
+   The \`\_regquotes``\""<L><R>` does `\def\"#1"{<L>#1<R>}` for outlines but the `"`
+   separator is active (because `"` and `'` are active in \^`\pdfunidef`).
+   \_cod -----------------------------
+
+\_def \_quoteschars #1#2#3#4{\_def\_altquotes{\_quoteschars#3#4#1#2}\_public\altquotes;%
+   \_protected\_def \"{\_qqA\_qqB#1#2}\_protected\_def \'{\_qqA\_qqC#3#4}%
+   \_regmacro{}{}{\_regquotes\""#1#2\_regquotes\''#3#4}}
+
+\_def\_qqA#1#2#3{\_bgroup\_setverb \_catcode`\ =10
+   \_isnextchar\_bgroup{\_catcode`\{=1 \_catcode`\}=2 #1#2#3}{#1#2#3}}
+\_long\_def\_qqB#1#2#3"{\_egroup#1\_scantextokens{#3}#2}
+\_long\_def\_qqC#1#2#3'{\_egroup#1\_scantextokens{#3}#2}
+\_def\_regquotes#1#2#3#4{\_bgroup \_lccode`~=`#2\_lowercase{\_egroup \_def#1##1~}{#3##1#4}}
+
+   \_doc -----------------------------
+   Sometimes should be usable to leave the markup `"such"` or `'such'` i.e.~without
+   the first backslash. Then you can make the characters `"` and `'` active
+   by the \`\activequotes` macro and leave quotes without the first backslash.
+   First, declare `\<iso-code>quotes`, then \^`\altquotes` (if needed) and finally
+   \^`\activequotes`.
+   \_cod -----------------------------
+
+\_def\_activequotes{\_let\_actqq=\"\_adef"{\_actqq}\_let\_actq=\'\_adef'{\_actq}%
+   \_regmacro{}{}{\_adef"{\"}\_adef'{\'}}}
+
+\_public \quoteschars \activequotes \enquotes \csquotes \skquotes \frquotes \plquotes
+   \esquotes \grquotes \ruquotes \itquotes \dequotes ;
+
+   \_doc -----------------------------
+   Bibliography references generated by \^`\usebib` uses more
+   language-dependent phrases. They are declared here. We don't want to save
+   all these phrases into the format, so the trick with {`\_endinput`}
+   is used here. When \^`\usebib` is processed then the following part of the file
+   `languages.opm` is read again.
+
+   Only phrases of few languages are declared here now. If you want to declare
+   phrases of your language, please create an \"issue" or a \"request" at
+   \url{https://github.com/olsak/OpTeX} or send me an email with new
+   phrases for your language (or language you know:). I am ready to put them here.
+   Temporarily, you can put your definitions into `\bibtexhook` token list.
+   \_cod -----------------------------
+
+\_endinput  % don't save these \def's to the format
+
+\_def\_langb#1 #2#3#4#5#6#7#8#9{\_def\_mbib##1##2{\_sdef{_mt:bib.##2:#1}{##1}}%
+   \_mbib{#2}{and}\_mbib{#3}{etal}\_mbib{#4}{edition}\_mbib{#5}{citedate}\_mbib{#6}{volume}%
+   \_mbib{#7}{number}\_mbib{#8}{prepages}\_mbib{#9}{postpages}\_langbA}
+\_def\_langbA#1#2#3#4#5#6#7{\_mbib{#1}{editor}\_mbib{#2}{editors}\_mbib{#3}{available}%
+   \_mbib{#4}{availablealso}\_mbib{#5}{bachthesis}\_mbib{#6}{masthesis}\_mbib{#7}{phdthesis}}
+
+\_langb en {, and }  { et al.} { ed.} {cit.~} {Vol.~} {No.~} {pp.~} {~p.} {,~ed.} {,~eds.}
+           {Available from } {Available also from }
+           {Bachelor's Thesis} {Master's Thesis} {Ph.D. Thesis}
+%------------------------------------------------------------------------------------------
+\_langb cs { a } { a~kol.} { vyd.} {vid.~} {ročník~} {č.~} {s.~} {~s.} {,~editor} {,~editoři}
+           {Dostupné na } {Dostupné též na }
+           {Bakalářská práce} {Diplomová práce} {Disertační práce}
+\_langb sk { a } { a~kol.} { vyd.} {vid.~} {ročník~} {č.~} {s.~} {~s.} {,~editor} {,~editoři}
+           {Dostupné na } {Dostupné tiež na }
+           {Bakalárska práca} {Diplomová práca} {Dizertačná práca}
+
+% \_<lang>dateformat year/month/day\relax, for example: \_csdateformat 2020/05/21\relax
+% This is used in iso690 bib-style when the field "citedate" is used.
+
+\_def\_endateformat #1/#2/#3\relax{#1-#2-#3}
+% \_csdateformat 2020/05/21\relax -> \hbox{21. 5. 2020}
+\_def\_csdateformat #1/#2/#3\relax{\hbox{\_tmpnum=#3 \_the\_tmpnum. \_tmpnum=#2 \_the\_tmpnum. #1}}
+\_let\_skdateformat =\_csdateformat
+
+\_endcode % -------------------------------------
+
+2021-01-21 more robust quotes in outlines
+2020-12-05 bib phrases moved here
+2020-04-29 Obrazek -> Abbildung: bug fixed
+2020-03-15 introduced
diff --git a/Master/texmf-dist/tex/optex/base/lists.opm b/Master/texmf-dist/tex/optex/base/lists.opm
new file mode 100644
index 00000000000..189719302dd
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/lists.opm
@@ -0,0 +1,128 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \begitems {Lists: begitems, enditems <2021-03-10>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\_aboveliskip` is used above the list of items,\nl
+   \`\_belowliskip` is used below the list of items and\nl
+   \`\_interliskip` is used between items.\nl
+   \`\_listskipA` is used as `\listskipamount` at level 1 of items.\nl
+   \`\_listskipB` is used as `\listskipamount` at other levels.\nl
+   \`\_setlistskip` sets the skip dependent on the current level of items
+   \_cod -----------------------------
+
+\_def\_aboveliskip {\_removelastskip \_penalty-100 \_vskip\_listskipamount}
+\_def\_belowliskip {\_penalty-200 \_vskip\_listskipamount}
+\_def\_interliskip {}
+\_def\_listskipA {\_medskipamount}
+\_def\_listskipB {0pt plus.5\_smallskipamount}
+
+\_def\_setlistskip {%
+   \_ifnum \_ilevel = 1 \_listskipamount = \_listskipA \_relax
+   \_else  \_listskipamount = \_listskipB \_relax
+   \_fi}
+
+   \_doc -----------------------------
+   The \`\itemnum` is locally reset to zero in each group declared by
+   `\begitems`. So nested lists are numbered independently. Users can set
+   initial value of `\itemnum` to another value after `\beitems` if they want.
+   \nl
+   Each level of nested lists is indented by the new `\iindent` from left.
+   The default item mark is `\_printitem`.
+   \nl
+   The \`\begitems` runs `\_aboveliskip` only if we are not near below a title,
+   where a vertical skip is placed already and where the `\penalty` 11333 is.
+   It activates `*` and defines it as \`\_startitem`.
+   \nl
+   The \`\enditems` runs `\_isnextchar\_par{}{\_noindent}` thus the next
+   paragraph is without indentation if there is no empty line between
+   the list and this paragraph (it is similar behavior as after display math).
+   \_cod -----------------------------
+
+\_newcount\_itemnum  \_itemnum=0
+\_newtoks\_printitem
+
+\_def\_begitems{\_par
+  \_bgroup
+  \_advance \_ilevel by1
+  \_setlistskip
+  \_ifnum\_lastpenalty<10000 \_aboveliskip \_fi
+  \_itemnum=0 \_adef*{\_relax\_ifmmode*\_else\_ea\_startitem\_fi}
+  \_advance\_leftskip by\_iindent
+  \_printitem=\_defaultitem
+  \_the\_everylist \_relax
+}
+\_def\_enditems{\_par\_belowliskip\_egroup \_isnextchar\_par{}{\_noindent}}
+
+\_def\_startitem{\_par \_ifnum\_itemnum>0 \_interliskip \_fi
+   \_advance\_itemnum by1
+   \_the\_everyitem \_noindent\_llap{\_the\_printitem}\_ignorespaces
+}
+\_public \begitems \enditems \itemnum ;
+
+   \_doc ----------------------------
+   \`\novspaces` sets \`\listskipamount` to 0pt.
+   \_cod ----------------------------
+
+\_def\_novspaces {\_removelastskip \_listskipamount=0pt \_relax}
+\_public \novspaces ;
+
+   \_doc -----------------------------
+   Various item marks are saved in `\_item:<letter>` macros.
+   You can re-define then or define more such macros.
+   The \`\style` `<letter>` does \`\_printitem``={\_item:<letter>}`.
+   More exactly: \^`\begitems` does `\_printitem=`\^`\defaultitem` first,
+   then \`\style` `<letter>` does \`\_printitem``={\_item:<letter>}`
+   when it is used and finally, `\_startitem` alias `*` uses `\_printitem`.
+   \_cod -----------------------------
+
+\_def\_style#1{%
+   \_ifcsname _item:#1\_endcsname \_printitem=\ea{\_csname _item:#1\_endcsname}%
+   \_else \_printitem=\_defaultitem \_fi
+}
+\_sdef{_item:o}{\_raise.4ex\_hbox{$\_scriptscriptstyle\_bullet$} }
+\_sdef{_item:-}{- }
+\_sdef{_item:n}{\_the\_itemnum. }
+\_sdef{_item:N}{\_the\_itemnum) }
+\_sdef{_item:i}{(\_romannumeral\_itemnum) }
+\_sdef{_item:I}{\_uppercase\_ea{\_romannumeral\_itemnum}\_kern.5em}
+\_sdef{_item:a}{\_athe\_itemnum) }
+\_sdef{_item:A}{\_uppercase\_ea{\_athe\_itemnum}) }
+\_sdef{_item:x}{\_raise.3ex\_fullrectangle{.6ex}\_kern.4em}
+\_sdef{_item:X}{\_raise.2ex\_fullrectangle{1ex}\_kern.5em}
+
+   \_doc -----------------------------
+   \`\_athe``{<num>}` returns the `<num>`s lowercase letter from the alphabet.\nl
+   \`\_fullrectangle``{<dimen>}` prints full rectangle with given `<dimen>`.
+   \_cod -----------------------------
+
+\_def\_fullrectangle#1{\_hbox{\_vrule height#1 width#1}}
+
+\_def\_athe#1{\_ifcase#1?\_or a\_or b\_or c\_or d\_or e\_or f\_or g\_or h\_or
+   i\_or j\_or k\_or l\_or m\_or n\_or o\_or p\_or q\_or r\_or s\_or t\_or
+   u\_or v\_or w\_or x\_or y\_or z\_else ?\_fi
+}
+\_public \style ;
+
+   \_doc -----------------------------
+   The \`\begblock` macro selects fonts from footnotes \^`\_fnset`
+   and opens new indentation in a group.
+   \`\endblock` closes the group.
+   This is implemented as an counterpart
+   of Markdown's Blockquotes. Redefine these macros if you want to declare
+   different design.
+   The \ulink[http://petr.olsak.net/optex/optex-tricks.html\#greyblock]{\OpTeX/ trick 0031}
+   shows how to create blocks with grey background splittable to more pages.
+   \_cod -----------------------------
+
+\_def\_begblock{\_bgroup\_fnset \_medskip \_advance\_leftskip by\_iindent \_firstnoindent}
+\_def\_endblock{\_par\_medskip\_egroup\_isnextchar\_par{}{\_noindent}}
+
+\_public \begblock \endblock ;
+
+
+\_endcode % -------------------------------------
+
+2021-03-10 \_ifmmode*\_else\_ea\_startitem\_fi added to * defintition
+2020-04-21 \isnextchar\par added to \enditems
+2020-03-18 introduced
diff --git a/Master/texmf-dist/tex/optex/base/logos.opm b/Master/texmf-dist/tex/optex/base/logos.opm
new file mode 100644
index 00000000000..a510a74a304
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/logos.opm
@@ -0,0 +1,61 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \TeX {Logos TeX, LuaTeX, etc. <2020-02-28>} % preloaded in format
+
+   \_doc ----------------------------
+   Despite plain \TeX/ each macro for logos ends by \`\ignoreslash`.
+   This macro ignores the next slash if it is present.
+   You can `use \TeX/ like this` for protecting the space following the logo.
+   This is visually more comfortable.
+   The macros \`\TeX`, \`\OpTeX`, \`\LuaTeX`, \`\XeTeX` are defined.
+   \_cod ----------------------------
+
+\_protected\_def \_TeX {T\_kern-.1667em\_lower.5ex\_hbox{E}\_kern-.125emX\_ignoreslash}
+\_protected\_def \_OpTeX {Op\_kern-.1em\_TeX}
+\_protected\_def \_LuaTeX {Lua\_TeX}
+\_protected\_def \_XeTeX {X\_kern-.125em\_phantom E%
+   \_pdfsave\_rlap{\_pdfscale{-1}{1}\_lower.5ex\_hbox{E}}\_pdfrestore \_kern-.1667em \_TeX}
+
+\_def\_ignoreslash {\_isnextchar/\_ignoreit{}}
+
+\_public \TeX \OpTeX \LuaTeX \XeTeX \ignoreslash ;
+
+   \_doc -----------------------------
+   The \`\_slantcorr` macro expands to the slant-correction of the current font. It is
+   used to shifting A if the \`\LaTeX` logo is in italic.
+   \_cod -----------------------------
+
+\_protected\_def \_LaTeX{\_tmpdim=.42ex L\_kern-.36em \_kern \_slantcorr % slant correction
+  \_raise \_tmpdim \_hbox{\_thefontscale[710]A}%
+  \_kern-.15em \_kern-\_slantcorr \_TeX}
+\_def\_slantcorr{\_ea\_ignorept \_the\_fontdimen1\_font\_tmpdim}
+
+\_public \LaTeX ;
+
+   \_doc -----------------------------
+   \`\OPmac`, \`\CS` and \`\csplain` logos.
+   \_cod -----------------------------
+
+\_def\_OPmac{\_leavevmode
+   \_lower.2ex\_hbox{\_thefontscale[1400]O}\_kern-.86em P{\_em mac}\_ignoreslash}
+\_def\_CS{$\_cal C$\_kern-.1667em\_lower.5ex\_hbox{$\_cal S$}\_ignoreslash}
+\_def\_csplain{\_CS plain\_ignoreslash}
+
+\_public \OPmac \CS \csplain ;
+
+   \_doc ----------------------------
+   The expandable versions of logos used in Outlines need the expandable
+   \`\ingnslash` (instead of the \^`\ignoreslash`).
+   \_cod \_fin ----------------------
+
+\_def\_ignslash#1{\_ifx/#1\_else #1\_fi}
+\_regmacro {}{}{% conversion for PDF outlines
+   \_def\TeX{TeX\_ignslash}\_def\OpTeX{OpTeX\_ignslash}%
+   \_def\LuaTeX{LuaTeX\_ignslash}\_def\XeTeX{XeTeX\_ignslash}%
+   \_def\LaTeX{LaTeX\_ignslash}\_def\OPmac{OPmac\_ignslash}%
+   \_def\CS{CS}\_def\csplain{csplain\_ignslash}%
+}
+\_public \ignslash ;
+
+\_endcode
+
diff --git a/Master/texmf-dist/tex/optex/base/luatex-ini.opm b/Master/texmf-dist/tex/optex/base/luatex-ini.opm
new file mode 100644
index 00000000000..e0526a48d61
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/luatex-ini.opm
@@ -0,0 +1,136 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \pdfprimitive {LuaTeX initialization code <2020-02-21>} % preloaded in format
+
+\_let\_pdfpagewidth        \pagewidth
+\_let\_pdfpageheight       \pageheight
+\_let\_pdfadjustspacing    \adjustspacing
+\_let\_pdfprotrudechars    \protrudechars
+\_let\_pdfnoligatures      \ignoreligaturesinfont
+\_let\_pdffontexpand       \expandglyphsinfont
+\_let\_pdfcopyfont         \copyfont
+\_let\_pdfxform            \saveboxresource
+\_let\_pdflastxform        \lastsavedboxresourceindex
+\_let\_pdfrefxform         \useboxresource
+\_let\_pdfximage           \saveimageresource
+\_let\_pdflastximage       \lastsavedimageresourceindex
+\_let\_pdflastximagepages  \lastsavedimageresourcepages
+\_let\_pdfrefximage        \useimageresource
+\_let\_pdfsavepos          \savepos
+\_let\_pdflastxpos         \lastxpos
+\_let\_pdflastypos         \lastypos
+\_let\_pdfoutput           \outputmode
+\_let\_pdfdraftmode        \draftmode
+\_let\_pdfpxdimen          \pxdimen
+\_let\_pdfinsertht         \insertht
+\_let\_pdfnormaldeviate    \normaldeviate
+\_let\_pdfuniformdeviate   \uniformdeviate
+\_let\_pdfsetrandomseed    \setrandomseed
+\_let\_pdfrandomseed       \randomseed
+\_let\_pdfprimitive        \primitive
+\_let\_ifpdfprimitive      \ifprimitive
+\_let\_ifpdfabsnum         \ifabsnum
+\_let\_ifpdfabsdim         \ifabsdim
+
+\_public
+   \pdfpagewidth \pdfpageheight \pdfadjustspacing \pdfprotrudechars
+   \pdfnoligatures \pdffontexpand \pdfcopyfont \pdfxform \pdflastxform
+   \pdfrefxform \pdfximage \pdflastximage \pdflastximagepages \pdfrefximage
+   \pdfsavepos \pdflastxpos \pdflastypos \pdfoutput \pdfdraftmode \pdfpxdimen
+   \pdfinsertht \pdfnormaldeviate \pdfuniformdeviate \pdfsetrandomseed
+   \pdfrandomseed \pdfprimitive \ifpdfprimitive \ifpdfabsnum \ifpdfabsdim ;
+
+\_directlua {tex.enableprimitives('pdf',{'tracingfonts'})}
+
+\_protected\_def \_pdftexversion     {\_numexpr 140\_relax}
+           \_def \_pdftexrevision    {7}
+\_protected\_def \_pdflastlink       {\_numexpr\_pdffeedback lastlink\_relax}
+\_protected\_def \_pdfretval         {\_numexpr\_pdffeedback retval\_relax}
+\_protected\_def \_pdflastobj        {\_numexpr\_pdffeedback lastobj\_relax}
+\_protected\_def \_pdflastannot      {\_numexpr\_pdffeedback lastannot\_relax}
+           \_def \_pdfxformname      {\_pdffeedback xformname}
+{\_outputmode=1
+           \_xdef\_pdfcreationdate   {\_pdffeedback creationdate}
+}
+           \_def \_pdffontname       {\_pdffeedback fontname}
+           \_def \_pdffontobjnum     {\_pdffeedback fontobjnum}
+           \_def \_pdffontsize       {\_pdffeedback fontsize}
+           \_def \_pdfpageref        {\_pdffeedback pageref}
+           \_def \_pdfcolorstackinit {\_pdffeedback colorstackinit}
+\_protected\_def \_pdfliteral        {\_pdfextension literal}
+\_protected\_def \_pdfcolorstack     {\_pdfextension colorstack}
+\_protected\_def \_pdfsetmatrix      {\_pdfextension setmatrix}
+\_protected\_def \_pdfsave           {\_pdfextension save\_relax}
+\_protected\_def \_pdfrestore        {\_pdfextension restore\_relax}
+\_protected\_def \_pdfobj            {\_pdfextension obj }
+\_protected\_def \_pdfrefobj         {\_pdfextension refobj }
+\_protected\_def \_pdfannot          {\_pdfextension annot }
+\_protected\_def \_pdfstartlink      {\_pdfextension startlink }
+\_protected\_def \_pdfendlink        {\_pdfextension endlink\_relax}
+\_protected\_def \_pdfoutline        {\_pdfextension outline }
+\_protected\_def \_pdfdest           {\_pdfextension dest }
+\_protected\_def \_pdfthread         {\_pdfextension thread }
+\_protected\_def \_pdfstartthread    {\_pdfextension startthread }
+\_protected\_def \_pdfendthread      {\_pdfextension endthread\_relax}
+\_protected\_def \_pdfinfo           {\_pdfextension info }
+\_protected\_def \_pdfcatalog        {\_pdfextension catalog }
+\_protected\_def \_pdfnames          {\_pdfextension names }
+\_protected\_def \_pdfincludechars   {\_pdfextension includechars }
+\_protected\_def \_pdffontattr       {\_pdfextension fontattr }
+\_protected\_def \_pdfmapfile        {\_pdfextension mapfile }
+\_protected\_def \_pdfmapline        {\_pdfextension mapline }
+\_protected\_def \_pdftrailer        {\_pdfextension trailer }
+\_protected\_def \_pdfglyphtounicode {\_pdfextension glyphtounicode }
+
+\_protected\_edef\_pdfcompresslevel       {\_pdfvariable compresslevel}
+\_protected\_edef\_pdfobjcompresslevel    {\_pdfvariable objcompresslevel}
+\_protected\_edef\_pdfdecimaldigits       {\_pdfvariable decimaldigits}
+\_protected\_edef\_pdfgamma               {\_pdfvariable gamma}
+\_protected\_edef\_pdfimageresolution     {\_pdfvariable imageresolution}
+\_protected\_edef\_pdfimageapplygamma     {\_pdfvariable imageapplygamma}
+\_protected\_edef\_pdfimagegamma          {\_pdfvariable imagegamma}
+\_protected\_edef\_pdfimagehicolor        {\_pdfvariable imagehicolor}
+\_protected\_edef\_pdfimageaddfilename    {\_pdfvariable imageaddfilename}
+\_protected\_edef\_pdfpkresolution        {\_pdfvariable pkresolution}
+\_protected\_edef\_pdfinclusioncopyfonts  {\_pdfvariable inclusioncopyfonts}
+\_protected\_edef\_pdfinclusionerrorlevel {\_pdfvariable inclusionerrorlevel}
+\_protected\_edef\_pdfgentounicode        {\_pdfvariable gentounicode}
+\_protected\_edef\_pdfpagebox             {\_pdfvariable pagebox}
+\_protected\_edef\_pdfminorversion        {\_pdfvariable minorversion}
+\_protected\_edef\_pdfuniqueresname       {\_pdfvariable uniqueresname}
+\_protected\_edef\_pdfhorigin             {\_pdfvariable horigin}
+\_protected\_edef\_pdfvorigin             {\_pdfvariable vorigin}
+\_protected\_edef\_pdflinkmargin          {\_pdfvariable linkmargin}
+\_protected\_edef\_pdfdestmargin          {\_pdfvariable destmargin}
+\_protected\_edef\_pdfthreadmargin        {\_pdfvariable threadmargin}
+\_protected\_edef\_pdfpagesattr           {\_pdfvariable pagesattr}
+\_protected\_edef\_pdfpageattr            {\_pdfvariable pageattr}
+\_protected\_edef\_pdfpageresources       {\_pdfvariable pageresources}
+\_protected\_edef\_pdfxformattr           {\_pdfvariable xformattr}
+\_protected\_edef\_pdfxformresources      {\_pdfvariable xformresources}
+\_protected\_edef\_pdfpkmode              {\_pdfvariable pkmode}
+
+\_public
+   \pdftexversion \pdftexrevision \pdflastlink \pdfretval \pdflastobj
+   \pdflastannot \pdfxformname \pdfcreationdate \pdffontname \pdffontobjnum
+   \pdffontsize \pdfpageref \pdfcolorstackinit \pdfliteral \pdfcolorstack
+   \pdfsetmatrix \pdfsave \pdfrestore \pdfobj \pdfrefobj \pdfannot
+   \pdfstartlink \pdfendlink \pdfoutline \pdfdest \pdfthread \pdfstartthread
+   \pdfendthread \pdfinfo \pdfcatalog \pdfnames \pdfincludechars \pdffontattr
+   \pdfmapfile \pdfmapline \pdftrailer \pdfglyphtounicode \pdfcompresslevel
+   \pdfobjcompresslevel \pdfdecimaldigits \pdfgamma \pdfimageresolution
+   \pdfimageapplygamma \pdfimagegamma \pdfimagehicolor \pdfimageaddfilename
+   \pdfpkresolution \pdfinclusioncopyfonts \pdfinclusionerrorlevel
+   \pdfgentounicode \pdfpagebox \pdfminorversion \pdfuniqueresname \pdfhorigin
+   \pdfvorigin \pdflinkmargin \pdfdestmargin \pdfthreadmargin \pdfpagesattr
+   \pdfpageattr \pdfpageresources \pdfxformattr \pdfxformresources \pdfpkmode ;
+
+\_pdfminorversion     = 5
+\_pdfobjcompresslevel = 2
+\_pdfcompresslevel    = 9
+\_pdfdecimaldigits    = 3
+\_pdfpkresolution     = 600
+
+\_endcode
+
+Common pdf\TeX/ primitives equivalents are declared here. Initial values are set.
diff --git a/Master/texmf-dist/tex/optex/base/makeindex.opm b/Master/texmf-dist/tex/optex/base/makeindex.opm
new file mode 100644
index 00000000000..e5f7b4032e4
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/makeindex.opm
@@ -0,0 +1,463 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \makeindex {Makeindex and sorting <2021-02-15>} % loaded in format
+
+   \_doc -----------------------------
+   \^`\makeindex` implements sorting algorithm at \TeX/ macro-language level.
+   You need not any external program.
+
+   There are two passes in the sorting algorithm. The primary pass does not
+   distinguish between a group of letters (typically non-accented and
+   accented). If the result of comparing two string is equal in primary pass
+   then the secondary pass is started. It distinguishes between variously accented
+   letters. Czech rules, for example, says: not accented before dieresis
+   before acute before circumflex before ring. At less priority: lowercase
+   letters must be before uppercase letters.
+
+   The \`\_sortingdata``<iso-code>` implements these rules for the language
+   <iso-code>. The groups between commas are not distinguished in the first
+   pass. The second pass distinguishes all characters mentioned in the
+   `\_sortingdata<iso-code>` (commas are ignored). The order of letters
+   in the `\_sortingdata<iso-code>` macro is significant for the sorting algorithm.
+   The Czech rules (`cs`) are implemented here:
+   \_cod -----------------------------
+
+\_def \_sortingdatacs {%
+  /,{ },-,&,@,%
+  aAäÄáÁ,%
+  bB,%
+  cC,%
+  čČ,%
+  dDďĎ,%
+  eEéÉěĚ,%
+  fF,%
+  gG,%
+  hH,%
+  ^^T^^U^^V,% ch Ch CH
+  iIíÍ,%
+  jJ,%
+  kK,%
+  lLĺĹľĽ,%
+  mM,%
+  nNňŇ,%
+  oOöÖóÓôÔ,%
+  pP,%
+  qQ,%
+  rRŕŔ,%
+  řŘ,%
+  sS,%
+  šŠ,%
+  tTťŤ,%
+  uUüÜúÚůŮ,%
+  vV,%
+  wW,%
+  xX,%
+  yYýÝ,%
+  zZ,%
+  žŽ,%
+  0,1,2,3,4,5,6,7,8,9,'%
+}
+
+   \_doc -----------------------------
+   Characters ignored by the sorting algorithm are declared in \`\_ignoredchars``<iso-code>`.
+   The compound characters (two or more characters interpreted as one
+   character in the sorting algorithm) are mapped to single invisible characters
+   in \`\_compoundchars``<iso-code>`. Czech rules declare ch or Ch or CH as
+   a single letter sorted between H and I. See \`\_sortingdatacs` above where
+   these declared characters are used.
+
+   The characters declared in `\_ignoredchars` are ignored in the first pass
+   without additional condition. All characters are taken into account in
+   second pass: ASCII characters with code $\string<65$ are sorted first if they
+   are not mentioned in the `\_sortingdata<iso-code>` macro.
+   Others not mentioned characters have undefined behavior during sorting.
+   \_cod -----------------------------
+
+\_def \_ignoredcharscs  {.,;?!:'"|()[]<>=+}
+\_def \_compoundcharscs {ch:^^T Ch:^^U CH:^^V} % DZ etc. are sorted normally
+
+   \_doc -----------------------------
+   Slovak sorting rules are the same as Czech. The macro `\_sortingdatacs`
+   includes Slovak letters too. Compound characters are the same.
+   English sorting rules can be defined by `\_sortingdatacs` too because
+   English alphabet is a subset of the Czech and Slovak alphabets. Only
+   difference: \`\_compoundcharsen` is empty in English rules.
+
+   You can declare these macros for more languages if you wish to use
+   `\makeindex` with sorting rules with respect to your language.
+   Note: if you need to map compound characters to a character, don't use
+   `^^I` or `^^M` because these characters have very specific category codes.
+   And use space to separate more mappings, like in \`\_compoundcharscs` above.
+   \_cod -----------------------------
+
+\_let \_sortingdatask = \_sortingdatacs
+\_let \_compoundcharssk = \_compoundcharscs
+\_let \_ignoredcharssk = \_ignoredcharscs
+\_let \_sortingdataen = \_sortingdatacs
+\_def \_compoundcharsen {}
+\_let \_ignoredcharsen = \_ignoredcharscs
+
+   \_doc -----------------------------
+   Preparing to primary pass is implemented by the \`\_setprimarysorting` macro.
+   It is called from `\makeindex` macro and all processing of sorting is in a group.
+   \_cod -----------------------------
+
+\_def\_setprimarysorting {%
+   \_ea\_let \_ea\_sortingdata \_csname _sortingdata\_sortinglang\_endcsname
+   \_ea\_let \_ea\_compoundchars \_csname _compoundchars\_sortinglang\_endcsname
+   \_ea\_let \_ea\_ignoredchars \_csname _ignoredchars\_sortinglang\_endcsname
+   \_ifx \_sortingdata\_relax \_addto\_nold{ sortingdata}%
+       \_let \_sortingdata = \_sortingdataen \_fi
+   \_ifx \_compoundchars\_relax \_addto\_nold{ compoundchars}%
+       \_let \_compoundchars = \_compoundcharsen \_fi
+   \_ifx \_ignoredchars\_relax \_addto\_nold{ ignoredchars}%
+       \_let \_ignoredchars = \_ignoredcharsen \_fi
+   \_ifx \_compoundchars\_empty \_else
+      \_edef \_compoundchars {\_detokenize\_ea{\_compoundchars} }\_fi % all must be catcode 12
+   \_def \_act ##1{\_ifx##1\_relax \_else
+      \_ifx##1,\_advance\_tmpnum by1
+      \_else \_lccode`##1=\_tmpnum \_fi
+      \_ea\_act \_fi}%
+   \_tmpnum=65 \_ea\_act \_sortingdata \_relax
+   \_def \_act ##1{\_ifx##1\_relax \_else
+      \_lccode`##1=`\^^I
+      \_ea\_act \_fi}%
+   \_ea\_act \_ignoredchars \_relax
+}
+
+   \_doc -----------------------------
+   Preparing to secondary pass is implemented by the \`\_setsecondarysorting` macro.
+   \_cod -----------------------------
+
+\_def\_setsecondarysorting {%
+   \_def \_act ##1{\_ifx##1\_relax \_else
+      \_ifx##1,\_else \_advance\_tmpnum by1 \_lccode`##1=\_tmpnum \_fi
+      \_ea\_act \_fi}%
+  \_tmpnum=64 \_ea\_act \_sortingdata \_relax
+}
+
+   \_doc -----------------------------
+   Strings to be sorted are prepared in `\,<string>` control sequences
+   (to save `\TeX` memory).
+   The \`\_preparesorting` `\,<string>` converts `<string>` to `\_tmpb`
+   with respect to the data initialized in \^`\_setprimarysorting` or
+   \^`\_setsecondarysorting`.\nl
+   The compoud characters are converted to single characters by the
+   \`\_docompound` macro.
+   \_cod -----------------------------
+
+\_def \_preparesorting #1{%
+   \_edef \_tmpb {\_ea\_ignorefirst\_csstring #1}% \,<string> -> <string>
+   \_ea \_docompound \_compoundchars \_relax:{}       % replace compound characters
+   \_lowercase \_ea{\_ea\_def \_ea\_tmpb \_ea{\_tmpb}}% convert in respect to \_sortingdata
+   \_ea\_replstring \_ea\_tmpb \_ea{\_csstring\^^I}{}% remove ignored characters
+}
+\_def \_docompound #1:#2 {%
+   \_ifx\_relax#1\_else \_replstring\_tmpb {#1}{#2}\_ea\_docompound \_fi
+}
+\_def \_ignorefirst#1{}
+
+   \_doc -----------------------------
+   Macro \`\_isAleB` `\,<string1> \,<string2>` returns the result of comparison
+   of given two strings to \`\_ifAleB` control sequence. Usage:
+   `\isAleB \,<string1> \,<string2> \_ifAleB ... \_else ... \_fi`
+   The converted strings (in respect of the data prepared for first pass)
+   must be saved as values of `\,<string1>` and `\,<string2>` macros.
+   The reason is speed:  we don't want to convert them repeatedly in each
+   comparison.
+   \nl
+   The macro
+   \`\_testAleB` `<converted string1>&\_relax<converted-string2>\_relax \,<string1>\,<string2>`\nl
+   does the real work. It reads the first character from both converted strings, compares them
+   and if it is equal then calls itself recursively else gives the result.
+   \_cod -----------------------------
+
+\_newifi \_ifAleB
+
+\_def\_isAleB #1#2{%
+   \_edef\_tmpb {#1&\_relax#2&\_relax}%
+   \_ea \_testAleB \_tmpb #1#2%
+}
+\_def\_testAleB #1#2\_relax #3#4\_relax #5#6{%
+  \_if #1#3\_if #1&\_testAleBsecondary #5#6%   goto to the second pass::
+          \_else \_testAleB #2\_relax #4\_relax #5#6%
+          \_fi
+  \_else \_ifnum `#1<`#3 \_AleBtrue \_else \_AleBfalse \_fi
+  \_fi
+}
+\_def\_testAleBsecondary#1#2{%
+  \_bgroup
+     \_setsecondarysorting
+     \_preparesorting#1\_let\_tmpa=\_tmpb \_preparesorting#2%
+     \_edef\_tmpb{\_tmpa0\_relax\_tmpb1\_relax}%
+     \_ea\_testAleBsecondaryX \_tmpb
+  \_egroup
+}
+\_def\_testAleBsecondaryX #1#2\_relax #3#4\_relax {%
+   \_if #1#3\_testAleBsecondaryX #2\_relax #4\_relax
+   \_else \_ifnum `#1<`#3 \_global\_AleBtrue \_else \_global \_AleBfalse \_fi
+   \_fi
+}
+
+   \_doc -----------------------------
+   Merge sort is very effectively implemented by \TeX/ macros. The following
+   code is created by my son Miroslav.
+   The \`\_mergesort` macro expects that all items in `\_iilist` are separated
+   by a comma when it starts. It ends with sorted items in `\_iilist` without commas.
+   So `\_dosorting` macro must prepare commas between items.
+   \_cod -----------------------------
+
+\_def\_mergesort #1#2,#3{% by Miroslav Olsak
+   \_ifx,#1%                      % prazdna-skupina,neco,  (#2=neco #3=pokracovani)
+      \_addto\_iilist{#2,}%        % dvojice skupin vyresena
+      \_sortreturn{\_fif\_mergesort#3}%   % \mergesort pokracovani
+   \_fi
+   \_ifx,#3%                      % neco,prazna-skupina,  (#1#2=neco #3=,)
+      \_addto\_iilist{#1#2,}%      % dvojice skupin vyresena
+      \_sortreturn{\_fif\_mergesort}%      % \mergesort dalsi
+   \_fi
+   \_ifx\_end#3%                   % neco,konec (#1#2=neco)
+      \_ifx\_empty\_iilist                % neco=kompletni setrideny seznam
+         \_def\_iilist{#1#2}%
+         \_sortreturn{\_fif\_fif\_gobbletoend}%   % koncim
+      \_else                      % neco=posledni skupina nebo \end
+         \_sortreturn{\_fif\_fif       % spojim \indexbuffer+necoa cele znova
+                      \_edef\_iilist{\_ea}\_ea\_mergesort\_iilist#1#2,#3}%
+   \_fi\_fi                      % zatriduji: p1+neco1,p2+neco2, (#1#2=p1+neco1 #3=p2)
+   \_isAleB #1#3\_ifAleB         % p1<p2
+      \_addto\_iilist{#1}%       % p1 do bufferu
+      \_sortreturn{\_fif\_mergesort#2,#3}%         % \mergesort neco1,p2+neco2,
+   \_else                       % p1>p2
+      \_addto\_iilist{#3}%       % p2 do bufferu
+      \_sortreturn{\_fif\_mergesort#1#2,}%         % \mergesort p1+neco1,neco2,
+   \_fi
+   \_relax % zarazka, na ktere se zastavi \sortreturn
+}
+\_def\_sortreturn#1#2\_fi\_relax{#1} \_def\_fif{\_fi}
+\_def\_gobbletoend #1\_end{}
+
+   \_doc -----------------------------
+   The \`\_dosorting` `\list` macro redefines `\list` as sorted `\list`.
+   The `\list` have to include control sequences in the form `\<c><string>`.
+   These control sequences will be sorted with respect to <strings> without
+   change of meanings of these control sequences. Their meanings are
+   irrelevant when sorting. The first character <c> in `\<c><string>` should
+   be whatever. It does not influence the sorting. \OpTeX/ uses comma at
+   this place for sorting indexes: `\,<word1> \,<word2> \,<word3> ...`.
+
+   The actual language (chosen for hyphenation patterns) is used for
+   sorting data. If the `\_sortinglang` macro
+   is defined as `<iso-code>`(for example `\def\sortinglang{de}`)
+   then this has precedence and actual language is not used.
+   Moreover, if you specify \`\_asciisortingtrue` then ASCII
+   sorting will be processed and all language sorting data will be ignored.
+   \_cod -----------------------------
+
+\_newifi \_ifasciisorting  \_asciisortingfalse
+\_def\_dosorting #1{%
+   \_begingroup
+     \_def\_nold{}%
+     \_ifx\_sotringlang\_undefined \_edef\_sortinglang{\_cs{_lan:\_the\_language}}\_fi
+      \_ifasciisorting
+          \_edef\_sortinglang{ASCII}%
+          \_def \_preparesorting##1{\_edef\_tmpb{\_ea\_ignorefirst\_csstring##1}}%
+          \_let \_setsecondarysorting=\_relax
+      \_else
+         \_setprimarysorting
+      \_fi
+      \_message{OpTeX: Sorting \_string#1 (\_sortinglang) ...^^J}%
+      \_ifx\_nold\_empty\_else \_opwarning{Missing\_nold\_space for language (\_sortinglang)}\_fi
+      \_def \_act##1{\_preparesorting ##1\_edef##1{\_tmpb}}%
+      \_ea\_xargs \_ea\_act #1;%
+      \_def \_act##1{\_addto #1{##1,}}%
+      \_edef #1{\_ea}\_ea\_xargs \_ea\_act #1;%
+      \_edef \_iilist{\_ea}\_ea\_mergesort #1\_end,\_end
+   \_ea\_endgroup
+   \_ea\_def\_ea#1\_ea{\_iilist}%
+}
+
+   \_doc -----------------------------
+   The \`\makeindex` prints the index. First, it sorts the `\_iilist`
+   second, it prints the sorted `\_iilist`, each item is printed
+   using \^`\_printindexitem`.
+   \_cod -----------------------------
+
+\_def\_makeindex{\_par
+  \_ifx\_iilist\_empty \_opwarning{index data-buffer is empty. TeX me again}%
+  \_incr\_unresolvedrefs
+  \_else
+    \_dosorting \_iilist % sorting \_iilist
+    \_bgroup
+       \_rightskip=0pt plus1fil \_exhyphenpenalty=10000 \_leftskip=\_iindent
+       \_ea\_xargs \_ea\_printindexitem \_iilist ;\_par
+    \_egroup
+  \_fi
+}
+\_public \makeindex ;
+
+   \_doc -----------------------------
+   The \`\_printindexitem` `\,<word>` prints one item to the index.
+   If `\_,<word>` is defined then this is used instead real <word>
+   (this exception is declared by `\iis` macro). Else <word> is printed by
+   \^`\_printii`. Finally, \^`\_printiipages` prints the value of `\,<word>`,
+   i.e. the list of pages.
+   \_cod -----------------------------
+
+\_def\_printindexitem #1{%
+   \_ifcsname _\_csstring #1\_endcsname
+      \_ea\_ea\_ea \_printii \_csname _\_csstring #1\_endcsname &%
+   \_else
+      \_ea\_ea\_ea\_printii \_ea\_ignorefirst \_csstring #1&%
+   \_fi
+   \_ea\_printiipages #1&
+}
+
+   \_doc -----------------------------
+   \`\_printii` `<word>&` does more intelligent work because we are working with
+    words in the form `<main-word>/<sub-word>/<sub-sub-word>`.
+    The \^`\everyii` tokens register is applied before `\noindent`. User can
+    declare something special here.
+
+   The \`\_newiiletter``{<letter>}` macro is empty by default. It is invoked if first
+   letter of index entries is changed. You can declare a design between
+   index entries here. You can try, for example:
+   \begtt
+   \def\_newiiletter#1#2{%
+       \bigskip \hbox{\setfontsize{at15pt}\bf\uppercase{#1}}\medskip}
+   \endtt
+   \_cod -----------------------------
+
+\_def\_printii #1#2&{%
+   \_ismacro\_lastii{#1}\_iffalse \_newiiletter{#1}{#2}\_def\_lastii{#1}\_fi
+   \_gdef\_currii{#1#2}\_the\_everyii\_noindent
+   \_hskip-\_iindent \_ignorespaces\_printiiA#1#2//}
+\_def\_printiiA #1/{\_if^#1^\_let\_previi=\_currii \_else
+   \_ea\_scanprevii\_previi/&\_edef\_tmpb{\_detokenize{#1}}%
+   \_ifx\_tmpa\_tmpb \_iiemdash \_else#1 \_gdef\_previi{}\_fi
+   \_ea\_printiiA\_fi
+}
+\_def\_iiemdash{\_kern.1em---\_space}
+\_def\_lastii{}
+\_def\_newiiletter#1#2{}
+
+\_def\_scanprevii#1/#2&{\_def\_previi{#2}\_edef\_tmpa{\_detokenize{#1}}}
+\_def\_previi{} % previous index item
+
+   \_doc -----------------------------
+   \`\_printiipages` `<pglist>&` gets `<pglist>` in the form
+   `<pg>:<type>,<pg>:<type>,...<pg>:<type>` and it converts them to
+   `<pg>, <pg>, <from>--<to>, <pg>` etc. The same pages must be printed only once
+   and continuous consequences of pages must be compressed to the form <from>-<to>.
+   Moreover, the consequence is continuous only if all pages have the same <type>.
+   Empty <type> is most common, pages with `b` <type> must be printed as bold
+   and with `i` `<type>` as italics.
+   Moreover, the `<pg>` mentioned here are <gpageno>, but we have to print
+   <pageno>. The following macros solve these tasks.
+   \_cod -----------------------------
+
+\_def\_printiipages#1&{\_let\_pgtype=\_undefined \_tmpnum=0 \_printpages #1,:,\_par}
+\_def\_printpages#1:#2,{%  state automaton for compriming pages
+   \_ifx,#1,\_uselastpgnum
+   \_else \_def\_tmpa{#2}%
+      \_ifx\_pgtype\_tmpa \_else
+         \_let\_pgtype=\_tmpa
+         \_uselastpgnum \_usepgcomma \_pgprint#1:{#2}%
+         \_tmpnum=#1 \_returnfi \_fi
+      \_ifnum\_tmpnum=#1 \_returnfi \_fi
+      \_advance\_tmpnum by1
+      \_ifnum\_tmpnum=#1 \_ifx\_lastpgnum\_undefined \_usepgdash\_fi
+                         \_edef\_lastpgnum{\_the\_tmpnum:{\_pgtype}}%
+                         \_returnfi \_fi
+      \_uselastpgnum \_usepgcomma \_pgprint#1:{#2}%
+      \_tmpnum=#1
+      \_relax
+   \_ea\_printpages \_fi
+}
+\_def\_returnfi #1\_relax{\_fi}
+\_def\_uselastpgnum{\_ifx\_lastpgnum\_undefined
+   \_else \_ea\_pgprint\_lastpgnum \_let\_lastpgnum=\_undefined \_fi
+}
+\_def\_usepgcomma{\_ifnum\_tmpnum>0, \_fi} % comma+space between page numbers
+\_def\_usepgdash{\_hbox{--}}               % dash in the <from>--<to> form
+
+   \_doc -----------------------------
+   You can re-define \`\_pgprint` `<gpageno>:{<iitype>}`
+   if you need to implement more <iitypes>.
+   \_cod -----------------------------
+
+\_def\_pgprint #1:#2{%
+   \_ifx ,#2,\_pgprintA{#1}\_returnfi \_fi
+   \_ifx b#2{\_bf \_pgprintA{#1}}\_returnfi \_fi
+   \_ifx i#2{\_it \_pgprintA{#1}}\_returnfi \_fi
+   \_ifx u#2\_pgu{\_pgprintA{#1}}\_returnfi \_fi
+  \_pgprintA{#1}\_relax
+}
+\_def\_pgprintA #1{\_ilink[pg:#1]{\_cs{_pgi:#1}}} % \ilink[pg:<gpageno>]{<pageno>}
+\_def\_pgu#1{\_leavevmode\_vtop{\_hbox{#1}\kern.3ex\_hrule}}
+
+   \_doc -----------------------------
+   The \`\iindex``{<word>}` puts one <word> to the index. It writes
+   \^`\_Xindex``{<word>}{<iitype>}` to the `.ref` file.
+   All other variants of indexing macros expand internally to `\iindex`.
+   \_cod -----------------------------
+
+\_def\_iindex#1{\_isempty{#1}\_iffalse
+   \_openref{\_def~{ }\_ewref\_Xindex{{#1}{\_iitypesaved}}}\_fi}
+\_public \iindex ;
+
+   \_doc -----------------------------
+   The \`\_Xindex``{<word>}{<iitype>}` stores `\,<word>` to the `\_iilist` if
+   there is the first occurrence of the <word>. The list of pages where `<word>`
+   occurs, is the value of the macro `\,<word>`, so the `<gpageno>:<iitype>`
+   is appended to this list.
+   Moreover, we need a mapping from <gpageno> to `<pageno>`, because we print
+   `<pageno>` in the index, but hyperlinks are implemented by `<gpageno>`.
+   So, the macro `\_pgi:<gpageno>` is defined as `<pageno>`.
+   \_cod -----------------------------
+
+\_def \_iilist {}
+\_def \_Xindex #1#2{\_ea\_XindexA \_csname ,#1\_ea\_endcsname \_currpage {#2}}
+\_def \_XindexA #1#2#3#4{% #1=\,<word> #2=<gpageno> #3=<pageno> #4=<iitype>
+   \_ifx#1\_relax \_global\_addto \_iilist {#1}%
+                 \_gdef #1{#2:#4}%
+   \_else \_global\_addto #1{,#2:#4}%
+   \_fi
+   \_sxdef{_pgi:#2}{#3}%
+}
+
+   \_doc -----------------------------
+   The implementation of macros \`\ii`, \`\iid`, \`\iis` follows.
+   Note that `\ii` works in the horizontal mode in order to the `\write` whatsit
+   is not broken from the following word. If you need to keep vertical mode,
+   use \^`\iindex``{<word>}` directly.
+   \nl
+   The \`\iitype` `{<type>}` saves the `<type>` to the \`\_iitypesaved` macro. It is
+   used in the \^`\iindex` macro.
+   \_cod -----------------------------
+
+\_def\_ii #1 {\_leavevmode\_def\_tmp{#1}\_iiA #1,,\_def\_iitypesaved{}}
+
+\_def\_iiA #1,{\_if$#1$\_else\_def\_tmpa{#1}%
+   \_ifx\_tmpa\_iiatsign \_ea\_iiB\_tmp,,\_else\_iindex{#1}\_fi
+   \_ea\_iiA\_fi}
+\_def\_iiatsign{@}
+
+\_def\_iiB #1,{\_if$#1$\_else \_iiC#1/\_relax \_ea\_iiB\_fi}
+\_def\_iiC #1/#2\_relax{\_if$#2$\_else\_iindex{#2#1}\_fi}
+
+\_def\_iid #1 {\_leavevmode\_iindex{#1}#1\_futurelet\_tmp\_iiD\_def\_iitypesaved{}}
+\_def\_iiD{\_ifx\_tmp,\_else\_ifx\_tmp.\_else\_space\_fi\_fi}
+
+\_def\_iis #1 #2{{\_def~{ }\_global\_sdef{_,#1}{#2}}\_ignorespaces}
+
+\_def\_iitypesaved{}
+\_def\_iitype #1{\_def\_iitypesaved{#1}\_ignorespaces}
+
+\_public \ii \iid \iis \iitype ;
+
+\_endcode % -------------------------------------
+
+2021-02-15 \_expandafter -> \_ea
+2021-02-01 secodary sorting: start from code 65
+2020-04-21 \isempty \iffalse ... \fi added to \iindex
+2020-03-26 introduced
diff --git a/Master/texmf-dist/tex/optex/base/maketoc.opm b/Master/texmf-dist/tex/optex/base/maketoc.opm
new file mode 100644
index 00000000000..8dfd821640a
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/maketoc.opm
@@ -0,0 +1,154 @@
+% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \maketoc {Macros for maketoc <2020-02-09>} % preloaded in format
+
+   \_doc ------------------------------------
+   \`\_Xtoc` `{<level>}{<type>}{<number>}{<o-title>}<title>` (in `.ref` file) reads
+   given data and appends them to the \`\_toclist` as
+   \^`\_tocline``{<level>}{<type>}{<number>}{<o-title>}{<title>}{<gpageno>}{<pageno>}`
+   where:
+   \begitems
+   * `<level>`:   0 reserved, 1: chapter, 2: section, 3: subsection
+   * `<type>`:    the type of the level, i.e. chap, sec, secc
+   * `<number>`:  the number of the chapter/section/subsection in the format 1.2.3
+   * `<o-title>`: outlines title, if differs from `<title>`.
+   * `<title>`:   the title text
+   * `<gpageno>`: the page number numbered from 1 independently of pagination
+   * `<pageno>`:  the page number used in the pagination
+   \enditems
+   The last two parameters are restored from previous
+   \^`\_Xpage``{<pageno>}{<gpageno>}`, data were saved in the \^`\_currpage` macro.
+
+   We read the <title> parameter by \^`\scantoeol` from `.ref` file
+   because the <title> can include something like \code{`\{`}.
+   \_cod ------------------------------------
+
+\_def\_toclist{}
+\_newifi \_ifischap \_ischapfalse
+
+\_def\_Xtoc#1#2#3#4{\_ifnum#1=0 \_ischaptrue\_fi
+   \_addto\_toclist{\_tocline{#1}{#2}{#3}{#4}}\_scantoeol\_XtocA}
+\_def\_XtocA#1{\_addto\_toclist{{#1}}\_ea\_addto\_ea\_toclist\_ea{\_currpage}}
+
+   \_doc ------------------------------------
+   \`\_tocline``{<level>}{<type>}{<number>}{<o-title>}{<title>}{<gpageno>}{<pageno>}`
+   prints the record to the table of contents. It opens group, reduces `\_leftskip`,
+   `\_rightskip`, runs the \^`\everytocline` (user can customise the design of TOC
+   here) and runs `\_tocl:<level> {<number>}{<title>}{<pageno>}` macro.
+   This macro starts with vertical mode,
+   inserts one record with given `<level>` and it should end by \^`\_tocpar`
+   which returns to horizontal mode. The `\_tocpar`
+   appends `\_nobreak \_hskip-2\_iindent\_null \_par`. This causes
+   that the last line of the record is shifted outside the margin given by
+   `\_rightskip`. A typical record (with long `<title>`) looks like this:
+   \begtt \catcode`\<=13
+                  |                        |
+   \llap{<number>} text text text text text
+                   text text text text text
+                   text text .................... <pageno>
+   \endtt
+   Margins given by `\leftskip` and `\rightskip` are denoted by `|` in the
+   examle above.
+   \nl
+   \`\tocrefnum` is the global counter of all TOC records (used by hyperlinks).
+   \_cod ------------------------------------
+
+\_newcount \_tocrefnum
+\_def\_tocline#1#2#3#4#5#6#7{%
+   \_advance\_tocrefnum by1
+   \_bgroup
+      \_leftskip=\_iindent \_rightskip=2\_iindent
+      \_ifischap \_advance\_leftskip by \_iindent \_fi
+      \_def\_pgn{\_ilink[pg:#6]}%
+      \_the\_everytocline
+      \_ifcsname _tocl:#1\_endcsname
+         \_cs{_tocl:#1}{#3}{\_scantextokens{#5}}{#7}\_par
+      \_fi
+   \_egroup
+}
+\_public \tocrefnum ;
+
+   \_doc -----------------------------------
+   You can re-define default macros for each level of tocline if you want.\nl
+   Parameters are `{<number>}{<title>}{<pageno>}`.
+   \_cod -----------------------------------
+
+\_sdef{_tocl:1}#1#2#3{\_nofirst\_bigskip \_bf\_llaptoclink{#1}{#2}\_hfill \_pgn{#3}\_tocpar}
+\_sdef{_tocl:2}#1#2#3{\_llaptoclink{#1}{#2}\_tocdotfill \_pgn{#3}\_tocpar}
+\_sdef{_tocl:3}#1#2#3{\_advance\_leftskip by\_iindent \_cs{_tocl:2}{#1}{#2}{#3}}
+
+   \_doc -----------------------------------
+   The auxiliary macros are:
+   \begitems
+   * \`\_llaptoclink``<text>` does `\_noindent\_llap{<linked text>}`.
+   * \`\_tocdotfill` creates dots in the TOC.
+   * \`\_nofirst``\macro` applies the `\macro` only if we don't print the first
+     record of the TOC.
+   * \`\_tocpar` finalizes one TOC recors whith rlapped `<pageno>`.
+   * \`\_pgn``{<pageno>}` creates <pageno> as link to real `<gpage>` saved in `#6`
+     of \^`\_tocline`. This is temporarily defined in the \^`\_tocline`.
+   \enditems
+   \_cod ----------------------------------
+
+\_def\_llaptoclink#1{\_noindent
+   \_llap{\_ilink[toc:\_the\_tocrefnum]{\_enspace#1\_kern.4em}\_kern.1em}}
+\_def\_tocdotfill{\_nobreak\_leaders\_hbox to.8em{\_hss.\_hss}\_hskip 1em plus1fill\_relax}
+\_def\_nofirst #1{\_ifnum \_lastpenalty=11333 \_else #1\_fi}
+\_def\_tocpar{\_nobreak \_hskip-2\_iindent\_null \_par}
+
+   \_doc -----------------------------------
+   If you want a special formating of TOC with adding more
+   special lines (no generated as titles from `\chap`, `\sec`, `\secc`), you
+   can define `\addtotoc{<level>}{<type>}{<number>}{<o-title>}{<title>}` macro:
+   \begtt
+   \def\addtotoc#1#2#3#4#5{%
+      \incr\_tocrefnum
+      \_dest[toc:\_the\_tocrefnum]%
+      \_ewref\_Xtoc{{#1}{#2}{#3}{#4}#5}%
+   }
+   \endtt
+   and you can declare special lines (or something else)
+   as an unused level (10 in the following example):
+   \begtt
+      \sdef{_tocl:10}#1#2#3{\medskip\hbox{\Blue #2}\medskip}
+   \endtt
+   Now, users can add a blue line into TOC by
+   \begtt \catcode`\<=13
+      \addtotoc{10}{blue-line}{}{\relax}{<blue text to be added in the TOC>}
+   \endtt
+   anywhere in the document. Note that `\relax` in the fourth parameter
+   means that outline will be not generated. And second parameter
+   `blue-line` is only a comment (unused in macros).
+
+   \`\maketoc` prints warning if TOC data is empty, else it creates TOC by
+   running \^`\_toclist`
+   \_cod ----------------------------------
+
+\_def\_maketoc{\_par \_ifx\_toclist\_empty
+      \_opwarning{\_noexpand\maketoc -- data unavailable, TeX me again}\_openref
+      \_incr\_unresolvedrefs
+   \_else \_begingroup
+      \_tocrefnum=0 \_penalty11333
+      \_the\_regtoc \_toclist
+   \_endgroup \_fi
+}
+
+   \_doc -----------------------------------
+   \`\regmacro` appends its parameters to \`\_regtoc`, \`\_regmark` and
+   \`\_regoul`. These token lists are used in \^`\maketoc`, \^`\_begoutput` and
+   \^`\pdfunidef`.
+   \_cod \_fin -----------------------------
+
+\_newtoks \_regtoc  \_newtoks \_regmark  \_newtoks \_regoul
+
+\_def\_regmacro #1#2#3{%
+   \_toksapp\_regtoc{#1}\_toksapp\_regmark{#2}\_toksapp\_regoul{#3}%
+}
+\_public \maketoc \regmacro ;
+
+\_endcode
+
+2021-02-09 \thisoutline implemented
+2020-04-23 \_tocpar introduced (incompatible change)
+2020-04-22 \_pg -> \_pgn (incompatible change)
+2020-03-12 introduced
diff --git a/Master/texmf-dist/tex/optex/base/margins.opm b/Master/texmf-dist/tex/optex/base/margins.opm
new file mode 100644
index 00000000000..d88cc04237f
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/margins.opm
@@ -0,0 +1,80 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \margins {Macros for margins setting <2021-03-15>} % preloaded in format
+
+    \_doc ----------------------------
+    \`\margins``/<pg> <fmt> (<left>,<right>,<top>,<bot>)<unit>`
+    takes its parameters, does calculation and sets `\hoffset`, `\voffset`,
+    `\hsize` and `\vsize` registers. Note that \OpTeX/ sets the page origin at
+    the top left corner of the paper, no at the obscure position 1\,in, 1\,in.
+    It is much more comfortable for macro writers.
+    \_cod ----------------------------
+
+\_newdimen\_pgwidth  \_newdimen\_pgheight  \_pgwidth=0pt
+\_newdimen\_shiftoffset
+
+\_def\_margins/#1 #2 (#3,#4,#5,#6)#7 {\_def\_tmp{#7}%
+   \_ifx\_tmp\_empty
+      \_opwarning{\_string\_margins: missing unit, mm inserted}\_def\_tmp{mm}\_fi
+   \_setpagedimens #2 % setting \_pgwidth, \_pgheight
+   \_ifdim\_pgwidth=0pt \_else
+      \_hoffset=0pt \_voffset=0pt
+      \_if$#3$\_if$#4$\_hoffset =\_dimexpr (\_pgwidth -\_hsize)/2 \_relax
+              \_else  \_hoffset =\_dimexpr \_pgwidth -\_hsize - #4\_tmp \_relax % only right margin
+              \_fi
+      \_else  \_if$#4$\_hoffset = #3\_tmp \_relax  % only left margin
+              \_else  \_hsize =\_dimexpr \_pgwidth - #3\_tmp - #4\_tmp \_relax % left+right margin
+                      \_hoffset = #3\_tmp \_relax
+                      \_xhsize =\_hsize \_setxhsize % \_xhsize used by \output routine
+      \_fi\_fi
+      \_if$#5$\_if$#6$\_voffset =\_dimexpr (\_pgheight -\_vsize)/2 \_relax
+              \_else  \_voffset =\_dimexpr \_pgheight -\_vsize - #6\_tmp \_relax % only bottom margin
+              \_fi
+      \_else  \_if$#6$\_voffset = #5\_tmp \_relax  % only top margin
+              \_else  \_vsize=\_dimexpr \_pgheight - #5\_tmp - #6\_tmp \_relax % top+bottom margin
+                      \_voffset = #5\_tmp \_relax
+      \_fi\_fi
+      \_if 1#1\_shiftoffset=0pt \_def\_prepoffsets{}\_else \_if 2#1% double-page layout
+         \_shiftoffset = \_dimexpr \_pgwidth -\_hsize -2\_hoffset \_relax
+         \_def\_prepoffsets{\_ifodd\_pageno \_else \_advance\_hoffset \_shiftoffset \_fi}%
+      \_else \_opwarning{use \_string\_margins/1 or \_string\_margins/2}%
+   \_fi\_fi\_fi
+}
+\_def\_setpagedimens{\_isnextchar({\_setpagedimensB}{\_setpagedimensA}}
+\_def\_setpagedimensA#1 {\_ifcsname _pgs:#1\_endcsname
+   \_ea\_ea\_ea\_setpagedimensB \_csname _pgs:#1\_ea\_endcsname\_space
+   \_else \_opwarning{page specification "#1" is undefined}\_fi}
+\_def\_setpagedimensB (#1,#2)#3 {\_setpagedimensC\_pgwidth=#1:#3
+                                 \_setpagedimensC\_pgheight=#2:#3
+        \_pdfpagewidth=\_pgwidth \_pdfpageheight=\_pgheight
+}
+\_def\_setpagedimensC #1=#2:#3 {#1=#2\_ifx^#3^\_tmp\_else#3\_fi\_relax\_truedimen#1}
+
+\_public \margins ;
+
+    \_doc ----------------------------
+    The common page dimensions are defined here.
+    \_cod ----------------------------
+
+\_sdef{_pgs:a3}{(297,420)mm}  \_sdef{_pgs:a4}{(210,297)mm}  \_sdef{_pgs:a5}{(148,210)mm}
+\_sdef{_pgs:a3l}{(420,297)mm} \_sdef{_pgs:a4l}{(297,210)mm} \_sdef{_pgs:a5l}{(210,148)mm}
+\_sdef{_pgs:b5}{(176,250)mm}  \_sdef{_pgs:letter}{(8.5,11)in}
+
+    \_doc ----------------------------
+    \`\magscale` `[<factor>]` does `\mag=<factor>` and recalculates page
+    dimensions to their true values.
+    \_cod ----------------------------
+
+\_def\_trueunit{}
+\_def\_magscale[#1]{\_mag=#1\_def\_trueunit{true}%
+   \_ifdim\_pgwidth=0pt \_else \_truedimen\_pgwidth \_truedimen\_pgheight \_fi
+   \_truedimen\_pdfpagewidth \_truedimen\_pdfpageheight
+}
+\_def\_truedimen#1{\_ifx\_trueunit\_empty \_else#1=\_ea\_ignorept\_the#1truept \_fi}
+
+\_public \magscale ;
+
+\_endcode % -----------------------------------------
+
+2021-03-15 \_setxhsize added
+2020-03-14 released
diff --git a/Master/texmf-dist/tex/optex/base/math-macros.opm b/Master/texmf-dist/tex/optex/base/math-macros.opm
new file mode 100644
index 00000000000..2b090ee1b8b
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/math-macros.opm
@@ -0,0 +1,1079 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \sin {Math macros plus mathchardefs <2021-02-15>} % preloaded in format
+
+   \_doc -----------------------------
+   The category code of the character `_` remains as the letter (11) and the mathocode
+   of it is `"8000`.
+   It means that it is an active character in math mode. It is defined as the subscript prefix.
+
+   There is a problem: The `x_n` is tokenized as `x`, `_`, `n` and it works
+   without problems. But `\int``_a^b` is tokenized as `\int``_a`, `^`, `b`. The
+   control sequence `\int``_a` isn't defined. We must write `\int _a^b`.
+
+   The Lua code presented here solves this problem. But you cannot set your own
+   control sequence in the form `\<word>_` or `\<word>_<one-letter>` (where
+   <word> is a sequence of letters) because such control sequences are
+   inaccessible: preprocessor rewrites it.
+
+   The \`\mathsbon` macro activates the rewriting rule `\<word>_<nonleter>` to
+   `\<word> _<nonletter>` and
+   `\<word>``_<letter><nonletter>` to `\<word> _<letter><nonletter>` at input
+   processor level. The \`\mathsboff` deactivates it.
+   You can ask by \`\_ifmathsb` if this feature is activated or deactivated.
+   By default, it is activated in the `\everyjob`, see section~\ref[init].
+   Note, that the `\everyjob` is processed after the first line of the document is
+   read, so the \^`\mathsbon` is activated from the second line of the document.
+   \_cod -----------------------------
+
+\catcode`\_ = 8   \let\sb = _
+\catcode`\_ = 13  \let _ = \sb
+\catcode`\_ = 11
+\_private \sb ;
+
+\_newifi\_ifmathsb   \_mathsbfalse
+\_def \_mathsbon {%
+   \_directlua{
+   callback.add_to_callback("process_input_buffer",
+     function (str)
+       return string.gsub(str.." ", "(\_nbb[a-zA-Z]+)_([a-zA-Z]?[^_a-zA-Z])", "\_pcent 1 _\_pcent 2")
+     end, "_mathsb") }%
+   \_global\_mathsbtrue
+}
+\_def \_mathsboff {%
+   \_directlua{ callback.remove_from_callback("process_input_buffer", "_mathsb") }%
+   \_global \_mathsbfalse
+}
+\_public \mathsboff \mathsbon ;
+
+   \_doc -----------------------------
+   All mathcodes are set to equal values as in plain\TeX/.
+   But all encoding-dependent declarations (like these) will be set
+   to different values when a Unicode-math font is used.
+   \_cod -----------------------------
+
+\_mathcode`\^^@="2201 % \cdot
+\_mathcode`\^^A="3223 % \downarrow
+\_mathcode`\^^B="010B % \alpha
+\_mathcode`\^^C="010C % \beta
+\_mathcode`\^^D="225E % \land
+\_mathcode`\^^E="023A % \lnot
+\_mathcode`\^^F="3232 % \in
+\_mathcode`\^^G="0119 % \pi
+\_mathcode`\^^H="0115 % \lambda
+\_mathcode`\^^I="010D % \gamma
+\_mathcode`\^^J="010E % \delta
+\_mathcode`\^^K="3222 % \uparrow
+\_mathcode`\^^L="2206 % \pm
+\_mathcode`\^^M="2208 % \oplus
+\_mathcode`\^^N="0231 % \infty
+\_mathcode`\^^O="0140 % \partial
+\_mathcode`\^^P="321A % \subset
+\_mathcode`\^^Q="321B % \supset
+\_mathcode`\^^R="225C % \cap
+\_mathcode`\^^S="225B % \cup
+\_mathcode`\^^T="0238 % \forall
+\_mathcode`\^^U="0239 % \exists
+\_mathcode`\^^V="220A % \otimes
+\_mathcode`\^^W="3224 % \leftrightarrow
+\_mathcode`\^^X="3220 % \leftarrow
+\_mathcode`\^^Y="3221 % \rightarrow
+\_mathcode`\^^Z="8000 % \ne
+\_mathcode`\^^[="2205 % \diamond
+\_mathcode`\^^\="3214 % \le
+\_mathcode`\^^]="3215 % \ge
+\_mathcode`\^^^="3211 % \equiv
+\_mathcode`\^^_="225F % \lor
+\_mathcode`\ ="8000 % \space
+\_mathcode`\!="5021
+\_mathcode`\'="8000 % ^\prime
+\_mathcode`\(="4028
+\_mathcode`\)="5029
+\_mathcode`\*="2203 % \ast
+\_mathcode`\+="202B
+\_mathcode`\,="613B
+\_mathcode`\-="2200
+\_mathcode`\.="013A
+\_mathcode`\/="013D
+\_mathcode`\:="303A
+\_mathcode`\;="603B
+\_mathcode`\<="313C
+\_mathcode`\=="303D
+\_mathcode`\>="313E
+\_mathcode`\?="503F
+\_mathcode`\[="405B
+\_mathcode`\\="026E % \backslash
+\_mathcode`\]="505D
+\_mathcode`\_="8000 % math-active subscript
+\_mathcode`\{="4266
+\_mathcode`\|="026A
+\_mathcode`\}="5267
+\_mathcode`\^^?="1273 % \smallint
+
+\_delcode`\(="028300
+\_delcode`\)="029301
+\_delcode`\[="05B302
+\_delcode`\]="05D303
+\_delcode`\<="26830A
+\_delcode`\>="26930B
+\_delcode`\/="02F30E
+\_delcode`\|="26A30C
+\_delcode`\\="26E30F
+
+   \_doc -----------------------------
+   All control sequences declared by `\mathchardef` are supposed (by default)
+   only for public usage. It means that they are declared without `_` prefix.
+   If such sequences are used in internal \OpTeX/ macro then their internal
+   prefixed form is declared using `\_private` macro.\nl
+   These encoding dependent declarations will be set to different values
+   when Unicode-math font is loaded.\nl
+   The declared sequences for math symbols are not hyperlinked in this documentation.
+   \maxlines=15
+   \_cod -----------------------------
+
+\_mathchardef\alpha="010B
+\_mathchardef\beta="010C
+\_mathchardef\gamma="010D
+\_mathchardef\delta="010E
+\_mathchardef\epsilon="010F
+\_mathchardef\zeta="0110
+\_mathchardef\eta="0111
+\_mathchardef\theta="0112
+\_mathchardef\iota="0113
+\_mathchardef\kappa="0114
+\_mathchardef\lambda="0115
+\_mathchardef\mu="0116
+\_mathchardef\nu="0117
+\_mathchardef\xi="0118
+\_mathchardef\pi="0119
+\_mathchardef\rho="011A
+\_mathchardef\sigma="011B
+\_mathchardef\tau="011C
+\_mathchardef\upsilon="011D
+\_mathchardef\phi="011E
+\_mathchardef\chi="011F
+\_mathchardef\psi="0120
+\_mathchardef\omega="0121
+\_mathchardef\varepsilon="0122
+\_mathchardef\vartheta="0123
+\_mathchardef\varpi="0124
+\_mathchardef\varrho="0125
+\_mathchardef\varsigma="0126
+\_mathchardef\varphi="0127
+\_mathchardef\Gamma="7000
+\_mathchardef\Delta="7001
+\_mathchardef\Theta="7002
+\_mathchardef\Lambda="7003
+\_mathchardef\Xi="7004
+\_mathchardef\Pi="7005
+\_mathchardef\Sigma="7006
+\_mathchardef\Upsilon="7007
+\_mathchardef\Phi="7008
+\_mathchardef\Psi="7009
+\_mathchardef\Omega="700A
+
+\_mathchardef\aleph="0240
+\_mathchardef\imath="017B
+\_mathchardef\jmath="017C
+\_mathchardef\ell="0160
+\_mathchardef\wp="017D
+\_mathchardef\Re="023C
+\_mathchardef\Im="023D
+\_mathchardef\partial="0140
+\_mathchardef\infty="0231
+\_mathchardef\prime="0230
+\_mathchardef\emptyset="023B
+\_mathchardef\nabla="0272
+\_protected\_def \surd{{\_mathchar"1270}}
+\_mathchardef\top="023E
+\_mathchardef\bot="023F
+\_mathchardef\triangle="0234
+\_mathchardef\forall="0238
+\_mathchardef\exists="0239
+\_mathchardef\neg="023A  \_let\lnot=\neg
+\_mathchardef\flat="015B
+\_mathchardef\natural="015C
+\_mathchardef\sharp="015D
+\_mathchardef\clubsuit="027C
+\_mathchardef\diamondsuit="027D
+\_mathchardef\heartsuit="027E
+\_mathchardef\spadesuit="027F
+
+\_mathchardef\coprod="1360
+\_mathchardef\bigvee="1357
+\_mathchardef\bigwedge="1356
+\_mathchardef\biguplus="1355
+\_mathchardef\bigcap="1354
+\_mathchardef\bigcup="1353
+\_mathchardef\intop="1352
+\_protected\_def \int{\_intop\_nolimits}  \_private \intop;
+\_mathchardef\prod="1351
+\_mathchardef\sum="1350
+\_mathchardef\bigotimes="134E
+\_mathchardef\bigoplus="134C
+\_mathchardef\bigodot="134A
+\_mathchardef\ointop="1348
+\_protected\_def\_oint {\_ointop\_nolimits}  \_private \ointop;
+\_mathchardef\bigsqcup="1346
+\_mathchardef\smallint="1273
+
+\_mathchardef\triangleleft="212F   \_private \triangleleft;
+\_mathchardef\triangleright="212E  \_private \trianglerigt;
+\_mathchardef\bigtriangleup="2234
+\_mathchardef\bigtriangledown="2235
+\_mathchardef\wedge="225E \let\land=\wedge
+\_mathchardef\vee="225F \let\lor=\vee
+\_mathchardef\cap="225C
+\_mathchardef\cup="225B
+\_mathchardef\ddagger="227A
+\_mathchardef\dagger="2279
+\_mathchardef\sqcap="2275
+\_mathchardef\sqcup="2274
+\_mathchardef\uplus="225D
+\_mathchardef\amalg="2271
+\_mathchardef\diamond="2205
+\_mathchardef\bullet="220F   \_private \bullet;
+\_mathchardef\wr="226F
+\_mathchardef\div="2204
+\_mathchardef\odot="220C
+\_mathchardef\oslash="220B
+\_mathchardef\otimes="220A
+\_mathchardef\ominus="2209
+\_mathchardef\oplus="2208
+\_mathchardef\mp="2207
+\_mathchardef\pm="2206
+\_mathchardef\circ="220E
+\_mathchardef\bigcirc="220D
+\_mathchardef\setminus="226E % for set difference A\setminus B
+\_mathchardef\cdot="2201
+\_mathchardef\ast="2203
+\_mathchardef\times="2202
+\_mathchardef\star="213F
+
+\_mathchardef\propto="322F
+\_mathchardef\sqsubseteq="3276
+\_mathchardef\sqsupseteq="3277
+\_mathchardef\parallel="326B
+\_mathchardef\mid="326A
+\_mathchardef\dashv="3261
+\_mathchardef\vdash="3260
+\_mathchardef\nearrow="3225
+\_mathchardef\searrow="3226
+\_mathchardef\nwarrow="322D
+\_mathchardef\swarrow="322E
+\_mathchardef\Leftrightarrow="322C
+\_mathchardef\Leftarrow="3228
+\_mathchardef\Rightarrow="3229
+\_protected\_def \neq{\_not=} \_let\ne=\neq
+\_mathchardef\leq="3214 \let\le=\leq
+\_mathchardef\geq="3215 \let\ge=\geq
+\_mathchardef\succ="321F
+\_mathchardef\prec="321E
+\_mathchardef\approx="3219
+\_mathchardef\succeq="3217
+\_mathchardef\preceq="3216
+\_mathchardef\supset="321B
+\_mathchardef\subset="321A
+\_mathchardef\supseteq="3213
+\_mathchardef\subseteq="3212
+\_mathchardef\in="3232
+\_mathchardef\ni="3233 \let\owns=\ni
+\_mathchardef\gg="321D
+\_mathchardef\ll="321C
+% \_mathchardef\not="3236  % defined below
+\_mathchardef\leftrightarrow="3224
+\_mathchardef\leftarrow="3220  \_let\gets=\leftarrow
+\_mathchardef\rightarrow="3221 \_let\to=\rightarrow
+\_mathchardef\mapstochar="3237
+\_protected\_def\mapsto{\_mapstochar\_rightarrow}  \_private \mapstochar \rightarrow ;
+\_mathchardef\sim="3218
+\_mathchardef\simeq="3227
+\_mathchardef\perp="323F
+\_mathchardef\equiv="3211
+\_mathchardef\asymp="3210
+\_mathchardef\smile="315E
+\_mathchardef\frown="315F
+\_mathchardef\leftharpoonup="3128
+\_mathchardef\leftharpoondown="3129
+\_mathchardef\rightharpoonup="312A
+\_mathchardef\rightharpoondown="312B
+
+   \_doc -----------------------------
+   The math functions like log, sin, cos are declared in the same way as in
+   plain\TeX/, but they are `\protected` in \OpTeX/.
+   \_cod -----------------------------
+
+\_protected\_def\log {\_mathop{\_rm log}\_nolimits}
+\_protected\_def\lg {\_mathop{\_rm lg}\_nolimits}
+\_protected\_def\ln {\_mathop{\_rm ln}\_nolimits}
+\_protected\_def\lim {\_mathop{\_rm lim}}
+\_protected\_def\limsup {\_mathop{\_rm lim\_thinsk sup}}
+\_protected\_def\liminf {\_mathop{\_rm lim\_thinsk inf}}
+\_protected\_def\sin {\_mathop{\_rm sin}\_nolimits}
+\_protected\_def\arcsin {\_mathop{\_rm arcsin}\_nolimits}
+\_protected\_def\sinh {\_mathop{\_rm sinh}\_nolimits}
+\_protected\_def\cos {\_mathop{\_rm cos}\_nolimits}
+\_protected\_def\arccos {\_mathop{\_rm arccos}\_nolimits}
+\_protected\_def\cosh {\_mathop{\_rm cosh}\_nolimits}
+\_protected\_def\tan {\_mathop{\_rm tan}\_nolimits}
+\_protected\_def\arctan {\_mathop{\_rm arctan}\_nolimits}
+\_protected\_def\tanh {\_mathop{\_rm tanh}\_nolimits}
+\_protected\_def\cot {\_mathop{\_rm cot}\_nolimits}
+\_protected\_def\coth {\_mathop{\_rm coth}\_nolimits}
+%\_protected\_def\sec {\_mathop{\_rm sec}\_nolimits} % \sec is section
+\_protected\_def\csc {\_mathop{\_rm csc}\_nolimits}
+\_protected\_def\max {\_mathop{\_rm max}}
+\_protected\_def\min {\_mathop{\_rm min}}
+\_protected\_def\sup {\_mathop{\_rm sup}}
+\_protected\_def\inf {\_mathop{\_rm inf}}
+\_protected\_def\arg {\_mathop{\_rm arg}\_nolimits}
+\_protected\_def\ker {\_mathop{\_rm ker}\_nolimits}
+\_protected\_def\dim {\_mathop{\_rm dim}\_nolimits}
+\_protected\_def\hom {\_mathop{\_rm hom}\_nolimits}
+\_protected\_def\det {\_mathop{\_rm det}}
+\_protected\_def\exp {\_mathop{\_rm exp}\_nolimits}
+\_protected\_def\Pr {\_mathop{\_rm Pr}}
+\_protected\_def\gcd {\_mathop{\_rm gcd}}
+\_protected\_def\deg {\_mathop{\_rm deg}\_nolimits}
+
+   \_doc -----------------------------
+   These macros are defined similarly as in plain\TeX. Only internal macro
+   names from plain\TeX/ with `@` character are re-written in a more readable
+   form.\nl
+   \`\sp` is an alternative for `^`. The \`\sb` alternative for `_` was defined
+   at line 27 of the file `math-macros.opm`.
+   \_cod -----------------------------
+
+\_let\_sp=^ \public \sp ;
+% \sb=_ , defined at beginning of this file
+
+\_def\_thinsk {\_mskip\_thinmuskip}
+\_protected\_def\,{\_relax\_ifmmode \_thinsk \_else \_thinspace \_fi}
+\_protected\_def\>{\_mskip\_medmuskip}    \let\_medsk   = \>
+\_protected\_def\;{\_mskip\_thickmuskip}  \let\_thicksk = \;
+\_protected\_def\!{\_mskip-\_thinmuskip}  \let\_thinneg = \!
+%\_def\*{\discretionary{\thinspace\the\textfont2\char2}{}{}} % obsolete
+
+   \_doc -----------------------------
+   Active \`\prime` character is defined here.
+   \_cod -----------------------------
+
+{\_catcode`\'=\active \_gdef'{^\_bgroup\_primes}} % primes dance
+\_def\_primes{\_prime\_isnextchar'{\_primesA}%
+                                  {\_isnextchar^{\_primesB}{\_egroup}}}
+\_def\_primesA #1{\_primes}
+\_def\_primesB #1#2{#2\egroup}
+\_private \prime ;
+
+   \_doc -----------------------------
+   \`\big`, \`\Big`, \`\bigg`, \`\Bigg`, \`\bigl`, \`\bigm`, \`\bigr`, \`\Bigl`, \`\Bigm`,
+   \`\Bigr`, \`\biggl`, \`\biggm`, \`\biggr`, \`\Biggl`, \`\Biggm`, \`\Bigg`, \`\Biggr`
+   are based on the \`\_scalebig` macro because we need the dependency on
+   the various sizes of the fonts.
+   \_cod -----------------------------
+
+%{\catcode`\^^Z=\active \gdef^^Z{\not=}} % ^^Z is like \ne in math %obsolete
+
+\_def\_scalebig#1#2{{\_left#1\_vbox to#2\_fontdimen6\_textfont1{}%
+                     \_kern-\_nulldelimiterspace\_right.}}
+\_protected\_def\_big#1{\_scalebig{#1}{.85}}
+\_protected\_def\_Big#1{\_scalebig{#1}{1.15}}
+\_protected\_def\_bigg#1{\_scalebig{#1}{1.45}}
+\_protected\_def\_Bigg#1{\_scalebig{#1}{1.75}}
+\_public \big \Big \bigg \Bigg ;
+
+\_protected\_def\_bigl{\_mathopen\_big}
+\_protected\_def\_bigm{\_mathrel\_big}
+\_protected\_def\_bigr{\_mathclose\_big}
+\_protected\_def\_Bigl{\_mathopen\_Big}
+\_protected\_def\_Bigm{\_mathrel\_Big}
+\_protected\_def\_Bigr{\_mathclose\_Big}
+\_protected\_def\_biggl{\_mathopen\_bigg}
+\_protected\_def\_biggm{\_mathrel\_bigg}
+\_protected\_def\_biggr{\_mathclose\_bigg}
+\_protected\_def\_Biggl{\_mathopen\_Bigg}
+\_protected\_def\_Biggm{\_mathrel\_Bigg}
+\_protected\_def\_Biggr{\_mathclose\_Bigg}
+\_public \bigl \bigm \bigr \Bigl \Bigm \Bigr \biggl \biggm \biggr \Biggl \Biggm \Biggr ;
+
+   \_doc -----------------------------
+   Math relations defined by the \`\jointrel` plain \TeX/ macro:
+   \_cod -----------------------------
+
+\_protected\_def\_joinrel{\_mathrel{\_mkern-2.5mu}}  % -3mu in plainTeX
+\_protected\_def\relbar{\_mathrel{\_smash-}} % \_smash, because - has the same height as +
+\_protected\_def\Relbar{\_mathrel=}
+\_mathchardef\lhook="312C
+\_protected\_def\hookrightarrow{\_lhook\_joinrel\_rightarrow}
+\_mathchardef\rhook="312D
+\_protected\_def\hookleftarrow{\_leftarrow\_joinrel\_rhook}
+\_protected\_def\bowtie{\_mathrel\_triangleright\_joinrel\_mathrel\_triangleleft}
+\_protected\_def\models{\_mathrel|\_joinrel=}
+\_protected\_def\Longrightarrow{\_Relbar\_joinrel\_Rightarrow}
+\_protected\_def\longrightarrow{\_relbar\_joinrel\_rightarrow}
+\_protected\_def\longleftarrow{\_leftarrow\_joinrel\_relbar}
+\_protected\_def\Longleftarrow{\_Leftarrow\_joinrel\_Relbar}
+\_protected\_def\longmapsto{\_mapstochar\_longrightarrow}
+\_protected\_def\longleftrightarrow{\_leftarrow\_joinrel\_rightarrow}
+\_protected\_def\Longleftrightarrow{\_Leftarrow\_joinrel\_Rightarrow}
+\_protected\_def\iff{\_thicksk\_Longleftrightarrow\_thicksk}
+\_private \lhook \rightarrow \leftarrow \rhook \triangleright \triangleleft
+   \Relbar \Rightarrow \relbar \rightarrow \Leftarrow \mapstochar
+   \longrightarrow \Longleftrightarrow ;
+\_public \joinrel ;
+
+   \_doc -----------------------------
+   \`\ldots`, \`\cdots`,  \`\vdots`, \`\ddots` from plain \TeX/
+   \_cod -----------------------------
+
+\_mathchardef\_ldotp="613A % ldot as a punctuation mark
+\_mathchardef\_cdotp="6201 % cdot as a punctuation mark
+\_mathchardef\_colon="603A % colon as a punctuation mark
+\_public \ldotp \cdotp \colon ;
+
+\_protected\_def\_ldots{\_mathinner{\_ldotp\_ldotp\_ldotp}}
+\_protected\_def\_cdots{\_mathinner{\_cdotp\_cdotp\_cdotp}}
+\_protected\_def\_vdots{\_vbox{\_baselineskip=.4em \_lineskiplimit=\_zo
+    \_kern.6em \_hbox{.}\_hbox{.}\_hbox{.}}}
+\_protected\_def\_ddots{\_mathinner{%
+    \_mkern1mu\_raise.7em\_vbox{\_kern.7em\_hbox{.}}\_mkern2mu
+    \_raise.4em\_hbox{.}\_mkern2mu\_raise.1em\_hbox{.}\_mkern1mu}}
+
+\_public \ldots \cdots \vdots \ddots ;
+
+   \_doc -----------------------------
+   \`\adots` inspired by plain \TeX/
+   \_cod -----------------------------
+
+\_protected\_def\_adots{\_mathinner{%
+    \_mkern1mu\_raise.1em\_hbox{.}\_mkern2mu
+    \_raise.4em\_hbox{.}\_mkern2mu\_raise.7em\_vbox{\_kern.7em\_hbox{.}}\_mkern1mu}}
+
+\_public \adots ;
+
+   \_doc -----------------------------
+   Math accents (encoding dependent declarations).
+   \_cod -----------------------------
+
+\_protected\_def\acute{\_mathaccent"7013 }
+\_protected\_def\grave{\_mathaccent"7012 }
+\_protected\_def\ddot{\_mathaccent"707F }
+\_protected\_def\tilde{\_mathaccent"707E }
+\_protected\_def\bar{\_mathaccent"7016 }
+\_protected\_def\breve{\_mathaccent"7015 }
+\_protected\_def\check{\_mathaccent"7014 }
+\_protected\_def\hat{\_mathaccent"705E }
+\_protected\_def\vec{\_mathaccent"017E }
+\_protected\_def\dot{\_mathaccent"705F }
+\_protected\_def\widetilde{\_mathaccent"0365 }
+\_protected\_def\widehat{\_mathaccent"0362 }
+
+   \_doc -----------------------------
+   \`\_math`, \`\skew`,
+   \`\overrightarrow`, \`\overleftarrow`, \`\overbrace`, \`\underbrace` macros.
+   The last four are redefined when Unicode math is loaded.
+   \_cod -----------------------------
+
+\_def\_math{\_mathsurround\_zo}
+\_protected\_def\_skew #1#2#3{{\_muskip0=#1mu\_divide\_muskip0=by2 \_mkern\_muskip0
+    #2{\_mkern-\_muskip0{#3}\_mkern\_muskip0}\_mkern-\_muskip0}{}}
+\_protected\_def\_overrightarrow #1{\_vbox{\_math\_ialign{##\_crcr
+      \_rightarrowfill\_crcr\_noalign{\_kern-.1em \_nointerlineskip}
+      $\_hfil\_displaystyle{#1}\_hfil$\_crcr}}}
+\_protected\_def\_overleftarrow #1{\_vbox{\_math\_ialign{##\_crcr
+      \_leftarrowfill\_crcr\_noalign{\_kern-.1em \_nointerlineskip}
+      $\_hfil\_displaystyle{#1}\_hfil$\_crcr}}}
+\_protected\_def\_overbrace #1{\_mathop{%
+      \_vbox{\_math\_ialign{##\_crcr\_noalign{\_kern.3em}
+      \_downbracefill\_crcr\_noalign{\_kern.3em \_nointerlineskip}
+      $\_hfil\_displaystyle{#1}\_hfil$\_crcr}}}\_limits}
+\_protected\_def\_underbrace #1{\_mathop{\_vtop{\_math\_ialign{##\_crcr
+      $\_hfil\_displaystyle{#1}\_hfil$\_crcr\_noalign{\_kern.3em \_nointerlineskip}
+      \_upbracefill\_crcr\_noalign{\_kern.3em}}}}\_limits}
+
+\_public \overrightarrow \overleftarrow \overbrace \underbrace \skew ;
+
+   \_doc -----------------------------
+   Macros based on `\delimiter`, `\*witdelims`  and `\radical` primitives.
+   \_cod -----------------------------
+
+\_protected\_def\lmoustache{\_delimiter"437A340 } % top from (, bottom from )
+\_protected\_def\rmoustache{\_delimiter"537B341 } % top from ), bottom from (
+\_protected\_def\lgroup{\_delimiter"462833A } % extensible ( with sharper tips
+\_protected\_def\rgroup{\_delimiter"562933B } % extensible ) with sharper tips
+\_protected\_def\arrowvert{\_delimiter"26A33C } % arrow without arrowheads
+\_protected\_def\Arrowvert{\_delimiter"26B33D } % double arrow without arrowheads
+\_protected\_def\bracevert{\_delimiter"77C33E } % the vertical bar that extends braces
+\_protected\_def\Vert{\_delimiter"26B30D } \_let\|=\Vert
+\_protected\_def\vert{\_delimiter"26A30C }
+\_protected\_def\uparrow{\_delimiter"3222378 }
+\_protected\_def\downarrow{\_delimiter"3223379 }
+\_protected\_def\updownarrow{\_delimiter"326C33F }
+\_protected\_def\Uparrow{\_delimiter"322A37E }
+\_protected\_def\Downarrow{\_delimiter"322B37F }
+\_protected\_def\Updownarrow{\_delimiter"326D377 }
+\_protected\_def\backslash{\_delimiter"26E30F } % for double coset G\_backslash H
+\_protected\_def\rangle{\_delimiter"526930B }
+\_protected\_def\langle{\_delimiter"426830A }
+\_protected\_def\rbrace{\_delimiter"5267309 } \_let\}=\rbrace \_let\_rbrace=\rbrace
+\_protected\_def\lbrace{\_delimiter"4266308 } \_let\{=\lbrace \_let\_lbrace=\lbrace
+\_protected\_def\rceil{\_delimiter"5265307 }
+\_protected\_def\lceil{\_delimiter"4264306 }
+\_protected\_def\rfloor{\_delimiter"5263305 }
+\_protected\_def\lfloor{\_delimiter"4262304 }
+
+\_protected\_def\choose{\_atopwithdelims()}
+\_protected\_def\brack{\_atopwithdelims[]}
+\_protected\_def\brace{\_atopwithdelims\_lbrace\_rbrace}
+
+\_protected\_def\_sqrt{\_radical"270370 }  \_public \sqrt ;
+
+   \_doc -----------------------------
+   \`\mathpalette`, \`\vphantom`, \`\hphantom`, \`\phantom`, \`\mathstrut`, and
+   \`\smash` macros from plain \TeX.
+   \_cod -----------------------------
+
+\_def\_mathpalette#1#2{\_mathchoice{#1\_displaystyle{#2}}%
+  {#1\_textstyle{#2}}{#1\_scriptstyle{#2}}{#1\_scriptscriptstyle{#2}}}
+\_newbox\_rootbox
+\_protected\_def\root#1\of{\_setbox\_rootbox
+  \_hbox{$\_math\_scriptscriptstyle{#1}$}\_mathpalette\_rootA}
+\_def\_rootA#1#2{\_setbox0=\_hbox{$\_math#1\_sqrt{#2}$}\_dimen0=\_ht0
+  \_advance\_dimen0by-\_dp0
+  \_mkern5mu\_raise.6\_dimen0\_copy\_rootbox \_mkern-10mu\_box0 }
+\_newifi\_ifvp \_newifi\_ifhp
+\_protected\_def\_vphantom{\_vptrue\_hpfalse\_phant}
+\_protected\_def\_hphantom{\_vpfalse\_hptrue\_phant}
+\_protected\_def\_phantom{\_vptrue\_hptrue\_phant}
+\_def\_phant{\_ifmmode\_def\_next{\_mathpalette\_mathphant}%
+  \_else\_let\_next=\_makephant\_fi\_next}
+\_def\_makephant#1{\_setbox0\_hbox{#1}\_finphant}
+\_def\_mathphant#1#2{\_setbox0=\_hbox{$\_math#1{#2}$}\_finphant}
+\_def\_finphant{\_setbox2=\_null
+  \_ifvp \_ht2=\_ht0 \_dp2=\_dp0 \_fi
+  \_ifhp \_wd2=\_wd0 \_fi \_hbox{\_box2}}
+\_def\_mathstrut{\_vphantom(}
+\_protected\_def\_smash{\_relax % \_relax, in case this comes first in \halign
+  \_ifmmode\_def\_next{\_mathpalette\_mathsmash}\_else\_let\_next\_makesmash
+  \_fi\_next}
+\_def\_makesmash#1{\_setbox0=\_hbox{#1}\_finsmash}
+\_def\_mathsmash#1#2{\_setbox0=\_hbox{$\_math#1{#2}$}\_finsmash}
+\_def\_finsmash{\_ht0=\_zo \_dp0=\_zo \_hbox{\_box0}}
+\_public \mathpalette \vphantom \hphantom \phantom \mathstrut \smash ;
+
+   \_doc -----------------------------
+   \`\cong`, \`\notin`, \`\rightleftharpoons`, \`\buildrel`, \`\doteq`, \`\bmod`
+   and \`\pmod` macros from plain \TeX/.
+   \_cod -----------------------------
+
+\_protected\_def\_cong{\_mathrel{\_mathpalette\_overeq\_sim}} % congruence sign
+\_def\_overeq#1#2{\_lower.05em\_vbox{\_lineskiplimit\_maxdimen\_lineskip=-.05em
+    \_ialign{$\_math#1\_hfil##\_hfil$\_crcr#2\_crcr=\_crcr}}}
+\_protected\_def\_notin{\_mathrel{\_mathpalette\_cancel\_in}}
+\_def\_cancel#1#2{\_math\_ooalign{$\_hfil#1\_mkern1mu/\_hfil$\_crcr$#1#2$}}
+\_protected\_def\_rightleftharpoons{\_mathrel{\_mathpalette\_rlhp{}}}
+\_def\_rlhp#1{\_vcenter{\_math\_hbox{\_ooalign{\_raise.2em
+          \_hbox{$#1\_rightharpoonup$}\_crcr
+        $#1\_leftharpoondown$}}}}
+\_protected\_def\_buildrel#1\over#2{\_mathrel{\_mathop{\_kern\_zo #2}\_limits^{#1}}}
+\_protected\_def\_doteq{\_buildrel\_textstyle.\over=}
+\_private \in \sim ;
+\_public \cong \notin \rightleftharpoons \buildrel \doteq ;
+
+\_protected\_def\_bmod{\_nonscript\_mskip-\_medmuskip\_mkern5mu
+  \_mathbin{\_rm mod}\_penalty900\_mkern5mu\_nonscript\_mskip-\_medmuskip}
+\_protected\_def\_pmod#1{\_allowbreak\_mkern18mu({\_rm mod}\_thinsk\_thinsk#1)}
+\_public \bmod \pmod ;
+
+   \_doc -----------------------------
+   \`\matrix` and \`\pmatrix`
+   behave as in Plain \TeX/, if it is used in the
+   `\displaystyle`. On the other hand, it is printed in smaller size
+   (by appropriate amount) in `\textstyle` = `\scriptstyle` and `\scriptscriptstyle`.
+   This feature is new in \OpTeX/.
+   \_cod -----------------------------
+
+\_protected\_def\_matrix#1{\_null\_thinsk
+    \_edef\_tmpa{\_the\_numexpr \_mathstyle/4\_relax}% 0 0 1 1 1 1 2 2
+    \_vcenter{\_matrixbaselines\_math
+    \_ialign{\_the\_lmfil$\_matrixstyle##$\_hfil&&\_quad\_the\_lmfil$\_matrixstyle##$\_hfil\_crcr
+      \_mathstrut\_crcr\_noalign{\_kern-\_baselineskip}
+      #1\_crcr\_mathstrut\_crcr\_noalign{\_kern-\_baselineskip}}}\_thinsk}
+
+\_def\_matrixbaselines{\_normalbaselines \_def\_matrixstyle{}%
+   \_let\_matrixbaselines=\_relax % \matrix inside matrix does not change size again
+   \_ifcase\_tmpa \_or
+       \_baselineskip=.7\_baselineskip \_def\_quad {\_hskip.7em\_relax}%
+       \_let\_matrixstyle=\_scriptstyle
+   \_or
+       \_baselineskip=.5\_baselineskip \_def\_quad {\_hskip.5em\_relax}%
+       \_let\_matrixstyle=\_scriptscriptstyle
+   \_fi
+}
+\_protected\_def\_pmatrix#1{\_left(\_matrix{#1}\_right)}
+
+\_public \matrix \pmatrix ;
+
+   \_doc -----------------------------
+   The \`\cases` and \`\bordermatrix` macros are almost identical as in plain \TeX/.
+   You can simply re-define `\bordermatrix` with other delimiters
+   using the common \`\_bordermatrixwithdelims` macro.
+   \_cod -----------------------------
+
+\_protected\_long\_def\_cases#1{\_left\{\_thinsk\_vcenter{\_normalbaselines\_math
+    \_ialign{$##\_hfil$&\_quad{##\_unsskip}\_hfil\_crcr#1\_crcr}}\_right.}
+
+\_newdimen\_ptrenwd
+\_ptrenwd=8.75pt % width of the big left (
+\_protected\_def\_bordermatrix{\_bordermatrixwithdelims()}
+\_def\_bordermatrixwithdelims#1#2#3{\_begingroup \_math
+  \_setbox0=\_vbox{\_bordermatrixA #3\_stopbmatrix}%
+  \_setbox2=\_vbox{\_unvcopy0 \_global\_setbox1=\_lastbox}%
+  \_setbox2=\_hbox{\_unhbox1 \_unskip\_global\_setbox1=\_lastbox}%
+  \_setbox2=\_hbox{$\_kern\_wd1 \_kern-\_ptrenwd\_left#1\_kern-\_wd1
+    \_global\_setbox1=\_vbox{\_box1 \_kern.2em}%
+    \_vcenter{\_kern-\_ht1 \_unvbox0 \_kern-\_baselineskip}\_thinsk\_right#2$}%
+  \_null\_thicksk\_vbox{\_kern\_ht1 \_box2}\_endgroup}
+\_def\_bordermatrixA #1\cr#2\_stopbmatrix{%
+    \_ialign{$##$\_hfil\_kern.2em\_kern\_ptrenwd&\_thinspace\_hfil$##$\_hfil
+      &&\_quad\_hfil$##$\_hfil\_crcr
+      \_omit\_strut\_hfil\_crcr\_noalign{\_kern-\_baselineskip}%
+      #1\_crcr\_noalign{\_kern.2em}#2\_crcr\_omit\_strut\_cr}}
+
+\_public \cases \bordermatrix ;
+
+   \_doc -----------------------------
+   The \`\eqalign` macro behaves like in Plain \TeX/ by default.
+   It creates the `\vcenter` in the math mode. The content is two column
+   `\halign` with right-aligned left column and left-aligned right column.
+   The table items are in `\displaystyle` and the `\baselineskip` is
+   advanced by `\jot` (3pt in plain \TeX). It follows from the default
+   settings of \^`\eqlines` and \^`\eqstyle` parameters.
+
+   In \OpTeX/, this macro is more flexible. See section 4.4 in the
+   \ulink[http://petr.olsak.net/ftp/olsak/optex/optex-math.pdf]
+         {Typesetting Math with \OpTeX/}.
+   The `\baselineskip` value is set by the \^`\eqlines` parameter and math style
+   by the \^`\eqstyle` parameter.
+
+   There are more possible columns than two (used in classical Plain TeX):
+   `rlcrlcrlc` etc.\ where `r` and `l` columns are without spaces and `c` column
+   (if used) has space \^`\eqspace`/2 at its both sides.
+   \_cod -----------------------------
+
+\_long\_def\_eqalign#1{\_null\_thinsk\_vcenter{\_the\_eqlines\_math
+   \_ialign{&\_hfil$\_the\_eqstyle{##}$&$\_the\_eqstyle{{}##}$\_hfil
+            &\_hskip.5\_eqspace\_hfil$\_the\_eqstyle{##}$\_hskip.5\_eqspace\_hfil
+            \_crcr#1\_crcr}}\_thinsk}
+
+\_public \eqalign ;
+
+   \_doc -----------------------------
+   The \`\displaylines``{<formula>\cr<formula>\cr...<formula>}`
+   creates horizontally centered formulae.
+   It behaves exactly as in Plain \TeX/. The `\halign` is applied directly
+   in the outer display environment with lines of type `\hbox to\displaywidth`.
+   This enables to break lines inside such display to more pages but it is
+   impossible to use `\eqno` or `\leqno` or \^`\eqmark`.
+
+   \OpTeX/ offers
+   `\dislaylines to<dimen>{<formula>\cr<formula>\cr...<formula>}`
+   as an alternative case of usage `\displaylines`. See section 4.3 in the
+   \ulink[http://petr.olsak.net/ftp/olsak/optex/optex-math.pdf]
+         {Typesetting Math with \OpTeX/}.
+   The centered formulas are in `\vcenter` in this case,
+   so lines cannot be broken into more pages, but this case
+   enables to use `\eqno` or `\leqno` or \^`\eqmark`.
+   \_cod -----------------------------
+
+\_def\_displaylines #1#{\_ifx&#1&\_ea\_displaylinesD
+   \_else \_def\_tmp to##1\_end{\_def\_tmp{\_dimexpr ##1}}\_tmp #1\_end
+        \_ea\_displaylinesto \_fi}
+\_long\_def\_displaylinesD #1{\_display \_tabskip=\_zoskip
+   \_halign{\_hbox to\_displaywidth{$\_elign\_hfil\_displaystyle##\_hfil$}\_crcr
+      #1\_crcr}}
+\_long\_def\_displaylinesto #1{\_vcenter{\_openup\_jot \_math \_tabskip=\_zoskip
+   \_halign{\_strut\_hbox to\_span\_tmp{$\_hss\_displaystyle##\_hss$}\_crcr
+      #1\_crcr}}}
+
+\_public\displaylines ;
+
+   \_doc -----------------------------
+   \`\openup`, \`\eqalignno` and `\leqalignno` macros are copied from
+   Plain \TeX/ unchanged.
+   \_cod -----------------------------
+
+\_def\_openup{\_afterassignment\_openupA\_dimen0=}
+\_def\_openupA{\_advance\_lineskip by\_dimen0
+  \_advance\_baselineskip by\_dimen0
+  \_advance\_lineskiplimit by\_dimen0 }
+\_newifi\_ifdtop
+\_def\_display{\_global\_dtoptrue\_openup\_jot\_math
+  \_everycr{\_noalign{\_ifdtop \_global\_dtopfalse \_ifdim\_prevdepth>-1000pt
+      \_vskip-\_lineskiplimit \_vskip\_normallineskiplimit \_fi
+      \_else \_penalty\_interdisplaylinepenalty \_fi}}}
+\_def\_elign{\_tabskip=\_zoskip\_everycr{}} % restore inside \_display
+\_long\_def\_eqalignno#1{\_display \_tabskip=\_centering
+  \_halign to\_displaywidth{\_hfil$\_elign\_displaystyle{##}$\_tabskip=\_zoskip
+    &$\_elign\_displaystyle{{}##}$\_hfil\_tabskip\_centering
+    &\_llap{$\_elign##$}\_tabskip\_zoskip\_crcr
+    #1\_crcr}}
+\_long\_def\_leqalignno#1{\_display \_tabskip=\_centering
+  \_halign to\_displaywidth{\_hfil$\_elign\_displaystyle{##}$\_tabskip=\_zoskip
+    &$\_elign\_displaystyle{{}##}$\_hfil\_tabskip=\_centering
+    &\_kern-\_displaywidth\_rlap{$\_elign##$}\_tabskip\_displaywidth\_crcr
+    #1\_crcr}}
+\_public \openup \eqalignno \leqalignno ;
+
+   \_doc -----------------------------
+   These macros are inspired by `ams-math.tex` file.
+   \maxlines=15
+   \_cod -----------------------------
+
+\_def\_amsafam{4} \_def\_amsbfam{5}
+
+\_mathchardef \boxdot   "2\_amsafam 00
+\_mathchardef \boxplus   "2\_amsafam 01
+\_mathchardef \boxtimes   "2\_amsafam 02
+\_mathchardef \square   "0\_amsafam 03
+\_mathchardef \blacksquare   "0\_amsafam 04
+\_mathchardef \centerdot   "2\_amsafam 05
+\_mathchardef \lozenge   "0\_amsafam 06
+\_mathchardef \blacklozenge   "0\_amsafam 07
+\_mathchardef \circlearrowright   "3\_amsafam 08
+\_mathchardef \circlearrowleft   "3\_amsafam 09
+\_mathchardef \rightleftharpoons   "3\_amsafam 0A
+\_mathchardef \leftrightharpoons   "3\_amsafam 0B
+\_mathchardef \boxminus   "2\_amsafam 0C
+\_mathchardef \Vdash   "3\_amsafam 0D
+\_mathchardef \Vvdash   "3\_amsafam 0E
+\_mathchardef \vDash   "3\_amsafam 0F
+\_mathchardef \twoheadrightarrow   "3\_amsafam 10
+\_mathchardef \twoheadleftarrow   "3\_amsafam 11
+\_mathchardef \leftleftarrows   "3\_amsafam 12
+\_mathchardef \rightrightarrows   "3\_amsafam 13
+\_mathchardef \upuparrows   "3\_amsafam 14
+\_mathchardef \downdownarrows   "3\_amsafam 15
+\_mathchardef \upharpoonright   "3\_amsafam 16
+\_mathchardef \downharpoonright   "3\_amsafam 17
+\_mathchardef \upharpoonleft   "3\_amsafam 18
+\_mathchardef \downharpoonleft   "3\_amsafam 19
+\_mathchardef \rightarrowtail   "3\_amsafam 1A
+\_mathchardef \leftarrowtail   "3\_amsafam 1B
+\_mathchardef \leftrightarrows   "3\_amsafam 1C
+\_mathchardef \rightleftarrows   "3\_amsafam 1D
+\_mathchardef \Lsh   "3\_amsafam 1E
+\_mathchardef \Rsh   "3\_amsafam 1F
+\_mathchardef \rightsquigarrow   "3\_amsafam 20
+\_mathchardef \leftrightsquigarrow   "3\_amsafam 21
+\_mathchardef \looparrowleft   "3\_amsafam 22
+\_mathchardef \looparrowright   "3\_amsafam 23
+\_mathchardef \circeq   "3\_amsafam 24
+\_mathchardef \succsim   "3\_amsafam 25
+\_mathchardef \gtrsim   "3\_amsafam 26
+\_mathchardef \gtrapprox   "3\_amsafam 27
+\_mathchardef \multimap   "3\_amsafam 28
+\_mathchardef \therefore   "3\_amsafam 29
+\_mathchardef \because   "3\_amsafam 2A
+\_mathchardef \doteqdot   "3\_amsafam 2B
+\_mathchardef \triangleq   "3\_amsafam 2C
+\_mathchardef \precsim   "3\_amsafam 2D
+\_mathchardef \lesssim   "3\_amsafam 2E
+\_mathchardef \lessapprox   "3\_amsafam 2F
+\_mathchardef \eqslantless   "3\_amsafam 30
+\_mathchardef \eqslantgtr   "3\_amsafam 31
+\_mathchardef \curlyeqprec   "3\_amsafam 32
+\_mathchardef \curlyeqsucc   "3\_amsafam 33
+\_mathchardef \preccurlyeq   "3\_amsafam 34
+\_mathchardef \leqq   "3\_amsafam 35
+\_mathchardef \leqslant   "3\_amsafam 36
+\_mathchardef \lessgtr   "3\_amsafam 37
+\_mathchardef \backprime   "0\_amsafam 38
+\_mathchardef \risingdotseq   "3\_amsafam 3A
+\_mathchardef \fallingdotseq   "3\_amsafam 3B
+\_mathchardef \succcurlyeq   "3\_amsafam 3C
+\_mathchardef \geqq   "3\_amsafam 3D
+\_mathchardef \geqslant   "3\_amsafam 3E
+\_mathchardef \gtrless   "3\_amsafam 3F
+\_mathchardef \sqsubset   "3\_amsafam 40
+\_mathchardef \sqsupset   "3\_amsafam 41
+\_mathchardef \vartriangleright   "3\_amsafam 42
+\_mathchardef \vartriangleleft   "3\_amsafam 43
+\_mathchardef \trianglerighteq   "3\_amsafam 44
+\_mathchardef \trianglelefteq   "3\_amsafam 45
+\_mathchardef \bigstar   "0\_amsafam 46
+\_mathchardef \between   "3\_amsafam 47
+\_mathchardef \blacktriangledown   "0\_amsafam 48
+\_mathchardef \blacktriangleright   "3\_amsafam 49
+\_mathchardef \blacktriangleleft   "3\_amsafam 4A
+\_mathchardef \vartriangle   "3\_amsafam 4D
+\_mathchardef \blacktriangle   "0\_amsafam 4E
+\_mathchardef \triangledown   "0\_amsafam 4F
+\_mathchardef \eqcirc   "3\_amsafam 50
+\_mathchardef \lesseqgtr   "3\_amsafam 51
+\_mathchardef \gtreqless   "3\_amsafam 52
+\_mathchardef \lesseqqgtr   "3\_amsafam 53
+\_mathchardef \gtreqqless   "3\_amsafam 54
+\_mathchardef \Rrightarrow   "3\_amsafam 56
+\_mathchardef \Lleftarrow   "3\_amsafam 57
+\_mathchardef \veebar   "2\_amsafam 59
+\_mathchardef \barwedge   "2\_amsafam 5A
+\_mathchardef \doublebarwedge   "2\_amsafam 5B
+\_mathchardef \angle   "0\_amsafam 5C
+\_mathchardef \measuredangle   "0\_amsafam 5D
+\_mathchardef \sphericalangle   "0\_amsafam 5E
+\_mathchardef \varpropto   "3\_amsafam 5F
+\_mathchardef \smallsmile   "3\_amsafam 60
+\_mathchardef \smallfrown   "3\_amsafam 61
+\_mathchardef \Subset   "3\_amsafam 62
+\_mathchardef \Supset   "3\_amsafam 63
+\_mathchardef \Cup   "2\_amsafam 64
+\_mathchardef \Cap   "2\_amsafam 65
+\_mathchardef \curlywedge   "2\_amsafam 66
+\_mathchardef \curlyvee   "2\_amsafam 67
+\_mathchardef \leftthreetimes   "2\_amsafam 68
+\_mathchardef \rightthreetimes   "2\_amsafam 69
+\_mathchardef \subseteqq   "3\_amsafam 6A
+\_mathchardef \supseteqq   "3\_amsafam 6B
+\_mathchardef \bumpeq   "3\_amsafam 6C
+\_mathchardef \Bumpeq   "3\_amsafam 6D
+\_mathchardef \lll   "3\_amsafam 6E
+\_mathchardef \ggg   "3\_amsafam 6F
+\_protected\_def \ulcorner {\_delimiter"4\_amsafam 70\_amsafam 70 }
+\_protected\_def \urcorner {\_delimiter"5\_amsafam 71\_amsafam 71 }
+\_mathchardef \circledS   "0\_amsafam 73
+\_mathchardef \pitchfork   "3\_amsafam 74
+\_mathchardef \dotplus   "2\_amsafam 75
+\_mathchardef \backsim   "3\_amsafam 76
+\_mathchardef \backsimeq   "3\_amsafam 77
+\_protected\_def \llcorner {\_delimiter"4\_amsafam 78\_amsafam 78 }
+\_protected\_def \lrcorner {\_delimiter"5\_amsafam 79\_amsafam 79 }
+\_mathchardef \complement   "0\_amsafam 7B
+\_mathchardef \intercal   "2\_amsafam 7C
+\_mathchardef \circledcirc   "2\_amsafam 7D
+\_mathchardef \circledast   "2\_amsafam 7E
+\_mathchardef \circleddash   "2\_amsafam 7F
+\_mathchardef \rhd   "2\_amsafam 42
+\_mathchardef \lhd   "2\_amsafam 43
+\_mathchardef \unrhd   "2\_amsafam 44
+\_mathchardef \unlhd   "2\_amsafam 45
+
+   \_let\restriction\upharpoonright
+   \_let\Doteq\doteqdot
+   \_let\doublecup\Cup
+   \_let\doublecap\Cap
+   \_let\llless\lll
+   \_let\gggtr\ggg
+   \_let\Box=\square % LaTeX symbol
+   \_let\Box=\square % LaTeX symbol
+
+\_mathchardef \lvertneqq   "3\_amsbfam 00
+\_mathchardef \gvertneqq   "3\_amsbfam 01
+\_mathchardef \nleq   "3\_amsbfam 02
+\_mathchardef \ngeq   "3\_amsbfam 03
+\_mathchardef \nless   "3\_amsbfam 04
+\_mathchardef \ngtr   "3\_amsbfam 05
+\_mathchardef \nprec   "3\_amsbfam 06
+\_mathchardef \nsucc   "3\_amsbfam 07
+\_mathchardef \lneqq   "3\_amsbfam 08
+\_mathchardef \gneqq   "3\_amsbfam 09
+\_mathchardef \nleqslant   "3\_amsbfam 0A
+\_mathchardef \ngeqslant   "3\_amsbfam 0B
+\_mathchardef \lneq   "3\_amsbfam 0C
+\_mathchardef \gneq   "3\_amsbfam 0D
+\_mathchardef \npreceq   "3\_amsbfam 0E
+\_mathchardef \nsucceq   "3\_amsbfam 0F
+\_mathchardef \precnsim   "3\_amsbfam 10
+\_mathchardef \succnsim   "3\_amsbfam 11
+\_mathchardef \lnsim   "3\_amsbfam 12
+\_mathchardef \gnsim   "3\_amsbfam 13
+\_mathchardef \nleqq   "3\_amsbfam 14
+\_mathchardef \ngeqq   "3\_amsbfam 15
+\_mathchardef \precneqq   "3\_amsbfam 16
+\_mathchardef \succneqq   "3\_amsbfam 17
+\_mathchardef \precnapprox   "3\_amsbfam 18
+\_mathchardef \succnapprox   "3\_amsbfam 19
+\_mathchardef \lnapprox   "3\_amsbfam 1A
+\_mathchardef \gnapprox   "3\_amsbfam 1B
+\_mathchardef \nsim   "3\_amsbfam 1C
+\_mathchardef \ncong   "3\_amsbfam 1D
+\_mathchardef \diagup   "0\_amsbfam 1E
+\_mathchardef \diagdown   "0\_amsbfam 1F
+\_mathchardef \varsubsetneq   "3\_amsbfam 20
+\_mathchardef \varsupsetneq   "3\_amsbfam 21
+\_mathchardef \nsubseteqq   "3\_amsbfam 22
+\_mathchardef \nsupseteqq   "3\_amsbfam 23
+\_mathchardef \subsetneqq   "3\_amsbfam 24
+\_mathchardef \supsetneqq   "3\_amsbfam 25
+\_mathchardef \varsubsetneqq   "3\_amsbfam 26
+\_mathchardef \varsupsetneqq   "3\_amsbfam 27
+\_mathchardef \subsetneq   "3\_amsbfam 28
+\_mathchardef \supsetneq   "3\_amsbfam 29
+\_mathchardef \nsubseteq   "3\_amsbfam 2A
+\_mathchardef \nsupseteq   "3\_amsbfam 2B
+\_mathchardef \nparallel   "3\_amsbfam 2C
+\_mathchardef \nmid   "3\_amsbfam 2D
+\_mathchardef \nshortmid   "3\_amsbfam 2E
+\_mathchardef \nshortparallel   "3\_amsbfam 2F
+\_mathchardef \nvdash   "3\_amsbfam 30
+\_mathchardef \nVdash   "3\_amsbfam 31
+\_mathchardef \nvDash   "3\_amsbfam 32
+\_mathchardef \nVDash   "3\_amsbfam 33
+\_mathchardef \ntrianglerighteq   "3\_amsbfam 34
+\_mathchardef \ntrianglelefteq   "3\_amsbfam 35
+\_mathchardef \ntriangleleft   "3\_amsbfam 36
+\_mathchardef \ntriangleright   "3\_amsbfam 37
+\_mathchardef \nleftarrow   "3\_amsbfam 38
+\_mathchardef \nrightarrow   "3\_amsbfam 39
+\_mathchardef \nLeftarrow   "3\_amsbfam 3A
+\_mathchardef \nRightarrow   "3\_amsbfam 3B
+\_mathchardef \nLeftrightarrow   "3\_amsbfam 3C
+\_mathchardef \nleftrightarrow   "3\_amsbfam 3D
+\_mathchardef \divideontimes   "2\_amsbfam 3E
+\_mathchardef \varnothing   "0\_amsbfam 3F
+\_mathchardef \nexists   "0\_amsbfam 40
+\_mathchardef \Finv   "0\_amsbfam 60
+\_mathchardef \Game   "0\_amsbfam 61
+\_mathchardef \mho   "0\_amsbfam 66
+\_mathchardef \eth   "0\_amsbfam 67
+\_mathchardef \eqsim   "3\_amsbfam 68
+\_mathchardef \beth   "0\_amsbfam 69
+\_mathchardef \gimel   "0\_amsbfam 6A
+\_mathchardef \daleth   "0\_amsbfam 6B
+\_mathchardef \lessdot   "2\_amsbfam 6C
+\_mathchardef \gtrdot   "2\_amsbfam 6D
+\_mathchardef \ltimes   "2\_amsbfam 6E
+\_mathchardef \rtimes   "2\_amsbfam 6F
+\_mathchardef \shortmid   "3\_amsbfam 70
+\_mathchardef \shortparallel   "3\_amsbfam 71
+\_mathchardef \smallsetminus   "2\_amsbfam 72
+\_mathchardef \thicksim   "3\_amsbfam 73
+\_mathchardef \thickapprox   "3\_amsbfam 74
+\_mathchardef \approxeq   "3\_amsbfam 75
+\_mathchardef \precapprox   "3\_amsbfam 76
+\_mathchardef \succapprox   "3\_amsbfam 77
+\_mathchardef \curvearrowleft   "3\_amsbfam 78
+\_mathchardef \curvearrowright   "3\_amsbfam 79
+\_mathchardef \digamma   "0\_amsbfam 7A
+\_mathchardef \varkappa   "0\_amsbfam 7B
+\_mathchardef \Bbbk   "0\_amsbfam 7C
+\_mathchardef \hslash   "0\_amsbfam 7D
+\_mathchardef \hbar   "0\_amsbfam 7E
+\_mathchardef \backepsilon   "3\_amsbfam 7F
+
+\_let\circledplus\oplus
+\_let\circledminus\ominus
+\_let\circledtimes\otimes
+\_let\circledslash\oslash
+\_let\circleddot\odot
+
+   \_doc -----------------------------
+   The \^`\not` macro is re-defined to be smarter than in plain
+   \TeX/. The macro follows this rule:
+   \begtt
+   \not< becomes \_nless
+   \not> becomes \_ngtr
+   if \_notXXX is defined, \not\XXX becomes \_notXXX;
+   if \_nXXX is defined, \not\XXX becomes \_nXXX;
+   otherwise, \not\XXX is done in the usual way.
+   \endtt
+   \_cod -----------------------------
+
+\_mathchardef \_notchar  "3236
+
+\_protected\_def \_not#1{%
+  \_ifx #1<\_nless \_else
+  \_ifx #1>\_ngtr \_else
+  \_edef\_tmpn{\_csstring#1}%
+  \_ifcsname _not\_tmpn\_endcsname \_csname _not\_tmpn\_endcsname
+  \_else \_ifcsname _n\_tmpn\_endcsname \_csname _n\_tmpn\_endcsname
+  \_else \_mathrel{\_mathord{\_notchar}\_mathord{#1}}%
+  \_fi \_fi \_fi \_fi}
+\_private
+  \nleq \ngeq \nless \ngtr \nprec \nsucc \nleqslant \ngeqslant \npreceq
+  \nsucceq \nleqq \ngeqq \nsim \ncong \nsubseteqq \nsupseteqq \nsubseteq
+  \nsupseteq \nparallel \nmid \nshortmid \nshortparallel \nvdash \nVdash
+  \nvDash \nVDash \ntrianglerighteq \ntrianglelefteq \ntriangleleft
+  \ntriangleright \nleftarrow \nrightarrow \nLeftarrow \nRightarrow
+  \nLeftrightarrow \nleftrightarrow \nexists ;
+\_public \not ;
+
+   \_doc -----------------------------
+   \`\mathstyles``{<math list>}`
+   behaves like `{<math list>}`, but you can use the following commands in the
+   `<math list>`:
+   \begitems
+   * \`\currstyle` which expands to `\displaystyle`, `\textstyle`,
+     `\scriptstyle` or `\scriptscriptstyle` depending on the current math style
+     when \^`\mathstyles` was opened.
+   * \`\dobystyle``{<D>}{<T>}{<S>}{<SS>}` is expandable macro. It expands to
+     `<D>`, `<T>`, `<S>` or `<SS>` depending on the current math style
+     when \^`\mathstyles` was opened.
+   * The value of the \`\stylenum` is 0, 1, 2 or 3
+     depending on the current math style when \^`\mathstyles` was opened.
+   \enditems
+   Example of usage of \^`\mathstyles`:
+   `\def\mathframe#1{\mathstyles{\frame{$\currstyle{#1}$}}}`.
+   \_cod -----------------------------
+
+\_newcount\_stylenum
+\_def\_mathstyles#1{{\_mathchoice{\_stylenum0 #1}{\_stylenum1 #1}%
+                                {\_stylenum2 #1}{\_stylenum3 #1}}}
+\_def\_dobystyle#1#2#3#4{\_ifcase\_stylenum#1\_or#2\_or#3\_or#4\_fi}
+\_def\_currstyle{\_dobystyle\_displaystyle\_textstyle\_scriptstyle\_scriptscriptstyle}
+\_public \mathstyles \dobystyle \currstyle \stylenum ;
+
+   \_doc -----------------------------
+   The \`\cramped` macro
+   sets the cramped variant of the current style.
+   Note that \^`\currstyle` initializes non-cramped variants.
+   The example `\mathframe` above should be:\nl
+   `\def\mathframe#1{\mathstyles{\frame{$\currstyle\cramped #1$}}}`.\nl
+   Second note: `\cramped` macro reads the current math style from
+   the `\mathstyle` LuaTeX primitive, so it does not work in numerators of
+   generalized fractions but you can use it before the fraction is opened:
+   `$\cramped {x^2\over y^2}$`.
+   \_cod -----------------------------
+
+\_def\_cramped{\_ifcase\_numexpr(\_mathstyle+1)/2\_relax\_or
+   \_crampeddisplaystyle \_or \_crampedtextstyle \_or
+   \_crampedscriptstyle \_or \_crampedscriptscriptstyle \_fi
+}
+\_public \cramped ;
+
+   \_doc -----------------------------
+   The \`\mathbox``{<text>}` macro is copied from OPmac trick 078.
+   It behaves like `\hbox{<text>}` but the `<text>` is scaled to a smaller
+   size if it is used in scriptstyle or scriptscript style.\nl
+   The \^`\_textmff` and \^`\_scriptmff` are redefined in order to
+   respect optical sizes. If we are in script style then the math mode
+   starts in text style, but optical size is given to script style.
+   The `\mathbox` in non-Unicode math respects optical sizes
+   using different principle.
+   \_cod -----------------------------
+
+\_def\_mathbox#1{{\_mathstyles{\_hbox{%
+   \_ifnum\_stylenum<2 \_everymath{\_currstyle}%
+   \_else
+      \_ifnum\_stylenum=2 \_def\_textmff{+ssty=0;}\_fi
+      \_ifnum\_stylenum=3 \_def\_textmff{+ssty=1;}\_def\_scriptmff{+ssty=1;}\_fi
+      \_typoscale[\_dobystyle{}{}{700}{500}/]\_fi #1}}}%
+}
+\_public \mathbox ;
+
+\_endcode %---------------------------------------------------
+
+2021-02-15 \_mathbox redefines \_textmff etc. in order to respect optical sizes
+2021-02-04 \_bordermatrixwithdelims introduced.
+2021-01-23 better expession for math styles in \matrix
+2021-01-22 bad use of \_stylenum in \matrix + bad value (bug fix: \_stylenum->\_mtstylenum)
+2020-12-17 \box0->\hbox{\box0} in \_finphant and \_finsmash, see https://tex.stackexchange.com/questions/574997/
+2020-06-14 \borermatrix, \cases corrected
+2020-06-13 \adots introduced, \matrix smaller in T mode too.
+2020-06-03 \notin corrected
+2020-06-02 $$\par$$ error is supressed, so we define \(l)eqalign(no), \displayines as \long
+2020-05-30 \cases: group added in the second column.
+           "\displaylines to<size>" implemented and documented.
+2020-05-11 \let\|=\Vert, bug fixed
+2020-04-27 \mathstyles introduced
+2020-03-14 implemented
diff --git a/Master/texmf-dist/tex/optex/base/math-preload.opm b/Master/texmf-dist/tex/optex/base/math-preload.opm
new file mode 100644
index 00000000000..0ec9abae2f7
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/math-preload.opm
@@ -0,0 +1,227 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \normalmath {Math fonts CM + AMS preloaded <2020-05-06>} % preloaded in format
+
+  \_doc ------------------------------
+  We have two math macros \`\normalmath` for the normal shape of all math
+  symbols and \`\boldmath` for the bold shape of all math symbols. The second one
+  can be used in bold titles, for example.
+  These macros load all fonts from all given math font families.
+  \_cod ------------------------------
+
+\_def\_normalmath{%
+  \_loadmathfamily 0 cmr  % CM Roman
+  \_loadmathfamily 1 cmmi % CM Math Italic
+  \_loadmathfamily 2 cmsy % CM Standard symbols
+  \_loadmathfamily 3 cmex % CM extra symbols
+  \_loadmathfamily 4 msam % AMS symbols A
+  \_loadmathfamily 5 msbm % AMS symbols B
+  \_loadmathfamily 6 rsfs % script
+  \_loadmathfamily 7 eufm % fractur
+  \_loadmathfamily 8 bfsans % sans serif bold
+  \_loadmathfamily 9 bisans % sans serif bold slanted (for vectors)
+%  \_setmathfamily 10 \_tentt
+%  \_setmathfamily 11 \_tenit
+  \_setmathdimens
+}
+\_def\_boldmath{%
+  \_loadmathfamily 0 cmbx  % CM Roman Bold Extended
+  \_loadmathfamily 1 cmmib % CM Math Italic Bold
+  \_loadmathfamily 2 cmbsy % CM Standard symbols Bold
+  \_loadmathfamily 3 cmexb % CM extra symbols Bold
+  \_loadmathfamily 4 msam  % AMS symbols A (bold not available?)
+  \_loadmathfamily 5 msbm  % AMS symbols B (bold not available?)
+  \_loadmathfamily 6 rsfs  % script (bold not available?)
+  \_loadmathfamily 7 eufb  % fractur bold
+  \_loadmathfamily 8 bbfsans % sans serif extra bold
+  \_loadmathfamily 9 bbisans % sans serif extra bold slanted (for vectors)
+%  \_setmathfamily 10 \_tentt
+%  \_setmathfamily 11 \_tenbi
+  \_setmathdimens
+}
+\_count18=9   % families declared by \newfam are 12, 13, ...
+
+\_def \normalmath {\_normalmath}  \_def\boldmath {\_boldmath}
+
+   \_doc -----------------------------
+   The classical math family selectors
+   \`\mit`, \^`\cal`, \^`\bbchar`, \^`\frak` and \^`\script`
+   are defined here.
+   The \^`\rm`, \^`\bf`, \^`\it`, \^`\bi` and \^`\tt` does two things:
+   they are variant selectors for text fonts and math family selectors for math fonts.
+   The idea was adapted from plain \TeX/.\nl
+   These macros are redefined when `unimat-codes.opm` is loaded,
+   see the section~\ref[unimath-codes].
+   \_cod -----------------------------
+
+\_chardef\_bffam = 8
+\_chardef\_bifam = 9
+%\_chardef\_ttfam = 10
+%\_chardef\_itfam = 11
+
+\_protected\_def \_rm {\_tryloadrm \_tenrm \_fam0 }
+\_protected\_def \_bf {\_tryloadbf \_tenbf \_fam\_bffam}
+\_protected\_def \_it {\_tryloadit \_tenit \_fam1 }
+\_protected\_def \_bi {\_tryloadbi \_tenbi \_fam\_bifam}
+\_protected\_def \_tt {\_tryloadtt \_tentt}
+
+\_protected\_def \_mit    {\_fam1 }
+\_protected\_def \_cal    {\_fam2 }
+\_protected\_def \_bbchar {\_fam5 }  % double stroked letters
+\_protected\_def \_frak   {\_fam7 }  % fraktur
+\_protected\_def \_script {\_fam6 }  % more extensive script than \cal
+
+\_public \rm \bf \it \bi \tt \mit \cal \bbchar \frak \script ;
+
+   \_doc -----------------------------
+   The optical sizes of Computer Modern fonts, AMS, and other fonts
+   are declared here.
+   \_cod -----------------------------
+
+%% CM math fonts, optical sizes:
+
+\_regtfm cmmi 0 cmmi5 5.5 cmmi6 6.5 cmmi7 7.5 cmmi8 8.5 cmmi9 9.5
+                cmmi10 11.1 cmmi12 *
+\_regtfm cmmib 0 cmmib5 5.5 cmmib6 6.5 cmmib7 7.5 cmmib8 8.5 cmmib9 9.5 cmmib10 *
+\_regtfm cmtex 0 cstex8 8.5 cstex9 9.5 cstex10 *
+\_regtfm cmsy 0 cmsy5 5.5 cmsy6 6.5 cmsy7 7.5 cmsy8 8.5 cmsy9 9.5 cmsy10 *
+\_regtfm cmbsy 0 cmbsy5 5.5 cmbsy6 6.5 cmbsy7 7.5 cmbsy8 8.5 cmbsy9 9.5 cmbsy10 *
+\_regtfm cmex 0 cmex7 7.5 cmex8 8.5 cmex9 9.5 cmex10 *
+\_regtfm cmexb 0 cmexb10 *
+
+\_regtfm cmr  0 cmr5 5.5 cmr6 6.5 cmr7 7.5 cmr8 8.5 cmr9 9.5
+                cmr10 11.1 cmr12 15 cmr17 *
+\_regtfm cmbx 0 cmbx5 5.5 cmbx6 6.5 cmbx7 7.5 cmbx8 8.5 cmbx9 9.5
+                cmbx10 11.1 cmbx12 *
+\_regtfm cmti 0 cmti7 7.5 cmti8 8.5 cmti9 9.5 cmti10 11.1 cmti12 *
+\_regtfm cmtt 0 cmtt8 8.5 cmtt9 9.5 cmtt10 11.1 cmtt12 *
+
+%% AMS math fonts, optical sizes:
+
+\_regtfm msam 0 msam5 5.5 msam6 6.5 msam7 7.5 msam8 8.5 msam9 9.5 msam10 *
+\_regtfm msbm 0 msbm5 5.5 msbm6 6.5 msbm7 7.5 msbm8 8.5 msbm9 9.5 msbm10 *
+
+%% fraktur, rsfs, optical sizes:
+
+\_regtfm eufm 0 eufm5 6 eufm7 8.5 eufm10 *
+\_regtfm eufb 0 eufb5 6 eufb7 8.5 eufb10 *
+\_regtfm rsfs 0 rsfs5 6 rsfs7 8.5 rsfs10 *
+
+%% bf and bi sansserif math alternatives:
+
+\_regtfm bfsans 0 ecsx0500 5.5 ecsx0600 6.5 ecsx0700 7.5 ecsx0800
+             8.5 ecsx0900 9.5 ecsx1000 11.1 ecsx1200 *
+\_regtfm bisans 0 ecso0500 5.5 ecso0600 6.5 ecso0700 7.5 ecso0800
+             8.5 ecso0900 9.5 ecso1000 11.1 ecso1200 *
+\_regtfm bbfsans 0 ecsx0500 5.5 ecsx0600 6.5 ecsx0700 7.5 ecsx0800
+             8.5 ecsx0900 9.5 ecsx1000 11.1 ecsx1200 *
+\_regtfm bbisans 0 ecso0500 5.5 ecso0600 6.5 ecso0700 7.5 ecso0800
+             8.5 ecso0900 9.5 ecso1000 11.1 ecso1200 *
+
+   \_doc -----------------------------
+   \`\_loadmathfamily` `<number> <font>` loads one math family, i.\,e.\
+   the triple of fonts in the text size, script size and script-script size.
+   The `<font>` is `<font-id>` used in the `\_regtfm` parameter or
+   the real TFM name. The family is saved as `\fam<number>`.
+   \nl
+   \`\_setmathfamily` `<number> \<font-switch>` loads one math family
+   like `\_loadmathfamily` does it. But the second parameter is a
+   `\<font-switch>` declared previously by the `\font` primitive.
+   \nl
+   The font family is loaded at \`\_sizemtext`, \`\_sizemscript` and
+   \`\_sizemsscript` sizes. These sizes are set by the
+   \`\setmathsizes` `[<text-size>/<script-size>/<scriptscript-size>]` macro.
+   These parameters are given in the \`\ptmunit` unit, it is set to
+   1\`\ptunit` and it is set to 1\,pt by  default.
+   \nl
+   \`\_corrmsize` `<factor><space>` can be used just before
+   `\_loadmathfamily` or `\_setmathfamily`.
+   The `<factor>` is decimal number, it denotes
+   scale-factor \"size of loaded math font in `\textstyle` : size of text font".
+   You can use it in `\_normalmath` or `\_boldmath` macros if you want to do a
+   corrections (for example due to different ex-height in text and math
+   font). The `\_corrmsize` is applied only to one following
+   `\_loadmathfamily` or `\_setmathfamily`. If it is missing
+   then the `<factor>` is 1 for such math family (i.e.\ no size corrections).
+   \_cod -----------------------------
+
+\_def\_corrmsize#1 {\_ptmunit=#1\_ptunit} % for corrections of sizes in diferent fonts
+
+\_def\_loadmathfamily #1 #2 {%
+  \_edef\_optsizesave{\_the\_optsize}%
+  \_optsize=\_sizemtext    \_font\_mF=\_whichtfm{#2} at\_optsize \_textfont#1=\_mF
+  \_optsize=\_sizemscript  \_font\_mF=\_whichtfm{#2} at\_optsize \_scriptfont#1=\_mF
+  \_optsize=\_sizemsscript \_font\_mF=\_whichtfm{#2} at\_optsize \_scriptscriptfont#1=\_mF
+  \_optsize=\_optsizesave \_ptmunit=\_ptunit
+}
+\_def\_setmathfamily #1 #2{\_let\_mF=#2%
+  \_edef\_optsizesave{\_the\_optsize}%
+  \_optsize=\_sizemtext    \_fontlet#2=#2 at\_optsize \_textfont#1=#2%
+  \_optsize=\_sizemscript  \_fontlet#2=#2 at\_optsize \_scriptfont#1=#2%
+  \_optsize=\_sizemsscript \_fontlet#2=#2 at\_optsize \_scriptscriptfont#1=#2%
+  \_optsize=\_optsizesave \_ptmunit=\_ptunit \_let#2=\_mF
+}
+\_def\_setmathsizes[#1/#2/#3]{\_ptmunit=\_ptunit
+   \_def\_sizemtext{#1\_ptmunit}\_def\_sizemscript{#2\_ptmunit}%
+   \_def\_sizemsscript{#3\_ptmunit}%
+}
+\_newdimen\_ptunit   \_ptunit=1pt
+\_newdimen\_ptmunit  \_ptmunit=1\_ptunit
+
+\_public \setmathsizes \ptunit \ptmunit ;
+
+   \_doc -----------------------------
+   The \`\_setmathdimens` macro is used in \^`\normalmath` or \^`\boldmath`
+   macros. It makes math dimensions dependent on the font size (plain \TeX/ sets
+   them only for 10\,pt typesetting). The `\skewchar` of some math families are
+   set here too.
+   \_cod -----------------------------
+
+\_def\_setmathdimens{% PlainTeX sets these dimens for 10pt size only:
+  \_delimitershortfall=0.5\_fontdimen6\_textfont3
+  \_nulldelimiterspace=0.12\_fontdimen6\_textfont3
+  \_scriptspace=0.05\_fontdimen6\_textfont3
+  \_skewchar\_textfont1=127 \_skewchar\_scriptfont1=127
+  \_skewchar\_scriptscriptfont1=127
+  \_skewchar\_textfont2=48  \_skewchar\_scriptfont2=48
+  \_skewchar\_scriptscriptfont2=48
+  \_skewchar\_textfont6=127 \_skewchar\_scriptfont6=127
+  \_skewchar\_scriptscriptfont6=127
+}
+
+   \_doc -----------------------------
+   Finally, we preload a math fonts collection in [10/7/5] sizes
+   when the format is generated. This is done when
+   `\_suppressfontnotfounderror=1` because we need not errors when the format is
+   generated. Maybe there are not all fonts in the \TeX/ distribution
+   installed.
+   \_cod -----------------------------
+
+\_suppressfontnotfounderror=1
+\_setmathsizes[10/7/5]\_normalmath
+\_suppressfontnotfounderror=0
+
+
+\_endcode %---------------------------------------------------
+
+The Computer Modern and AMS fonts are preloaded here in classical math-fam
+concept, where each math family includes three fonts with max 256 characters
+(typically 128 characters).
+
+On the other hand, when \^`\fontfam` macro is used in the document then text
+font family and appropriate math family is loaded with Unicode fonts, i.e.
+Unicode-math is used. It re-defines all settings given here.
+
+The general rule of usage the math fonts in different sizes in \OpTeX/ says: set three
+sizes by the macro
+\^`\setmathsizes` `[<text-size>/<script-size>/<scriptscript-size>]` and then
+load all math fonts in given sizes by \^`\normalmath` or \^`\boldmath` macros.
+For example
+\begtt
+\setmathsizes[12/8.4/6]\normalmath ... math typesetting at 12 pt is ready.
+\endtt
+
+\_endinput
+
+2020-05-06: \itfam, \ttfam removed, (Unicode math preferred)
+2020-04-14: \skewchar\fam6 added
diff --git a/Master/texmf-dist/tex/optex/base/math-unicode.opm b/Master/texmf-dist/tex/optex/base/math-unicode.opm
new file mode 100644
index 00000000000..96f99833808
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/math-unicode.opm
@@ -0,0 +1,266 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \loadmath {Unicode Math fonts <2021-03-09>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\loadmath` `{<Unicode-math font>}` loads the given font. It does:
+   \begitems
+   * define \`\_unimathfont` as `<Unicode-math font>`,
+   * redefine `\normalmath` and `\boldmath` macros to their Unicode counterparts,
+   * load the `\_unimathfont` by `\normalmath`,
+   * print information about the loaded font on the terminal,
+   * redefine all encoding dependent setting by `\input unimath-codes.opm`,
+   * protect new loading by setting \`\_ifmathloading` to false.
+   \enditems
+   \`\noloadmath` disallows Unicode-math loading by \`\_mathloadingfalse`.\nl
+   \`\doloadmath` allows Unicode-math loading by \`\_mathloadingtrue`.
+   \_cod -----------------------------
+
+\_newifi \_ifmathloading   \_mathloadingtrue
+
+\_def\_noloadmath{\_mathloadingfalse}
+\_def\_doloadmath{\_mathloadingtrue}
+
+\_def\_loadmath#1{%
+   \_ifmathloading
+   \_initunifonts
+   \_isfont{#1}\_iffalse
+      \_opwarning{Math font "#1" not found, skipped...}%
+   \_else
+      \_def\_unimathfont{#1}%
+      \_let\_normalmath = \_normalunimath  \_let\_boldmath = \_boldunimath
+      \_normalmath
+      \_wterm {MATH-FONT: "#1" -- unicode math prepared.}%
+      \_ifx\_ncharrmA\_undefined \_opinput {unimath-codes.opm}\_fi
+      \_mathloadingfalse
+   \_fi\_fi}
+
+\_public \loadmath \noloadmath \doloadmath ;
+
+   \_doc -----------------------------
+   \`\loadboldmath` `{<bold-font>} \to {<normal-font>}`
+   defines \`\_unimathboldfont` as `<bold-font>` only if `\_unimathfont` is
+   defined as `<normal-font>`. It is used when \^`\boldmath` macro is run.
+   When no `\_unimathboldfont` is defined then the `\boldmath` macro
+   use \"fake bold" generated by `embolden` \LuaTeX/ font feature.
+   \_cod -----------------------------
+
+\_def\_loadboldmath#1#2\to #3{%
+   \_def\_tmp{#3}\_ifx\_unimathfont\_tmp % do work only if #3 is loaded as normal Math
+   \_isfont{#1}\_iffalse
+      \_opwarning{Bold-Math font "#1" not found, skipped...}
+   \_else
+      \_def\_unimathboldfont{#1}%
+      \_wterm {MATH-FONT: "#1" -- unicode math bold prepared.}%
+   \_fi\_fi}
+
+\_public \loadboldmath ;
+
+   \_doc -----------------------------
+   The Unicode version of the \^`\normalmath` and \^`\boldmath` macros
+   are defined here as \`\_normalunimath` and \`\_boldunimath` macros.
+   They are using \`\_setunimathdimens` in a similar sense as
+   \^`\_setmathdimens`.
+   \nl
+   You can combine more fonts if you register them to another
+   math families (5, 6, 7, etc.) in the \^`\normalmath` macro.
+   \nl
+   The default value of \^`\_normalunimath` shows a combination of base Unicode-math
+   font with 8bit Math font at family 4. See definition of `\script` macro where
+   `\fam4` is used.
+   \_cod -----------------------------
+
+\_def\_normalunimath{%
+    \_loadumathfamily 1 {\_unimathfont}{} % Base font
+    \_loadmathfamily  4 rsfs              % script
+    \_setunimathdimens
+}%
+\_def\_boldunimath{%
+    \_ifx\_unimathboldfont \_undefined
+       \_loadumathfamily 1 {\_unimathfont}{embolden=1.7;} % Base faked bold
+    \_else
+       \_loadumathfamily 1 {\_unimathboldfont}{} % Base real bold font
+    \_fi
+    \_loadmathfamily  4 rsfs              % script
+    \_setunimathdimens
+}%
+\_def\_setunimathdimens{% PlainTeX sets these dimens for 10pt size only:
+  \_delimitershortfall=0.5\_fontdimen6\_textfont3
+  \_nulldelimiterspace=0.12\_fontdimen6\_textfont3
+  \_scriptspace=0.05\_fontdimen6\_textfont3
+  \_begingroup % correction for \choose
+      \_everymath{}\_global\_setbox0=\_hbox{$\_fam1\_displaystyle{0\_atop0}$}\_endgroup
+  \_Umathfractiondelsize\_displaystyle = \_dimexpr(\_ht0-\_Umathaxis\_displaystyle)*2\_relax
+}
+
+   \_doc -----------------------------
+   If you try the example above about
+   \~`\loadboldmath``{[xitsmath-bold]} \to {[xitsmath-regular]}`
+   then you can find a bug in XITSMath-Bold font: the symbols for norm
+   $\|x\|$ are missing. So, we have to define `\_boldmath` macro manually.
+   The missing symbol is loaded from family 5 as no-bold variant in our example:
+   \begtt
+   \loadmath{[xitsmath-regular]}
+   \def\_boldmath{%
+      \_loadumathfamily 1 {[xitsmath-bold]}{} % Base font
+      \_loadmathfamily 4  rsfs % script
+      \_loadumathfamily 5 {[xitsmath-regular]}{}
+      \_def\|{\_Udelimiter 0 5 "02016 }%      % norm delimiter from family 5
+      \_setmathdimens
+   }
+   \endtt
+
+   \`\_loadumathfamily` `<number> {<font>}{<font features>}`
+   loads the given Unicode-math fonts in three sizes given by the
+   \^`\setmathsizes` macro and sets it as the math family `<number>`.
+   The `<font features>` are added to the default
+   \`\_mfontfeatures` and to the size-dependent features `+ssty=0`
+   if script size is asked or `+ssty=1` if scriptscriptsize is asked.
+   If the math family 1 is loaded then the family 2 and 3 are set by the same
+   font because \TeX/ needs to read dimension information about generating
+   math formulae from these three math families. All information needed by
+   \TeX/ is collected in single Unicode-math font.\nl
+   The \^`\_corrmsize` `<factor><space>` can be used just before
+   `\_loadumathfamily`, see section~\ref[math-preload] for more information.\nl
+   The \`\_textmff`, \`\_scriptmff` and \`\_sscriptmff` are additional font
+   features for text, script and sscript sizes respectively. They are
+   locally re-defined in \^`\mathbox` macro.
+   \_cod -----------------------------
+
+\_def\_umathname#1#2{"#1:\_mfontfeatures#2"}
+\_def\_mfontfeatures{mode=base;script=math;}
+
+\_def\_loadumathfamily #1 #2#3 {%
+  \_edef\_optsizesave{\_the\_optsize}%
+  \_optsize=\_sizemtext  \_font\_mF=\_umathname{#2}{\_textmff #3} at\_optsize
+  \_textfont#1=\_mF \_ifnum#1=1 \_textfont2=\_mF \_textfont3=\_mF \_fi
+  \_optsize=\_sizemscript \_font\_mF=\_umathname{#2}{\_scriptmff #3} at\_optsize
+  \_scriptfont#1=\_mF \_ifnum#1=1 \_scriptfont2=\_mF \_scriptfont3=\_mF \_fi
+  \_optsize=\_sizemsscript \_font\_mF=\_umathname{#2}{\_sscriptmff #3} at\_optsize
+  \_scriptscriptfont#1=\_mF \_ifnum#1=1 \_scriptscriptfont2=\_mF \_scriptscriptfont3=\_mF \_fi
+  \_optsize=\_optsizesave \_ptmunit=\_ptunit
+}
+\_def\_textmff{} \_def\_scriptmff{+ssty=0;} \_def\_sscriptmff{+ssty=1;}
+
+   \_doc -----------------------------
+   Unicode math font includes all typical math alphabets together, user needs not to
+   load more \TeX/ math families. These math alphabets are encoded by
+   different parts of Unicode table. We need auxiliary macros for setting
+   mathcodes by selected math alphabet.
+   \nl
+   \`\_umathrange` `{<from->-<to>}<class><family>\<first>` sets `\Umathcode`s
+   of the characters in the interval `<from>-<to>` to `\<first>`,
+   `\<first>+1`, `\<first>+2`
+   etc., but \`\_umathcharholes` are skipped
+   (`\_umathcharholes` are parts of the Unicode table not designed for math
+   alphabets but they cause that the math alphabets are
+   not continuously spread out in the table; I mean that the
+   designers were under the influence of drugs when they created
+   this part of the Unicode table).
+   The `<from>-<to>` clause includes normal letters like `A-Z`.
+   \nl
+   \`\_umahrangegreek` `\<first>` is the same as
+   `\_umathrange {<alpha>-<omega>}\<first>`.
+   \nl
+   \`\_umahrangeGREEK` `\<first>` is the same as
+   `\_umathrange {<Alpha>-<Omega>}\<first>`.
+   \nl
+   \`\_greekdef` `<control sequences> \_relax` defines each control sequence
+   as a normal character with codes `\_umathnumB`, `\_umathnumB+1`,
+   `\_umathnumB+2` etc. It is used for redefinig the contol sequences for
+   math Greek `\alpha`, `\beta`, `\gamma` etc.
+   \_cod -----------------------------
+
+\_newcount\_umathnumA  \_newcount\_umathnumB
+
+\_def\_umathcorr#1#2{\_ea#1\_ea{\_the#2}}
+\_def\_umathprepare#1{\_def\_umathscanholes##1[#1]##2##3\_relax{##2}}
+\_def\_umathvalue#1{\_ea\_umathscanholes\_umathcharholes[#1]{#1}\_relax}
+
+\_def\_umathcharholes{% holes in math alphabets:
+   [119893]{"210E}[119965]{"212C}[119968]{"2130}[119969]{"2131}%
+   [119971]{"210B}[119972]{"2110}[119975]{"2112}[119976]{"2133}[119981]{"211B}%
+   [119994]{"212F}[119996]{"210A}[120004]{"2134}%
+   [120070]{"212D}[120075]{"210C}[120076]{"2111}[120085]{"211C}[120093]{"2128}%
+   [120122]{"2102}[120127]{"210D}[120133]{"2115}[120135]{"2119}
+   [120136]{"211A}[120137]{"211D}[120145]{"2124}%
+}
+\_def\_umathrange#1#2#3#4{\_umathnumB=#4\_def\_tmp{#2 #3 }\_umathrangeA#1}
+\_def\_umathrangeA#1-#2{\_umathnumA=`#1\_relax
+   \_loop
+      \_umathcorr\_umathprepare\_umathnumB
+      \_Umathcode \_umathnumA = \_tmp \_umathcorr\_umathvalue{\_umathnumB}
+      \_ifnum\_umathnumA<`#2\_relax
+         \_advance\_umathnumA by1 \_advance\_umathnumB by1
+   \_repeat
+}
+\_def\_umathrangeGREEK{\_umathrange{^^^^0391-^^^^03a9}}
+\_def\_umathrangegreek{\_umathrange{^^^^03b1-^^^^03d6}}
+\_def\_greekdef#1{\_ifx#1\_relax \_else
+   \_begingroup \_lccode`X=\_umathnumB \_lowercase{\_endgroup \_def#1{X}}%
+   \_advance\_umathnumB by 1
+   \_ea\_greekdef \_fi
+}
+
+\_endcode
+
+
+The \^`\loadmath` `{<Unicode-math font>}` macro loads math fonts and
+redefines all default math-codes using `\input unimath-codes.opm`.
+If Unicode-math font is loaded then \^`\_mathloadingfalse`
+is set, so the new Unicode-math font isn't loaded until \^`\doloadmath` is used.
+
+\^`\loadboldmath` `{<bold-font>} \to {<normal-font>}` loads bold variant only
+if `<normal-font>` was sucessully loaded by the previous `\loadmath`. For example:
+
+\begtt
+\loadmath     {[xitsmath-regular]}
+\loadboldmath {[xitsmath-bold]} \to {[xitsmath-regular]}
+\endtt
+There are very few Unicode-math fonts with full \^`\boldmath` support.
+I know only XITSMath-Bold and KpMath-Bold. If \^`\loadboldmath` is not used
+then \"faked bold" created from \^`\normalmath` is used by default.
+
+The \^`\loadmath` macro was succesfully tested on:
+
+\begtt
+\loadmath{[XITSMath-Regular]}       ... XITS MATH
+\loadmath{[latinmodern-math]}       ... Latin Modern Math
+\loadmath{[texgyretermes-math]}     ... TeXGyre Termes Math
+\loadmath{[texgyrebonum-math]}      ... TeXGyre Bonum Math
+\loadmath{[texgyrepagella-math]}    ... TeXGyre Pagella Math
+\loadmath{[texgyreschola-math]}     ... TeXGyre Schola Math
+\loadmath{[texgyredejavu-math]}     ... TeXGyre DeJaVu Math
+\loadmath{[LibertinusMath-Regular]} ... Libertinus Math
+\loadmath{[FiraMath-Regular]}       ... Fira Math
+\loadmath{[Asana-Math]}             ... Asana Math
+\loadmath{[KpMath-Regular]}         ... KP fonts Math
+\endtt
+
+\secc Unicode-math macros preloaded in the format
+
+\printdoc math-unicode.opm
+
+
+\secc[unimath-codes] Macros and codes set when \code{\\loadmatfont} is processed
+
+The file `unimath-codes.opm` is loaded when the \^`\loadmath` is used. The
+macros here redefines globally all encoding dependent settings declared in
+the section~\ref[math-macros].
+
+\printdoc     unimath-codes.opm
+\printdoctail unimath-codes.opm
+
+\secc Printing all Unicode math slots in used math font
+
+\printdoctail print-unimath.opm
+\printdoc     print-unimath.opm
+
+\_endinput
+
+2021-03-09 \_setunimathdimes: \_begin/end/group instead {}, bug fixed
+2021-02-15 \_textmff, \_scriptmff and \_sscriptmff introduced
+2021-02-15 \_expandafter -> \_ea
+2020-06-07 \Umathfractiondelsize (for \choose brackets) corrected, see https://tug.org/pipermail/luatex/2020-June/007365.html
+2020-04-15 \_setmathdimens -> \_setuniathdimens
+2020-02-25 implemented
diff --git a/Master/texmf-dist/tex/optex/base/mathclass.opm b/Master/texmf-dist/tex/optex/base/mathclass.opm
new file mode 100644
index 00000000000..458431abcad
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/mathclass.opm
@@ -0,0 +1,1591 @@
+# File: MathClass.txt
+# Revision: 15
+# Date: 2017-06-01, 12:35:00 GMT
+#
+# © 2017 Unicode®, Inc.
+# Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the U.S. and other countries.
+# For terms of use, see http://www.unicode.org/terms_of_use.html
+# For documentation, see http://www.unicode.org/reports/tr25/
+#
+# ------------------------------------------------
+# This file is a classification of characters based on their usage in
+# mathematical notation.
+#
+# While the contents of this file represent the best information
+# available to the authors and the Unicode Technical Committee as
+# of the date referenced above, it is likely that the information
+# in this file will change from time to time.
+#
+# This file is *NOT* formally part of the Unicode Character Database
+# at this time.
+#
+# The character encoding of this plain-text file is UTF-8.
+#
+# The data consists of 2 fields.
+#
+# 1: code point or range
+#
+# 2: class, one of:
+#
+#	N - Normal - includes all digits and symbols requiring only one form
+#	A - Alphabetic
+#	B - Binary
+#	C - Closing - usually paired with opening delimiter
+#	D - Diacritic
+#	F - Fence - unpaired delimiter (often used as opening or closing)
+#	G - Glyph_Part - piece of large operator
+#	L - Large - n-ary or large operator, often takes limits
+#	O - Opening - usually paired with closing delimiter
+#	P - Punctuation
+#	R - Relation - includes arrows
+#	S - Space
+#	U - Unary - operators that are only unary
+#	V - Vary - operators that can be unary or binary depending on context
+#	X - Special - characters not covered by other classes
+#
+# Fields are delimited by ';'. Spaces adjacent to the delimiter or the '#' are
+# not significant. Future versions of this file may use different amounts of
+# whitespace.
+#
+# Some character positions in the Mathematical Alphanumeric Symbols block are
+# reserved and have been mapped to the Letterlike Symbols block in Unicode.
+# This is indicated in 24 special purpose comments.
+#
+# The character repertoire of this revision is the repertoire of Unicode
+# Version 9.0. For more information see Revision 15 or later of UTR #25.
+# ------------------------------------------------
+
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+0021;N
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+2AF1;N
+2AF2;R
+2AF3;R
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+2AF6;B
+2AF7;R
+2AF8;R
+2AF9;R
+2AFA;R
+2AFB;B
+2AFC;L
+2AFD;B
+2AFE;B
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+2B00..2B11;R
+2B12;N
+2B13;N
+2B14;N
+2B15;N
+2B16;N
+2B17;N
+2B18;N
+2B19;N
+2B1B..2B1F;N
+2B20;N
+2B21;N
+2B22;N
+2B23;N
+2B24..2B2F;N
+2B30..2B44;R
+2B45;R
+2B46;R
+2B47..2B4C;R
+2B50..2B54;N
+2B95;R
+2BC2..2BC8;N
+2BCA;N
+2BCB;N
+3008;X
+3009;X
+#3014;O
+#3015;C
+#3018;O
+#3019;C
+301A;X
+301B;X
+306E;N
+FB29;X
+FE00;D
+#deprecFE35;
+#deprecFE36;
+#deprecFE37;
+#deprecFE38;
+FE61..FE66;X
+FE68;X
+FF0B;X
+FF1C..FF1E;X
+FF3C;X
+FF3E;X
+FF5C;X
+FF5E;X
+FFE2;X
+FFE9..FFEC;X
+1D400..1D454;A
+#1D455=210E;N
+1D456..1D49B;A
+1D49C;A
+#1D49D=212C;A
+1D49E;A
+1D49F;A
+#1D4A0=2130;A
+#1D4A1=2131;A
+1D4A2;A
+#1D4A3=210B;A
+#1D4A4=2110;A
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+1D4A6;A
+#1D4A7=2112;A
+#1D4A8=2133;A
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+#1D506=212D;A
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+#1D50B=210C;A
+#1D50C=2111;A
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+#1D515=211C;A
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+#1D51D=2128;A
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+1D539;A
+#1D53A=2102;A
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+1D53D;A
+1D53E;A
+#1D53F=210D;A
+1D540;A
+1D541;A
+1D542;A
+1D543;A
+1D544;A
+#1D545=2115;A
+1D546;A
+#1D547=2119;A
+#1D548=211A;A
+#1D549=211D;A
+1D54A;A
+1D54B;A
+1D54C;A
+1D54D;A
+1D54E;A
+1D54F;A
+1D550;A
+#1D551=2124;A
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+1D554;A
+1D555;A
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+1D561;A
+1D562;A
+1D563;A
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+1D6A5;A
+1D6A8..1D7C9;A
+1D7CA;A
+1D7CB;A
+1D7CE..1D7FF;N
+1EE00..1EE03;A
+1EE05..1EE1F;A
+1EE21;A
+1EE22;A
+1EE24;A
+1EE27;A
+1EE29..1EE32;A
+1EE34..1EE37;A
+1EE39;A
+1EE3B;A
+1EE42;A
+1EE47;A
+1EE49;A
+1EE4B;A
+1EE4D..1EE4F;A
+1EE51;A
+1EE52;A
+1EE54;A
+1EE57;A
+1EE59;A
+1EE5B;A
+1EE5D;A
+1EE5F;A
+1EE61;A
+1EE62;A
+1EE64;A
+1EE67..1EE6A;A
+1EE6C..1EE72;A
+1EE74..1EE77;A
+1EE79..1EE7C;A
+1EE7E;A
+1EE80..1EE89;A
+1EE8B..1EE9B;A
+1EEA1..1EEA3;A
+1EEA5..1EEA9;A
+1EEAB..1EEBB;A
+1EEF0;L
+1EEF1;L
+1F784;N
+1F78C;N
+1F78D;N
+1F797..1F799;N
+1F79D..1F79F;N
+
+# EOF
diff --git a/Master/texmf-dist/tex/optex/base/more-macros.opm b/Master/texmf-dist/tex/optex/base/more-macros.opm
new file mode 100644
index 00000000000..d5ce88c1a67
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/more-macros.opm
@@ -0,0 +1,284 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \eoldef {OpTeX useful macos <2020-05-22>} % preloaded in format
+
+   \_doc -----------------------------
+   We define \`\opinput` `{<file name>}` macro which
+   does `\input {<file name>}` but the catcodes are set to normal catcodes
+   (like \OpTeX/ initializes them) and the catcodes setting is returned back to
+   the current values when the file is read. You can use `\opinput`
+   in any situation inside the document and you will be sure that the file
+   is read correctly with correct catcode settings.
+
+   To achieve this, we declare \`\optexcatcodes` catcode table
+   and \`\plaintexcatcodes`. They save the commonly used catcode tables.
+   Note that `\catcodetable` is a part of \LuaTeX/ extension.
+   The catcodetable stack is implemented by \OpTeX/ macros.
+   The \`\setctable` `<catcode table>` pushes 
+   current catcode table to the stack and activates catcodes from
+   the `<catcode table>`. The \`\restorectable` returns to the saved catcodes
+   from the catcode table stack.
+
+   The `\opinput` works inside the catcode table stack. It reads `\optexcatcodes`
+   table and stores it to \`\_tmpcatcodes`  table.
+   This table is actually used during `\input` (maybe catcodes are
+   changed here). Finally, `\_restoretable` pops the stacks and returns
+   to the catcodes used before `\opinput` is run.
+   \_cod -----------------------------
+
+\_def\_opinput #1{\_setctable\_optexcatcodes
+   \_savecatcodetable\_tmpcatcodes \_catcodetable\_tmpcatcodes
+   \_input {#1}\_relax\_restorectable}
+
+\_newcatcodetable \_optexcatcodes
+\_newcatcodetable \_plaintexcatcodes
+\_newcatcodetable \_tmpcatcodes
+
+\_public \optexcatcodes \plaintexcatcodes \opinput ;
+
+\_savecatcodetable\_optexcatcodes
+{\_catcode`_=8 \savecatcodetable\plaintexcatcodes}
+
+   \_doc -----------------------------
+   The implementation of the catcodetable stack follows. 
+
+   The current catcodes are
+   managed in the `\catcodetable0`. If the `\setctable` is used first (or at
+   the outer level of the stack), then the `\catcodetable0` is pushed to the
+   stack and the current table is re-set to the given `<catcode table>`.
+   The numbers of these tables are stacked to the \`\_ctablelist` macro.
+   The `\restorectable` reads the last saved catcode table number from the
+   `\_ctablelist` and uses it.
+   \_cod -----------------------------
+
+\_newcount\_currctable \_currctable=0
+\_catcodetable0
+
+\_def\_setctable#1{\_edef\_ctablelist{{\_the\_currctable}\_ctablelist}%
+   \_catcodetable#1\_relax \_currctable=#1\_relax
+}
+\_def\_restorectable{\_ea\_restorectableA\_ctablelist\_relax}
+\_def\_restorectableA#1#2\_relax{%
+   \_ifx^#2^\_opwarning
+      {You can't use \_noindent\restorectable without previous \_string\setctable}%
+   \_else \_def\_ctablelist{#2}\_catcodetable#1\_relax \_currctable=#1\_relax \_fi
+}
+\_def\_ctablelist{.}
+
+\_public \setctable \restorectable ;
+
+   \_doc -----------------------------
+   When a special macro is defined with different catcodes then
+   \`\normalcatcodes` can be used at the end of such definition. 
+   The normal catcodes are restored.
+   The macro reads
+   catcodes from `\optecatodes` table and sets it to the main catcode table 0.
+   \_cod -----------------------------
+
+\_def\_normalcatcodes {\_catcodetable\_optexcatcodes \_savecatcodetable0 \_catcodetable0 }
+\_public \normalcatodes ; 
+
+   \_doc -----------------------------
+   The \`\load` `[<filename-list>]` loads files specfied in
+   comma separated `<filename-list>`. The first space (after comma)
+   is ignored using the trick `#1#2,`: first parameter is unseparated.
+   The `\load` macro saves information about loaded files by setting
+   `\_load:<filename>` as a defined macro.
+
+   If the \`\_afterload` macro is defined then it is run after `\_opinput`.
+   The catcode setting should be here. Note that catcode setting done in the
+   loaded file is forgotten after the `\opinput`.
+   \_cod -----------------------------
+
+\_def \_load [#1]{\_loadA #1,,,\_end}
+\_def \_loadA #1#2,{\_ifx,#1 \_ea \_loadE \_else \_loadB{#1#2}\_ea\_loadA\_fi}
+\_def \_loadB #1{%
+   \_ifcsname _load:#1\_endcsname \_else
+      \_isfile {#1.opm}\_iftrue \_opinput {#1.opm}\_else \_opinput {#1}\_fi
+      \_sxdef{_load:#1}{}%
+      \_trycs{_afterload}{}\_let\_afterload=\_undefined
+   \_fi
+}
+\_def \_loadE #1\_end{}
+\_public \load ;
+
+   \_doc -----------------------------
+   The declarator \`\optdef``\macro [<opt default>] <params>{<replacement text>}` 
+   defines the `\macro` with the optional parameter followed by normal parameters
+   declared in `<params>`. The optional parameter must be used as the first
+   first parameter in brackets `[...]`. If it isn't used then <opt default>
+   is taken into account. The `<replacement text>` can use `\the\opt`
+   because optional parameter is saved to the \`\opt` tokens register.
+   Note the difference from \LaTeX/ concept where the optional parameter is
+   in `#1`. \OpTeX/ uses `#1` as the first normal parameter (if declared).
+
+   The \`\_nospaceafter` ignores the following optional space at expand
+   processor level using the negative `\romannumeral` trick.
+   \_cod -----------------------------
+
+\_def\_optdef#1[#2]{% 
+   \_def#1{\_opt={#2}\_isnextchar[{\_cs{_oA:\_string#1}}{\_cs{_oB:\_string#1}}}% 
+   \_sdef{_oA:\_string#1}[##1]{\_opt={##1}\_cs{_oB:\_string#1\_nospaceafter}}% 
+   \_sdef{_oB:\_string#1\_nospaceafter}% 
+} 
+\_def\_nospaceafter#1{\_ea#1\_romannumeral-`\.}
+\_newtoks\_opt
+
+\_public \opt \optdef ; 
+
+   \_doc -----------------------------
+   The declarator \`\eoldef``\macro #1{<replacement text>}` defines a `\macro`
+   which scans its parameter to the end of the current line.
+   This is the parameter `#1` which can be used in the `<replacement text>`.
+   The catcode of the `\endlinechar` is reset temporarily when the parameter is scanned. 
+
+   The macro defined by `\eoldef` cannot be used with its parameter inside
+   other macros because the catcode dancing is not possible here. But the
+   \`\bracedparam``\macro{<parameter>}` can be used here. The `\bracedparam`
+   is a prefix that re-sets temporarily the `\macro` to a `\macro` with
+   normal one parameter.
+
+   The \`\skiptoeol` macro reads the text to the end of the current line 
+   and ignores it.
+   \_cod -----------------------------
+
+\_def\_eoldef #1{\_def #1{\_begingroup \_catcode`\^^M=12 \_eoldefA #1}%
+   \_ea\_def\_csname _\_csstring #1:M\_endcsname}
+\_catcode`\^^M=12 %
+\_def\_eoldefA #1#2^^M{\_endgroup\_csname _\_csstring #1:M\_endcsname{#2}}%
+\_normalcatcodes %
+
+\_eoldef\_skiptoeol#1{}
+\_def\_bracedparam#1{\_ifcsname _\_csstring #1:M\_endcsname
+    \_csname _\_csstring #1:M\_ea \_endcsname
+    \_else \_csname __in\_csstring #1:M\_ea \_endcsname \_fi
+} 
+\_public \eoldef \skiptoeol \bracedparam ;
+
+   \_doc -----------------------------
+   \`\scantoeol``\macro <text to end of line>` scans the
+   `<text to end of line>` in verbatim mode and runs the
+   `\macro{<text to end of line>}`. The `\macro`
+   can be defined `\def\macro#1{...\scantextokens{#1}...}`.
+   The new tokenization of the parameter is processed when the parameter is used,
+   no when the parameter is scanned. This principle is used in definition
+   of \^`\chap`, \^`\sec`, \^`\secc` and \^`\_Xtoc` macros.
+   It means that user can write \code{\\sec text `&` text} for example.
+   Inline verbatim works in title sections.
+
+   The verbatim scanner of `\scatoeol` keeps category 7 for `^` in
+   order to be able to use `^^J` as comment character which means that
+   the next line continues.
+   \_cod -----------------------------
+
+\_def\_scantoeol#1{\def\_tmp{#1}\_begingroup \_setscancatcodes \_scantoeolA}
+\_def\_setscancatcodes{\_setverb \_catcode`\^^M=12\_catcode`\^=7\_catcode`\ =10\_catcode`\^^J=14 }
+\_catcode`\^^M=12 %
+\_def\_scantoeolA#1^^M{\_endgroup \_tmp{#1}}%
+\_normalcatcodes %
+
+\_public \scantoeol ;
+
+   \_doc -----------------------------
+   The \`\replstring``\macro{<textA>}{<textB>}`
+   replaces all occurrences of `<textA>` by `<textB>` in the `\macro` body.
+   The `\macro` must be defined without parameters. The occurrences of
+   `<textA>` are not replaced if they are \"hidden" in braces, for example
+   `...{...<textA>...}...`. The category codes in the `<textA>` must exactly
+   match.
+
+   How it works: `\replstring\foo{<textA>}{<textB>}` prepares
+   `\_replacestringsA#1<textA>{...}` and runs
+   `\_replacestringsA<foo-body>?<textA>!<textA>`.
+   So, `#1` includes the first part of <foo-body> before first <textA>.
+   It is saved to \`\_tmptoks` and `\_replacestringsB` is run in a loop.
+   It finishes processing or appends the next part to `\_tmptoks` separated by
+   <textB> and continues loop. The final part of the macro removes the last `?`
+   from resulting `\_tmptoks` and defines a new version of the `\foo`.
+   \_cod -----------------------------
+
+\_newtoks\_tmptoks
+\_catcode`!=3 \_catcode`?=3
+\_def\_replstring #1#2#3{%  \replstring #1{stringA}{stringB}
+   \_long\_def\_replacestringsA##1#2{\_tmptoks{##1}\_replacestringsB}%
+   \_long\_def\_replacestringsB##1#2{\_ifx!##1\_relax \_else \_toksapp\_tmptoks{#3##1}%
+                                     \_ea\_replacestringsB\_fi}%
+   \_ea\_replacestringsA #1?#2!#2%
+   \_long\_def\_replacestringsA##1?{\_tmptoks{##1}\_edef#1{\_the\_tmptoks}}%
+   \_ea\_replacestringsA \_the\_tmptoks}
+\_normalcatcodes
+
+\_public \replstring ;
+
+   \_doc -----------------------------
+   The \`\catcode` primitive is redefined here. Why?
+   There is very common cases like \code{\\catcode`}`<something>`
+   or `\catcode"<number>` but these characters
+   \code{\`} or \code{"} can be set as active (typically by `\verbchar` macro).
+   Nothing problematic happens if re-defined `\catcode` is used in this case.
+
+   If you really need primitive `\catcode` then you can use `\_catcode`.
+   \_cod -----------------------------
+
+\_def\catcode#1{\_catcode \_if`\_noexpand#1\_ea`\_else\_if"\_noexpand#1"\_else
+   \_if'\_noexpand#1'\_else \_ea\_ea\_ea\_ea\_ea\_ea\_ea#1\_fi\_fi\_fi}
+
+   \_doc -----------------------------
+   The \`\removespaces` `<text with spaces >{}` expands to <textwithoutspaces>.
+   \nl
+   The 	`\_ea`\`\ignorept``\the<dimen>` expands to a decimal
+   number `\the<dimen>` but without `pt` unit.
+   \_cod -----------------------------
+
+\_def\_removespaces #1 {\_isempty{#1}\_iffalse #1\_ea\_removespaces\_fi}
+\_ea\_def \_ea\_ignorept \_ea#\_ea1\_detokenize{pt}{#1}
+
+\public \removespaces \ignorept ;
+
+   \_doc -----------------------------
+   You can use expandable \`\bp``{<dimen>}` convertor from
+   \TeX/ `<dimen>` (or from an expression accepted by
+   `\dimexpr` primitive) to a decimal value in big points
+   (used as natural unit in the PDF format). So, you can write, for example:
+   \begtt
+   \pdfliteral{q \_bp{.3\hsize-2mm} \_bp{2mm} m 0 \_bp{-4mm} l S Q}
+   \endtt
+   You can use expandable \`\expr``{<expression>}` for analogical purposes.
+   It expands to the value of the `<expression>` at expand processor level
+   with \`\_decdigits` digits after the decimal point.
+   The `<expression>` can include `+-*/()` and decimal numbers in common syntax.
+
+   The usage of prefixed versions \`\_expr` or \`\_bp` is more recommended
+   because a user can re-define the control sequences `\expr` or `\bp`.
+   \_cod -----------------------------
+
+\_def\_decdigits{3} % digits after decimal point in \_bp and \_expr outputs.
+\_def\_pttopb{%
+   \_directlua{tex.print(string.format('\_pcent.\_decdigits f',
+               token.scan_dimen()/65781.76))}%  pt to bp conversion
+}
+\def\_bp#1{\_ea\_pttopb\_dimexpr#1\_relax}
+\def\_expr#1{\_directlua{tex.print(string.format('\_pcent.\_decdigits f',#1))}}
+
+\_public \expr \bp ;
+
+   \_doc ------------------
+   The pair {\`\_doc` ... \`\_cod`} is used for documenting macros and to
+   printing the technical documentation of the \OpTeX/. The syntax is:
+   {\begtt \catcode`\<=13
+   \_doc <ignored text>
+   <documentation>
+   \_cod <ignored text>
+   \endtt
+   }
+   The `<documentation>` (and `<ignored text>` too) must be `<balanced text>`. 
+   It means that you cannot document only the `{` but you must document the `}` too.
+   \_cod ------------------
+
+\_long\_def\_doc #1\_cod {\_skiptoeol}
+
+\_endcode % -------------------------------------
+
+2020-05-22 robust \catcode newly defined in order \catcode\string.... be possible
+2020-05-03 \load macro introduced
+2020-03-15 released
diff --git a/Master/texmf-dist/tex/optex/base/multicolumns.opm b/Master/texmf-dist/tex/optex/base/multicolumns.opm
new file mode 100644
index 00000000000..bf5b05f7db1
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/multicolumns.opm
@@ -0,0 +1,114 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \begmulti {Balanced columns <2020-03-26>} % preloaded in format
+
+   \_doc -----------------------------
+   This code is documented in detail in the \"\TeX/book naruby", pages 244--246,
+   free available, \url{http://petr.olsak.net/tbn.html}, but in Czech.
+   Roughly speaking, macros complete all material between
+   \`\begmulti``<num-columns>` and \`\endmulti`
+   into one `\vbox 6`. Then the macro measures the amount of free space at the current
+   page using `\pagegoal` and `\pagtotal` and does `\vsplit` of `\vbox 6` to
+   columns with a height of such free space. This is done only if we have
+   enough amount of material in `\vbox 6` to fill the full page by columns.
+   This is repeated in a loop until we have less amount of material in `\vbox 6`.
+   Then we run `\_balancecolumns` which balances the last part of the columns.
+   Each part of printed material is distributed to the main vertical list as
+   `\hbox{<columns>}` and we need not do any change in the output routine.
+
+   If you have paragraphs in `\begmulti`... `\endmulti` environment then
+   you may say `\raggedright` inside this environment and you can re-assign
+   `\widowpenalty` and `\clubppenalty` (they are set to 10000 in \OpTeX/).
+   \_cod -----------------------------
+
+\_def\_multiskip{\_medskip}      % space above and below \begmulti...\endmulti
+
+\_newcount\_mullines
+
+\_def\_begmulti #1 {\_par\_bgroup\_wipeepar\_multiskip\_penalty0 \_def\_Ncols{#1}
+   \_setbox6=\_vbox\_bgroup \_let\_setxhsize=\_relax \_penalty0
+   %% \hsize := column width = (\hsize+\colsep) / n - \colsep
+   \_advance\_hsize by\_colsep
+   \_divide\_hsize by\_Ncols  \_advance\_hsize by-\_colsep
+   \_mullines=0
+   \_def\par{\_ifhmode\_endgraf\_global\_advance\_mullines by\_prevgraf\_fi}%
+}
+\_def\_endmulti{\_vskip-\_prevdepth\_vfil
+   \_ea\_egroup\_ea\_baselineskip\_the\_baselineskip\_relax
+   \_dimen0=.8\_maxdimen \_tmpnum=\_dimen0 \_divide\_tmpnum by\_baselineskip
+   \_splittopskip=\_baselineskip
+   \_setbox1=\_vsplit6 to0pt
+   %% \dimen1 := the free space on the page
+   \_ifdim\_pagegoal=\_maxdimen \_dimen1=\_vsize \_corrsize{\_dimen1}
+   \_else \_dimen1=\_pagegoal \_advance\_dimen1 by-\_pagetotal \_fi
+   \_ifdim \_dimen1<2\_baselineskip
+     \_vfil\_break \_dimen1=\_vsize \_corrsize{\_dimen1} \_fi
+   \_ifnum\_mullines<\_tmpnum \_dimen0=\_ht6 \_else \_dimen0=.8\_maxdimen \_fi
+   \_divide\_dimen0 by\_Ncols \_relax
+   %% split the material to more pages?
+   \_ifdim \_dimen0>\_dimen1 \_splitpart
+   \_else \_balancecolumns \_fi  % only balancing
+   \_multiskip\_egroup
+}
+
+   \_doc -----------------------------
+   Splitting columns...
+   \_cod -----------------------------
+
+\_def\_makecolumns{\_bgroup % full page, destination height: \dimen1
+   \_vbadness=20000 \_setbox1=\_hbox{}\_tmpnum=0
+   \_loop \_ifnum\_Ncols>\_tmpnum
+      \_advance\_tmpnum by1
+      \_setbox1=\_hbox{\_unhbox1 \_vsplit6 to\_dimen1 \_hss}
+   \_repeat
+   \_hbox{}\_nobreak\_vskip-\_splittopskip \_nointerlineskip
+   \_line{\_unhbox1\_unskip}
+   \_dimen0=\_dimen1 \_divide\_dimen0 by\_baselineskip \_multiply\_dimen0 by\_Ncols
+   \_global\_advance\_mullines by-\_dimen0
+   \_egroup
+}
+\_def\_splitpart{%
+   \_makecolumns % full page
+   \_vskip 0pt plus 1fil minus\_baselineskip \_break
+   \_ifnum\_mullines<\_tmpnum \_dimen0=\_ht6 \_else \_dimen0=.8\_maxdimen \_fi
+   \_divide\_dimen0 by\_Ncols \_relax
+   \_ifx\_balancecolumns\_flushcolumns \_advance\_dimen0 by-.5\_vsize \_fi
+   \_dimen1=\_vsize \_corrsize{\_dimen1}\_dimen2=\_dimen1
+   \_advance\_dimen2 by-\_baselineskip
+   %% split the material to more pages?
+   \_ifvoid6 \_else
+      \_ifdim \_dimen0>\_dimen2 \_ea\_ea\_ea \_splitpart
+      \_else \_balancecolumns % last balancing
+   \_fi \_fi
+}
+
+   \_doc -----------------------------
+   Final balancing of the columns.
+   \_cod -----------------------------
+
+\_def\_balancecolumns{\_bgroup \_setbox7=\_copy6 % destination height: \dimen0
+   \_ifdim\_dimen0>\_baselineskip \_else \_dimen0=\_baselineskip \_fi
+   \_vbadness=20000
+   \_def\_tmp{%
+      \_setbox1=\_hbox{}\_tmpnum=0
+      \_loop \_ifnum\_Ncols>\_tmpnum
+         \_advance\_tmpnum by1
+         \_setbox1=\_hbox{\_unhbox1
+              \_ifvoid6 \_hbox to\_wd6{\_hss}\_else \_vsplit6 to\_dimen0 \_fi\_hss}
+      \_repeat
+   \_ifvoid6 \_else
+      \_advance \_dimen0 by.2\_baselineskip
+      \_setbox6=\_copy7
+      \_ea \_tmp \_fi}\_tmp
+   \_hbox{}\_nobreak\_vskip-\_splittopskip \_nointerlineskip
+   \_hbox to\_hsize{\_unhbox1\_unskip}%
+   \_egroup
+}
+\_def\_corrsize #1{%% #1 := #1 + \splittopskip - \topskip
+   \_advance #1 by \_splittopskip \_advance #1 by-\_topskip
+}
+\_public \begmulti \endmulti ;
+
+\_endcode % -------------------------------------
+
+
diff --git a/Master/texmf-dist/tex/optex/base/optex.ini b/Master/texmf-dist/tex/optex/base/optex.ini
new file mode 100644
index 00000000000..c695b7d8098
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/optex.ini
@@ -0,0 +1,107 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+%% OpTeX ini file
+%% Petr Olsak <project started from: Jan. 2020>
+
+% Catcodes:
+
+\catcode `\{=1 % left brace is begin-group character
+\catcode `\}=2 % right brace is end-group character
+\catcode `\$=3 % dollar sign is math shift
+\catcode `\&=4 % ampersand is alignment tab
+\catcode `\#=6 % hash mark is macro parameter character
+\catcode `\^=7 % 
+\catcode `\^^K=7 % circumflex and uparrow are for superscripts
+\catcode `\^^A=8 % downarrow is for subscripts
+\catcode `\^^I=10 % ascii tab is a blank space
+\catcode `\_=11 % underline can be used in control sequences
+\catcode `\~=13 % tilde is active
+\catcode `\^^a0=13 % non breaking space in Unicode
+\catcode 127=12 % normal character
+
+% OpTeX version
+
+\def\optexversion{1.01 Mar.2021}
+\def\fmtname{OpTeX}
+\let\fmtversion=\optexversion
+
+% Engine testing:
+
+\newlinechar=`\^^J
+\ifx\directlua\undefined 
+   \message{This format is based only on LuaTeX, use luatex -ini optex.ini^^J} 
+   \endinput \fi
+
+\ifx\bgroup\undefined \else
+   \message{This file can be used only for format initialisation, use luatex -ini^^J}
+   \endinput \fi
+
+% Basic .opm syntax:
+
+\let\_endcode =\endinput
+\def \_codedecl #1#2{\message{#2^^J}}%  information about .opm file
+\long\def\_doc#1\_cod#2 {} % skip documentation
+
+% Initialization:
+
+\message{OpTeX (Olsak's Plain TeX) initialization <\optexversion>^^J}
+
+\input prefixed.opm        % prefixed primitives and code syntax
+\input luatex-ini.opm      % luaTeX initialization
+\input basic-macros.opm    % basic macros
+\input alloc.opm           % allocators for registers
+\input if-macros.opm       % special \if-macros, \is-macros and loops
+\input parameters.opm      % parameters setting
+\input more-macros.opm     % OpTeX useful macros  (todo: doc)
+\input keyval.opm          % key=value dictionaries
+\input plain-macros.opm    % plainTeX macros
+\input fonts-preload.opm   % preloaded Latin Modern fonts  
+\input fonts-resize.opm    % font resizing (low-level macros)
+\input fonts-select.opm    % font selection system
+\input math-preload.opm    % math fams CM + AMS preloaded
+\input math-macros.opm     % basic macros for math plus mathchardefs
+\input math-unicode.opm    % macros for loading UnicodeMath fonts
+\input fonts-opmac.opm     % font managing macros from OPmac
+\input output.opm          % output routine
+\input margins.opm         % macros for margins setting
+\input colors.opm          % colors
+\input ref-file.opm        % ref file
+\input references.opm      % references
+\input hyperlinks.opm      % hyperlinks
+\input maketoc.opm         % maketoc
+\input outlines.opm        % PDF outlines
+\input pdfuni-string.opm   % PDFunicode strings for outlines
+\input sections.opm        % titles, chapters, sections
+\input lists.opm           % lists, \begitems, \enditems
+\input verbatim.opm        % verbatim
+\input hi-syntax.opm       % syntax highlighting of verbatim listimgs
+\input graphics.opm        % graphics
+\input table.opm           % table macro
+\input multicolumns.opm    % more columns by \begmulti ...\endmulti
+\input cite-bib.opm        % Bibliography, \cite
+\input makeindex.opm       % Make index and sorting
+\input fnotes.opm          % \fnotes, \mnotes
+\input styles.opm          % styles \report, \letter
+\input logos.opm           % standard logos
+\input uni-lcuc.opm        % Setting lccodes and uccodes for Unicode characters
+\input hyphen-lan.opm      % initialization of hyphenation patterns
+\input languages.opm       % languages
+\input others.opm          % miscenaleous
+
+\_directlua{
+   % preload OpTeX's lua code into format as bytecode
+   lua.bytecode[1] = assert(loadfile(kpse.find_file("optex", "lua")))
+}
+
+\_everyjob = {%
+   \_message{This is OpTeX (Olsak's Plain TeX), version <\optexversion>^^J}%
+   \_mathchardef\_fnotestack=\_pdfcolorstackinit page {0 g 0 G}%
+   \_directlua{lua.bytecode[1]()}% load OpTeX's Lua code
+   \_mathsbon % replaces \int_a^b to \int _a^b
+   \_inputref % inputs \jobname.ref if exists
+}
+
+\_dump
+
+\_endcode % ------------------------------
+
diff --git a/Master/texmf-dist/tex/optex/base/optex.lua b/Master/texmf-dist/tex/optex/base/optex.lua
new file mode 100644
index 00000000000..2d83f38ed6f
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/optex.lua
@@ -0,0 +1,356 @@
+-- This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+-- The basic lua functions and declarations used in \OpTeX/ are here
+
+-- GENERAL
+
+-- Error function used by following functions for critical errors.
+local function err(message)
+    error("\nerror: "..message.."\n")
+end
+--
+-- For a `\chardef`'d, `\countdef`'d, etc., csname return corresponding register
+-- number. The responsibility of providing a `\XXdef`'d name is on the caller.
+function registernumber(name)
+    return token.create(name).index
+end
+--
+-- ALLOCATORS
+alloc = alloc or {}
+--
+-- An attribute allocator in Lua that cooperates with normal \OpTeX/ allocator.
+local attributes = {}
+function alloc.new_attribute(name)
+    local cnt = tex.count["_attributealloc"] + 1
+    if cnt > 65534 then
+        tex.error("No room for a new attribute")
+    else
+        tex.setcount("global", "_attributealloc", cnt)
+        texio.write_nl("log", '"'..name..'"=\\attribute'..tostring(cnt))
+        attributes[name] = cnt
+        return cnt
+    end
+end
+--
+-- `provides_module` is needed by older version of luaotfload
+provides_module = function() end
+--
+-- CALLBACKS
+callback = callback or {}
+--
+-- Save `callback.register` function for internal use.
+local callback_register = callback.register
+function callback.register(name, fn)
+    err("direct registering of callbacks is forbidden, use 'callback.add_to_callback'")
+end
+--
+-- Table with lists of functions for different callbacks.
+local callback_functions = {}
+-- Table that maps callback name to a list of descriptions of its added
+-- functions. The order corresponds with `callback_functions`.
+local callback_description = {}
+--
+-- Table used to differentiate user callbacks from standard callbacks. Contains
+-- user callbacks as keys.
+local user_callbacks = {}
+-- Table containing default functions for callbacks, which are called if either
+-- a user created callback is defined, but doesn't have added functions or for
+-- standard callbacks that are \"extended" (see `mlist_to_hlist` and its pre/post
+-- filters below).
+local default_functions = {}
+--
+-- Table that maps standard (and later user) callback names to their types.
+local callback_types = {
+    -- file discovery
+    find_read_file     = "exclusive",
+    find_write_file    = "exclusive",
+    find_font_file     = "data",
+    find_output_file   = "data",
+    find_format_file   = "data",
+    find_vf_file       = "data",
+    find_map_file      = "data",
+    find_enc_file      = "data",
+    find_pk_file       = "data",
+    find_data_file     = "data",
+    find_opentype_file = "data",
+    find_truetype_file = "data",
+    find_type1_file    = "data",
+    find_image_file    = "data",
+
+    open_read_file     = "exclusive",
+    read_font_file     = "exclusive",
+    read_vf_file       = "exclusive",
+    read_map_file      = "exclusive",
+    read_enc_file      = "exclusive",
+    read_pk_file       = "exclusive",
+    read_data_file     = "exclusive",
+    read_truetype_file = "exclusive",
+    read_type1_file    = "exclusive",
+    read_opentype_file = "exclusive",
+
+    -- data processing
+    process_input_buffer  = "data",
+    process_output_buffer = "data",
+    process_jobname       = "data",
+    input_level_string    = "data",
+
+    -- node list processing
+    contribute_filter      = "simple",
+    buildpage_filter       = "simple",
+    build_page_insert      = "exclusive",
+    pre_linebreak_filter   = "list",
+    linebreak_filter       = "exclusive",
+    append_to_vlist_filter = "exclusive",
+    post_linebreak_filter  = "reverselist",
+    hpack_filter           = "list",
+    vpack_filter           = "list",
+    hpack_quality          = "list",
+    vpack_quality          = "list",
+    process_rule           = "exclusive",
+    pre_output_filter      = "list",
+    hyphenate              = "simple",
+    ligaturing             = "simple",
+    kerning                = "simple",
+    insert_local_par       = "simple",
+    mlist_to_hlist         = "exclusive",
+
+    -- information reporting
+    pre_dump             = "simple",
+    start_run            = "simple",
+    stop_run             = "simple",
+    start_page_number    = "simple",
+    stop_page_number     = "simple",
+    show_error_hook      = "simple",
+    show_error_message   = "simple",
+    show_lua_error_hook  = "simple",
+    start_file           = "simple",
+    stop_file            = "simple",
+    call_edit            = "simple",
+    finish_synctex       = "simple",
+    wrapup_run           = "simple",
+
+    -- pdf related
+    finish_pdffile            = "data",
+    finish_pdfpage            = "data",
+    page_order_index          = "data",
+    process_pdf_image_content = "data",
+
+    -- font related
+    define_font     = "exclusive",
+    glyph_not_found = "exclusive",
+    glyph_info      = "exclusive",
+
+    -- undocumented
+    glyph_stream_provider = "exclusive",
+    provide_charproc_data = "exclusive",
+}
+--
+-- Return a list containing descriptions of added callback functions for
+-- specific callback.
+function callback.callback_descriptions(name)
+    return callback_description[name] or {}
+end
+
+local valid_callback_types = {
+    exclusive = true,
+    simple = true,
+    data = true,
+    list = true,
+    reverselist = true,
+}
+--
+-- Create a user callback that can only be called manually using
+-- `call_callback`. A default function is only needed by "exclusive" callbacks.
+function callback.create_callback(name, cbtype, default)
+    if callback_types[name] then
+        err("cannot create callback '"..name.."' - it already exists")
+    elseif not valid_callback_types[cbtype] then
+        err("cannot create callback '"..name.. "' with invalid callback type '"..cbtype.."'")
+    elseif ctype == "exclusive" and not default then
+        err("unable to create exclusive callback '"..name.."', default function is required")
+    end
+
+    callback_types[name] = cbtype
+    default_functions[name] = default or nil
+    user_callbacks[name] = true
+end
+--
+-- Add a function to the list of functions executed when callback is called.
+-- For standard luatex callback a proxy function that calls our machinery is
+-- registered as the real callback function. This doesn't happen for user
+-- callbacks, that are called manually by user using `call_callback` or for
+-- standard callbacks that have default functions -- like `mlist_to_hlist` (see
+-- below).
+function callback.add_to_callback(name, fn, description)
+    if user_callbacks[name] or callback_functions[name] or default_functions[name] then
+        -- either:
+        --  a) user callback - no need to register anything
+        --  b) standard callback that has already been registered
+        --  c) standard callback with default function registered separately
+        --     (mlist_to_hlist)
+    elseif callback_types[name] then
+        -- This is a standard luatex callback with first function being added,
+        -- register a proxy function as a real callback. Assert, so we know
+        -- when things break, like when callbacks get redefined by future
+        -- luatex.
+        assert(callback_register(name, function(...)
+            return callback.call_callback(name, ...)
+        end))
+    else
+        err("cannot add to callback '"..name.."' - no such callback exists")
+    end
+
+    -- add function to callback list for this callback
+    callback_functions[name] = callback_functions[name] or {}
+    table.insert(callback_functions[name], fn)
+
+    -- add description to description list
+    callback_description[name] = callback_description[name] or {}
+    table.insert(callback_description[name], description)
+end
+--
+-- Remove a function from the list of functions executed when callback is
+-- called. If last function in the list is removed delete the list entirely.
+function callback.remove_from_callback(name, description)
+    local descriptions = callback_description[name]
+    local index
+    for i, desc in ipairs(descriptions) do
+        if desc == description then
+            index = i
+            break
+        end
+    end
+
+    table.remove(descriptions, index)
+    local fn = table.remove(callback_functions[name], index)
+
+    if #descriptions == 0 then
+        -- Delete the list entirely to allow easy checking of "truthiness".
+        callback_functions[name] = nil
+
+        if not user_callbacks[name] and not default_functions[name] then
+            -- this is a standard callback with no added functions and no
+            -- default function (i.e. not mlist_to_hlist), restore standard
+            -- behaviour by unregistering.
+            callback_register(name, nil)
+        end
+    end
+
+    return fn, description
+end
+--
+-- helper iterator generator for iterating over reverselist callback functions
+local function reverse_ipairs(t)
+    local i, n = #t + 1, 1
+    return function()
+        i = i - 1
+        if i >= n then
+            return i, t[i]
+        end
+    end
+end
+--
+-- Call all functions added to callback. This function handles standard
+-- callbacks as well as user created callbacks. It can happen that this
+-- function is called when no functions were added to callback -- like for user
+-- created callbacks or `mlist_to_hlist` (see below), these are handled either
+-- by a default function (like for `mlist_to_hlist` and those user created
+-- callbacks that set a default function) or by doing nothing for empty
+-- function list.
+function callback.call_callback(name, ...)
+    local cbtype = callback_types[name]
+    -- either take added functions or the default function if there is one
+    local functions = callback_functions[name] or {default_functions[name]}
+
+    if cbtype == nil then
+        err("cannot call callback '"..name.."' - no such callback exists")
+    elseif cbtype == "exclusive" then
+        -- only one function, atleast default function is guaranteed by
+        -- create_callback
+        return functions[1](...)
+    elseif cbtype == "simple" then
+        -- call all functions one after another, no passing of data
+        for _, fn in ipairs(functions) do
+            fn(...)
+        end
+        return
+    elseif cbtype == "data" then
+        -- pass data (first argument) from one function to other, while keeping
+        -- other arguments
+        local data = (...)
+        for _, fn in ipairs(functions) do
+            data = fn(data, select(2, ...))
+        end
+        return data
+    end
+
+    -- list and reverselist are like data, but "true" keeps data (head node)
+    -- unchanged and "false" ends the chain immediately
+    local iter
+    if cbtype == "list" then
+        iter = ipairs
+    elseif cbtype == "reverselist" then
+        iter = reverse_ipairs
+    end
+
+    local head = (...)
+    local new_head
+    local changed = false
+    for _, fn in iter(functions) do
+        new_head = fn(head, select(2, ...))
+        if new_head == false then
+            return false
+        elseif new_head ~= true then
+            head = new_head
+            changed = true
+        end
+    end
+    return not changed or head
+end
+--
+-- Create \"virtual" callbacks `pre/post_mlist_to_hlist_filter` by setting
+-- `mlist_to_hlist` callback. The default behaviour of `mlist_to_hlist` is kept by
+-- using a default function, but it can still be overriden by using
+-- `add_to_callback`.
+default_functions["mlist_to_hlist"] = node.mlist_to_hlist
+callback.create_callback("pre_mlist_to_hlist_filter", "list")
+callback.create_callback("post_mlist_to_hlist_filter", "reverselist")
+callback_register("mlist_to_hlist", function(head, ...)
+    -- pre_mlist_to_hlist_filter
+    local new_head = callback.call_callback("pre_mlist_to_hlist_filter", head, ...)
+    if new_head == false then
+        node.flush_list(head)
+        return nil
+    elseif new_head ~= true then
+        head = new_head
+    end
+
+    -- mlist_to_hlist means either added functions or standard luatex behavior
+    -- of node.mlist_to_hlist (handled by default function)
+    head = callback.call_callback("mlist_to_hlist", head, ...)
+
+    -- post_mlist_to_hlist_filter
+    new_head = callback.call_callback("post_mlist_to_hlist_filter", head, ...)
+    if new_head == false then
+        node.flush_list(head)
+        return nil
+    elseif new_head ~= true then
+        head = new_head
+    end
+    return head
+end)
+--
+-- Compatibility with \LaTeX/ through luatexbase namespace. Needed for
+-- luaotfload.
+luatexbase = {
+    registernumber = registernumber,
+    attributes = attributes,
+    provides_module = provides_module,
+    new_attribute = alloc.new_attribute,
+    callback_descriptions = callback.callback_descriptions,
+    create_callback = callback.create_callback,
+    add_to_callback = callback.add_to_callback,
+    remove_from_callback = callback.remove_from_callback,
+    call_callback = callback.call_callback,
+    callbacktypes = {}
+}
diff --git a/Master/texmf-dist/tex/optex/base/others.opm b/Master/texmf-dist/tex/optex/base/others.opm
new file mode 100644
index 00000000000..6ff15d4332f
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/others.opm
@@ -0,0 +1,106 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \uv {Miscenaleous <2020-05-22>} % preloaded in format
+
+    \_doc ----------------------------
+    \`\useOpTeX` and \`\useoptex` are declared as `\relax`.
+    \_cod ----------------------------
+
+\_let \useOpTeX = \_relax   \_let \useoptex = \_relax
+
+    \_doc ----------------------------
+    The \`\lastpage` and \`\totalpages` get the information from the
+    \^`\_currpage`. The \^`\_Xpage` from `.ref` file sets the \^`\_currpage`.
+    \_cod ----------------------------
+
+\_def\_totalpages {\_openref\_ea\_ignoresecond\_currpage}
+\_def\_lastpage   {\_openref\_ea\_usesecond\_currpage}
+\_def\_currpage {{0}{?}}
+\_public \lastpage \totalpages ;
+
+    \_doc ----------------------------
+    We need \`\uv`, \`\clqq`, \`\crqq`, \`\flqq`, \`\frqq`, \`\uslang`, \`\ehyph`
+    \`\chyph`, \`\shyph`, for backward compatibility with \csplain.
+    Codes are set according to Unicode because we are using Czech only in Unicode
+    when \LuaTeX/ is used.
+    \_cod ----------------------------
+
+
+% for compatibility with csplain:
+
+\_chardef\clqq=8222  \_chardef\crqq=8220
+\_chardef\flqq=171   \_chardef\frqq=187
+\_chardef\promile=8240
+
+\_def\uv#1{\clqq#1\crqq}
+
+\_let\uslang=\enlang  \_let\ehyph=\enlang
+\_let\chyph=\cslang   \_let\shyph=\sklang
+\_let\csUnicode=\csPatt \_let\czUnicode=\csPatt \_let\skUnicode=\skPatt
+
+    \_doc ----------------------------
+    The \`\letfont` was used in \csplain/ instead of `\fontlet`.
+    \_cod ----------------------------
+
+\_let \letfont = \_fontlet
+
+    \_doc ----------------------------
+    Non-breaking space in Unicode.
+    \_cod ----------------------------
+
+\let ^^a0=~
+
+    \_doc ----------------------------
+    TikZ needs these funny control sequences.
+    \_cod ----------------------------
+
+\_ea\_toksdef \_csname toks@\_endcsname=0
+\_ea\_let     \_csname voidb@x\_endcsname=\_voidbox
+
+    \_doc ----------------------------
+    We don't want to read `opmac.tex` unless `\input opmac` is specified.
+    \_cod ----------------------------
+
+\_def\OPmacversion{OpTeX}
+
+    \_doc ----------------------------
+    We allow empty lines in math formulae. It is more comfortable.
+    \_cod ----------------------------
+
+\_suppressmathparerror = 1
+
+    \_doc ----------------------------
+    Lorem ipsum can be printed by \`\lipsum``[<range>]` or \`\lorem``[<range>]`,
+    for example `\lipsum[3]` or `\lipsum[112-121]`, max=150.
+
+    First usage of `\lipsum` reads the \LaTeX/ file `lipsum.ltd.tex`
+    by \`\_lipsumload`
+    and prints the selected paragraph(s). Next usages of `\lipsum`
+    prints the selected paragraph(s) from memory. This second and more
+    usages of `\lipsum` are fully expandable. If you want to have all
+    printings of `\lipsum` expandable, use dummy `\lipsum[0]` first.
+
+    `\lipsum` adds `\par` after each printed paragraph. If you don't need
+    such `\par` here, use \`\lipsumtext``[<number>]`.
+    This macro prints only one selected paragraph <number> and does not add `\par`.
+    \_cod ----------------------------
+
+\_def\_lipsumtext[#1]{\_lipsumload\_cs{_lip:#1}}
+\_def\_lipsum[#1]{\_lipsumA #1\_empty-\_empty\_end}
+\_def\_lipsumA #1-#2\_empty#3\_end{%
+   \_fornum #1..\_ifx^#2^#1\_else#2\_fi \_do {\_lipsumtext[##1]\par}}
+\_def\_lipsumload{{%
+   \_setbox0=\_vbox{\_tmpnum=0 % vertical mode during \input lipsum.ltd.tex
+      \_def\ProvidesFile##1[##2]{}%
+      \_def\NewLipsumPar{\_incr\_tmpnum \_sxdef{_lip:\_the\_tmpnum}}%
+      \_opinput {lipsum.ltd.tex}%
+      \_global\_let\_lipsumload=\_empty
+   }}}
+\_public \lipsum \lipsumtext ;
+\_let \lorem=\lipsum
+
+\_endcode
+
+2021-01-04 \lipsumtext introduced
+2020-05-22 \lipsum uses \fornum (expandable after first usage)
+2020-04-02 released
diff --git a/Master/texmf-dist/tex/optex/base/outlines.opm b/Master/texmf-dist/tex/optex/base/outlines.opm
new file mode 100644
index 00000000000..6230d8988b8
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/outlines.opm
@@ -0,0 +1,108 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \outlines {PDF outlines <2021-02-09>} % preloaded in format
+
+\_def\_outlines#1{\_pdfcatalog{/PageMode/UseOutlines}\_openref
+   \_ifx\_toclist\_empty
+     \_opwarning{\_noexpand\outlines -- data unavailable. TeX me again}%
+     \_incr\_unresolvedrefs
+   \_else
+     \_ifx\_dest\_destactive \_else
+        \_opwarning{\_noexpand\outlines doesn't work when \_noexpand\hyperlinks isn't declared}\_fi
+     {\_let\_tocline=\_outlinesA
+      \_count0=0 \_count1=0 \_count2=0 \_count3=0 \_toclist % calculate numbers o childs
+      \_def\_outlinelevel{#1}\_let\_tocline=\_outlinesB
+      \_tocrefnum=0 \_count0=0 \_count1=0 \_count2=0 \_count3=0
+      \_toclist}% create outlines
+   \_fi
+}
+\_def\_outlinesA#1#2#3#4#5#6#7{%
+   \_isequal{\relax}{#4}\_iffalse
+      \_advance\_count#1 by1
+      \_ifcase#1\_or
+         \_addoneol{_ol:\_the\_count0}\_or
+         \_addoneol{_ol:\_the\_count0:\_the\_count1}\_or
+         \_addoneol{_ol:\_the\_count0:\_the\_count1:\_the\_count2}\_or
+         \_addoneol{_ol:\_the\_count0:\_the\_count1:\_the\_count2:\_the\_count3}\_fi
+   \_fi
+}
+\_def\_addoneol#1{%
+   \_ifcsname #1\_endcsname
+           \_tmpnum=\_csname#1\_endcsname\_relax
+           \_advance\_tmpnum by1 \_sxdef{#1}{\_the\_tmpnum}%
+   \_else \_sxdef{#1}{1}%
+   \_fi
+}
+\_def\_outlinesB#1#2#3#4#5#6#7{%
+   \_advance\_tocrefnum by1
+   \_isequal{\relax}{#4}\_iffalse
+      \_advance\_count#1 by1
+      \_ifcase#1%
+         \_tmpnum=\_trycs{_ol:\_the\_count0}{0}\_or
+         \_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1}{0}\_relax\_or
+         \_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1:\_the\_count2}{0}\_relax\_or
+         \_tmpnum=\_trycs{_ol:\_the\_count0:\_the\_count1:\_the\_count2:\_the\_count3}{0}\_relax\_or
+         \_tmpnum = 0\_relax\_fi
+      \_isempty{#4}\_iftrue \_pdfunidef\_tmp{#5}\_else \_pdfunidef\_tmp{#4}\_fi
+      \_outlinesC{toc:\_the\_tocrefnum}{\_ifnum#1<\_outlinelevel\_space\_else-\_fi}{\_tmpnum}{\_tmp}%
+   \_fi
+}
+\_def\_outlinesC#1#2#3#4{\_pdfoutline goto name{#1} count #2#3{#4}\_relax}
+
+\_newcount\_oulnum
+\_def\_insertoutline#1{\_incr\_oulnum
+   \_pdfdest name{oul:\_the\_oulnum} xyz\_relax
+   \_pdfunidef\_tmp{#1}%
+   \_pdfoutline goto name{oul:\_the\_oulnum} count0 {\_tmp}\_relax
+}
+\_public \outlines \insertoutline ;
+
+\_endcode % ----------------------------
+
+The problem is that PDF format needs to know the number of direct
+descendants of each outline if we need to create the tree of structured
+outlines. But we know only the level of each outline. The required data
+should be calculated from TOC data. We use two steps over TOC data saved in
+the `\_toclist` where each record is represented by one `\_tocline`.
+
+The first step, the \`\outlines` macro sets `\_tocline` to \`\_outlinesA` and
+calculates the number of direct descendants of each record. The second step,
+the `\outlines` macro sets `\_tocline` to \`\_outlinesB` and it uses prepared
+data and creates outlines.
+
+Each outline is mapped to the control sequence of the type
+`\_ol:<num>` or `\_ol:<num>:<num>` or `\_ol:<num>:<num>:<num>` or etc.
+The first one is reserved for level 0, the second one for level 1 (chapters), the third
+one for level 2 (sections) etc. The number of direct descendants will be stored
+in these macros after the first step is finished. Each new outline of a given level
+increases the `<num>` at the given level. When the first step is processed then
+(above that) the `\_ol:..` sequence of the parent increases its value too. The
+`_ol:...` sequences are implemented by `\_ol:\_count0:\_count1:\count2` etc.
+For example, when section (level 2) is processed in the first step then we do:
+
+\begtt
+   \advance \count2 by 1
+                    % increases the mapping pointer of the type
+                    % \_ol:\_count0:\_count1:\_count2 of this section
+   \advance \_ol:\_count0:\_count1 by 1
+                    % increases the number of descendants connected
+                    % to the parent of this section.
+\endtt
+
+When the second step is processed, then we only read the stored data about the
+number of descendants. And we use it in `count` parameter of `\_pdfoutline`
+primitive.
+
+For linking, we use the same links as in TOC, i.e. the `toc:\_the\_tocrefnum`
+labels are used.
+
+\`\insertoutline` `{<text>}` inserts one outline with zero direct descendants.
+It creates a link destination of the type `oul:<num>` into the document
+(where \^`\insertoutline` is used) and the link itself is created too in the
+outline.
+
+\endinput
+
+2021-02-15 \_advance -> \_incr
+2021-02-09 \thisoutline implemented
+2020-03-12 released
diff --git a/Master/texmf-dist/tex/optex/base/output.opm b/Master/texmf-dist/tex/optex/base/output.opm
new file mode 100644
index 00000000000..5bb93c24773
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/output.opm
@@ -0,0 +1,267 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \nopagenumbers {Output routine <2021-02-25>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\_optexoutput` is the default output routine. You can create another...
+   \_cod -----------------------------
+
+\_output={\_optexoutput}
+\_def \_optexoutput{\_begoutput \_shipout\_completepage \_endoutput}
+
+   \_doc -----------------------------
+   Default \`\_begoutput` and \`\_endoutput` is defined.
+   If you need another functionality implemented in the output routine, you can
+   \^`\addto``\_begoutput{...}` or \^`\addto``\_endoutput{...}`. The settings
+   here are local in the `\output` group.
+
+   The \`\_prepoffsets` can set `\hoffset` differently for the left or right
+   page. It is re-defined by the \^`\margins` macro..
+
+   The \^`\_regmark` tokens list includes accumulated `#2` from the \^`\regmacro`.
+   Logos and other macros are re-defined here (locally) for their usage
+   in headlines or footlines.
+   \_cod -----------------------------
+
+\_def \_begoutput{\_incr\_gpageno
+   \_immediate\_wref\_Xpage{{\_the\_gpageno}{\_folio}}%
+   \_setxhsize \_prepoffsets \_the\_regmark}
+\_def \_endoutput{\_advancepageno
+   {\_globaldefs=1 \_the\_nextpages \_nextpages={}}%
+   \_ifnum\_outputpenalty>-20000 \_else\_dosupereject\_fi
+}
+\_def \_prepoffsets {}
+
+   \_doc -----------------------------
+   The `\hsize` value can be changed at various places in the document but
+   we need to have a constant value \`\_xhsize` in the output routine
+   (for headlines and footlines, for instance). This value is set
+   from the current value of `\hsize` when \`\_setxhsize` macro is called.
+   This macro destroys itself, so the value is set only once. Typically it is
+   done in \^`\margins` macro or
+   when first \^`\_optexoutput` routine is called (see \^`\_begoutput`).
+   Or it is called at the begining of the \^`\begtt`...`\endtt` environment before
+   `\hsize` value is eventually changed by the user in this environment.
+   \_cod -----------------------------
+
+\_newdimen \_xhsize
+\_def\_setxhsize {\_global\_xhsize=\_hsize \_global\_let\_setxhsize=\_relax}
+
+   \_doc -----------------------------
+   \`\gpageno` counts pages from one in the whole document
+   \_cod -----------------------------
+
+\_newcount\_gpageno
+\_public \gpageno ;
+
+   \_doc -----------------------------
+   The \`\_completepage` is similar to what plain \TeX/ does in its output routine.
+   New is only \`\_backgroundbox`. It is `\vbox` with zero height with its
+   contents (from \^`\pgbackground`) extended down. It is shifted directly to the
+   left-upper corner of the paper.
+
+   The \`\_ensureblack` sets the typesetting of its parameter locally to `\Black`
+   color. We needn't do this if colors are never used in the document. So,
+   the default value of the `\_ensureblack` macro is empty. But the first usage of
+   color macros in the document re-defines `\_ensureblack`.
+   See the section~\ref[colors] for more details.
+   \_cod -----------------------------
+
+\_def\_completepage{\_vbox{%
+     \_istoksempty \_pgbackground
+        \_iffalse \_ensureblack{\_backgroundbox{\_the\_pgbackground}}\_nointerlineskip \_fi
+     \_ensureblack{\_makeheadline}%
+     \_vbox to\_vsize {\_boxmaxdepth=\_maxdepth \_pagecontents}% \pagebody in plainTeX
+     \_ensureblack{\_makefootline}}%
+}
+\_def \_ensureblack #1{#1} % will be re-defined by color macros
+\_let \_openfnotestack = \_relax % will be re-defined by color macros
+\_def \_backgroundbox #1{\_moveleft\_hoffset\_vbox to\_zo{\_kern-\_voffset #1\_vss}}
+
+   \_doc -----------------------------
+   \`\_makeheadline` creates `\vbox to0pt` with its contents (the \^`\headline`)
+   shifted by \^`\headlinedist` up.
+   \_cod -----------------------------
+
+\_def\_makeheadline {\_istoksempty \_headline \_iffalse
+   \_vbox to\_zo{\_vss
+                 \_baselineskip=\_headlinedist \_lineskiplimit=-\_maxdimen
+                 \_hbox to\_xhsize{\_the\_headline}\_hbox{}}\_nointerlineskip
+   \_fi
+}
+
+   \_doc -----------------------------
+   The \`\_makefootline` appends the \^`\footline` to the page-body box.
+   \_cod -----------------------------
+
+\_def\_makefootline{\_istoksempty \_footline \_iffalse
+      \_baselineskip=\_footlinedist
+      \_lineskiplimit=-\_maxdimen \_hbox to\_xhsize{\_the\_footline}
+   \_fi
+}
+
+   \_doc -----------------------------
+   The \`\_pagecontents` is similar as in plain \TeX/. The only differnece is
+   that the \`\_pagedest` is inserted at the top of `\_pagecontents` and
+   \^`\_ensureblack` is applied to the \^`\topins` and \^`\footins` material.\nl
+   The \`\_footnoterule` is defined here.
+   \_cod -----------------------------
+
+\_def\_pagecontents{\_pagedest % destination of the page
+  \_ifvoid\_topins \_else \_ensureblack{\_unvbox\_topins}\_fi
+  \_dimen0=\_dp255 \_unvbox255 % open up \box255
+  \_ifvoid\_footins \_else % footnote info is present
+    \_vskip\_skip\_footins
+    \_ensureblack{\_footnoterule \_openfnotestack \_unvbox\_footins}\_fi
+  \_kern-\_dimen0 \_vskip \_pgbottomskip
+}
+\_def \_pagedest {{\_def\_destheight{25pt}\_dest[pg:\_the\_gpageno]}}
+\_def \_footnoterule {\_kern-3pt \_hrule width 2truein \_kern 2.6pt }
+
+   \_doc -----------------------------
+   \`\pageno`, \`\folio`, \`\nopagenumbers`, \`\advancepageno`
+   and \`\normalbottom`
+   used in the context of the output routine
+   from plain \TeX/ is defined here.
+   Only the \`\raggedbottom` macro is defined differently. We use the
+   \^`\pgbottomskip` register here which is set to 0\,pt by default.
+   \_cod -----------------------------
+
+\_countdef\_pageno=0 \_pageno=1 % first page is number 1
+\_def \_folio {\_ifnum\_pageno<0 \_romannumeral-\_pageno \_else \_number\_pageno \_fi}
+\_def \_nopagenumbers {\_footline={}}
+\_def \_advancepageno {%
+   \_ifnum\_pageno<0 \_decr\_pageno \_else \_incr\_pageno \_fi
+} % increase |pageno|
+\_def \_raggedbottom {\_topskip=\_dimexpr\_topskip plus60pt \_pgbottomskip=0pt plus1fil\_relax}
+\_def \_normalbottom {\_topskip=\_dimexpr\_topskip \_pgbottomskip=0pt\_relax}
+
+\_public \pageno \folio \nopagenumbers \advancepageno \raggedbottom \normalbottom ;
+
+   \_doc -----------------------------
+   Macros for footnotes are the same as in plain \TeX. There is only one
+   difference: \`\vfootnote` is implemented as \`\_opfootnote` with empty
+   parameter `#1`. This parameter should do local settings inside
+   the \`\footins` group and it does it when `\fnote` macro is used.\nl
+   The `\_opfootnote` nor `\vfootnote` don't take the footnote text
+   as a parameter. This is due to a user can do catcode settings (like inline
+   verbatim) in the footnote text. This idea is adapted from plain \TeX.\nl
+   The \`\footnote` and \`\footstrut` is defined as in plain \TeX/.
+   \_cod -----------------------------
+
+\_newinsert\_footins
+\_def \_footnote #1{\_let\_osf=\_empty % parameter #2 (the text) is read later
+   \_ifhmode \_edef\_osf{\_spacefactor\_the\_spacefactor}\/\_fi
+  #1\_osf\_vfootnote{#1}}
+\_def\_vfootnote{\_opfootnote{}}
+\_def \_opfootnote #1#2{\_insert\_footins\_bgroup
+  \_interlinepenalty=\_interfootnotelinepenalty
+  \_leftskip=\_zo \_rightskip=\_zo \_spaceskip=\_zo \_xspaceskip=\_zo \_relax
+  \_let\_colorstackcnt=\_fnotestack % special color stack for footnotes
+  #1\_relax % local settings used by \fnote macro
+  \_splittopskip=\_ht\_strutbox % top baseline for broken footnotes
+  \_splitmaxdepth=\_dp\_strutbox \_floatingpenalty=20000
+  \_textindent{#2}\_footstrut
+  \_isnextchar \_bgroup
+     {\_bgroup \_aftergroup\_vfootA \_afterassignment\_ignorespaces \_let\_next=}{\_vfootB}%
+}
+\_def\_vfootA{\_unskip\_strut\_isnextchar\_colorstackpop\_closefncolor\_vfootF}
+\_def\_vfootB #1{#1\_unskip\_strut\_vfootF}
+\_def\_vfootF{\_egroup} % close \_insert\_footins\_bgroup
+\_def\_closefncolor#1{#1\_isnextchar\_colorstackpop\_closefncolor\_vfootF}
+\_def \_footstrut {\_vbox to\_splittopskip{}}
+\_skip\_footins=\_bigskipamount % space added when footnote is present
+\_count\_footins=1000 % footnote magnification factor (1 to 1)
+\_dimen\_footins=8in % maximum footnotes per page
+\_public
+   \footins \footnote \vfootnote \footstrut ;
+
+   \_doc -----------------------------
+   The \`\topins` macros
+   \`\topinsert`, \`\midinsert`, \`\pageinsert`, \`\endinsert`
+   are the same as in plain \TeX/.
+   \_cod -----------------------------
+
+\_newinsert\_topins
+\_newifi\_ifupage \_newifi\_ifumid
+\_def \_topinsert {\_umidfalse \_upagefalse \_oins}
+\_def \_midinsert {\_umidtrue \_oins}
+\_def \_pageinsert {\_umidfalse \_upagetrue \_oins}
+\_skip\_topins=\_zoskip % no space added when a topinsert is present
+\_count\_topins=1000 % magnification factor (1 to 1)
+\_dimen\_topins=\_maxdimen % no limit per page
+\_def \_oins {\_par \_begingroup\_setbox0=\_vbox\_bgroup} % start a \_vbox
+\_def \_endinsert {\_par\_egroup % finish the \_vbox
+  \_ifumid \_dimen0=\_ht0 \_advance\_dimen0 by\_dp0 \_advance\_dimen0 by\_baselineskip
+    \_advance\_dimen0 by\_pagetotal \_advance\_dimen0 by-\_pageshrink
+    \_ifdim\_dimen0>\_pagegoal \_umidfalse \_upagefalse \_fi \_fi
+  \_ifumid \_bigskip \_box0 \_bigbreak
+  \_else \_insert \_topins {\_penalty100 % floating insertion
+    \_splittopskip=0pt
+    \_splitmaxdepth=\_maxdimen \_floatingpenalty=0
+    \_ifupage \_dimen0=\_dp0
+    \_vbox to\_vsize {\_unvbox0 \_kern-\_dimen0}% depth is zero
+    \_else \_box0 \_nobreak \_bigskip \_fi}\_fi\_endgroup}
+
+\_public \topins \topinsert \midinsert \pageinsert \endinsert ;
+
+   \_doc -----------------------------
+   The \`\draft` macro is an example of usage `\_pgbackground` to create
+   watercolor marks.
+   \_cod -----------------------------
+
+\_def \_draft {\_pgbackground={\_draftbox{\_draftfont DRAFT}}%
+   \_fontdef\_draftfont{\_setfontsize{at10pt}\_bf}%
+   \_global\_let\_draftfont=\_draftfont
+}
+\_def \_draftbox #1{\_setbox0=\_hbox{#1}%
+   \_kern.5\_vsize \_kern\_voffset \_kern4.5\_wd0
+   \_hbox to0pt{\_kern.5\_xhsize \_kern\_hoffset \_kern-2\_wd0
+   \_pdfsave \_pdfrotate{55}\_pdfscale{10}{10}%
+   \_hbox to0pt{\_localcolor\_setgreycolor{.8}\_box0\_hss}%
+   \_pdfrestore
+   \_hss}%
+}
+\_public \draft ;
+
+\_endcode % -------------------------------------
+
+
+The output routine \^`\_optexoutput` is similar as in plain \TeX. It does:
+
+\begitems
+* \^`\_begoutput` which does:
+  \begitems
+  * increments \^`\gpageno`,
+  * prints `\_Xpage{<gpageno>}{<pageno>}` to the `.ref` file
+    (if \^`\openref` is active),
+  * calculates `\hoffset`,
+  * sets local meaning of macros used in headlines/footlines (see \^`\regmacro`).
+  \enditems
+* `\shipout`\^`\_completepage`, which is `\vbox` of --
+  \begitems
+  * backrground box, if \^`\pgbackground` is non-empty,
+  * headline box by \^`\_makeheadline`, if the \^`\headline` is nonempty,
+  * `\vbox to\vsize` of \^`\_pagecontents` which cosnists of --
+    \begitems
+    * \^`\_pagedest`, the page destination `pg:<gpageno>` for hyperlinks is created here,
+    * \^`\topins` box if non-empty (from \^`\topinsert`s),
+    * `\box255` with completed vertical material from main vertical mode,
+    * \^`\_footnoterule` and \^`\footins` box if nonempty (from \^`\fnote`, \^`\footnote`),
+    * \^`\pgbottomskip` (default is 0\,pt).
+    \enditems
+  * footline box by `\_makefootline`, if the \^`\footline` is nonempty
+  \enditems
+* \^`\_endoutput` which does:
+  \begitems
+  * increments \^`\pageno` using \^`\advancepageno`
+  * runs output routine repeatedly if \^`\dosupereject` is activated.
+  \enditems
+\enditems
+
+\_endinput
+
+2021-02-25 \_draftbox improved
+2021-02-15 \_advance -> \_decr
+2020-05-12 \vfootB: \uskip -> \unskip bug fixed
+2020-03-28 Released
diff --git a/Master/texmf-dist/tex/optex/base/parameters.opm b/Master/texmf-dist/tex/optex/base/parameters.opm
new file mode 100644
index 00000000000..c8df6eec491
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/parameters.opm
@@ -0,0 +1,588 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \normalbaselineskip {Parameter settings <2020-03-17>} % preloaded in format
+
+   \_doc -----------------------------
+   \secc Primitive registers
+   The primitive registers with the same default value as in plain \TeX/ follow:
+   \_cod -----------------------------
+
+\_parindent=20pt     % indentation of paragraphs
+\_pretolerance=100   % parameters used in paragraph breaking algorithm
+\_tolerance=200
+\_hbadness=1000
+\_vbadness=1000
+\_doublehyphendemerits=10000
+\_finalhyphendemerits=5000
+\_adjdemerits=10000
+\_uchyph=1
+\_defaulthyphenchar=`\-
+\_defaultskewchar=-1
+\_hfuzz=0.1pt
+\_vfuzz=0.1pt
+\_overfullrule=5pt
+\_linepenalty=10     % penalty between lines inside the paragraph
+\_hyphenpenalty=50   % when a word is bro-ken
+\_exhyphenpenalty=50 % when the hyphenmark is used explicitly
+\_binoppenalty=700   % between binary operators in math
+\_relpenalty=500     % between relations in math
+\_brokenpenalty=100  % after lines if they end by a broken word.
+\_displaywidowpenalty=50   % before last line of paragraph if display math follows
+\_predisplaypenalty=10000  % above display math
+\_postdisplaypenalty=0     % below display math
+\_delimiterfactor=901 % parameter for scaling delimiters
+\_delimitershortfall=5pt
+\_nulldelimiterspace=1.2pt
+\_scriptspace=0.5pt
+\_maxdepth=4pt
+\_splitmaxdepth=\_maxdimen
+\_boxmaxdepth=\_maxdimen
+\_parskip=0pt plus 1pt
+\_abovedisplayskip=12pt plus 3pt minus 9pt
+\_abovedisplayshortskip=0pt plus 3pt
+\_belowdisplayskip=12pt plus 3pt minus 9pt
+\_belowdisplayshortskip=7pt plus 3pt minus 4pt
+\_parfillskip=0pt plus 1fil
+\_thinmuskip=3mu
+\_medmuskip=4mu plus 2mu minus 4mu
+\_thickmuskip=5mu plus 5mu
+
+   \_doc -----------------------------
+   Note that `\topskip` and `\splittopskip` are changed when first
+   `\typosize` sets the main values (default font size and default
+   `\baselineskip`).
+   \_cod -----------------------------
+
+\_topskip=10pt       % top edge of page-box to first baseline distance
+\_splittopskip=10pt
+
+   \_doc -----------------------------
+   \secc Plain \TeX/ registers
+   Declared registers used in plain \TeX/
+   \_cod -----------------------------
+
+% We also define special registers that function like parameters:
+\_newskip\_smallskipamount \_smallskipamount=3pt plus 1pt minus 1pt
+\_newskip\_medskipamount \_medskipamount=6pt plus 2pt minus 2pt
+\_newskip\_bigskipamount \_bigskipamount=12pt plus 4pt minus 4pt
+\_newskip\_normalbaselineskip \_normalbaselineskip=12pt
+\_newskip\_normallineskip \_normallineskip=1pt
+\_newdimen\_normallineskiplimit \_normallineskiplimit=0pt
+\_newdimen\_jot \_jot=3pt
+\_newcount\_interdisplaylinepenalty \_interdisplaylinepenalty=100
+\_newcount\_interfootnotelinepenalty \_interfootnotelinepenalty=100
+
+\_def\_normalbaselines{\_lineskip=\_normallineskip
+  \_baselineskip=\_normalbaselineskip \_lineskiplimit=\_normallineskiplimit}
+
+\_def\_frenchspacing{\_sfcode`\.=1000 \_sfcode`\?=1000 \_sfcode`\!=1000
+  \_sfcode`\:=1000 \_sfcode`\;=1000 \_sfcode`\,=1000 }
+\_def\_nonfrenchspacing{\_sfcode`\.=3000 \_sfcode`\?=3000 \_sfcode`\!=3000
+  \_sfcode`\:=2000 \_sfcode`\;=1500 \_sfcode`\,=1250 }
+
+\_public \normalbaselines \frenchspacing \nonfrenchspacing
+   \smallskipamount \medskipamount \bigskipamount
+   \normalbaselineskip \normallineskip \normallineskiplimit
+   \jot \interdisplaylinepenalty \interfootnotelinepenalty ;
+
+   \_doc -----------------------------
+   \secc Different settings than in plain \TeX/
+
+   Default \"baseline setting" is for 10\,pt fonts (like in plain \TeX/).
+   But `\typosize` and `\typoscale` macros re-declare it if another font size is used.
+
+   The \`\nonfrenchspacing` is not set by default because
+   the author of \OpTeX/ is living in Europe.
+   If you set `\enlang` hyphenation patterns then `\nonfrenchspacing`
+   is set.
+   \_cod -----------------------------
+
+\_normalbaselines % baseline setting, 10 pt font size
+
+   \_doc -----------------------------
+   Different values than in plain \TeX/ have the following primitive registers.
+   We prohibit orphans, set more information for tracing boxes, set page origin
+   to the upper left corner of the paper (no at 1\,in, 1\,in coordinates)
+   and set default page dimensions as A4, no letter.
+   \_cod -----------------------------
+
+\_emergencystretch=20pt % we want to use third pass of paragraph building algoritmh
+                        % we need not keep the compatibility with old documents
+
+\_clubpenalty=10000    % after first line of paragraph
+\_widowpenalty=10000   % before last line of paragraph
+
+\_showboxbreadth=150   % for tracing boxes
+\_showboxdepth=7
+\_errorcontextlines=15
+\_tracinglostchars=2   % missing chracter warnings on terminal too
+
+\_outputmode=1   % PDF ouput
+\_pdfvorigin=0pt % orgin is exatly at left upper corner
+\_pdfhorigin=0pt
+\_hoffset=25mm   % margins are 2.5cm, no 1in
+\_voffset=25mm
+\_hsize=160mm    % 210mm (from A4 size) - 2*25mm (default margins)
+\_vsize=244mm    % 297mm (from A4 size) - 2*25mm (default margins) -3mm baseline correction
+\_pagewidth=210 true mm
+\_pageheight=297 true mm
+
+   \_doc -----------------------------
+   If you insist on plain \TeX/ values of these parameters then you can
+   call the `\plaintexsetting` macro.
+   \_cod -----------------------------
+
+\_def\_plaintexsetting{%
+   \_emergencystretch=0pt
+   \_clubpenalty=150
+   \_widowpenalty=150
+   \_pdfvorigin=1in
+   \_pdfhorigin=1in
+   \_hoffset=0pt
+   \_voffset=0pt
+   \_hsize=6.5in
+   \_vsize=8.9in
+   \_pagewidth=8.5 true in
+   \_pageheight=11 true in
+   \_nonfrenchspacing
+}
+\_public \plaintexsetting ;
+
+   \_doc -----------------------------
+   \secc[oparams] \OpTeX/ parameters
+
+   The main principle of how to configure \OpTeX/ is not to use only parameters.
+   A designer can copy macros from \OpTeX/ and re-define them as required.
+   This is a reason why we don't implement dozens of parameters,
+   but we keep \OpTeX/ macros relatively simple. Example: do you want
+   another design of section titles? Copy macros `\_printsec` and
+   `\_printsecc` from `sections.opm` file to your macro file and re-define them.
+
+   Notice for OPmac users: there is an important difference: all "string-like"
+   parameters are token lists in \OpTeX/ (OPmac uses macros for them). The reason of
+   this difference: if a user sets parameter by unprefixed (public) control sequence,
+   an \OpTeX/ macro can read {\em the same data} using a prefixed (private) control sequence.
+
+   The \`\picdir` tokens list can include a directory where image files
+   (loaded by `\inspic`) are saved. Empty `\picdir` (default value) means
+   that image files are in the current directory (or somewhere in the \TeX/
+   system where \LuaTeX/ can find them). If you set a non-empty value to
+   the `\picdir`, then it must end by `/` character, for example
+   `\picdir={img/}` means that there exists a directory `img` in your
+   current directory and the image files are stored here.
+   \_cod -----------------------------
+
+\_newtoks\_picdir
+\_public \picdir ;
+
+   \_doc -----------------------------
+   You can control the dimensions of included images by
+   the parameters \`\picwidth` (which is equivalent to \`\picw`) and
+   \`\picheight`. By default these parameters are set to zero: the native
+   dimension of the image is used. If only `\picwidth` has a nonzero value,
+   then this is the width of the image (height is calculated automatically in
+   order to respect the aspect of the image). If only `\picheight` has
+   a nonzero value then the height is given, the width is calculated. If both
+   parameters are non-zero, the height and width are given and the aspect
+   ratio of the image is (probably) broken. We recommend setting these
+   parameters locally in the group where \^`\inspic` is used in order to not
+   influence the dimensions of other images. But there exist many
+   situations you need to put the same dimensions to more images,
+   so you can set this parameter only once before more \^`\inspic` macros.
+   \_cod -----------------------------
+
+\_newdimen\_picwidth   \_picwidth=0pt   \_let\picw=\_picwidth
+\_newdimen\_picheight  \_picheight=0pt
+\_public \picwidth \picheight ;
+
+   \_doc -----------------------------
+   The \`\everytt` is the token list used in
+   \^`\begtt`...\^`\endtt` environment and
+   in the verbatim group opened by \^`\verbinput` macro. You can include a
+   code which is processed inside the group after basic settings were done
+   On the other hand, it is processed before the scanner of verbatim text is started.
+   Your macros should influence scanner (catcode settings) or printing
+   process of the verbatim code or both.
+
+   The code from the line immediately after \^`\begtt` is processed after
+   the \^`\everytt`. This code should overwrite \^`\everytt` settings. Use
+   \^`\everytt` for all verbatim environments in your document and use a code
+   after \^`\begtt` locally only for this environment.
+
+   The \`\everyintt` token list does similar work
+   but acts in the in-line verbatim
+   text processed by a pair of \^`\verbchar` characters or by \^`\code``{<text>}`.
+   You can set `\everyintt={\Red}` for example if you want in-line verbatim
+   in red color.
+   \_cod -----------------------------
+
+\_newtoks\_everytt
+\_newtoks\_everyintt
+\_public \everytt \everyintt ;
+
+   \_doc -----------------------------
+   The \`\ttline` is used
+   in \^`\begtt`...\^`\endtt` environment or in the code
+   printed by \^`\verbinput`. If `\ttline` is positive or zero, then the
+   verbatim code has numbered lines from `\ttline+1`. The `\ttline`
+   register is re-set to a new value after a code piece is printed, so next
+   code pieces have numbered lines continuously. If `\ttline=-1`, then
+   \^`\begtt`...\^`\endtt` lines are without numbers and \^`\verbinput` lines
+   show the line numbers of inputted file. If `\ttline`\code{<-1}
+   then no line numbers are printed.
+   \_cod -----------------------------
+
+\_newcount\_ttline    \_ttline=-1  % last line number in \begtt...\endtt
+\_public \ttline ;
+
+   \_doc -----------------------------
+   The \`\ttindent` gives default indentation
+   of verbatim lines printed by \^`\begtt`...\^`\endtt` pair or by
+   \^`\verbinput`.
+   \nl
+   The \`\ttshift` gives the amount of shift of all verbatim lines to the right.
+   Despite the \^`\ttindent`, it does not shift the line numbers, only
+   the text.
+   \nl
+   The \`\iindent` gives default indentations used in the table of contents,
+   captions, lists, bib references,
+   \nl
+   It is strongly recommended to re-set this value if you set `\parindent`
+   to another value than plain \TeX/ default 20pt. A well-typeset
+   document should have the same dimension for all indentations, so
+   you should say `\ttindent=\parindent` and `\iindent=\parindent`.
+   \_cod -----------------------------
+
+\_newdimen\_ttindent \_ttindent=\_parindent % indentation in verbatim
+\_newdimen\_ttshift
+\_newdimen\_iindent  \_iindent=\_parindent
+\_public \ttindent \ttshift \iindent ;
+
+   \_doc -----------------------------
+   The tabulator `^^I` has its category code like space: it behaves as a
+   space in normal text. This is a common plain \TeX/ setting.
+   But in the multiline verbatim environment it
+   is active and expands to the `\hskip<dimen>` where `<dimen>`
+   is the width of \`\tabspaces` spaces.
+   Default `\tabspaces=3` means
+   that tabulator behaves like three spaces in multiline verbatim.
+   \_cod -----------------------------
+
+\_newcount \_tabspaces   \_tabspaces=3
+\_public \tabspaces ;
+
+   \_doc -----------------------------
+   If \`\hicolors` is non-empty then its contents is used instead
+   `\_hicolors<name>` declared in the file `hisyntax-<name>.opm`.
+   The user can give his/her preferences about colors for
+   syntax highlighting by this tokens list.
+   The full color set must be declared here.
+   \_cod -----------------------------
+
+\_newtoks\_hicolors
+\_public \hicolors ;
+
+   \_doc -----------------------------
+   The default item mark used between \^`\begitems` and \^`\enditems` is the bullet.
+   The \`\defaultitem` tokens list declares this default item mark.
+   \nl
+   The \`\everyitem` tokens list is applied in vertical mode
+   at the start of each item.
+   \nl
+   The \`\everylist` tokens list is applied after the group is opened by \^`\begitems`
+   \nl
+   The \`\ilevel` keeps the value of the current nesting level of the items list.
+   \nl
+   The \`\listskipamount` gives vertical skip above and below the items list
+   if `\ilevel=1`.
+   \_cod -----------------------------
+
+\_newtoks\_defaultitem  \_defaultitem={$\_bullet$\_enspace}
+\_newtoks\_everyitem
+\_newtoks\_everylist
+\_newskip \_listskipamount  \_listskipamount=\_medskipamount
+\_newcount \_ilevel
+\_public \defaultitem \everyitem \everylist \listskipamount \ilevel ;
+
+   \_doc -----------------------------
+   The \^`\tit` macro includes `\vglue`\`\titskip` above the title of the document.
+   \_cod -----------------------------
+
+\_newskip\_titskip   \_titskip=40pt \_relax  % \vglue above title printed by \tit
+\_public \titskip ;
+
+   \_doc ----------------------------
+   The \^`\begmulti` and \^`\endmulti` pair creates more columns. The parameter
+   \`\colsep` declares the space between columns. If $n$ columns are specified
+   then we have $n-1$ `\colseps` and $n$ columns in total `\hsize`. This
+   gives the definite result of the width of the columns.
+   \_cod ----------------------------
+
+\_newdimen\_colsep \_colsep=20pt  % space between columns
+\_public \colsep ;
+
+   \_doc -----------------------------
+   Each line in the Table of contents is printed in a group.
+   The \`\everytocline` tokens list is processed here before
+   the internal `\_tocl:<num>` macro which starts printing the line.
+   \_cod -----------------------------
+
+\_newtoks \_everytocline
+\_public \everytocline ;
+
+   \_doc -----------------------------
+   The \`\bibtexhook` tokens list is used inside the group when `\usebib` command is
+   processed after style file is loaded and before printing bib-entries.
+   You can re-define a behavior of the style file here or you can modify the
+   more declaration for printing (fonts, baselineskip, etc.) or you can
+   define specific macros used in your `.bib` file.
+   \_cod -----------------------------
+
+\_newtoks\_bibtexhook
+\_public \bibtexhook ;
+
+   \_doc -----------------------------
+   \`\everycapitonf` is used before printing caption in figures and
+   \`\everycapitont` is used before printing caption in tables.
+   \_cod -----------------------------
+
+\_newtoks\_everycaptiont  \_newtoks\_everycaptionf
+\_public \everycaptiont \everycaptionf ;
+
+   \_doc -----------------------------
+   The \`\everyii` tokens list is used before `\noindent` for each
+   Index item when printing the Index.
+   \_cod -----------------------------
+
+\_newtoks\_everyii
+\_public \everyii ;
+
+   \_doc -----------------------------
+   The \`\everymnote` is used in the \^`\mnote` group before `\noindent` which
+   immediately precedes marginal note text.
+   \nl
+   The \`\mnotesize` is the horizontal size of the marginal notes.
+   \nl
+   The \`\mnoteindent` is horizontal space between body-text and marginal note.
+   \_cod -----------------------------
+
+\_newtoks\_everymnote
+\_newdimen\_mnotesize   \_mnotesize=20mm   % the width of the mnote paragraph
+\_newdimen\_mnoteindent \_mnoteindent=10pt % ditance between mnote and text
+\_public \everymnote \mnotesize \mnoteindent ;
+
+   \_doc -----------------------------
+   The \^`\table` parameters follow. The \`\thistable` tokens list
+   register should be used for giving an exception for only one `\table`
+   which follows. It should change locally other parameters of the `\table`.
+   It is reset to an empty list after the table is printed.
+   \nl
+   The \`\everytable` tokens list register is applied in every table.
+   There is another difference between these two registers.
+   The 	`\thistable` is used first, then strut and baselineskip settings are
+   done, then `\everytable` is applied and then the table is printed.
+   \nl
+   \`\tabstrut` configures the height and depth of lines in the table.
+   You can declare `\tabstrut={}`, then normal baselineskip is used in the
+   table. This can be used when you don't use horizontal nor vertical
+   lines in tables.
+   \nl
+   \`\tabiteml` is applied before each item,
+   \`\tabitemr` is applied after each item of the table.
+   \nl
+   \`\tablinespace` is additional vertical space between horizontal rules
+   and the lines of the table.
+   \nl
+   \`\hhkern` gives the space between horizontal lines if they are doubled and
+   \`\vvkern` gives the space between such vertical lines.
+   \nl
+   \`\tabskipl` is `\tabskip` used before first column,
+   \`\tabskipr` is `\tabskip` used after the last column.
+   \nl
+   \`\tsize` is virtual unit of the width of paragraph-like table items when
+   `\table pxto<size>` is used.
+   \_cod -----------------------------
+
+\_newtoks\_everytable \_newtoks\_thistable
+\_newtoks\_tabiteml \_newtoks\_tabitemr \_newtoks\_tabstrut
+\_newdimen\_tablinespace \_newdimen\_vvkern \_newdimen\_hhkern \_newdimen\_tsize
+\_newskip\_tabskipl  \_newskip\_tabskipr
+\_everytable={}        % code used after settings in \vbox before table processing
+\_thistable={}         % code used when \vbox starts, is is removed after using it
+\_tabstrut={\_strut}
+\_tabiteml={\_enspace} % left material in each column
+\_tabitemr={\_enspace} % right material in each column
+\_tablinespace=2pt     % additional vertical space before/after horizontal rules
+\_vvkern=1pt           % space between double vertical line and used in \frame
+\_hhkern=1pt           % space between double horizontal line and used in \frame
+\_tabskipl=0pt\_relax  % \tabskip used before first column
+\_tabskipr=0pt\_relax  % \tabskip used after the last column
+\_public \everytable \thistable \tabiteml \tabitemr \tabstrut \tablinespace
+         \vvkern \hhkern \tsize \tabskipl \tabskipr ;
+
+   \_doc -----------------------------
+   The \^`\eqalign` macro can be configured by \`\eqlines` and \`\eqstyle`
+   tokens lists. The default values are set in order these macro beahaves
+   as in Plain \TeX. The \`\eqspace` is horizontal space put
+   between equation systems if more columns in \^`\eqalign` are used.
+   \_cod -----------------------------
+
+\_newtoks  \_eqlines  \_eqlines={\_openup\_jot}
+\_newtoks  \_eqstyle  \_eqstyle={\_strut\_displaystyle}
+\_newdimen \_eqspace  \_eqspace=20pt
+\_public \eqlines \eqstyle \eqspace ;
+
+   \_doc -----------------------------
+   \`\lmfil` is \"left matrix filler" (for `\matrix` columns). The default
+   value does centering because the right matrix filler is directly set to `\hfil`.
+   \_cod -----------------------------
+
+\_newtoks \_lmfil   \_lmfil={\_hfil}
+\_public \lmfil ;
+
+   \_doc -----------------------------
+   The output routine uses token list \`\headline` and \`\footline` in the
+   same sense as in plain \TeX/. If they are non-empty then `\hfil` or `\hss`
+   must be here because they are used inside `\hbox to\hsize`.
+
+   Assume that page-body text can be typeset in different sizes and
+   different fonts and we don't know in what font context the output routine
+   is invoked. So, it is strongly recommended to declare fixed variants of
+   fonts at the beginning of your document. For example `\fontdef\rmfixed{\rm}`,
+   `\fontdef\itfixed{\it}`. Then use them in headline and footline:
+   \begtt
+   \headline={\itfixed Text of headline, section: \fistmark \hss}
+   \footline={\rmfixed \ifodd\pageno \hfill\fi \folio \hfil}
+   \endtt
+   \_cod -----------------------------
+
+\_newtoks\_headline   \_headline={}
+\_newtoks\_footline   \_footline={\_hss\_rmfixed \_folio \_hss}
+\_public \headline \footline ;
+
+   \_doc -----------------------------
+   The distance between the `\headline` and the top of the page text
+   is controlled by the \`\headlinedist` register.
+   The distance between the bottom of
+   page-text and `\footline` is \`\footlinedist`.
+   More precisely: baseline of
+   headline and baseline of the first line in page-text have distance
+   `\headlinedist+\topskip`. The baseline of the last line in page-text and
+   the baseline of the footline have distance `\footlinedist`.
+   Default values are inspired by plain \TeX/.
+   \_cod -----------------------------
+
+\_newdimen \_headlinedist  \_headlinedist=14pt
+\_newdimen \_footlinedist  \_footlinedist=24pt
+\_public \headlinedist \footlinedist ;
+
+   \_doc -----------------------------
+   The \`\pgbottomskip` is inserted to the page bottom
+   in the output routine. You can set less tolerance here than
+   `\raggedbotom` does. By default, no tolerance is given.
+   \_cod -----------------------------
+
+\_newskip \_pgbottomskip  \_pgbottomskip=0pt \_relax
+\_public \pgbottomskip ;
+
+   \_doc -----------------------------
+   The \`\nextpages` tokens list can include settings which will be used at
+   next pages. It is processed at the end of output routine with
+   `\globaldefs=1` prefix. The `\nextpages` is reset to empty after
+   processing. Example of usage:
+   \begtt
+   \headline={} \nexptages={\headline={\rmfixed \firstmark \hfil}}
+   \endtt
+   This example sets current page with empty headline, but next pages have
+   non-empty headlines.
+   \_cod -----------------------------
+
+\_newtoks \_nextpages
+\_public \nextpages ;
+
+   \_doc -----------------------------
+   The \`\pgbackground` token list can include macros which generate a
+   vertical list. It is used as page background. The top-left corner of such
+   `\vbox` is at the top-left corner of the paper. Example creates the
+   background of all pages yellow:
+   \begtt
+   \pgbackground={\Yellow \hrule height 0pt depth\pdfpageheight width\pdfpagewidth}
+   \endtt
+   \_cod -----------------------------
+
+\_newtoks \_pgbackground   \_pgbackground={} % for page background
+\_public \pgbackground  ;
+
+   \_doc -----------------------------
+   The parameters used in \^`\inoval` and \^`\incircle` macros
+   can be re-set by \`\ovalparams`, \`\circleparams` tokens lists.
+   The default values (documented in the user manual) are set in the macros.
+   \_cod -----------------------------
+
+\_newtoks \_ovalparams
+\_newtoks \_circleparams
+%\_ovalparams={\_roundness=2pt \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp
+%              \_shadow=N \_overlapmargins=N \_hhkern=0pt \_vvkern=0pt }
+%\_circleparams={\_ratio=1 \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp
+%                \_shadow=N \_overlapmargins=N \_hhkern=3pt \_vvkern=3pt}
+
+\_newdimen \_roundness    \_roundness=5mm % used in \clippingoval macro
+
+\_public \ovalparams \circleparams \roundness ;
+
+   \_doc -----------------------------
+   \OpTeX/ defines \"Standard \OpTeX/ markup language"%
+   \fnote{Will be developed in 2021.}
+   which lists selected commands from chapter~1 and gives their behavior when a
+   converter from \OpTeX/ document to HTML or Markdown or \LaTeX/ is used.
+   The structure-oriented commands are selected here, but the commands which
+   declare typographical appearance (page layout, dimensions, selected font
+   family) are omitted. More information for such a converter should be
+   given in \`\cnvinfo``{<data>}`.
+   \OpTeX/ simply ignores this but the converter can read its configuration
+   from here. For example, a user can write:
+   \begtt  \catcode`\<=13
+   \cnvinfo {type=html, <cnv-to-html-data>}
+   \cnvinfo {type=markdown, <cnv-to-markdown-data>}
+   \endtt
+   and the document can be processed by \OpTeX/ to create PDF, or by a
+   converter to create HTML, or by another converter to create Markdown.
+   \_cod -----------------------------
+
+\_let\cnvinfo=\_ignoreit
+
+
+\_endcode %----------------------------------------------------
+
+The behavior of document processing by \OpTeX/ is
+controlled by {\em parameters}. The parameters are
+\begitems
+* primitive registers used in build-in algorithms of \TeX/,
+* registers declared and used by \OpTeX/ macros.
+\enditems
+Both groups of registers have their type: number, dimension, skip, token
+list.
+
+The registers are represented by their names (control sequences). If the user
+re-defines this control sequence then the appropriate register exists
+steadily and build-in algorithms are using it without change. But user
+cannot access its value in this case. \OpTeX/ declares two control sequences
+for each register: prefixed (private) and unprefixed (public). \OpTeX/ macros use only
+prefixed variants of control sequences. The user should use the unprefixed variant
+with the same meaning and set or read the values of registers using the
+unprefixed variant. If the user re-defines the unprefixed control sequence of
+a register then \OpTeX/ macros still work without change.
+
+%There are only a few parameters declared by \OpTeX/ macros. All of them
+%are listed in this section. This is the desired feature of the \OpTeX/.
+%If you want to do more
+%changes which cannot be controlled by parameters listed here then you
+%can copy the appropriate \OpTeX/ macro to your macro file and you
+%can completely re-define it. The typical examples are `\_printsomething`
+%macros which declare the design of the document.
+
+\_endinput
+
+History:
+2020-04-04 ... \tabspaces added
+2020-04-03 ... \hicolors added
diff --git a/Master/texmf-dist/tex/optex/base/pdfuni-string.opm b/Master/texmf-dist/tex/optex/base/pdfuni-string.opm
new file mode 100644
index 00000000000..25781ddfb4f
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/pdfuni-string.opm
@@ -0,0 +1,127 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \pdfunidef {PDFunicode strings for outlines <2021-02-08>} % preloaded in format
+
+   \_doc -----------------------------
+   \`\_hexprint` is a command defined in Lua, that scans a number and expands
+   to its UTF-16 Big Endian encoded form for use in PDF hexadecimal strings.
+   \_cod -----------------------------
+
+\bgroup
+\_catcode`\%=12
+\_gdef\_hexprint{\_directlua{
+   local num = token.scan_int()
+   if num < 0x10000 then
+      tex.print(string.format("%04X", num))
+   else
+      num = num - 0x10000
+      local high = bit32.rshift(num, 10) + 0xD800
+      local low = bit32.band(num, 0x3FF) + 0xDC00
+      tex.print(string.format("%04X%04X", high, low))
+   end
+}}
+\egroup
+
+   \_doc -----------------------------
+   \`\pdfunidef``\macro{<text>}` does more things than only converting to hexadecimal PDF string.
+   The <text> can be scanned in verbatim mode (it is true becuase \^`\_Xtoc`
+   reads the <text> in verbatim mode). First `\edef` do
+   `\_scantextokens\unexpanded` and second `\edef` expands the parameter
+   according to current values on selected macros from `\_regoul`. Then
+   \`\_removeoutmath` converts `..$x^2$..` to `..x^2..`, i.e removes dollars.
+   Then \`\_removeoutbraces` converts `..{x}..` to `..x..`.
+   Finally, the <text> is detokenized, spaces are preprocessed using \^`\replstring`
+   and then the \`\_pdfunidefB` is repeated on each character. It calls the
+   `\directlua` chunk to print hexadecimal numbers in the macro \^`\_hexprint`.\nl
+   Characters for quotes (and separators for quotes) are activated by first
+   `\_scatextokens` and they are defined as the same non-active characters.
+   But `\_regoul` can change this definition.
+   \_cod -----------------------------
+
+\_def\_pdfunidef#1#2{%
+   \_begingroup
+      \_catcodetable\_optexcatcodes \_adef"{"}\_adef'{'}%
+      \_the\_regoul \_relax % \_regmacro alternatives of logos etc.
+      \_ifx\_savedttchar\_undefined \_def#1{\_scantextokens{\_unexpanded{#2}}}%
+      \_else \_lccode`\;=\_savedttchar \_lowercase{\_prepinverb#1;}{#2}\fi
+      \_edef#1{#1}%
+      \_escapechar=-1
+      \_edef#1{#1\_empty}%
+      \_escapechar=`\\
+      \_ea\_edef \_ea#1\_ea{\_ea\_removeoutmath   #1$\_end$}%  $x$ -> x
+      \_ea\_edef \_ea#1\_ea{\_ea\_removeoutbraces #1{\_end}}%  {x} -> x
+      \_edef#1{\_detokenize\_ea{#1}}%
+      \_replstring#1{ }{{ }}%  text text -> text{ }text
+      \_catcode`\\=12 \_let\\=\_bslash
+      \_edef\_out{<FEFF}
+      \_ea\_pdfunidefB#1^%  text -> \_out in octal
+      \_ea
+   \_endgroup
+   \_ea\_def\_ea#1\_ea{\_out>}
+}
+\_def\_pdfunidefB#1{%
+   \_ifx^#1\_else
+      \_edef\_out{\_out \_hexprint `#1}
+   \_ea\_pdfunidefB \_fi
+}
+
+\_def\_removeoutbraces #1#{#1\_removeoutbracesA}
+\_def\_removeoutbracesA #1{\_ifx\_end#1\_else #1\_ea\_removeoutbraces\_fi}
+\_def\_removeoutmath #1$#2${#1\_ifx\_end#2\_else #2\_ea\_removeoutmath\_fi}
+
+   \_doc -----------------------------
+   The \`\_prepinverb``<macro><separator>{<text>}`,
+   e.g.\ `\_prepinverb\tmpb|{aaa |bbb| cccc |dd| ee}`
+   does `\def\tmpb{<su>{aaa }bbb<su>{ cccc }dd<su>{ ee}}` where
+   <su> is `\scantextokens\unexpanded`. It means that in-line verbatim
+   are not argument of `\scantextoken`. First `\edef\tmpb` tokenizes again
+   the <text> but not the parts which were in the the in-line verbatim.
+   \_cod -----------------------------
+
+\_def\_prepinverb#1#2#3{\_def#1{}%
+   \_def\_dotmpb ##1#2##2{\_addto#1{\_scantextokens{\_unexpanded{##1}}}%
+      \_ifx\_end##2\_else\_ea\_dotmpbA\_ea##2\_fi}%
+   \_def\_dotmpbA ##1#2{\_addto#1{##1}\_dotmpb}%
+   \_dotmpb#3#2\_end
+}
+
+   \_doc -----------------------------
+   The \^`\regmacro` is used in order to sed the values of macros
+   `\em`, `\rm`, `\bf`, `\it`, `\bi`, `\tt`, `\/` and `~` to values usable in
+   PDF outlines.
+   \_cod -----------------------------
+
+\_regmacro {}{}{\_let\em=\_empty \_let\rm=\_empty \_let\bf=\_empty
+    \_let\it=\_empty \_let\bi=\_empty \_let\tt=\_empty \_let\/=\_empty
+    \_let~=\_space
+}
+\public \pdfunidef ;
+
+\_endcode % --------------------------------
+
+There are only two encodings for PDF strings (used in PDFoutlines, PDFinfo,
+etc.). The first one is PDFDocEncoding which is single-byte encoding, but it
+misses most international characters.
+
+The second encoding is Big Endian UTF-16 which is implemented in this file. It
+encodes a single character in either two or four bytes.
+This encoding is \TeX/-discomfortable because it looks like
+
+\begtt
+<FEFF 0043 0076 0069 010D 0065 006E 00ED 0020 006A 0065 0020 007A 00E1 0074
+011B 017E 0020 0061 0020 0078 2208 D835DD44>
+\endtt
+
+This example shows a hexadecimal PDF string (enclosed in \code{<>} as opposed
+to the literal PDF string enclosed in `()`). In these strings each byte is
+represented by two hexadecimal characters (`0-9`, `A-F`). You can tell the
+encoding is UTF-16BE, becuase it starts with \"Byte order mark" `FEFF`. Each
+unicode character is then encoded in one or two byte pairs. The example string
+corresponds to the text \"Cvičení je zátěž a ${\rm x} ∈ 𝕄$". Notice the 4 bytes
+for the last character, $𝕄$. (Even the whitespace would be OK in a PDF file,
+because it should be ignored by PDF viewers, but \LuaTeX\ doesn't allow it.)
+
+\_endinput
+
+2021-02-08 \_octalprint -> \_hexprint
+2020-03-12 Released
diff --git a/Master/texmf-dist/tex/optex/base/plain-macros.opm b/Master/texmf-dist/tex/optex/base/plain-macros.opm
new file mode 100644
index 00000000000..b4569ee9691
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/plain-macros.opm
@@ -0,0 +1,346 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \magstep {Macros from plain TeX <2020-02-14>} % preloaded in format
+
+   \_doc -----------------------------
+   The \`\dospecials` works like in plain TeX but does nothing with `_`.
+   If you need to do the same with this character, you can re-define:
+   \begtt
+   \addto \dospecials{\do\_}
+   \endtt
+   \_cod -----------------------------
+
+\_def\_dospecials {\do\ \do\\\do\{\do\}\do\$\do\&%
+  \do\#\do\^\do\^^K\do\^^A\do\%\do\~}
+\_chardef\_active = 13
+
+\_public \dospecials \active ;
+
+   \_doc -----------------------------
+   The shortcuts `\chardef\@one` is not defined in \OpTeX/. Use normal
+   numbers instead of such obscurities.
+   \nl
+   The \`\magstep` and \`\magstephalf` are
+   defined with `\space`, (no `\relax`), in order to be expandable.
+   \_cod -----------------------------
+
+\_def \_magstephalf{1095 }
+\_def \_magstep#1{\_ifcase#1 1000\_or 1200\_or 1440\_or 1728\_or 2074\_or 2488\_fi\_space}
+\_public \magstephalf \magstep ;
+
+   \_doc -----------------------------
+   Plain \TeX/ basic macros and control sequences.
+   \`\endgraf`, \`\endline`.
+   The `^^L` is not defined in \OpTeX/ because it is obsolete.
+   \_cod -----------------------------
+
+\_def\^^M{\ } % control <return> = control <space>
+\_def\^^I{\ } % same for <tab>
+
+\_def\lq{`} \def\rq{'}
+\_def\lbrack{[} \_def\rbrack{]} % They are only public versions.
+% \catcode`\^^L=\active \outer\def^^L{\par} % ascii form-feed is "\outer\par" % obsolete
+
+\_let\_endgraf=\_par \_let\_endline=\_cr
+\_public \endgraf \endline ;
+
+   \_doc -----------------------------
+   Plain \TeX/ classical \`\obeylines` and \`\obeyspaces`.
+   \_cod -----------------------------
+
+% In \obeylines, we say `\let^^M=\par' instead of `\def^^M{\par}'
+% since this allows, for example, `\let\par=\cr \obeylines \halign{...'
+{\_catcode`\^^M=13 % these lines must end with %
+  \_gdef\_obeylines{\_catcode`\^^M=13\_let^^M\_par}%
+  \_global\_let^^M=\par} % this is in case ^^M appears in a \write
+\_def\_obeyspaces{\_catcode`\ =13 }
+{\_obeyspaces\_global\_let =\_space}
+\_public \obeylines \obeyspaces ;
+
+   \_doc -----------------------------
+   Spaces.
+   \`\thinspace`, \`\negthinspace`, \`\enspace`, \`\enskip`,
+   \`\quad`, \`\qquad`, \`\smallskip`,
+   \`\medskip`, \`\bigskip`, \`\nointerlineskip`, \`\offinterlineskip`,
+   \`\topglue`, \`\vglue`, \`\hglue`, \`\slash`.
+   \_cod -----------------------------
+
+\_protected\_def\_thinspace {\_kern .16667em }
+\_protected\_def\_negthinspace {\_kern-.16667em }
+\_protected\_def\_enspace {\_kern.5em }
+\_protected\_def\_enskip {\_hskip.5em\_relax}
+\_protected\_def\_quad {\_hskip1em\_relax}
+\_protected\_def\_qquad {\_hskip2em\_relax}
+\_protected\_def\_smallskip {\_vskip\_smallskipamount}
+\_protected\_def\_medskip {\_vskip\_medskipamount}
+\_protected\_def\_bigskip {\_vskip\_bigskipamount}
+\_def\_nointerlineskip {\_prevdepth=-1000pt }
+\_def\_offinterlineskip {\_baselineskip=-1000pt \_lineskip=0pt \_lineskiplimit=\_maxdimen}
+
+\_public \thinspace \negthinspace \enspace \enskip \quad \qquad \smallskip
+   \medskip \bigskip \nointerlineskip \offinterlineskip ;
+
+\_def\_topglue {\_nointerlineskip\_vglue-\_topskip\_vglue} % for top of page
+\_def\_vglue {\_afterassignment\_vglA \_skip0=}
+\_def\_vglA {\_par \_dimen0=\_prevdepth \_hrule height0pt
+  \_nobreak\_vskip\_skip0 \_prevdepth=\_dimen0 }
+\_def\_hglue {\_afterassignment\_hglA \_skip0=}
+\_def\_hglA {\_leavevmode \_count255=\_spacefactor \_vrule width0pt
+  \_nobreak\_hskip\_skip0 \_spacefactor=\_count255 }
+\_protected\_def~{\_penalty10000 \ } % tie
+\_protected\_def\_slash {/\_penalty\_exhyphenpenalty} % a `/' that acts like a `-'
+
+\_public \topglue \vglue \hglue \slash ;
+
+   \_doc -----------------------------
+   Penalties macros:
+   \`\break`, \`\nobreak`, \`\allowbreak`, \`\filbreak`, \`\goodbreak`,
+   \`\eject`, \`\supereject`, \`\dosupereject`,
+   \`\removelastskip`, \`\smallbreak`, \`\medbreak`, \`\bigbreak`.
+   \_cod -----------------------------
+
+\_protected\_def \_break {\_penalty-10000 }
+\_protected\_def \_nobreak {\_penalty10000 }
+\_protected\_def \_allowbreak {\_penalty0 }
+\_protected\_def \_filbreak {\_par\_vfil\_penalty-200\_vfilneg}
+\_protected\_def \_goodbreak {\_par\_penalty-500 }
+\_protected\_def \_eject {\_par\_break}
+\_protected\_def \_supereject {\_par\_penalty-20000 }
+\_protected\_def \_dosupereject {\_ifnum \_insertpenalties>0 % something is being held over
+  \_line{}\_kern-\_topskip \_nobreak \_vfill \_supereject \_fi}
+\_def \_removelastskip {\_ifdim\_lastskip=\_zo \_else \_vskip-\_lastskip \_fi}
+\_def \_smallbreak {\_par\_ifdim\_lastskip<\_smallskipamount
+  \_removelastskip \_penalty-50 \_smallskip \_fi}
+\_def \_medbreak {\_par\_ifdim\_lastskip<\_medskipamount
+  \_removelastskip \_penalty-100 \_medskip \_fi}
+\_def \_bigbreak {\_par\_ifdim\_lastskip<\_bigskipamount
+  \_removelastskip \_penalty-200 \_bigskip \_fi}
+
+\_public \break \nobreak \allowbreak \filbreak \goodbreak \eject \supereject \dosupereject
+   \removelastskip \smallbreak \medbreak \bigbreak ;
+
+   \_doc -----------------------------
+   Boxes.
+   \`\line`, \`\leftline`, \`\rightline`, \`\centerline`, \`\rlap`, \`\llap`,
+   \`\underbar`.
+   \_cod -----------------------------
+
+\_def \_line {\_hbox to\_hsize}
+\_def \_leftline #1{\_line{#1\_hss}}
+\_def \_rightline #1{\_line{\_hss#1}}
+\_def \_centerline #1{\_line{\_hss#1\_hss}}
+\_def \_rlap #1{\_hbox to\_zo{#1\_hss}}
+\_def \_llap #1{\_hbox to\_zo{\_hss#1}}
+\_def\_underbar #1{$\_setbox0=\_hbox{#1}\_dp0=\_zo \_math \_underline{\_box0}$}
+
+\_public \line \leftline \rightline \centerline \rlap \llap \underbar ;
+
+   \_doc -----------------------------
+   The \`\strutbox` is declared as 10pt size dependent (like in plain \TeX), but
+   the macro `\_setbaselineskip` (from `fonts-opmac.opm`) redefines it.
+   \_cod -----------------------------
+
+\_newbox\_strutbox
+\_setbox\_strutbox=\_hbox{\_vrule height8.5pt depth3.5pt width0pt}
+\_def \_strut {\_relax\_ifmmode\_copy\_strutbox\_else\_unhcopy\_strutbox\_fi}
+
+\_public \strutbox \strut ;
+
+   \_doc -----------------------------
+   Alignment. \`\hidewidth` \`\ialign` \`\multispan`.
+   \_cod -----------------------------
+
+\_def \_hidewidth {\_hskip\_hideskip} % for alignment entries that can stick out
+\_def \_ialign{\_everycr={}\_tabskip=\_zoskip \_halign} % initialized \halign
+\_newcount\_mscount
+\_def \_multispan #1{\_omit \_mscount=#1\_relax
+   \_loop \_ifnum\_mscount>1 \_spanA \_repeat}
+\_def \_spanA {\_span\_omit \_advance\_mscount by-1 }
+
+\_public \hidewidth \ialign \multispan ;
+
+   \_doc -----------------------------
+   Tabbing macros are omitted because they are obsolete.
+   \nl
+   Indentation and others. \`\textindent`, \`\item`, \`\itemitem`,
+   \`\narrower`, \`\raggedright`, \`\ttraggedright`, \`\leavevmode`.
+   \_cod -----------------------------
+
+\_def \_hang {\_hangindent\_parindent}
+\_def \_textindent #1{\_indent\_llap{#1\_enspace}\_ignorespaces}
+\_def \_item {\_par\_hang\_textindent}
+\_def \_itemitem {\_par\_indent \_hangindent2\_parindent \_textindent}
+\_def \_narrower {\_advance\_leftskip\_parindent
+   \_advance\_rightskip\_parindent}
+\_def \_raggedright {\_rightskip=0pt plus2em
+   \_spaceskip=.3333em \_xspaceskip=.5em\_relax}
+\_def \_ttraggedright {\_tt \_rightskip=0pt plus2em\_relax} % for use with \tt only
+\_def \_leavevmode {\_unhbox\_voidbox} % begins a paragraph, if necessary
+
+\_public \hang \textindent \item \itemitem \narrower \raggedright \ttraggedright \leavevmode ;
+
+   \_doc -----------------------------
+   Few character codes are set for backward compatibility. But old obscurities
+   (from plain TeX) based on \`\mathhexbox`
+   are not supported -- an error message and recommendation
+   to directly using the desired character is implemented by the
+   \`\_usedirectly` macro).
+   The user can re-define these control sequences of course.
+   \_cod -----------------------------
+
+%\chardef\%=`\%
+\_let\% = \_pcent  % more natural, can be used in lua codes.
+\_chardef\&=`\&
+\_chardef\#=`\#
+\_chardef\$=`\$
+\_chardef\ss="FF
+\_chardef\ae="E6
+\_chardef\oe="F7
+\_chardef\o="F8
+\_chardef\AE="C6
+\_chardef\OE="D7
+\_chardef\O="D8
+\_chardef\i="11 \chardef\j="12 % dotless letters
+\_chardef\aa="E5
+\_chardef\AA="C5
+\_chardef\S="9F
+\_def\l{\_errmessage{\_usedirectly ł}}
+\_def\L{\_errmessage{\_usedirectly Ł}}
+%\def\_{\_ifmmode \kern.06em \vbox{\hrule width.3em}\else _\fi} % obsolete
+\_def\_{\_hbox{_}}
+\_def\dag{\_errmessage{\_usedirectly †}}
+\_def\ddag{\_errmessage{\_usedirectly ‡}}
+%\_def\copyright{\_errmessage{\_usedirectly ©}}
+\_def\copyright{©} % << example, what to do
+%\_def\Orb{\_mathhexbox20D} % obsolete (part of Copyright)
+%\_def\P{\_mathhexbox27B}   % obsolete
+
+\_def \_usedirectly #1{Load Unicoded font by \string\fontfam\space and use directly #1}
+\_def \_mathhexbox #1#2#3{\_leavevmode \_hbox{$\_math \_mathchar"#1#2#3$}}
+\_public \mathhexbox ;
+
+   \_doc -----------------------------
+   Accents.
+   The macros \`\ooalign`, \`\d`, \`\b`, \`\c`, \`\dots`,
+   are defined for backward compatibility.
+   \_cod -----------------------------
+
+\_def \_oalign #1{\_leavevmode\_vtop{\_baselineskip=\_zo \_lineskip=.25ex
+   \_ialign{##\_crcr#1\_crcr}}}
+\_def \_oalignA {\_lineskiplimit=\_zo \_oalign}
+\_def \_ooalign {\_lineskiplimit=-\_maxdimen \_oalign} % chars over each other
+\_def \_shiftx #1{\_dimen0=#1\_kern\_ea\_ignorept \_the\_fontdimen1\_font
+   \_dimen0 } % kern by #1 times the current slant
+\_def \_d #1{{\_oalignA{\_relax#1\_crcr\_hidewidth\_shiftx{-1ex}.\_hidewidth}}}
+\_def \_b #1{{\_oalignA{\_relax#1\_crcr\_hidewidth\_shiftx{-3ex}%
+   \_vbox to.2ex{\_hbox{\_char\_macron}\_vss}\_hidewidth}}}
+\_def \_c #1{{\_setbox0=\_hbox{#1}\_ifdim\_ht0=1ex\_accent\_cedilla #1%
+   \_else\_ooalign{\_unhbox0\_crcr\_hidewidth\_cedilla\_hidewidth}\_fi}}
+\_def\_dots{\_relax\_ifmmode\_ldots\_else$\_math\_ldots\_thinsk$\_fi}
+\_public \oalign \ooalign \d \b \c \dots ;
+
+   \_doc -----------------------------
+   The accent commands like `\v`, `\.`, `\H`, etc. are not defined. Use the
+   accented characters directly -- it is the best solution. But you can use the
+   macro \`\oldaccents` which defines accented macros.
+   \nl
+   Much more usable is to define these control sequences for other purposes.
+   \_cod -----------------------------
+
+\_def \_oldaccents {%
+   \_def\`##1{{\_accent\_tgrave  ##1}}%
+   \_def\'##1{{\_accent\_tacute  ##1}}%
+   \_def\v##1{{\_accent\_caron  ##1}}%
+   \_def\u##1{{\_accent\_tbreve  ##1}}%
+   \_def\=##1{{\_accent\_macron ##1}}%
+   \_def\^##1{{\_accent\_circumflex ##1}}%
+   \_def\.##1{{\_accent\_dotaccent ##1}}%
+   \_def\H##1{{\_accent\_hungarumlaut ##1}}%
+   \_def\~##1{{\_accent\_ttilde  ##1}}%
+   \_def\"##1{{\_accent\_dieresis ##1}}%
+   \_def\r##1{{\_accent\_ring   ##1}}%
+}
+\_public \oldaccents ;
+
+% ec-lmr encoding (will be changed after \fontfam macro):
+\_chardef\_tgrave=0
+\_chardef\_tacute=1
+\_chardef\_circumflex=2
+\_chardef\_ttilde=3
+\_chardef\_dieresis=4
+\_chardef\_hungarumlaut=5
+\_chardef\_ring=6
+\_chardef\_caron=7
+\_chardef\_tbreve=8
+\_chardef\_macron=9
+\_chardef\_dotaccent=10
+\_chardef\_cedilla=11
+
+\_def \_uniaccents {% accents with Unicode
+   \_chardef\_tgrave="0060
+   \_chardef\_tacute="00B4
+   \_chardef\_circumflex="005E
+   \_chardef\_ttilde="02DC
+   \_chardef\_dieresis="00A8
+   \_chardef\_hungarumlaut="02DD
+   \_chardef\_ring="02DA
+   \_chardef\_caron="02C7
+   \_chardef\_tbreve="02D8
+   \_chardef\_macron="00AF
+   \_chardef\_dotaccent="02D9
+   \_chardef\_cedilla="00B8
+   \_chardef\_ogonek="02DB
+   \_let \_uniaccents=\_relax
+}
+
+   \_doc -----------------------------
+   The plain \TeX/ macros
+   \`\hrulefill`, \`\dotfill`, \`\rightarrowfill`, \`\leftarrowfill`,
+   \`\downbracefill`, \`\upbracefill`.
+   The last four are used in non-Unicode variants of `\overrightarrow`,
+   `\overleftarrow`, `\overbrace` and `\underbrace` macros, see
+   section~\ref[math-macros].
+   \_cod -----------------------------
+
+\_def \_hrulefill {\_leaders\_hrule\_hfill}
+\_def \_dotfill {\_cleaders\_hbox{$\_math \_mkern1.5mu.\_mkern1.5mu$}\_hfill}
+\_def \_rightarrowfill {$\_math\_smash-\_mkern-7mu%
+  \_cleaders\_hbox{$\_mkern-2mu\_smash-\_mkern-2mu$}\_hfill
+  \_mkern-7mu\_mathord\_rightarrow$}
+\_def \_leftarrowfill {$\_math\_mathord\_leftarrow\_mkern-7mu%
+  \_cleaders\_hbox{$\_mkern-2mu\_smash-\_mkern-2mu$}\_hfill
+  \_mkern-7mu\_smash-$}
+
+\_mathchardef \_braceld="37A \_mathchardef \_bracerd="37B
+\_mathchardef \_bracelu="37C \_mathchardef \_braceru="37D
+\_def \_downbracefill {$\_math \_setbox0=\_hbox{$\_braceld$}%
+  \_braceld \_leaders\_vrule height\_ht0 depth\_zo \_hfill \_braceru
+  \_bracelu \_leaders\_vrule height\_ht0 depth\_zo \_hfill \_bracerd$}
+\_def \_upbracefill {$\_math \_setbox0=\_hbox{$\_braceld$}%
+  \_bracelu \_leaders\_vrule height\_ht0 depth\_zo \_hfill \_bracerd
+  \_braceld \_leaders\_vrule height\_ht0 depth\_zo \_hfill \_braceru$}
+
+\_public \hrulefill \dotfill
+   \rightarrowfill \leftarrowfill \downbracefill \upbracefill ;
+
+   \_doc -----------------------------
+   The last part of plain \TeX/ macros: \`\magnification`, \`\bye`.
+   Note that math macros are defined in the `math-macros.opm` file
+   (section~\ref[math-macros]).
+   \_cod -----------------------------
+
+\_def \_magnification {\_afterassignment \_magA \_count255 }
+\_def \_magA {\_mag=\_count255 \_truedimen\_hsize \_truedimen\_vsize
+  \_dimen\_footins=8truein
+}
+% only for backward compatibility, but \margins macro is preferred.
+\_public \magnification ;
+
+\_def \_showhyphens #1{\_setbox0=\_vbox{\_parfillskip=0pt \_hsize=\_maxdimen \_tenrm
+  \_pretolerance=-1 \tolerance=-1 \hbadness=0 \showboxdepth=0 \ #1}}
+
+\_def \_bye {\_par \_vfill \_supereject \_byehook \_end}
+\_public \bye ;
+
+\_endcode % -------------------------------------
+
diff --git a/Master/texmf-dist/tex/optex/base/prefixed.opm b/Master/texmf-dist/tex/optex/base/prefixed.opm
new file mode 100644
index 00000000000..61df791ddb0
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/prefixed.opm
@@ -0,0 +1,298 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \public {Prefixing and code syntax <2020-02-14>} % preloaded in format
+
+   \_doc ---------
+   All \TeX/ primitives have alternative control sequence `\_hbox` `\_string`, ...
+   \_cod ---------
+
+\let\_directlua = \directlua
+\_directlua {
+    % enable all TeX primitives with _ prefix
+    tex.enableprimitives('_', tex.extraprimitives('tex'))
+    % enable all primitives without prefixing
+    tex.enableprimitives('', tex.extraprimitives())
+    % enable all primitives with _ prefix
+    tex.enableprimitives('_', tex.extraprimitives())
+}
+
+   \_doc ------------------
+   \`\ea` is useful shortcut for `\expandafter`. We recommend to use always the
+   private form of \`\_ea`
+   because there is high probability that `\ea` will be redefined by the user.
+   \nl
+   \`\public` `<sequence> <sequence> ... ;` does
+   `\let \<sequence> = \_<sequence>` for all sequences.
+   \nl
+   \`\private` `<sequence> <sequence> ...;` does
+   `\let \_<sequence> = \<sequence>` for all sequences.
+   \nl
+   \`\xargs` `<what> <sequence> <sequence> ... ;`
+   does `<what><sequence>` for each sequences.
+   \_cod -----------------
+
+\_let\_ea =\_expandafter  % usefull shortcut
+
+\_long\_def \_xargs #1#2{\_ifx #2;\_else \_ea#1\_ea#2\_ea\_xargs \_ea #1\_fi}
+
+\_def \_pkglabel{}
+\_def \_public {\_xargs \_publicA}
+\_def \_publicA #1{\_ea\_let \_ea#1\_csname  _\_csstring #1\_endcsname}
+
+\_def \_private {\_xargs \_privateA}
+\_def \_privateA #1{\_ea\_let \_csname  _\_csstring #1\_endcsname =#1}
+
+\_public \public \private \xargs \ea ;
+
+   \_doc -----------------------
+   Each macro file should begin with \`\_codedecl` `\macro {<info>}`.
+   If the `\macro` is defined already then the `\endpinput` protects to read
+   such file more than once. Else the <info> is printed to the terminal
+   and the file is read.\nl
+   The {\`\_endcode`} is defined as `\endinput` in the `optex.ini` file.
+   \`\wterm` `{<text>}` prints `<text>`
+   to the terminal and to the `.log` file (as in plain \TeX/).
+   \_cod -----------------------
+
+\_def \_codedecl #1#2{%
+   \_ifx #1\_undefined \_wterm{#2}%
+   \_else \_ea \_endinput \_fi
+}
+\_def \_wterm {\_immediate \_write16 }
+
+\_public \wterm ;
+
+   \_doc ------------------------
+   The `\optexversion` and `\fmtname` are defined in the `optex.ini` file.
+   Maybe, somebody will need a private version of these macros.
+   \_cod ------------------------
+
+\_private \optexversion \fmtname ;
+
+   \_doc -----------------------------
+   The `\_mathsbon` and `\_mathsboff` are defined in `math-macros.opm` file.
+   Now, we define the macros
+   \`\_namespace` `{<pkg label>}`,  \`\_resetnamespace` `{<pkg label>}`, \`\_endnamespace`,
+   \`\_nspublic` and \`\_nsprivate`
+   for package writers, see section~\ref[pkg-namespace].{\hbadness=2200\par}
+   \_cod -----------------------------
+
+\_def \_pkglabel{}
+\_def\_namespace #1{%
+   \_ifcsname namesp:#1\_endcsname \_errmessage
+      {The name space "#1" is used already, it cannot be used twice}%
+      \_endinput
+   \_else \_resetnamespace{#1}\_fi
+}
+\_def\_resetnamespace #1{%
+   \_ea \_gdef \_csname namesp:#1\_endcsname {}%
+   \_gdef \_pkglabel{_#1}%
+   \_directlua{
+      callback.add_to_callback("process_input_buffer",
+        function (str)
+           return string.gsub(str, "\_nbb[.]([a-zA-Z])", "\_nbb _#1_\_pcent 1")
+        end, "_namespace")
+   }%
+}
+\_def\_endnamespace {%
+   \_directlua{ callback.remove_from_callback("process_input_buffer", "_namespace") }%
+   \_gdef \_pkglabel{}%
+}
+
+\_def \_nspublic {\_xargs \_nspublicA}
+\_def \_nspublicA #1{%
+   \_unless\_ifx #1\_undefined
+      \_opwarning{\_ea\_ignoreit\_pkglabel\_space redefines the meaning of \_string#1}\_fi
+   \_ea\_let \_ea#1\_csname \_pkglabel _\_csstring #1\_endcsname}
+
+\_def \_nsprivate {\_xargs \_nsprivateA}
+\_def \_nsprivateA #1{\_ea\_let \_csname \_pkglabel _\_csstring #1\_endcsname =#1}
+
+
+\_endcode %----------------------------------------------------
+
+
+\sec[prefixed] Concept of namespaces of control sequences
+
+\secc Prefixing internal control sequences
+
+All control sequences used in \OpTeX/ are used and defined with `_` prefix.
+The user can be sure that when he/she does `\def\foo` then internal macros of
+\OpTeX/ nor \TeX/ primitives will be not damaged. For example
+`\def\if{...}` will not damage macros because \OpTeX/'s macros
+are using `\_if` instead of `\if`.
+
+All \TeX/ primitives are initialized with two representative control
+sequences: `\word` and `\_word`, for example `\hbox` and `\_hbox`.
+The first alternative is reserved for users or such control sequences
+can be re-defined by a user.
+
+\OpTeX/ sets the character `_` as the letter, so it can be used in
+control sequences. When a control sequence begins with this character
+then it means that it is a primitive or it is used in \OpTeX/ macros as
+internal. User can redefine such prefixed control sequence only
+if he/she explicitly know what happens.
+
+We never change catcode of `_`, so internal macros can be
+redefined by user without problems if it is desired. We need not
+something like `\makealetter` from \LaTeX/.
+
+\OpTeX/ defines all new macros as prefixed. For public usage of such macros,
+we need to set non-prefixed version. This is done by
+
+\begtt \catcode`\<=13
+\public <list of control sequences> ;
+\endtt
+
+For example \^`\public`` \foo \bar ;` does `\let\foo=\_foo`, `\let\bar=\_bar`.
+
+At the end of each code segment in \OpTeX/, the `\_public` macro is used. You
+can see, what macros are defined for public usage in this code segment.
+
+The macro \^`\private` does a reverse job to `\public` with the same syntax.
+For example `\private \foo \bar ;` does `\let\_foo=\foo`, `\let\_bar=\bar`.
+This should be used when an unprefixed variant of a control sequence is declared
+already but we need the prefixed variant too.
+
+In this documentation: if both variants of a control sequence are declared
+(prefixed and unprefixed), then the accompanying text mentions only
+the unprefixed variant. The code typically defines the prefixed variant
+and then the \^`\public` (or `\_public`) macro is used.
+
+\secc Namespace of control sequences for users
+
+Users can define or declare any control sequence with a name without any `_`.
+This does not make any problem. Only one exception is the reserved control
+sequence `\par`. It is generated by tokenizer (at empty lines)
+and used as internal in \TeX/.
+
+User can define or declare control sequences with `_` character, for
+example `\my_control_sequence`, but with the following exceptions:
+
+\begitems
+* Control sequences which begin with `_` are reserved for \TeX/ primitives,
+  \OpTeX/ internal macros and packages internal macros.
+* Control sequences (terminated by non-letter) in the form
+  `\<word>_` or `\<word>_<one-letter>`, where
+  <word> is a sequence of letters, are inaccessible, because they
+  are interpreted as `\<word>` followed by `_` or as `\<word>` followed by
+  `_<one-letter>`. This is important for writing math, for example:
+\begtt  \adef-{_}
+  \int-a^b    ... is interpreted as \int _a^b
+  \max-M      ... is interpreted as \max _M
+  \alpha-{ij} ... is interpreted as \alpha _{ij}
+\endtt
+  This feature is implemented using lua code at input processor level, see
+  the section~\ref[math-macros] for more details. You can deactivate this feature by
+  \^`\mathsboff`. After this, you can still write
+  `$`$\int$`_a^b$` (Unicode) or `$\int _a^b$` % $∫_a^b$ (Unicode) or $\int _a^b$
+  without problems but `\int``_a^b` yields to undefined control sequence
+  `\int``_a`. You can activate this feature again by \^`\mathsbon`. The
+  effect will take shape from next line read from input file.
+* Control sequences in the form `\_<pkg>_<word>` is intended for package
+  writers as internal macros for a package with `<pkg>` identifier,
+  see section~\ref[pkg-namespace].
+\enditems
+
+The single-letter control sequences like `\%`, `\$`, `\^` etc. are not used
+in internal macros. Users can redefine them, but (of course) some classical
+features can be lost (printing percent character by `\%` for example).
+
+\secc Macro files syntax
+
+Each segment of \OpTeX/ macros is stored in one file with `.opm` extension
+(means OPtex Macros). Your local macros should be in a normal `*.tex` file.
+
+The code in macro files starts by \^`\_codedecl` and ends by \^`\_endcode`.
+The \^`\_endcode` is equivalent for `\endinput`, so documentation can follow.
+The \^`\_codedecl` has syntax:
+
+\begtt
+\_codedecl \sequence {Name <version>}
+\endtt
+
+If the mentioned `\sequence` is defined, then \^`\_codedecl` does the same as
+`\endinput`: this protects from reading the file twice. We suppose, that
+`\sequence` is defined in the macro file.
+
+It is possible to use the \^`\_doc` ... \^`\_cod` pair between the macro lines.
+The documentation text should be here. It is ignored when macros are read
+but it can be printed using `doc.opm` macros like in this documentation.
+
+
+\secc[pkg-namespace] Name spaces for package writers
+
+Package writer should use internal names in the form `\_<pgk>_<sequence>`,
+where `<pkg>` is a package label. For example:
+`\_qr_utfstring` from `qrcode.opm` package.
+
+The package writer needs not to write repeatedly `\_pkg_foo` `\_pkg_bar`
+etc.\ again and again in the macro file.\fnote
+{We have not adopted the idea from expl3 language:)}
+When the \^`\_namespace` `{<pkg>}`
+is declared at the beginning of the macro file then all occurrences of
+`\.foo` will be replaced by `\_<pkg>_foo` at the input processor level.
+The macro writer can write (and backward can read his/her code) simply with
+`\.foo`, `\.bar` control sequences and `\_<pkg>_foo`, `\_<pkg>_bar`
+control sequences are processed internally.
+The scope of the \^`\_namespace` command ends at the \^`\_endnamespace` command
+or when another \^`\_namespace` is used. This command checks
+if the same package label is not declared by the \^`\_namespace` twice.
+
+The \^`\_nspublic` macro does `\let\foo = \_<pkg>_foo` when
+\^`\_namespace{<pkg>}` is declared. Moreover, it prints a warning if `\foo` is
+defined already. The \^`\_nsprivate` macro does reverse
+operation to it without warnings. Example: you can define `\def\.macro{...}` and then
+set it to the user name space by `\_nspublic \macro;`.
+
+Don't load other packages (which are using their own namespace) inside your
+namespace. Do load them before your \^`\_namespace`~`{<pkg>}` is
+initialized. Or close your namespace by \^`\_endnamespace` and open it again
+(after other packages are loaded) by \^`\_resetnamespace`~`{<pkg>}`.
+
+If the package writer needs to declare a control
+sequence by \^`\newif`, then there is an exception of the rule described above. Use
+\^`\_newifi\_if<pkg>_bar`, for example `\_newifi\_ifqr_incorner`.
+Then the control sequences `\_qr_incornertrue` and
+`\_qr_incornerfalse` can be used (or the sequences `\.incornertrue`
+and `\.incornerfalse` when `\_namespace{qr}` is used).
+
+
+\secc Summary about rules for external macro files published for \OpTeX/
+
+If you are writing a macro file that is intended to be published for
+\OpTeX/, then you are greatly welcome. You should follow these rules:
+
+\begitems
+* Don't use control sequences from the user namespace in the macro
+  bodies if there is not explicit and documented reason to do this.
+* Don't declare control sequences in the user namespace if there are not
+  explicit and documented reasons to do this.
+* Use control sequences from \OpTeX/ and primitive namespace
+  in read-only mode, if there is not an explicit and documented reason to
+  redefine them.
+* Use `\_<pkg>_<name>` for your internal macros or `\.<name>` if the
+  \^`\_namespace{<pkg>}` is declared. See section~\ref[pkg-namespace].
+* Use \^`\load` (or better: `\_load`) for loading more external macros
+  if you need them. Don't use `\_input` explicitly in such cases.
+  The reason is: the external macro file is not loaded
+  twice if another macro or the user needs it explicitly too.
+* Use \^`\_codedecl` as your first command in the macro file and
+  \^`\_endcode` to close the text of macros.
+* Use \^`\_doc` ... \^`\_cod` pairs for documenting the code pieces and/or write
+  more documentation after the \^`\_endcode` command.
+\enditems
+
+If the macro file accepts these recommendations then it should be
+named by `<filename>.opm` where `<filename>` differs from file names
+used directly in \OpTeX/ and from other published macros.
+This extension `opm` has precedence before `.tex` when
+the \^`\load` macro is used.
+
+The `qrcode.opm` is the first example of how an external macro file for \OpTeX/
+can look like.
+
+\endinput
+
+2021-02-15 \_expandafter -> \_ea in \_codedecl
+2020-02-14 released
diff --git a/Master/texmf-dist/tex/optex/base/print-unimath.opm b/Master/texmf-dist/tex/optex/base/print-unimath.opm
new file mode 100644
index 00000000000..2b1a07f30ab
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/print-unimath.opm
@@ -0,0 +1,56 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_undefined {Printing Unicode-math table \string<2020-06-08>}
+
+\_begingroup
+   \_def\UnicodeMathSymbol#1#2#3#4{%
+      \_ifnum#1>"10000 \_endinput \_else \_printmathsymbol{#1}{#2}{#3}{#4}\_fi
+   }
+   \_def\UnicodeMathSymbolA#1#2#3#4{%
+      \_ifnum#1>"10000 \_printmathsymbol{#1}{#2}{#3}{#4}\_fi
+   }
+   \_def\_printmathsymbol#1#2#3#4{%
+      \_hbox{\_hbox to2em{$#2{}$\_hss}\_hbox to3em
+          {\small\_printop#3\_hss}{\_tt\_string#2\_trycs{_eq:\_string#2}{}}}
+   }
+   \_def\_eq#1#2{\_sdef{_eq:\_string#2}{=\_string#1}}
+   \_eq \diamond\smwhtdiamond \_eq \bullet\smblkcircle \_eq \circ\vysmwhtcircle
+   \_eq \bigcirc\mdlgwhtcircle \_eq \to\rightarrow \_eq \le\leq
+   \_eq \ge\geq \_eq \neq\ne \_eq \emptyset\varnothing \_eq \hbar\hslash
+   \_eq \land\wedge \_eq \lor\vee \_eq \owns\ni \_eq \gets\leftarrow
+   \_eq \mathring\ocirc \_eq \lnot\neg \_eq \backepsilon\upbackepsilon
+   \_eq \eth\matheth \_eq \dbkarow\dbkarrow \_eq \drbkarow\drbkarrow
+   \_eq \hksearow\hksearrow  \_eq \hkswarow\hkswarrow
+
+   \_tracinglostchars=0
+   \_fontdef\small{\_setfontsize{at5pt}\_rm}
+   \_def\_printop{\_def\mathop{Op}}
+   \_def\mathalpha{Alph}\_def\mathord{Ord}\_def\mathbin{Bin}\_def\mathrel{Rel}
+   \_def\mathopen{Open}\_def\mathclose{Close}\_def\mathpunct{Punct}\_def\mathfence{Fence}
+   \_def\mathaccent{Acc}\_def\mathaccentwide{Accw}\_def\mathbotaccentwide{AccBw}
+   \_def\mathbotaccent{AccB}\_def\mathaccentoverlay{AccO}
+   \_def\mathover{Over}\_def\mathunder{Under}
+   \_typosize[7.5/9]\_normalmath \_everymath={}
+
+   Codes U+00000 \_dots\ U+10000
+   \_begmulti 3
+      \_input unimath-table.opm
+   \_endmulti
+
+   \_medskip\_goodbreak
+   Codes U+10001 \_dots\ U+1EEF1  \_let\UnicodeMathSymbol=\UnicodeMathSymbolA
+   \_begmulti 4
+      \_input unimath-table.opm
+   \_endmulti
+\_endgroup
+
+\_endcode
+
+This file can be used for testing your Unicode-math font
+and/or for printing \TeX/ sequences which can be used in math.
+
+Load Unicode math font first (for example by `\fontfam[termes]` or by
+`\loadmath{<math-font>}`) and then you
+can do `\input print-unimath.opm`. The big table with all math symbols is printed.
+
+\_endinput
diff --git a/Master/texmf-dist/tex/optex/base/ref-file.opm b/Master/texmf-dist/tex/optex/base/ref-file.opm
new file mode 100644
index 00000000000..d594bf88c04
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/ref-file.opm
@@ -0,0 +1,141 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \openref {File for references <2021-02-05>} % preloaded in format
+
+   \_doc --------------------------
+   The \`\_inputref` macro is used in `\everyjob`. It reads `\jobname.ref` file
+   if it exists. After the file is read then it is removed and opened to write
+   a new contents to this file.
+   \_cod --------------------------
+
+\_newwrite\_reffile
+
+\_def\_inputref {%
+  \_isfile{\_jobname.ref}\_iftrue
+     \_input {\_jobname.ref}
+     \_gfnotenum=0 \_lfnotenum=0 \_mnotenum=0
+     \_openrefA{\_string\_inputref}%
+  \_fi
+}
+
+   \_doc --------------------------
+   If the file does not exist then it is not created by default. It means that if you
+   process a document without any forward references then no `\jobname.ref`
+   file is created because it is unusable. The \^`\_wref` macro is a dummy in
+   this case.
+   \_cod --------------------------
+
+\_def\_wrefrelax#1#2{}
+\_let\_wref=\_wrefrelax
+
+   \_doc ---------------------
+   If a macro needs to create and to use `.ref` file then such macro must use
+   \`\openref`. When the file is created (using internal \`\_openrefA`) then
+   the \`\_wref` `\<macro>{<data>}` is redefined in order to
+   save the line `\<macro><data>` to the `.ref` file using asynchronous
+   `\write` primitive. Finally, the `\_openref` destroys itself, because we
+   need not open the file again.\nl
+   The `\_wref``<csname>{<params>}` does exactly `\write\_reffile{\string<csname><params>}`
+   in this case and \`\_ewref``<csname>{<params>}` does
+   `\write\_reffile{\string<csname><expanded-params>}`.
+   \_cod ---------------------
+
+\_def\_openref {%
+  \_ifx \_wref\_wrefrelax \_openrefA{\_string\openref}\_fi
+  \_gdef\_openref{}%
+}
+\_def\_openrefA #1{%
+   \_immediate\_openout\_reffile="\_jobname.ref"\_relax
+   \_gdef\_wref ##1##2{\_write\_reffile{\_bslash\_csstring##1##2}}%
+   \_immediate\_write\_reffile {\_pcent\_pcent\_space OPTeX <\_optexversion> - REF file (#1)}%
+   \_immediate\_wref \Xrefversion{{\_REFversion}}%
+}
+\_def\_ewref #1#2{\_edef\_ewrefA{#2}\_ea\_wref\_ea#1\_ea{\_ewrefA}}
+\_def\openref{\_openref}
+
+   \_doc ----------------------
+   We are using the convention that the macros used in `.ref` file are named
+   `\_X<foo>`. If there is a new version of \OpTeX/ with a different collection
+   of such macros then we don't want to read the `.ref` files produced by an
+   old version of \OpTeX/ or by OPmac. So the first line of `.ref` file is in
+   the form
+   \begtt \catcode`\<=13
+   \Xrefversion{<version>}
+   \endtt
+   We can check the version compatibility by this macro.
+   Because OPmac does not understand `\_Xrefversion` we use
+   \`\Xrefversion` (with a different number of `<version>` form OPmac) here.
+   The result: OPmac skips the `.ref` files produced by \OpTeX/ and vice
+   versa.
+   \_cod ----------------------
+
+\_def\_REFversion{5} % actual version of .ref files in OpTeX
+\_def\_Xrefversion#1{\_ifnum #1=\_REFversion\_relax \_else \_endinput \_fi}
+\_public \Xrefversion ; % we want to ignore .ref files generated by OPmac
+
+   \_doc -----------------------
+   You cannot define your special `.ref` macros before `.ref` file is read
+   because it is read in `\everyjob`. But you can define such macros using
+   \`\refdecl``{<definitions of your ref macros>}`.
+   This command sends to `.ref` file your `<definitions of your ref macros>`
+   immediately. Next lines in `.ref` file should include our macros. Example
+   from CTUstyle2:
+   \begtt
+   \refdecl{%
+      \def\totlist{} \def\toflist{}^^J
+      \def\Xtab#1#2#3{\addto\totlist{\totline{#1}{#2}{#3}}}^^J
+      \def\Xfig#1#2#3{\addto\toflist{\tofline{#1}{#2}{#3}}}
+   }
+   \endtt
+   We must read `<definition of your ref macros>` when the catcode of `#` is 12
+   because we needn't duplicate each `#` in the `.ref` file.
+   \_cod \_fin -----------------
+
+\_def\_refdecl{\_bgroup \_catcode`\#=12 \_refdeclA}
+\_def\_refdeclA #1{\egroup\_openref
+   \_immediate\_write\_reffile {\_pcent\_space \_string \refdecl:}%
+   \_immediate\_write\_reffile {\_detokenize{#1}}%
+}
+\_public \refdecl ;
+
+\_endcode % ================================================
+
+
+The `.ref` file has the name `\jobname.ref` and
+it saves information about references, TOC lines, etc.
+All data needed in next \TeX/ run are saved here.
+\OpTeX/ reads this file at the beginning of the document
+(using `\everyjob`) if such file exists.
+The `.ref` file looks like:
+
+\begtt \catcode`\<=13
+\Xrefversion{<ref-version>}
+\_Xpage{<gpageno>}{<pageno>}
+\_Xtoc{<level>}{<type>}{<text>}{}<title>
+\_Xlabel{<label>}{<text>}
+\_Xlabel{<label>}{<text>}
+...
+\_Xpage{<gpageno>}{<pageno>}
+\_Xlabel{<label>}{<text>}
+...
+\endtt
+%
+where <gpageno> is internal page number globally numbered from one and
+`<pageno>` is a page number (`\the\pageno`) used in pagination (they may differ).
+Each page begins with \^`\_Xpage`.
+The `<label>` is a label used by user in `\label[<label>]` and `<text>` is a
+text which should be referenced (the number of section or table, for
+example `2.3.14`). The `<title>` is the title of the chapter (`<level>`=1,
+`<type>`=`chap`), section (`<level>`=2, `<type>`=`sec`), subsection
+(`<level>`=3, `<type>`=`secc`). The \^`\_Xpage` is written at the beginning of each
+page, the `\_Xtoc` is written when chapter or section or subsection title
+exists on the page and `\_Xlabel` when labeled object prefixed by
+`\label[<label>]` exists on the page.
+
+The `.ref` file is read when the processing of the document starts using
+`\everyjob`. It is read, removed, and opened to writing immediately.
+But the `.ref` file should be missing. If none forward references are needed
+in the document then `.ref` file is not created. For example, you only want
+to test a simple plain \TeX/ macro, you create `test.tex` file, you do
+`optex test` and you don't need to see an empty `test.ref` file in your directory.
+
diff --git a/Master/texmf-dist/tex/optex/base/references.opm b/Master/texmf-dist/tex/optex/base/references.opm
new file mode 100644
index 00000000000..03c8f6955ca
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/references.opm
@@ -0,0 +1,94 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \ref {References <2020-03-03>} % preloaded in format
+
+   \_doc ----------------------------
+   \`\_Xpage` `{<gpageno>}{<pageno>}` saves the parameter pair into \`\_currpage`.
+   Resets `\_lfnotenum`; it is used if footnotes are numbered from one at each page.
+   \_cod ----------------------------
+
+\_def\_Xpage#1#2{\_def\_currpage{{#1}{#2}}\_lfnotenum=0 }
+
+   \_doc ----------------------------
+   Counter for the number of unresolved references \`\_unresolvedrefs`.
+   \_cod ----------------------------
+
+\_newcount\_unresolvedrefs
+\_unresolvedrefs=0
+
+   \_doc ----------------------------
+   \`\_Xlabel` `{<label>}{<text>}` saves the <text> to `\_lab:<label>` and saves
+   `[pg:<gpageno>]{<pageno>}` to `\_pgref:<label>`.
+   \_cod ----------------------------
+
+\_def\_Xlabel#1#2{\_sdef{_lab:#1}{#2}\_sxdef{_pgref:#1}{\_ea\_bracketspg\_currpage}}
+\_def\_bracketspg#1#2{[pg:#1]{#2}}
+
+   \_doc ----------------------------
+   \`\label``[<label>]` saves the decalred label to `\_lastlabel` and
+   \`\wlabel``{<text>}` uses the `\_lastlabel` and activates
+   `\_wref\_Xlabel{<label>}{<text>}`.
+   \_cod ----------------------------
+
+\_def\_label[#1]{\_isempty{#1}\_iftrue \_global\_let \_lastlabel=\_undefined
+  \_else \_isdefined{l0:#1}%
+     \_iftrue \_opwarning{duplicated label [#1], ignored}\_else \_xdef\_lastlabel{#1}\_fi
+  \_fi \_ignorespaces
+}
+\_def\_wlabel#1{%
+  \_ifx\_lastlabel\_undefined \_else
+     \_dest[ref:\_lastlabel]%
+     \_printlabel\_lastlabel
+     \_ewref \_Xlabel {{\_lastlabel}{#1}}%
+     \_sxdef{_lab:\_lastlabel}{#1}\_sxdef{l0:\_lastlabel}{}%
+     \_global\_let\_lastlabel=\_undefined
+  \_fi
+}
+\_public \label \wlabel ;
+
+   \_doc ----------------------------
+   \`\ref``[<label>]` uses saved `\_lab:<label>` and prints (linked) `<text>`.
+   If the reference is backward then we know `\lab:<label>` without any need
+   to read REF file. On the other hand, if the reference is forwarded, then we
+   doesn't know `\_lab:<label>` in the first run of \TeX/ and we print a warning and
+   do `\_openref`.
+   \nl
+   \`\pgref``[<label>]` uses `{<gpageno>}{<pageno>}` from `\_pgref:<label>` and
+   prints (linked) `<pageno>` using `\_ilink` macro.
+   \_cod ----------------------------
+
+\_def\_ref[#1]{\_isdefined{_lab:#1}%
+  \_iftrue \_ilink[ref:#1]{\_csname _lab:#1\_endcsname}%
+  \_else ??\_opwarning{label [#1] unknown. Try to TeX me again}%
+  \_incr\_unresolvedrefs \_openref
+  \_fi
+}
+\_def\_pgref[#1]{\_isdefined{_pgref:#1}%
+  \_iftrue \_ea\_ea\_ea\_ilink \_csname _pgref:#1\_endcsname
+  \_else ??\_opwarning{pg-label [#1] unknown. Try to TeX me again}%
+  \_incr\_unresolvedrefs \_openref
+  \_fi
+}
+\_public \ref \pgref ;
+
+   \_doc -----------------------------
+   Default \`\_printlabel` is empty macro (labels are not printed).
+   The \`\showlabels` redefines it as box with zero dimensions and
+   with left lapped `[<label>]` in blue 10pt `\tt` font shifted up by 1.7ex.
+   \_cod -----------------------------
+
+\_def\_printlabel#1{}
+\_def\_showlabels {%
+   \_def\_printlabel##1{\_vbox to\_zo{\_vss\_llap{\_labelfont[##1]}\_kern1.7ex}}%
+   \_fontdef\_labelfont{\_setfontsize{at10pt}\setfontcolor{blue}\_tt}
+}
+\_public \showlabels ;
+
+\_endcode %------------------------------------------
+
+
+If the references are \"forward" (i.~e. the `\ref` is used first, the destination
+is created later) or if the reference text is page number then we must read
+`.ref` file first in order to get appropriate information.
+See section \ref[ref-file] for more information about `.ref` file concept.
+
diff --git a/Master/texmf-dist/tex/optex/base/sections.opm b/Master/texmf-dist/tex/optex/base/sections.opm
new file mode 100644
index 00000000000..39759962bf8
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/sections.opm
@@ -0,0 +1,469 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \chap {Titles, chapters, sections, subsections <2021-03-03>} % preloaded in format
+
+   \_doc ---------------------------
+   We are using scaled fonts for titles
+   \`\_titfont`, \`\_chapfont`, \`\_secfont` and \`\_seccfont`.
+   They are scaled from main fonts size
+   of the document, which is declared by first `\typosize[<fo-size>/<b-size>]`
+   command.
+   \_cod ---------------------------
+
+\_def \_titfont  {\_scalemain\_typoscale[\_magstep4/\_magstep5]\_boldify}
+\_def \_chapfont {\_scalemain\_typoscale[\_magstep3/\_magstep3]\_boldify}
+\_def \_secfont  {\_scalemain\_typoscale[\_magstep2/\_magstep2]\_boldify}
+\_def \_seccfont {\_scalemain\_typoscale[\_magstep1/\_magstep1]\_boldify}
+
+   \_doc ---------------------------
+   The \`\tit` macro is defined using \^`\scantoeol` and \`\_printtit`.
+   It means that the parameter is
+   separated by end of line and inline verbatim is allowed. The same
+   principle is used in the \^`\chap`, \^`\sec`, and \^`\secc` macros.
+   \_cod ---------------------------
+
+\_def\_printtit #1{\_vglue\_titskip
+  {\_leftskip=0pt plus1fill \_rightskip=\_leftskip % centering
+   \_titfont \_noindent \_scantextokens{#1}\_par}%
+   \_nobreak\_bigskip
+}
+\_def\_tit{\_scantoeol\_printtit}
+
+\_public \tit ;
+
+   \_doc ---------------------------
+   You can re-define \`\_printchap`, \`\_printsec` or \`\_printsecc` macros if
+   another design of section titles is needed. These macros get the
+   `<title>` text in its parameter. The common recommendations for these macros are:
+   \begitems
+   * Use \^`\_abovetitle``{<penaltyA>}{<skipA>}` and \^`\_belowtitle``{<skipB>}`
+     for inserting vertical material above and below the section title.
+     The arguments of these macros are normally used, i.\,e.\ \^`\_abovetitle`
+     inserts `<penaltyA><skipA>` and \^`\_belowtitle` inserts `<skipB>`.
+     But there is an
+     exception: if \^`\_belowtitle``{<skipB>}` is immediately followed by
+     \^`\_abovetitle``{<penaltyA>}{<skipA>}` (for example section title is
+     immediately followed by subsection title), then only `<skipA>` is generated,
+     i.\,e.\ `<skipB><penaltyA><skipA>` is reduced only to `<skipA>`.
+     The reason for such behavior: we don't want to duplicate vertical skip
+     and we don't want to use the negative penalty in such cases.
+     Moreover, \^`\_abovetitle``{<penaltyA>}{<skipA>}` takes previous whatever
+     vertical skip (other than from `\_belowtitle`) and generates only
+     greater from this pair of skips. It means that `<whatever-skip><penaltyA><skipA>`
+     is transformed to `<penaltyA>`max(`<whatever-skip><skipA>`).
+     The reason for such behavior: we don't want to
+     duplicate vertical skips (from `\_belowlistskip`, for example) above the title.
+   * Use \^`\_printrefnum``[<pre>@<post>]` in horizontal mode. It prints
+     `<pre><ref-num><post>`. The `<ref-num>` is \^`\_thechapnum` or \^`\_thesecnum`
+     or \^`\_theseccnum` depending on what type o title is processed.
+     If \^`\nonum` prefix is used then \^`\_printrefnum` prints nothing.
+     The macro \^`\_printrefnum` does more work: it creates destination of hyperlinks
+     (if \^`\hyperlinks``{}{}` is used) and saves references from the label (if
+     \^`\label``[<label>]` precedes) and saves references for the table of contents
+     (if \^`\maketoc` is used).
+   * Use \^`\nbpar` for closing the paragraph for printing title. This
+     command inserts `\_nobreak` between each line of such paragraph, so
+     the title cannot be broken into more pages.
+   * You can use \^`\_firstnoindent` in order to the first paragraph after
+     the title is not indented.
+   \enditems
+   \_cod ---------------------------
+
+\_def\_printchap #1{\_vfill\_supereject
+   \_vglue\_medskipamount % shifted by topkip+\medskipamount
+   {\_chapfont \_noindent \_mtext{chap} \_printrefnum[@]\_par
+    \_nobreak\_smallskip
+    \_noindent \_raggedright #1\_nbpar}\_mark{}%
+   \_nobreak \_belowtitle{\_bigskip}%
+   \_firstnoindent
+}
+\_def\_printsec#1{\_par
+   \_abovetitle{\_penalty-400}\_bigskip
+   {\_secfont \_noindent \_raggedright \_printrefnum[@\_quad]#1\_nbpar}\_insertmark{#1}%
+   \_nobreak \_belowtitle{\_medskip}%
+   \_firstnoindent
+}
+\_def\_printsecc#1{\_par
+   \_abovetitle{\_penalty-200}{\_medskip\_smallskip}
+   {\_seccfont \_noindent \_raggedright \_printrefnum[@\_quad]#1\_nbpar}%
+   \_nobreak \_belowtitle{\_medskip}%
+   \_firstnoindent
+}
+
+   \_doc --------------------------
+   The \`\_sectionlevel` is the level of the printed section:
+   \begitems
+   * `\_sectionlevel=0` -- reserved for parts of the book (unused by default)
+   * `\_sectionlevel=1` -- chapters (used in `\chap`)
+   * `\_sectionlevel=2` -- sections (used in `\sec`)
+   * `\_sectionlevel=3` -- subsections (used in `\secc`)
+   * `\_sectionlevel=4` -- subsubsections (unused by default, see the
+     \ulink[http://petr.olsak.net/optex/optex-tricks.html\#seccc]{\OpTeX/ trick 0033})
+   \enditems
+   \_cod --------------------------
+
+\_newcount\_sectionlevel
+\_def \_secinfo {\_ifcase \_sectionlevel
+   part\_or chap\_or sec\_or secc\_or seccc\_fi
+}
+
+   \_doc --------------------------
+   The \`\_chapx` initializes counters used in chapters,
+   the \`\_secx` initializes counters in sections
+   and \`\_seccx` initializes counters in subsections.
+   If you have more types of numbered objects in your document then you can
+   declare appropriate counters and do `\addto\_chapx{\yourcounter=0 }`
+   for example. If you have another concept of numbering objects used in your
+   document, you can re-define these macros. All settings here are global
+   because it is used by `{\_globaldefs=1 \_chapx}`.
+
+   Default concept: Tables, figures, and display maths are numbered
+   from one in each section -- subsections don't reset these counters.
+   Footnotes declared by \^`\fnotenumchapters` are numbered in each chapter
+   from one.
+
+   The `\_the*` macros
+   \`\_thechapnum`, \`\_thesecnum`, \`\_theseccnum`,
+   \`\_thetnum`, \`\_thefnum` and \`\_thednum`
+   include the format of numbers used when the object
+   is printing. If chapter is never used in the document then `\_chapnum=0`
+   and \`\_othe``\_chapnum.` expands to empty. Sections have numbers <num> and
+   subsections <num>.<num>. On the other hand, if chapter is used in the
+   document then `\_chapnum>0` and sections have numbers` <num>.<num>`
+   and subsections have numbers `<num>.<num>.<num>`.
+   \_cod --------------------------
+
+\_newcount \_chapnum  % chapters
+\_newcount \_secnum   % sections
+\_newcount \_seccnum  % subsections
+\_newcount \_tnum     % table numbers
+\_newcount \_fnum     % figure numbers
+\_newcount \_dnum     % numbered display maths
+
+\_def \_chapx {\_secx  \_secnum=0  \_lfnotenum=0 }
+\_def \_secx  {\_seccx \_seccnum=0 \_tnum=0 \_fnum=0 \_dnum=0 \_resetABCDE }
+\_def \_seccx {}
+
+\_def \_thechapnum {\_the\_chapnum}
+\_def \_thesecnum  {\_othe\_chapnum.\_the\_secnum}
+\_def \_theseccnum {\_othe\_chapnum.\_the\_secnum.\_the\_seccnum}
+\_def \_thetnum    {\_othe\_chapnum.\_othe\_secnum.\_the\_tnum}
+\_def \_thefnum    {\_othe\_chapnum.\_othe\_secnum.\_the\_fnum}
+\_def \_thednum    {(\_the\_dnum)}
+
+\_def\_othe #1.{\_ifnum#1>0 \_the#1.\_fi}
+
+   \_doc ----------------------------
+   The \`\notoc` and \`\nonum` prefixes are implemented by
+   internal `\_ifnotoc` and `\_ifnonum`. They are reset
+   after each chapter/section/subsection by the \`\_resetnonumnotoc` macro.
+   \_cod ----------------------------
+
+\_newifi \_ifnotoc  \_notocfalse  \_def\_notoc {\_global\_notoctrue}
+\_newifi \_ifnonum  \_nonumfalse  \_def\_nonum {\_global\_nonumtrue}
+\_def \_resetnonumnotoc{\_global\_notocfalse \_global\_nonumfalse}
+\_public \notoc \nonum ;
+
+   \_doc ----------------------------
+   The \`\chap`, \`\sec`, and \`\secc` macros are implemented here.
+   The \`\_inchap`, \`\_insec` and \`\_insecc` macros do the real work,
+   First, we read the optional parameter `[<label>]`, if it exists.
+   The `\chap`, `\sec` and `\secc` macro reads its parameter using
+   \^`\scantoeol`. This causes that they cannot be used inside other macros.
+   Use \`\_inchap`, \`\_insec`, and \`\_insecc` macros directly in such case.
+   \_cod ----------------------------
+
+\_optdef\_chap[]{\_trylabel \_scantoeol\_inchap}
+\_optdef\_sec []{\_trylabel \_scantoeol\_insec}
+\_optdef\_secc[]{\_trylabel \_scantoeol\_insecc}
+\_def\_trylabel{\_istoksempty\_opt\_iffalse \_label[\_the\_opt]\_fi}
+
+\_def\_inchap #1{\_par \_sectionlevel=1
+   \_def \_savedtitle {#1}% saved to .ref file
+   \_ifnonum \_else {\_globaldefs=1 \_incr\_chapnum \_chapx}\_fi
+   \_edef \_therefnum {\_ifnonum \_space \_else \_thechapnum \_fi}%
+   \_printchap{\_scantextokens{#1}}%
+   \_resetnonumnotoc
+}
+\_def\_insec #1{\_par \_sectionlevel=2
+   \_def \_savedtitle {#1}% saved to .ref file
+   \_ifnonum \_else {\_globaldefs=1 \_incr\_secnum \_secx}\_fi
+   \_edef \_therefnum {\_ifnonum \_space \_else \_thesecnum \_fi}%
+   \_printsec{\_scantextokens{#1}}%
+   \_resetnonumnotoc
+}
+\_def\_insecc #1{\_par \_sectionlevel=3
+   \_def \_savedtitle {#1}% saved to .ref file
+   \_ifnonum \_else {\_globaldefs=1 \_incr\_seccnum \_seccx}\_fi
+   \_edef \_therefnum {\_ifnonum \_space \_else \_theseccnum \_fi}%
+   \_printsecc{\_scantextokens{#1}}%
+   \_resetnonumnotoc
+}
+\_public \chap \sec \secc ;
+
+   \_doc ----------------------------
+   The \`\_printrefnum``[<pre>@<post>]` macro is used in `\_print*` macros.
+
+   Note that the `<tite-text>` is `\detokenize`d before `\_wref`, so the
+   problem of \"fragile macros" from old \LaTeX/ never occurs.
+   This fourth parameter is not delimited by `{...}` but by end of line.
+   This gives possibility to have unbalanced braces in inline verbatim in titles.
+   \_cod ----------------------------
+
+\_def \_printrefnum [#1@#2]{\_leavevmode % we must be in horizontal mode
+   \_ifnonum \_else #1\_therefnum #2\_fi
+   \_wlabel \_therefnum  % references, if `\label[<label>]` is declared
+   \_ifnotoc \_else \_incr \_tocrefnum
+       \_dest[toc:\_the\_tocrefnum]%
+       \_ewref\_Xtoc{{\_the\_sectionlevel}{\_secinfo}%
+                     {\_therefnum}{\_theoutline}\_detokenize\_ea{\_savedtitle}}%
+   \_fi
+   \_gdef\_theoutline{}%
+}
+
+   \_doc -----------------------------
+   \`\thisoutline``{<text>}` saves text to the \`\_theoutline` macro.
+   \^`\_printrefnum` uses it and removes it.
+   \_cod -----------------------------
+
+\_def\_theoutline{}
+\_def\_thisoutline#1{\_gdef\_theoutline{#1}}
+\_public \thisoutline ;
+
+   \_doc -----------------------------
+   The \`\_abovetitle``{<penaltyA>}{<skipA>}` and \`\_belowtitle``{<skipB>}` pair
+   communicates using a special penalty 11333 in vertical mode.
+   The `\_belowtitle` puts the vertical skip (its value is saved in
+   `\_savedtitleskip`) followed by this special penalty.
+   The `\_abovetitle` reads `\lastpenalty` and if it has this special value
+   then it removes the skip used before and doesn't use the parameter.
+   The `\abovetitle` creates `<skipA>` only if whatever previous skip is less
+   or equal than `<skipA>`. We must save `<whatever-skip>`, remove it,
+   create `<penaltyA>` (if `\_belowtitle` does not precede) and create
+   <whatever-skip> or `<skipA>` depending on what is greater.
+   The amount of `<skipA>` is measured using `\setbox0=\vbox`.
+   \_cod -----------------------------
+
+\_newskip \_savedtitleskip
+\_newskip \_savedlastskip
+\_def\_abovetitle #1#2{\_savedlastskip=\_lastskip % <whatever-skip>
+   \_ifdim\_lastskip>\_zo \_vskip-\_lastskip \_fi
+   \_ifnum\_lastpenalty=11333 \_vskip-\_savedtitleskip \_else #1\_fi
+   \_ifdim\_savedlastskip>\_zo \_setbox0=\_vbox{#2\_global\_tmpdim=\_lastskip}%
+   \_else \_tmpdim=\_maxdimen \_fi
+   \_ifdim\_savedlastskip>\_tmpdim \vskip\_savedlastskip \_else #2\_fi
+}
+\_def\_belowtitle #1{#1\_global\_savedtitleskip=\_lastskip \_penalty11333 }
+
+   \_doc -----------------------------
+   \`\nbpar` sets `\interlinepenaty` value.
+   \`\nl` is \"new line" in the text (or titles), but space in toc or headlines or outlines.
+   \_cod -----------------------------
+
+\_def\_nbpar{{\_interlinepenalty=10000\_endgraf}}
+
+\_protected\_def\_nl{\_unskip\_hfil\_break}
+\_regmacro {\_def\_nl{\_unskip\_space}} {\_def\_nl{\_unskip\_space}} {\_def\_nl{ }}
+\_regmacro {\_def\nl{\_unskip\_space}}  {\_def\nl{\_unskip\_space}}  {\_def\nl{ }}
+
+\_public \nbpar \nl ;
+
+   \_doc -----------------------------
+   \`\_firstnoindent` puts a material to `\everypar` in order to next
+   paragraph will be without indentation. It is useful after titles.
+   If you dislike this feature then you can say `\let\_firtnoindent=\relax`.
+   The \`\_wipeepar` removes the material from `\everypar`.
+   \_cod -----------------------------
+
+\_def \_firstnoindent {\_global\_everypar={\_wipeepar \_setbox7=\_lastbox}}
+\_def \_wipeepar {\_global\_everypar={}}
+
+   \_doc -----------------------------
+   The `\mark` (for running heads) is used in `\_printsection` only. We
+   suppose that chapters will be printed after `\vfil\break`, so users can
+   implement chapter titles for running headers directly by macros, no
+   `\mark` mechanism is needed. But sections need `\mark`s. And they can be
+   mixed with chapter's running heads, of course.
+
+   The \`\_insertmark``{<title text>}` saves `\mark` in the format
+   `{<title-num>} {<title-text>}`, so it can be printed \"as is" in
+   `\headline` (see the space between them), or you can define a formating
+   macro with two parameters for processing these data, if you need it.
+   \_cod -----------------------------
+
+\_def\_insertmark#1{\_mark{{\_ifnonum\_else\_therefnum\_fi} {\_unexpanded{#1}}}}
+
+   \_doc -----------------------------
+   \OpTeX/ sets `\headline={}` by default, so no running headings are printed.
+   You can activate the running headings by following code, for example:
+   \begtt
+   \addto\_chapx {\_edef\_runningchap {\_thechapnum: \_unexpanded\_ea{\_savedtitle}}}
+   \def \formathead #1#2{\isempty{#1}\iffalse #1: #2\fi}
+   \headline = {%
+      \ifodd \pageno
+          \hfil \ea\formathead\firstmark{}{}%
+      \else
+          Chapter: \runningchap \hfil
+      \fi
+   }
+   \endtt
+
+   The \`\secl``<number> <title-text><eol>`
+   should be used for various levels of sections (for example, when
+   converting from Markdown to \OpTeX/). `\secl1` is `\chap`, `\secl2` is `\sec`,
+   `\secl3` is `\secc` and all more levels (for <number>$>3$)
+   are printed by the common \`\_seclp` macro. It declares only a simple design.
+   If there is a requirement to use such more levels then the book designer can
+   define something different here.
+   \_cod -----------------------------
+
+\_def\_secl{\_afterassignment\_secla \_sectionlevel=}
+\_def\_secla{\_ifcase\_sectionlevel
+   \_or\_ea\_chap\_or\_ea\_sec\_or\_ea\_secc\_else\_ea\_seclp\_fi}
+\_eoldef\_seclp#1{\_par \_ifnum\_lastpenalty=0 \_removelastskip\_medskip\_fi
+   \_noindent{\_bf #1}\_vadjust{\_nobreak}\_nl\_ignorepars}
+\_def\_ignorepars{\_isnextchar\_par{\_ignoresecond\_ignorepars}{}}
+
+\_public \secl ;
+
+   \_doc -----------------------------
+   The \`\caption``/<letter>` increases `\_<letter>num` counter,
+   edefines \`\_thecapnum` as `\_the<letter>num` and
+   defines \`\_thecaptitle` as language-dependent word using \^`\_mtext`,
+   runs the `\_everycaption<letter>` tokens register.
+   The group opened by `\caption` is finalized by first `\par` from
+   an empty line or from `\vskip` or from `\endinsert`.
+   The `\_printcaption<letter>` is called, it starts with
+   printing of the caption.\nl
+   The \`\cskip` macro inserts nonbreakable vertical space between the caption and
+   the object.
+   \_cod -----------------------------
+
+\_def\_caption/#1{\_def\_tmpa{#1}\_nospaceafter \_capA}
+\_optdef\_capA []{\_trylabel \_incaption}
+\_def\_incaption {\_bgroup
+   \_ifcsname _\_tmpa num\_endcsname \_ea\_incr \_csname _\_tmpa num\_endcsname
+   \_else \_opwarning{Unknown caption /\_tmpa}\_fi
+   \_edef\_thecapnum {\_csname _the\_tmpa num\_endcsname}%
+   \_edef\_thecaptitle{\_mtext{\_tmpa}}%
+   \_ea\_the \_csname _everycaption\_tmpa\_endcsname
+   \_def\_par{\_nbpar\_egroup}\_let\par=\_par
+   \_cs{_printcaption\_tmpa}%
+}
+\_def \_cskip {\_par\_nobreak\_medskip} % space between caption and the object
+
+\_public \caption \cskip ;
+
+   \_doc -----------------------------
+   The \`\_printcaptiont` and \`\_printcaptionf` macros start in vertical mode.
+   They switch to horizontal mode and use `\_wlabel\_thecapnum` (in order to
+   make reference and hyperlink destination) a they can use:
+   \begitems
+   * \^`\_thecaptitle` ... expands to the word Table or Figure (depending on
+                           the current language).
+   * \^`\_thecapnum` ...   expands to `\the<letter>num` (caption number).
+   \enditems
+   The \`\_captionsep` inserts a separator between auto-generated
+   caption number and the following caption text. Default separator
+   is `\_enspace` but if the caption text starts with dot or colon, then
+   the space is not inserted. A user can wite `\caption/t: My table`
+   and \"{\bf Table 1.1:} My table" is printed. You can re-define
+   the \^`\_captionsep` macro if you want to use another separator.
+   \_cod -----------------------------
+
+\_def \_printcaptiont {%
+   \_noindent \_wlabel\_thecapnum {\_bf\_thecaptitle~\_thecapnum}%
+   \_narrowlastlinecentered\_iindent \_futurelet\_next\_captionsep
+}
+\_def\_captionsep{\_ifx\_next.\_ea\_bfnext \_else\_ifx\_next:\_ea\_ea\_ea\_bfnext
+   \_else \_enspace \_fi\_fi}
+\_def\_bfnext#1{{\_bf#1}}
+\_let \_printcaptionf = \_printcaptiont % caption of figures = caption of tables
+
+   \_doc -----------------------------
+   If you want to declare a new type of `\caption` with independent counter,
+   you can use following lines, where `\caption/a` for Algorithms are
+   declared:
+   \begtt
+   \let\_printcaptiona = \_printcaptionf  \let\_everycaptiona = \_everycaptionf
+   \newcount\_anum  \addto\_secx {\_anum=0 }
+   \def\_theanum {\_othe\_chapnum.\_the\_secnum.\_the\_anum}
+   \sdef{_mt:a:en}{Algorithm}  \sdef{_mt:a:cs}{Algoritmus} % + your language...
+   \endtt
+   The default format of `\caption` text is a paragraph in block narrower by
+   `\_iindent` and with the last line is centered. This setting is done by
+   the \`\_narrowlastlinecentered` macro.
+   \_cod -----------------------------
+
+\_def\_narrowlastlinecentered#1{%
+   \_leftskip=#1plus1fil
+   \_rightskip=#1plus-1fil
+   \_parfillskip=0pt plus2fil\_relax
+}
+
+   \_doc -----------------------------
+   \`\eqmark` is processed in display mode (we add `\eqno` primitive)
+   or in internal mode when `\eqaligno` is used (we don't add `\eqno`).
+   \_cod -----------------------------
+
+\_optdef\_eqmark []{\_trylabel \_ineqmark}
+\_def\_ineqmark{\_incr\_dnum
+  \_ifinner\_else\_eqno \_fi
+  \_wlabel\_thednum \_hbox{\_thednum}%
+}
+\_public \eqmark ;
+
+   \_doc -----------------------------
+   The \`\numberedpar` `<letter>{<name>}` is implemented here.
+   \_cod -----------------------------
+
+\_newcount\_counterA \_newcount\_counterB \_newcount\_counterC
+\_newcount\_counterD \_newcount\_counterE
+
+\_def\_resetABCDE {\_counterA=0 \_counterB=0 \_counterC=0 \_counterD=0 \_counterE=0 }
+
+\_def \_theAnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterA}
+\_def \_theBnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterB}
+\_def \_theCnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterC}
+\_def \_theDnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterD}
+\_def \_theEnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterE}
+
+\_def\_numberedpar#1#2{\_ea \_incr \_csname _counter#1\_endcsname
+   \_def\_tmpa{#1}\_def\_tmpb{#2}\_numberedparparam}
+\_optdef\_numberedparparam[]{%
+   \_ea \_printnumberedpar \_csname _the\_tmpa num\_ea\_endcsname\_ea{\_tmpb}}
+
+\_public \numberedpar ;
+
+   \_doc -----------------------------
+   The \`\_printnumberedpar` `\theXnum {<name>}` opens numbered paragraph and
+   prints it. The optional parameter is in `\_the\_opt`. You can re-define
+   it if you need another design.
+
+   `\_printnumberedpar` needs not to be re-defined if you only want to print
+   Theorems in italic and to insert vertical skips (for example). You can do this
+   by the following code:
+   \begtt
+   \def\theorem    {\medskip\bgroup\it \numberedpar A{Theorem}}
+   \def\endtheorem {\par\egroup\medskip}
+
+   \theorem Let $M$ be... \endtheorem
+   \endtt
+   \_cod -----------------------------
+
+\_def \_printnumberedpar #1#2{\_par
+   \_noindent\_wlabel #1%
+   {\_bf #2 #1\_istoksempty\_opt\_iffalse \_space \_the\_opt \_fi.}\_space
+   \_ignorespaces
+}
+
+\_endcode % -------------------------------------
+
+2021-03-03 \_captionsep introduced, \_othe used in \_thetnum, \_thefnum.
+2021-02-09 \thisoutline implemented
+2021-01-26 \_nl: \unskip added
+2021-01-11 \secl introduced
+2021-01-05 \_thednum printed in text mode in its both occurences.
+2020-04-28 \_secfonts etc: \_boldify is last.
+2020-04-22 \_chapx, \_secx, \_seccx rewritten
+2020-03-14 introduced
diff --git a/Master/texmf-dist/tex/optex/base/slides.opm b/Master/texmf-dist/tex/optex/base/slides.opm
new file mode 100644
index 00000000000..94fa3afac83
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/slides.opm
@@ -0,0 +1,247 @@
+% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \slideshow {Slides style for OpTeX <2021-03-10>} % loaded on demand by \slides
+
+   \_doc -----------------------------
+   Default margins and design is declared here.
+   The `\_ttfont` is scaled by `mag1.15` in order to balance the
+   ex height of Helvetica (Heros) and LM fonts Typewriter.
+   The `\begtt`...`\endtt` verbatim is printed by smaller text.
+   \_cod -----------------------------
+
+\_margins/1 a5l (14,14,10,3)mm  % landscape A5 format
+\_def\_wideformat{\_margins/1 (263,148) (16,16,10,3)mm } % 16:9 format
+
+\_ifx\_fontnamegen\_undefined \_fontfam[Heros]
+   \_let\_ttfont=\_undefined \_famvardef\_ttfont{\_setfontsize{mag1.15}\_tt}
+\_fi
+\_typosize[16/19]
+\_def\_urlfont{}
+\_everytt={\_typosize[13/16] \_advance\_hsize by10mm}
+\_fontdef\_fixbf{\_bf}
+
+\_nopagenumbers
+\_parindent=0pt
+\_ttindent=5mm
+\_parskip=5pt plus 4pt minus2pt
+\_rightskip=0pt plus 1fil
+\_ttindent=10pt
+\_def\_ttskip{\_smallskip}
+
+\_onlyrgb   % RGB color space is better for presentations
+
+   \_doc -----------------------------
+   The bottom margin is set to 3\,mm. If we use 1\,mm, then the baseline of
+   `\footline` is 2\,mm from the bottom page. This is the depth of the `\Grey`
+   rectangle used for page numbers. It is r-lapped to `\hoffset` width because left
+   margin = `\hoffset` = right margin. It is 14\,mm for narrow pages or
+   16\,mm for wide pages.
+   \_cod -----------------------------
+
+\_footlinedist=1mm
+\_footline={\_hss \_rlap{%
+   \_rlap{\Grey\_kern.2\_hoffset\_vrule height6mm depth2mm width.8\_hoffset}%
+                      \_hbox to\_hoffset{\White\_hss\_folio\_kern3mm}}}
+
+   \_doc -----------------------------
+   The \`\subtit` is defined analogically like `\tit`.
+   \_cod -----------------------------
+
+\_eoldef\_subtit#1{\_vskip20pt {\_leftskip=0pt plus1fill \_rightskip=\_leftskip
+   \_subtitfont #1\_nbpar}}
+
+   \_doc -----------------------------
+   The \`\pshow``<num>` prints the text in invisible
+   (transparent) font when \^`\layernum`\code{<}`<num>`.
+   The transparency is set by `\pdfpageresoyrces` primitive.
+   \_cod -----------------------------
+
+\pdfpageresources{/ExtGState << /Invisible << /Type /ExtGState /ca 0 /CA 0 >>
+                                /Visible   << /Type /ExtGState /ca 1 /CA 1 >> >>}
+\addto\_morepgresources{/Invisible << /Type /ExtGState /ca 0 /CA 0 >>
+                        /Visible   << /Type /ExtGState /ca 1 /CA 1 >>}
+\def\Invisible {\_pdfliteral{/Invisible gs}}
+\def\Visible   {\_pdfliteral{/Visible gs}}
+\def\Transparent {\Invisible \_aftergroup \Visible}
+
+\_def\_use#1#2{\_ifnum\_layernum#1\_relax#2\_fi}
+\_def\_pshow#1{\_use{=#1}\Red \_use{<#1}\Transparent \_ignorespaces}
+
+   \_doc -----------------------------
+   The main level list of items is activated here. The `\_item:X` and
+   `\_item:x` are used and are re-defined here.
+   If we are in a nested level of items and `\pg+` is used then
+   `\egroups` macro expands to the right number of `\egroup`s
+   to close the page correctly. The level of nested item lists
+   is saved to the `\_ilevel` register and used when we start again
+   the next text after `\pg+`.
+   \_cod -----------------------------
+
+\_newcount\_gilevel
+\_def\*{*}
+\_adef*{\_relax\_ifmmode*\_else\_ea\_startitem\_fi}
+\_sdef{_item:X}{\Blue\_raise.2ex\_fullrectangle{.8ex}\_kern.5em}
+\_sdef{_item:x}{\Blue\_raise.3ex\_fullrectangle{.6ex}\_kern.4em}
+\_style X
+\_def\_egroups{\_par\_global\_gilevel=\_ilevel \_egroup}
+\_everylist={\_novspaces \_ifcase\_ilevel \_or \_style x \_else \_style - \_fi
+   \_addto\_egroups{\_egroup}}
+
+   \_doc -----------------------------
+   The default values of \`\pg`, i.\,e.\ `\pg;`, `\pg+` and `\pg.` are very simple.
+   They are used when `\showslides` is not specified.
+   \_cod -----------------------------
+
+\_def\_pg#1{\_cs{_spg:#1}}
+\_sdef{_spg:;}{\_vfil\_break \_lfnotenumreset}
+\_sdef{_spg:.}{\_endslides}
+\_sdef{_spg:+}{\_par}
+
+   \_doc -----------------------------
+   The \`\_endslides` is defined as `\_end` primitive, but
+   slide-designer can redefine it. For example,
+   \ulink[http://petr.olsak.net/optex/optex-tricks.html\#slider]{OpTeX trick 0029}
+   shows how to define clickable navigation to the pages and how to check
+   the data integrity at the end of the document using `\_endslides`.
+
+   The `\bye` macro is redefined here as an alternative to `\pg.`.
+   \_cod -----------------------------
+
+\_def\_endslides{\_end}
+\_def\bye{\_pg.}
+
+   \_doc -----------------------------
+   We need no numbers and no table of contents when using slides.
+   The \^`\_printsec` macro is redefined in order the title is centered
+   and typeset in `\Blue`.
+   \_cod -----------------------------
+
+\_def\_titfont{\_typosize[42/60]\_bf \Blue}
+\_def\_subtitfont{\_typosize[20/30]\_bf}
+\_def\_secfont{\_typosize[25/30]\_bf \Blue}
+
+\_nonum \_notoc \_let\_resetnonumnotoc=\_relax
+\_def\_printsec#1{\_par
+   \_abovetitle{\_penalty-400}\_bigskip
+   {\_secfont \_noindent \_leftskip=0pt plus1fill \_rightskip=\_leftskip
+     \_printrefnum[@\_quad]#1\_nbpar}\_insertmark{#1}%
+   \_nobreak \_belowtitle{\_medskip}%
+}
+
+   \_doc -----------------------------
+   When \`\slideshow` is active then each page is opened
+   by `\setbox\_slidepage=\vbox\bgroup` (roughly speaking)
+   and closed by `\egroup`. The material is
+   `\unvbox`ed and saved for the usage in the next usage if `\pg+` is in process.
+   The \`\_slidelayer` is incremented instead `\pageno` if `\pg+`.
+   This counter is equal to `\count1`, so it is printed to the terminal and
+   log file next to `\pageno`.
+
+   The code is somewhat more complicated when \^`\layers` is used. Then
+   `<layered-text>` is saved to the \`\_layertext` macro, the material before
+   it is in \`\_slidepage` box and the material after it is in `\_slidepageB`
+   box. The pages are completed in the `\loop` which increments the
+   \`\layernum` register.
+   \_cod -----------------------------
+
+\_newbox\_slidepage  \_newbox\_slidepageB
+\_countdef\_slidelayer=1
+
+\_def\_slideshow{\_slidelayer=1 \_slideshowactive
+   \_let\slideopen=\_relax  % first wins
+   \_setbox\_slidepage=\_vbox\_bgroup\_bgroup}
+
+\_def\_slideshowactive{%
+   \_sdef{_spg:;}{\_closepage \_global\_slidelayer=1 \_resetpage \_openslide}
+   \_sdef{_spg:.}{\_closepage \_endslides}
+   \_sdef{_spg:+}{\_closepage \_incr\_slidelayer \_decr\_pageno \_openslide}
+   \_let\_layers=\_layersactive
+   \_destboxslide % to prevent hyperlink-dests duplication
+}
+\_def\_destboxslide{\_def\_destbox[##1:##2]{\_isequal{##1}{ref}\_iffalse \_destboxori[##1:##2]\_fi}}
+
+\_def\_openslide{\_setbox\_slidepage=\_vbox\_bgroup\_bgroup \_setilevel
+   \_ifvoid\_slidepage \_else \_unvbox\_slidepage \_nointerlineskip\_lastbox \_fi}
+\_def\_setilevel{\_loop \_decr\_gilevel \_ifnum\_gilevel<0 \_else \_begitems \_repeat}
+
+\_def\_closepage{\_egroups \_egroup
+   \_ifnum \_maxlayers=0 \_unvcopy\_slidepage \_vfil\_break
+   \_else \_begingroup \_setwarnslides \_layernum=0
+      \_loop
+         \_ifnum\_layernum<\_maxlayers \_advance\_layernum by1
+            \_printlayers \_vfil\_break
+            \_ifnum\_layernum<\_maxlayers \_incr\_slidelayer \_decr\_pageno \_fi
+      \_repeat
+      \_global\_maxlayers=0
+      \_incr\_layernum \_global\_setbox\_slidepage=\_vbox{\_printlayers}%
+      \_endgroup
+   \_fi}
+\_def\_resetpage{%
+   \_global\_setbox\_slidepage=\_box\_voidbox \_global\_setbox\_slidepageB=\_box\_voidbox
+   \_lfnotenumreset
+}
+\_def\_setwarnslides{%
+   \_def\pg##1{\_opwarning{\_string\pg##1 \_layersenv}\_def\pg####1{}}%
+   \_def\layers##1 {\_opwarning{\_string\layers\_space \_layersenv}\_def\layers####1{}}%
+}
+\_def\_layersenv{cannot be inside \_string\layers...\_string\endlayers, ignored}
+
+\_def\_printlayers{\_unvcopy\_slidepage \_nointerlineskip\_lastbox
+   \_layertext \_endgraf
+   \_ifdim\_prevdepth>-1000pt \_kern-\_prevdepth \_kern\_dp\_strutbox \_fi
+   \_vskip\_parskip
+   \_unvcopy\_slidepageB
+}
+\_let\_destboxori=\_destbox
+
+\_newcount\_layernum \_newcount\_maxlayers
+\_maxlayers=0
+
+\_long\_def\_layersactive #1 #2\endlayers{%
+   \_par\_penalty0\_egroup
+   \_gdef\_layertext{#2}%
+   \_global\_maxlayers=#1
+   \_setbox\_slidepageB=\_vbox\_bgroup
+}
+\_def\_slideopen{\_let\slideshow=\_relax % first wins
+   \_sdef{_spg:;}{\_egroups\_vfil\_break \_lfnotenumreset\_bgroup \_setilevel}
+   \_sdef{_spg:.}{\_egroups\_endslides}
+   \_sdef{_spg:+}{\_egroups\_bgroup \_setilevel}
+   \_bgroup
+}
+
+\_public \subtit \slideshow \slideopen \pg \wideformat \use \pshow \layernum ;
+
+   \_doc -----------------------------
+   Default \`\layers` `<num>` macro (when \^`\slideshow` is not activated) is simple.
+   It prints the `<layered-text>` with `\layernum=<num>+1` because we need the
+   result after last layer is processed.
+   \_cod -----------------------------
+
+\_def\_layers #1 {\_par\_layernum=\_numexpr#1+1\_relax}
+\_let\endlayers=\_relax
+
+\_def\layers{\_layers}
+
+   \_doc -----------------------------
+   We must to redefine \`\fnotenumpages` because the data from `.ref` file
+   are less usable for implementing such a feature: the
+   footnote should be in more layers repeatedly. But we can suppose that
+   each page starts by `\pg;` macro, so we can reset the footnote counter by
+   this macro.
+   \_cod -----------------------------
+
+\_def \_fnotenumpages {\_def\_fnotenum{\_the\_lfnotenum}\_pgfnotefalse
+   \_def\_lfnotenumreset{\_global\_lfnotenum=0 }}
+\_let \_lfnotenumreset=\_relax
+\_public \fnotenumpages ;
+
+\_endcode % ----------------------------------------------
+
+The user manual of \OpTeX/ slides are in `op-slides.tex` file.
+
+2021-03-10 \slideopen introduced, bug with colors in \setbox fixed
+2021-03-10 \ifmmode* added to \adef*
+2021-02-15 \_def\_decr removed
+2021-01-16 \layers at empty page raises error: problem fixed
+2020-03-19 slides introduced
diff --git a/Master/texmf-dist/tex/optex/base/styles.opm b/Master/texmf-dist/tex/optex/base/styles.opm
new file mode 100644
index 00000000000..534eb13663c
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/styles.opm
@@ -0,0 +1,120 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \report {Basic styles of OpTeX <2021-03-10>} % preloaded in format
+
+   \_doc -----------------------------
+   We define auxiliary macro first (used by the \^`\address` macro)
+   \nl
+   The `{`\`\boxlines` `<line-1><eol><line-2><eol>...<line-n><eol>}`
+   returns to the outer vertical mode a box with `<line-1>`, next box with
+   `<line-2>` etc. Each box has its natural width. This is reason why we cannot
+   use paragraph mode where each resulting box has the width `\hsize`.
+   The `<eol>` is set active and `\everypar` starts `\hbox{` and acive <eol>
+   closes this `\hbox` by `}`.
+   \_cod -----------------------------
+
+\_def\_boxlines{%
+   \_def\_boxlinesE{\_ifhmode\_egroup\_empty\_fi}%
+   \_def\_nl{\_boxlinesE}%
+   \_bgroup \_lccode`\~=`\^^M\_lowercase{\_egroup\_let~}\_boxlinesE
+   \_everypar{\_setbox0=\_lastbox\_endgraf
+      \_hbox\_bgroup \_catcode`\^^M=13 \_let\par=\_nl \_aftergroup\_boxlinesC}%
+}
+\_def\_boxlinesC{\_futurelet\_next\_boxlinesD}
+\_def\_boxlinesD{\_ifx\_next\_empty\_else\_ea\_egroup\_fi}
+
+\_public \boxlines ;
+
+   \_doc -----------------------------
+   The \`\report` and \`\letter` style initialization macros are defined here.
+   \nl
+   The `\letter` defines \`\address` and \`\subject` macros.
+   \_cod -----------------------------
+
+\_def\_report{
+   \_typosize[11/13.2]
+   \_vsize=\_dimexpr \_topskip + 52\_baselineskip \_relax % added 2020-03-28
+   \_let\_titfont=\_chapfont
+   \_titskip=3ex
+   \_eoldef\_author##1{\_removelastskip\_bigskip
+      {\_leftskip=0pt plus1fill \_rightskip=\_leftskip \_it \_noindent ##1\_par}\_nobreak\_bigskip
+   }
+   \_public \author ;
+   \_parindent=1.2em \_iindent=\_parindent \_ttindent=\_parindent
+   \_footline={\_global\_footline={\_hss\_rmfixed\_folio\_hss}}
+}
+\_def\_letter{
+   \_def\_address{\_vtop\_bgroup\_boxlines \_parskip=0pt \_let\par=\_egroup}
+   \_def\_subject{{\_bf \_mtext{subj}: }}
+   \_public \address \subject ;
+   \_typosize[11/14]
+   \_vsize=\_dimexpr \_topskip + 49\_baselineskip \_relax % added 2020-03-28
+   \_parindent=0pt
+   \_parskip=\_medskipamount
+   \_nopagenumbers
+}
+\_public \letter \report ;
+
+   \_doc -----------------------------
+   The \`\slides` macro reads macro file `slides.opm`, see the section~\ref[slides].
+   \_cod -----------------------------
+
+\_def\_slides{\_par
+  \_opinput{slides.opm}
+  \_adef*{\_relax\_ifmmode*\_else\_ea\_startitem\_fi}
+}
+\_public \slides ;
+
+
+\_endcode % -------------------------------------
+
+The example of `\letter` style document follows:
+
+\begtt %-----------------------------------------------------------------
+
+\letter
+\fontfam[bonum]
+\chyph
+
+\address
+  Vážený pan
+  Mgr. Bořek Byrokrat
+  ředitel Ústavu pro další možnosti
+  Úřední 789
+  123 45 Praha 1
+
+\hfill V Praze dne \today
+
+\subject Žádost o možnost další možnosti
+
+Vážený pane řediteli
+
+na základě Vašeho dopisu č.j.~123456/78-dat a elektronické výzvy si dovoluji
+Vás požádat o prozkoumání mé možnosti další možnosti.
+Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
+eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
+veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
+commodo consequat.
+
+Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
+eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
+veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
+commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit
+esse cillum dolore eu fugiat nulla pariatur.
+
+S úctou
+
+\hfill \address
+  {\it Petr Olšák}
+  specialista na \TeX{}
+  Ulice 12345
+  Praha 13
+
+\bye
+
+\endtt %---------------------------------------------------------------------
+
+\endinput
+
+2021-03-10 \ifmmode* added to \adef*
+2020-03-28 released
diff --git a/Master/texmf-dist/tex/optex/base/table.opm b/Master/texmf-dist/tex/optex/base/table.opm
new file mode 100644
index 00000000000..a4a6511958e
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/table.opm
@@ -0,0 +1,526 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \table {Basic macros for OpTeX <2021-03-09>} % preloaded in format
+
+   \_doc -----------------------------
+   The result of the \`\table``{<declaration>}{<data>}` macro is inserted into
+   \`\_tablebox`. You can change default value if you want by
+   `\let\_tablebox=\vtop` or `\let\_tablebox=\relax`.
+   \_cod -----------------------------
+
+\_let\_tablebox=\_vbox
+
+   \_doc -----------------------------
+   We save the `to<size>` or `pxto<size>` to `#1` and \`\_tableW` sets the
+   `to<size>` to the \`\_tablew` macro.
+   If `pxto<size>` is used then `\_tablew` is empty and `\_tmpdim` includes
+   given <size>. The `\_ifpxto` returns true in this case.
+
+   The `\table` continues by reading `{<declaration>}` in the \^`\_tableA` macro.
+   Catcodes (for example the `|` character) have to be normal when reading
+   `\table` parameters. This is the reason why we use `\catcodetable` here.
+   \_cod -----------------------------
+
+\_newifi \_ifpxto
+\_def\_table#1#{\_tablebox\_bgroup \_tableW#1\_empty\_end
+   \_bgroup \_catcodetable\_optexcatcodes \_tableA}
+\_def\_tableW#1#2\_end{\_pxtofalse
+   \_ifx#1\_empty \_def\_tablew{}\_else
+   \_ifx#1p \_def\_tablew{}\_tableWx#2\_end \_else \_def\_tablew{#1#2}\_fi\_fi}
+\_def\_tableWx xto#1\_end{\_tmpdim=#1\_relax \_pxtotrue}
+\_public \table ;
+
+   \_doc -----------------------------
+   The \^`\tablinespace` is implemented by enlarging given \^`\tabstrut`
+   by desired dimension (height and depth too) and by setting
+   `\_lineskip=-2\_tablinespace`. Normal table rows (where no `\hrule` is
+   between them) have normal baseline distance.\nl
+   The \`\_tableA``{<declaration>}` macro scans the `<declaration>` by
+   `\_scantabdata#1\_relax` and continues by processing `{<data>}` by \^`\_tableB`.
+   The trick `\_tmptoks={<data>}\_edef\_tmpb{\_the\_tmptoks}`
+   is used here in order to keep the hash marks in the <data> unchanged.
+   \_cod -----------------------------
+
+\_def\_tableA#1{\_egroup
+   \_the\_thistable \_global\_thistable={}%
+   \_ea\_ifx\_ea^\_the\_tabstrut^\_setbox\_tstrutbox=\_null
+   \_else \_setbox\_tstrutbox=\_hbox{\_the\_tabstrut}%
+          \_setbox\_tstrutbox=\_hbox{\_vrule width\_zo
+              height\_dimexpr\_ht\_tstrutbox+\_tablinespace
+              depth\_dimexpr\_dp\_tstrutbox+\_tablinespace}%
+          \_offinterlineskip
+          \_lineskip=-2\_tablinespace
+   \_fi
+   \_colnum=0 \_let\_addtabitem=\_addtabitemx
+   \_def\_tmpa{}\_tabdata={\_colnum1\_relax}\_scantabdata#1\_relax
+   \_the\_everytable \_bgroup \_catcode`\#=12 \_tableB
+}
+
+   \_doc -----------------------------
+   The \`\_tableB` saves `<data>` to `\_tmpb`
+   and does four \^`\replstring`s to prefix each macro \^`\crl` (etc.)
+   by `\_crcr`. The reason is: we want to use macros that scan its parameter
+   to the delimiter written in the right part of the table item declaration.
+   See \^`\fS` for example. The `\crcr` cannot be hidden in another macro in this case.
+
+   The `\tabskip` value is saved for places between columns
+   into the \`\_tabskipmid` macro. Then it runs
+   \begtt \catcode`\<=13
+   \tabskip=\tabskipl \halign{<converted declaration>\tabskip=\tabskipr \cr <data>\crcr}
+   \endtt
+   This sets the desired boundary values of `\tabskip`. The
+   \"between-columns" values are set as `\tabskip=`\^`\_tabskipmid` in the
+   `<converted declaration>` immediately after each column declarator.
+
+   If `pxto` keyword was used, then we set the virtual unit \^`\tsize` to
+   `\hsize` first. Then the first attempt of the table is created in box 0.
+   Then the \^`\tsize` is re-calculated using `\wd0` and the real table is
+   printed by `\halign` in the second pass.
+
+   If no `pxto` keyword was used, then we print the table using `\halign`
+   directly. The \^`\_tablew` macro is nonempty if the `to` keyword was used.
+
+   Because the color selector with `\aftergroup` can be used inside the
+   table item, we must create the second real group for each table item.
+   This is reason why we start `<converted declaration>` by `\bgroup` and we
+   end it by `\egroup` in the \`\_tableC` macro. Each `&` character
+   is stored as `\egroup&\bgroup` in `<converted declaration>`. The
+   `\halign\_tablew\_tableC` really does:
+   \begtt \catcode`\<=13
+   \halign\_tablew{\bgroup<converted declaration>\egroup\tabskip=\tabskipr \cr<data>\crcr}
+   \endtt
+   \relax
+   The <data> are re-tokenized by `\_scantextokens` in order to be more
+   robust to catcode changing inside the <data>. But inline verbatim cannot
+   work in special cases here like \code{`\{`} for example.
+   \_cod -----------------------------
+
+\_long\_def\_tableB #1{\_egroup \_def\_tmpb{#1}%
+   \_replstring\_tmpb{\crl}{\_crcr\crl}\_replstring\_tmpb{\crll}{\_crcr\crll}%
+   \_replstring\_tmpb{\crli}{\_crcr\crli}\_replstring\_tmpb{\crlli}{\_crcr\crlli}%
+   \_replstring\_tmpb{\crlp}{\_crcr\crlp}%
+   \_edef\_tabskipmid{\_the\_tabskip}\_tabskip=\_tabskipl
+   \_ifpxto
+      \_tsize=\_hsize \_setbox0 = \_vbox{\_tablepxpreset \_halign \_tableC}%
+      \_tsize=\_dimexpr\_hsize-(\_wd0-\_tmpdim)\_relax
+      \_setbox0=\_null \_halign \_tableC
+   \_else
+      \_halign\_tablew \_tableC
+   \_fi \_egroup
+}
+\_def\_tableC{\_ea{\_ea\_bgroup\_the\_tabdata\_egroup\_tabskip=\_tabskipr\_cr
+   \_scantextokens\_ea{\_tmpb\_crcr}}}
+
+\_def\_tablepxpreset{} % can be used to de-activate references to .ref file
+\_newbox\_tstrutbox    % strut used in table rows
+\_newtoks\_tabdata     % the \halign declaration line
+
+   \_doc -----------------------------
+   The \`\_scantabdata` macro converts `\table`'s `<declaration>` to
+   `\halign` `<converted declaration>`.
+   The result is stored into \`\_tabdata` tokens list.
+   For example, the
+   following result is generated when `<declaration>=|cr||cl|`.
+   \begtt
+   tabdata: \_vrule\_the\_tabiteml\_hfil#\_unsskip\_hfil\_the\_tabitemr\_tabstrutA
+      &\_the\_tabiteml\_hfil#\_unsskip\_the\_tabitemr
+                                             \_vrule\_kern\_vvkern\_vrule\_tabstrutA
+      &\_the\_tabiteml\_hfil#\_unsskip\_hfil\_the\_tabitemr\_tabstrutA
+      &\_the\_tabiteml#\_unsskip\_hfil\_the\_tabitemr\_vrule\_tabstrutA
+   ddlinedata: &\_dditem &\_dditem\_vvitem &\_dditem &\_dditem
+   \endtt
+   The second result in the \`\_ddlinedata` macro is a template of one row of the table
+   used by \^`\crli` macro.
+   \_cod -----------------------------
+
+\_def\_scantabdata#1{\_let\_next=\_scantabdata
+   \_ifx\_relax#1\_let\_next=\_relax
+   \_else\_ifx|#1\_addtabvrule
+       \_else\_ifx(#1\_def\_next{\_scantabdataE}%
+           \_else\_ifx:#1\_def\_next{\_scantabdataF}%
+               \_else\_isinlist{123456789}#1\_iftrue \_def\_next{\_scantabdataC#1}%
+                   \_else \_ea\_ifx\_csname _tabdeclare#1\_endcsname \_relax
+                       \_ea\_ifx\_csname _paramtabdeclare#1\_endcsname \_relax
+                          \_opwarning{tab-declarator "#1" unknown, ignored}%
+                       \_else
+                          \_def\_next{\_ea\_scantabdataB\_csname _paramtabdeclare#1\_endcsname}\_fi
+                       \_else \_def\_next{\_ea\_scantabdataA\_csname _tabdeclare#1\_endcsname}%
+   \_fi\_fi\_fi\_fi\_fi\_fi \_next
+}
+\_def\_scantabdataA#1{\_addtabitem
+   \_ea\_addtabdata\_ea{#1\_tabstrutA \_tabskip\_tabskipmid\_relax}\_scantabdata}
+\_def\_scantabdataB#1#2{\_addtabitem
+   \_ea\_addtabdata\_ea{#1{#2}\_tabstrutA \_tabskip\_tabskipmid\_relax}\_scantabdata}
+\_def\_scantabdataC {\_def\_tmpb{}\_afterassignment\_scantabdataD \_tmpnum=}
+\_def\_scantabdataD#1{\_loop \_ifnum\_tmpnum>0 \_advance\_tmpnum by-1 \_addto\_tmpb{#1}\_repeat
+   \_ea\_scantabdata\_tmpb}
+\_def\_scantabdataE#1){\_addtabdata{#1}\_scantabdata}
+\_def\_scantabdataF {\_addtabitem\_def\_addtabitem{\_let\_addtabitem=\_addtabitemx}\_scantabdata}
+
+   \_doc -----------------------------
+   The \`\_addtabitemx` adds the boundary code (used between columns)
+   to the <converted declaration>. This code is
+   `\egroup &\bgroup \colnum=<value>\relax`. You can get the current number of
+   column from the \`\colnum` register, but you cannot write
+   `\the\colnum` as the first object in a <data> item because `\halign`
+   first expands the front of the item and the left part of the declaration
+   is processed after this. Use `\relax\the\colnum` instead. Or you can
+   write:
+   \begtt
+   \def\showcolnum{\ea\def\ea\totcolnum\ea{\the\colnum}\the\colnum/\totcolnum}
+   \table{ccc}{\showcolnum & \showcolnum & \showcolnum}
+   \endtt
+   This example prints 1/3 \ 2/3 \ 3/3, because the value of the `\colnum` is
+   equal to the total number of columns before left part of the column declaration
+   is processed.
+   \_cod -----------------------------
+
+\_newcount\_colnum     % number of current column in the table
+\_public \colnum ;
+
+\_def\_addtabitemx{\_ifnum\_colnum>0
+   \_addtabdata{\_egroup &\_bgroup}\_addto\_ddlinedata{&\_dditem}\_fi
+   \_advance\_colnum by1 \_let\_tmpa=\_relax
+   \_ifnum\_colnum>1 \_ea\_addtabdata\_ea{\_ea\_colnum\_the\_colnum\_relax}\_fi}
+\_def\_addtabdata#1{\_tabdata\_ea{\_the\_tabdata#1}}
+
+   \_doc -----------------------------
+   This code converts `||` or `|` from `\table` <declaration> to the <converted declaration>.
+   \_cod -----------------------------
+
+\_def\_addtabvrule{%
+    \_ifx\_tmpa\_vrule \_addtabdata{\_kern\_vvkern}%
+       \_ifnum\_colnum=0 \_addto\_vvleft{\_vvitem}\_else\_addto\_ddlinedata{\_vvitem}\_fi
+    \_else \_ifnum\_colnum=0 \_addto\_vvleft{\_vvitemA}\_else\_addto\_ddlinedata{\_vvitemA}\_fi\_fi
+    \_let\_tmpa=\_vrule \_addtabdata{\_vrule}%
+}
+\_def\_tabstrutA{\_copy\_tstrutbox}
+\_def\_vvleft{}
+\_def\_ddlinedata{}
+
+   \_doc -----------------------------
+   The default \"declaration letters" `c`, `l`, `r` and `p` are declared
+   by setting \`\_tabdeclarec`, \`\_tabdeclarel`, \`\_tabdeclarer` and
+   \`\_paramtabdeclarep` macros. In general, define
+   `\def\_tabdeclare<letter>{...}` for a non-parametric
+   letter and `\def\_paramtabdeclare<letter>{...}` for a letter with a parameter.
+   The double hash `##` must be in the definition, it is replaced by a real table item data.
+   You can declare more such \"declaration letters" if you want.
+   \_cod -----------------------------
+
+\_def\_tabdeclarec{\_the\_tabiteml\_hfil##\_unsskip\_hfil\_the\_tabitemr}
+\_def\_tabdeclarel{\_the\_tabiteml\_relax##\_unsskip\_hfil\_the\_tabitemr}
+\_def\_tabdeclarer{\_the\_tabiteml\_hfil##\_unsskip\_the\_tabitemr}
+\_def\_paramtabdeclarep#1{\_the\_tabiteml
+   \_vtop{\_hsize=#1\_relax \_baselineskip=\_normalbaselineskip
+   \_lineskiplimit=\_zo \_noindent##\_unsskip
+   \_ifvmode\_vskip\_dp\_tstrutbox \_else\_lower\_dp\_tstrutbox\_hbox{}\_fi}\_the\_tabitemr}
+
+   \_doc -----------------------------
+   Users put optional spaces around the table item typically, i.e.\ they write
+   `& text &` instead `&text&`. The left space is ignored by the internal \TeX/ algorithm but
+   the right space must be removed by macros. This is a reason why we recommend to
+   use \`\_unsskip` after each `##` in your definition of \"declaration letters".
+   This macro isn't only the primitive `\unskip` because we allow usage of plain \TeX/
+   `\hideskip` macro: `&\hideskip text\hideskip&`.
+   \_cod -----------------------------
+
+\_def\_unsskip{\_ifmmode\_else\_ifdim\_lastskip>\_zo \_unskip\_fi\_fi}
+
+   \_doc -----------------------------
+   The \`\fL`, \`\fR`, \`\fC` and \`\fX` macros only do special parameters settings
+   for paragraph building algorithm. The \`\fS` prints the paragraph into
+   box 0 first, measures the number of lines by the `\prevgraf` primitive
+   and use (or don't use) `\hfil` (for centering) before the first line.
+   \_cod -----------------------------
+
+\_let\_fL=\_raggedright
+\_def\_fR{\_leftskip=0pt plus 1fill \_relax}
+\_def\_fC{\_leftskip=0pt plus1fill \_rightskip=0pt plus 1fill \_relax}
+\_def\_fX{\_leftskip=0pt plus1fil  \_rightskip=0pt plus-1fil \_parfillskip=0pt plus2fil \_relax}
+\_long\_def\_fS #1\_unsskip{\_noindent \_setbox0 =\_vbox{\_noindent #1\_endgraf \_ea}%
+   \_ifnum\_prevgraf=1 \_hfil \_fi #1\_unsskip
+}
+\_public \fL \fR \fC \fX \fS ;
+
+   \_doc -----------------------------
+   The family of `\_cr*` macros
+   \`\crl`, \`\crll`, \`\crli`, \`\crlli`, \`\crlp` and
+   \`\tskip` `<dimen>` is implemented here.
+   The \`\_zerotabrule` is used to suppress the negative `\lineskip`
+   declared by \^`\tablinespace`.
+   \_cod -----------------------------
+
+\_def\_crl{\_crcr\_noalign{\_hrule}}
+\_def\_crll{\_crcr\_noalign{\_hrule\_kern\_hhkern\_hrule}}
+\_def\_zerotabrule {\_noalign{\_hrule height\_zo width\_zo depth\_zo}}
+
+\_def\_crli{\_crcr \_zerotabrule \_omit
+   \_gdef\_dditem{\_omit\_tablinefil}\_gdef\_vvitem{\_kern\_vvkern\_vrule}\_gdef\_vvitemA{\_vrule}%
+   \_vvleft\_tablinefil\_ddlinedata\_crcr \_zerotabrule}
+\_def\_crlli{\_crli\_noalign{\_kern\_hhkern}\_crli}
+\_def\_tablinefil{\_leaders\_hrule\_hfil}
+
+\_def\_crlp#1{\_crcr \_zerotabrule \_noalign{\_kern-\_drulewidth}%
+   \_omit \_xdef\_crlplist{#1}\_xdef\_crlplist{,\_ea}\_ea\_crlpA\_crlplist,\_end,%
+   \_global\_tmpnum=0 \_gdef\_dditem{\_omit\_crlpD}%
+   \_gdef\_vvitem{\_kern\_vvkern\_kern\_drulewidth}\_gdef\_vvitemA{\_kern\_drulewidth}%
+   \_vvleft\_crlpD\_ddlinedata \_global\_tmpnum=0 \_crcr \_zerotabrule}
+\_def\_crlpA#1,{\_ifx\_end#1\_else \_crlpB#1-\_end,\_ea\_crlpA\_fi}
+\_def\_crlpB#1#2-#3,{\_ifx\_end#3\_xdef\_crlplist{\_crlplist#1#2,}\_else\_crlpC#1#2-#3,\_fi}
+\_def\_crlpC#1-#2-#3,{\_tmpnum=#1\_relax
+   \_loop \_xdef\_crlplist{\_crlplist\_the\_tmpnum,}\_ifnum\_tmpnum<#2\_advance\_tmpnum by1 \_repeat}
+\_def\_crlpD{\_incr\_tmpnum \_edef\_tmpa{\_noexpand\_isinlist\_noexpand\_crlplist{,\_the\_tmpnum,}}%
+   \_tmpa\_iftrue \_kern-\_drulewidth \_tablinefil \_kern-\_drulewidth\_else\_hfil \_fi}
+
+\_def\_tskip{\_afterassignment\_tskipA \_tmpdim}
+\_def\_tskipA{\_gdef\_dditem{}\_gdef\_vvitem{}\_gdef\_vvitemA{}\_gdef\_tabstrutA{}%
+    \_vbox to\_tmpdim{}\_ddlinedata \_crcr
+    \_zerotabrule \_noalign{\_gdef\_tabstrutA{\_copy\_tstrutbox}}}
+
+\_public \crl \crll \crli \crlli \crlp \tskip ;
+
+   \_doc -----------------------------
+   The \`\mspan``{<number>}[<declaration>]{<text>}` macro generates similar `\omit\span\omit\span`
+   sequence as plain \TeX/ macro `\multispan`. Moreover, it uses \^`\_scantabdata` to
+   convert `<declaration>` from `\table` syntax to `\halign` syntax.
+   \_cod -----------------------------
+
+\_def\_mspan{\_omit \_afterassignment\_mspanA \_mscount=}
+\_def\_mspanA[#1]#2{\_loop \_ifnum\_mscount>1 \_cs{_span}\_omit \_advance\_mscount-1 \_repeat
+   \_count1=\_colnum \_colnum=0 \_def\_tmpa{}\_tabdata={}\_scantabdata#1\_relax
+   \_colnum=\_count1 \_setbox0=\_vbox{\_halign\_ea{\_ea\_bgroup\_the\_tabdata\_egroup\_cr#2\_cr}%
+   \_global\_setbox8=\_lastbox}%
+   \_setbox0=\_hbox{\_unhbox8 \_unskip \_global\_setbox8=\_lastbox}%
+   \_unhbox8 \_ignorespaces}
+\_public \mspan ;
+
+   \_doc -----------------------------
+   The \`\vspan``<number>{<text>}` implementation is here.
+   We need to lower the box by
+   \begtt \catcode`\<=13
+   (<number>-1)*(\ht+\dp of \tabstrut) / 2.
+   \endtt
+   The `#1` parameter must be a one-digit number. If you want to set more digits
+   then use braces.
+   \_cod -----------------------------
+
+\_def\_vspan#1#2#{\_vspanA{#1#2}}
+\_def\_vspanA#1#2{\_vtop to\_zo{\_hbox{\_lower \_dimexpr
+   #1\_dimexpr(\_ht\_tstrutbox+\_dp\_tstrutbox)/2\_relax
+    -\_dimexpr(\_ht\_tstrutbox+\_dp\_tstrutbox)/2\_relax \_hbox{#2}}\_vss}}
+\_public \vspan ;
+
+   \_doc -----------------------------
+   The parameters of primitive `\vrule` and `\hrule` keeps the rule \"last wins".
+   If we re-define `\hrule` to `\_orihrule height1pt` then each usage
+   of redefined `\hrule` uses `1pt` height if this parameter isn't
+   overwritten by another following `height` parameter. This principle is used for
+   settings another default rule thickness than 0.4\,pt by the macro
+   \`\rulewidth`.
+   \_cod -----------------------------
+
+\_newdimen\_drulewidth  \_drulewidth=0.4pt
+\_let\_orihrule=\_hrule  \_let\_orivrule=\_vrule
+\_def\_rulewidth{\_afterassignment\_rulewidthA \_drulewidth}
+\_def\_rulewidthA{\_edef\_hrule{\_orihrule height\_drulewidth}%
+                  \_edef\_vrule{\_orivrule width\_drulewidth}%
+                  \_let\_rulewidth=\_drulewidth
+                  \_public \vrule \hrule \rulewidth;}
+\_public \rulewidth ;
+
+   \_doc -----------------------------
+   The \`\frame``{<text>}` uses \"\code{\\vbox} in \code{\\vtop}" trick in order to keep the
+   baseline of the internal text at the same level as outer baseline.
+   User can write `\frame{abcxyz}` in normal paragraph line, for example
+   and gets the expected result: \frame{abcxyz}.
+   The internal margins are set by `\vvkern` and `\hhkern` parameters.
+   \_cod -----------------------------
+
+\_long\_def\_frame#1{%
+   \_hbox{\_vrule\_vtop{\_vbox{\_hrule\_kern\_vvkern
+      \_hbox{\_kern\_hhkern\_relax#1\_kern\_hhkern}%
+   }\_kern\_vvkern\_hrule}\_vrule}}
+\_public \frame ;
+
+   \_doc -----------------------------
+   \`\eqbox` and \`\eqboxsize` are implemented here. The widths of
+   all `\eqbox`es are saved to the `.ref` file in the format
+   \`\_Xeqbox``{<label>}{<size>}`. The `.ref` file is read again and maximum
+   box width for each <label> is saved to `\_eqb:<label>`.
+   \_cod -----------------------------
+
+\_def\_Xeqbox#1#2{%
+   \_ifcsname _eqb:#1\_endcsname
+      \_ifdim #2>\_cs{_eqb:#1}\_relax \_sdef{_eqb:#1}{#2}\_fi
+   \_else \_sdef{_eqb:#1}{#2}\_fi
+}
+\_def\_eqbox #1[#2]#3{\_setbox0=\_hbox{{#3}}%
+   \_openref \_immediate\_wref \_Xeqbox{{#2}{\_the\_wd0}}%
+   \_ifcsname _eqb:#2\_endcsname
+       \_hbox to\_cs{_eqb:#2}{\_ifx r#1\_hfill\_fi\_hss\_unhbox0\_hss\_ifx l#1\_hfill\_fi}%
+   \_else \_box0 \_fi
+}
+\_def\_eqboxsize [#1]#2{\_trycs{_eqb:#1}{#2}}
+
+\public \eqbox \eqboxsize ;
+
+\_endcode % -------------------------------------
+
+\secc[table.bound] The boundary declarator \code{:}
+
+The `<declaration>` part of `\table{<declaration>}{<data>}` includes
+column declarators (letters) and other material: the `|` or `(<cmd>)`.
+If the boundary declarator `:` is not used then
+the boundaries of columns are just before each column declarator
+with exception of the first one.
+For example, the declaration  `{|c||c(xx)(yy)c}`
+should be written more exactly using the boundary declarator `:`
+by `{|c||:c(xx)(yy):c}`. But you can set these boundaries to
+other places using the boundary declarator~`:` explicitly,
+for example `{|c:||c(xx):(yy)c}`. The boundary declarator `:`
+can be used only once between each pair of column declarators.
+
+Each table item has its group. The `(<cmd>)` are parts of the given
+table item (depending on the boundary declarator position).
+If you want to apply a special setting for a given column, you can do this by
+`(<setting>)` followed by column declarator. But if the column is not
+first, you must use `:(<setting>)`. Example. We have three centered columns,
+the second one have to be in bold font and the third one have to be in red:
+`\table{c:(\bf)c:(\Red)c}{<data>}`
+
+\secc Usage of the \code{\\tabskip} primitive
+
+The value of `\tabskip` primitive is used between all columns of the table.
+It is glue-type, so it can be stretchable or shrinkable, see next
+section~\ref[table.w].
+
+By default, `\tabskip` is 0\,pt. It means that only \^`\tabiteml`,
+\^`\tabitemr` and `(<cmds>)` can generate visual spaces between columns. But they
+are not real spaces between columns because they are in fact the part of
+the total column width.
+
+The `\tabskip` value declared before the \^`\table` macro (or in
+\^`\everytable` or in \^`\thistable`) is used between all columns in the table.
+This value is equal to all spaces between columns. But you can set each such space
+individually if you use `(\tabskip=<value>)` in the <declaration> immediately
+before boundary character. The boundary character represents the column pair for
+which the `\tabskip` has individual value. For example
+`c(\tabskip=5pt):r` gives `\tabskip` value between `c` and `r` columns.
+You need not use boundary character explicitly, so `c(\tabskip=5pt)r` gives
+the same result.
+
+Space before the first column is given by the \^`\tabskipl`
+and space after the last column is equal to \^`\tabskipr`.
+Default values are 0\,pt.
+
+Use nonzero `\tabskip` only in special applications. If `\tabskip` is
+nonzero then horizontal lines generated by \^`\crli`, \^`\crlli` and \^`\crlp`
+have another behavior than you probably expected: they are interrupted in
+each `\tabskip` space.
+
+\secc[table.w] Tables to given width
+
+There are two possibilities how to create tables to given width:
+
+\begitems
+* `\table to<size>{<declaration>}{<data>}` uses stretchability or
+  shrinkability of all spaces between columns generated by `\tabskip` value and
+  eventually by \^`\tabskipl`, \^`\tabskipr` values. See example below.
+* `\table pxto<size>{<declaration>}{<data>}` expands the columns declared
+  by `p{<size>}`, if the `<size>` is given by a virtual \^`\tsize` unit.
+  See the example below.
+\enditems
+
+Example of `\table to<size>`:
+
+\begtt \catcode`\<=13
+\thistable{\tabskip=0pt plus1fil minus1fil}
+\table to\hsize {lr}{<data>}
+\endtt
+%
+This table has its width `\hsize`. The first column starts at the left boundary of
+this table and it is justified left (to the boundary). The second column ends at
+the right boundary of the table and it is justified right (to the boundary).
+The space between them is stretchable and shrinkable to reach
+the given width `\hsize`.
+
+\medskip
+Example of `\table pxto<size>` (means \"{\bf p}aragraphs e{\bf x}panded {\bf to}"):
+
+\begtt
+\table pxto\hsize {|c|p{\tsize}|}{\crl
+ aaa         & Ddkas jd dsjds ds cgha sfgs dd fddzf dfhz xxz
+               dras ffg hksd kds d sdjds h sd jd dsjds ds cgha
+               sfgs dd fddzf dfhz xxz. \crl
+ bb ddd ggg  & Dsjds ds cgha sfgs dd fddzf dfhz xxz
+               ddkas jd dsjds ds cgha sfgs dd fddzf. \crl }
+\endtt
+
+\noindent\table pxto\hsize {|c|p{\tsize}|}{\crl
+ aaa         & Ddkas jd dsjds ds cgha sfgs dd fddzf dfhz xxz
+               dras ffg hksd kds d sdjds h sd jd dsjds ds cgha
+               sfgs dd fddzf dfhz xxz. \crl
+ bb ddd ggg  & Dsjds ds cgha sfgs dd fddzf dfhz xxz
+               ddkas jd dsjds ds cgha sfgs dd fddzf. \crl }
+\medskip
+
+The first `c` column is variable width (it gets the width of the most wide item)
+and the resting space to given `\hsize` is filled by the `p` column.
+
+You can declare more than one `p{<coefficient>\tsize}` columns in the table
+when `pxto` keyword is used. The total sum of <coefficinets> must be exactly one.
+For example,
+
+\begtt \catcode`\<=13
+\table pxto13cm {r p{.3\tsize} p{.5\tsize} p{.2\tsize} l}{<data>}
+\endtt
+%
+This gives the ratio of widths of individual paragraphs in the table.
+
+\secc `\eqbox`: boxes with equal width across the whole document
+
+The \^`\eqbox` `[<label>]{<text>}` behaves like `\hbox{<text>}` in the first
+run of \TeX. But the widths of all boxes with the same label are saved to
+`.ref` file and the maximum box width for each label is calculated at the
+beginning of the next \TeX/ run. Then \^`\eqbox`~`[<label>]{<text>}` behaves
+like `\hbox to <dim:label> {\hss <text>\hss}`, where <dim:label> is
+the maximum width of all boxes
+labeled by the same `[<label>]`. The documentation of the \LaTeX/ package
+`eqparbox` includes more information and tips.
+
+The \^`\eqboxsize` `[<label>]{<dimen>}` expands to <dim:label> if this value is known,
+else it expands to the given <dimen>.
+
+The optional parameter `r` or `l` can be written before `[<label>]` (for example
+`\eqbox r[label]{text}`) if you want to put the text to the right or to the
+left side of the box width.
+
+Try the following example and watch what happens after first \TeX/ run and
+after the second one.
+
+\begtt
+\def\leftitem#1{\par
+   \noindent \hangindent=\eqboxsize[items]{2em}\hangafter=1
+   \eqbox r[items]{#1 }\ignorespaces}
+
+\leftitem {\bf first}      \lorem[1]
+\leftitem {\bf second one} \lorem[2]
+\leftitem {\bf final}      \lorem[3]
+\endtt
+
+
+\_endinput
+
+2021-03-09 \_tablepxpreset introduced
+2021-02-15 \_expandafter -> \_ea
+2021-01-27 \_tableB: \long\def added, \vspan syntax improved
+2020-05-26 \eqbox implemented
+2020-05-20 \colnum implemented.
+           \vspan implemented.
+2020-05-19 \fL, \fR ets defined.
+           \table to, \table pxto implemented.
+2020-05-10 \bgroup &\egroup added to tabdata (in order to \aftergroup from colors)
+           boundary declarator : introduced
+           \_unsskip: \ifmmode added.
+2020-04-10 second group for items in order to \localcolors
diff --git a/Master/texmf-dist/tex/optex/base/uni-lcuc.opm b/Master/texmf-dist/tex/optex/base/uni-lcuc.opm
new file mode 100644
index 00000000000..2a99f52d66a
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/uni-lcuc.opm
@@ -0,0 +1,15944 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+% Preloaded in format. A copy o uni-lcuc.tex fom csplain is here:
+
+% uni-lcuc.tex -- sets \lccodes and \uccodes for Unicode chars, nothing more
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Petr Olsak,  Jul. 2014
+
+\_wterm{Setting lccodes and uccodes for Unicode characters}
+
+\_def\_tmp #1 #2 {\_ifx^#1^\_else
+   \_lccode"#1="#1
+   \_ifx.#2%
+      \_uccode"#1="#1
+   \_else
+      \_uccode"#2="#2
+      \_lccode"#2="#1
+      \_uccode"#1="#2
+   \_fi
+   \_ea \_tmp \_fi
+}
+\_tmp
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+A92D .
+A947 .
+A948 .
+A949 .
+A94A .
+A94B .
+A94C .
+A94D .
+A94E .
+A94F .
+A950 .
+A951 .
+A952 .
+A953 .
+A980 .
+A981 .
+A982 .
+A983 .
+A9B3 .
+A9B4 .
+A9B5 .
+A9B6 .
+A9B7 .
+A9B8 .
+A9B9 .
+A9BA .
+A9BB .
+A9BC .
+A9BD .
+A9BE .
+A9BF .
+A9C0 .
+AA29 .
+AA2A .
+AA2B .
+AA2C .
+AA2D .
+AA2E .
+AA2F .
+AA30 .
+AA31 .
+AA32 .
+AA33 .
+AA34 .
+AA35 .
+AA36 .
+AA43 .
+AA4C .
+AA4D .
+AA7B .
+AAB0 .
+AAB2 .
+AAB3 .
+AAB4 .
+AAB7 .
+AAB8 .
+AABE .
+AABF .
+AAC1 .
+AAEB .
+AAEC .
+AAED .
+AAEE .
+AAEF .
+AAF5 .
+AAF6 .
+ABE3 .
+ABE4 .
+ABE5 .
+ABE6 .
+ABE7 .
+ABE8 .
+ABE9 .
+ABEA .
+ABEC .
+ABED .
+FB1E .
+FE00 .
+FE01 .
+FE02 .
+FE03 .
+FE04 .
+FE05 .
+FE06 .
+FE07 .
+FE08 .
+FE09 .
+FE0A .
+FE0B .
+FE0C .
+FE0D .
+FE0E .
+FE0F .
+FE20 .
+FE21 .
+FE22 .
+FE23 .
+FE24 .
+FE25 .
+FE26 .
+101FD .
+10A01 .
+10A02 .
+10A03 .
+10A05 .
+10A06 .
+10A0C .
+10A0D .
+10A0E .
+10A0F .
+10A38 .
+10A39 .
+10A3A .
+10A3F .
+11000 .
+11001 .
+11002 .
+11038 .
+11039 .
+1103A .
+1103B .
+1103C .
+1103D .
+1103E .
+1103F .
+11040 .
+11041 .
+11042 .
+11043 .
+11044 .
+11045 .
+11046 .
+11080 .
+11081 .
+11082 .
+110B0 .
+110B1 .
+110B2 .
+110B3 .
+110B4 .
+110B5 .
+110B6 .
+110B7 .
+110B8 .
+110B9 .
+110BA .
+11100 .
+11101 .
+11102 .
+11127 .
+11128 .
+11129 .
+1112A .
+1112B .
+1112C .
+1112D .
+1112E .
+1112F .
+11130 .
+11131 .
+11132 .
+11133 .
+11134 .
+11180 .
+11181 .
+11182 .
+111B3 .
+111B4 .
+111B5 .
+111B6 .
+111B7 .
+111B8 .
+111B9 .
+111BA .
+111BB .
+111BC .
+111BD .
+111BE .
+111BF .
+111C0 .
+116AB .
+116AC .
+116AD .
+116AE .
+116AF .
+116B0 .
+116B1 .
+116B2 .
+116B3 .
+116B4 .
+116B5 .
+116B6 .
+116B7 .
+16F51 .
+16F52 .
+16F53 .
+16F54 .
+16F55 .
+16F56 .
+16F57 .
+16F58 .
+16F59 .
+16F5A .
+16F5B .
+16F5C .
+16F5D .
+16F5E .
+16F5F .
+16F60 .
+16F61 .
+16F62 .
+16F63 .
+16F64 .
+16F65 .
+16F66 .
+16F67 .
+16F68 .
+16F69 .
+16F6A .
+16F6B .
+16F6C .
+16F6D .
+16F6E .
+16F6F .
+16F70 .
+16F71 .
+16F72 .
+16F73 .
+16F74 .
+16F75 .
+16F76 .
+16F77 .
+16F78 .
+16F79 .
+16F7A .
+16F7B .
+16F7C .
+16F7D .
+16F7E .
+16F8F .
+16F90 .
+16F91 .
+16F92 .
+1D165 .
+1D166 .
+1D167 .
+1D168 .
+1D169 .
+1D16D .
+1D16E .
+1D16F .
+1D170 .
+1D171 .
+1D172 .
+1D17B .
+1D17C .
+1D17D .
+1D17E .
+1D17F .
+1D180 .
+1D181 .
+1D182 .
+1D185 .
+1D186 .
+1D187 .
+1D188 .
+1D189 .
+1D18A .
+1D18B .
+1D1AA .
+1D1AB .
+1D1AC .
+1D1AD .
+1D242 .
+1D243 .
+1D244 .
+E0100 .
+E0101 .
+E0102 .
+E0103 .
+E0104 .
+E0105 .
+E0106 .
+E0107 .
+E0108 .
+E0109 .
+E010A .
+E010B .
+E010C .
+E010D .
+E010E .
+E010F .
+E0110 .
+E0111 .
+E0112 .
+E0113 .
+E0114 .
+E0115 .
+E0116 .
+E0117 .
+E0118 .
+E0119 .
+E011A .
+E011B .
+E011C .
+E011D .
+E011E .
+E011F .
+E0120 .
+E0121 .
+E0122 .
+E0123 .
+E0124 .
+E0125 .
+E0126 .
+E0127 .
+E0128 .
+E0129 .
+E012A .
+E012B .
+E012C .
+E012D .
+E012E .
+E012F .
+E0130 .
+E0131 .
+E0132 .
+E0133 .
+E0134 .
+E0135 .
+E0136 .
+E0137 .
+E0138 .
+E0139 .
+E013A .
+E013B .
+E013C .
+E013D .
+E013E .
+E013F .
+E0140 .
+E0141 .
+E0142 .
+E0143 .
+E0144 .
+E0145 .
+E0146 .
+E0147 .
+E0148 .
+E0149 .
+E014A .
+E014B .
+E014C .
+E014D .
+E014E .
+E014F .
+E0150 .
+E0151 .
+E0152 .
+E0153 .
+E0154 .
+E0155 .
+E0156 .
+E0157 .
+E0158 .
+E0159 .
+E015A .
+E015B .
+E015C .
+E015D .
+E015E .
+E015F .
+E0160 .
+E0161 .
+E0162 .
+E0163 .
+E0164 .
+E0165 .
+E0166 .
+E0167 .
+E0168 .
+E0169 .
+E016A .
+E016B .
+E016C .
+E016D .
+E016E .
+E016F .
+E0170 .
+E0171 .
+E0172 .
+E0173 .
+E0174 .
+E0175 .
+E0176 .
+E0177 .
+E0178 .
+E0179 .
+E017A .
+E017B .
+E017C .
+E017D .
+E017E .
+E017F .
+E0180 .
+E0181 .
+E0182 .
+E0183 .
+E0184 .
+E0185 .
+E0186 .
+E0187 .
+E0188 .
+E0189 .
+E018A .
+E018B .
+E018C .
+E018D .
+E018E .
+E018F .
+E0190 .
+E0191 .
+E0192 .
+E0193 .
+E0194 .
+E0195 .
+E0196 .
+E0197 .
+E0198 .
+E0199 .
+E019A .
+E019B .
+E019C .
+E019D .
+E019E .
+E019F .
+E01A0 .
+E01A1 .
+E01A2 .
+E01A3 .
+E01A4 .
+E01A5 .
+E01A6 .
+E01A7 .
+E01A8 .
+E01A9 .
+E01AA .
+E01AB .
+E01AC .
+E01AD .
+E01AE .
+E01AF .
+E01B0 .
+E01B1 .
+E01B2 .
+E01B3 .
+E01B4 .
+E01B5 .
+E01B6 .
+E01B7 .
+E01B8 .
+E01B9 .
+E01BA .
+E01BB .
+E01BC .
+E01BD .
+E01BE .
+E01BF .
+E01C0 .
+E01C1 .
+E01C2 .
+E01C3 .
+E01C4 .
+E01C5 .
+E01C6 .
+E01C7 .
+E01C8 .
+E01C9 .
+E01CA .
+E01CB .
+E01CC .
+E01CD .
+E01CE .
+E01CF .
+E01D0 .
+E01D1 .
+E01D2 .
+E01D3 .
+E01D4 .
+E01D5 .
+E01D6 .
+E01D7 .
+E01D8 .
+E01D9 .
+E01DA .
+E01DB .
+E01DC .
+E01DD .
+E01DE .
+E01DF .
+E01E0 .
+E01E1 .
+E01E2 .
+E01E3 .
+E01E4 .
+E01E5 .
+E01E6 .
+E01E7 .
+E01E8 .
+E01E9 .
+E01EA .
+E01EB .
+E01EC .
+E01ED .
+E01EE .
+E01EF .
+{} {} \_relax
+\_def\_tmp #1 #2 {\_lccode"#2="#1 \_uccode"#2="#2 }
+\_tmp 0069 0130
+\_tmp 03B8 03F4
+\_tmp 00DF 1E9E
+\_tmp 03C9 2126
+\_tmp 006B 212A
+\_tmp 00E5 212B
+\_def\_tmp #1 #2 {\_lccode"#1="#1 \_uccode"#1="#2 }
+\_tmp 0131 0049
+\_tmp 017F 0053
+\_tmp 03BC 039C
+\_tmp 03C2 03A3
+\_tmp 03D0 0392
+\_tmp 03D1 0398
+\_tmp 03D5 03A6
+\_tmp 03D6 03A0
+\_tmp 03F0 039A
+\_tmp 03F1 03A1
+\_tmp 03F5 0395
+\_tmp 1E9B 1E60
+\_tmp 1FBE 0399
+% end of file
+\_endcode
+
+All codes in unicode table keep information about pairs lowecase-uppercase
+letters or single letter. We need to read such information and set
+appropriate `\lccode` and `\uccode`. The `\catcode` above the code 127
+is not set, i.\,e.\ the `\catcode`=12 for all codes above 127.
+
+The file `uni-lcuc.opm` does this work. It is not much interesting file, only
+first few lines from 15928 lines in total is shown here.
+
+{\everytt={\typosize[8/10]\_let\_printverbline=\_printcodeline \medskip}\ttline=-1
+\def\docfile{uni-lcuc.opm}
+\verbinput (3-30) uni-lcuc.opm
+\vskip-\medskipamount
+\noindent\typosize[8/]\dots etc. (see {\tt\Brown\docfile})
+}
diff --git a/Master/texmf-dist/tex/optex/base/unimath-codes.opm b/Master/texmf-dist/tex/optex/base/unimath-codes.opm
new file mode 100644
index 00000000000..6e83ab94ad1
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/unimath-codes.opm
@@ -0,0 +1,439 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \_ncharrmA {Uni math codes <2021-03-11>} % preloaded on demand by \loadmath
+
+   \_doc -----------------------------
+   The control sequences for `\alpha`, `\beta` etc are redefined here.
+   The `\alpha` expands to the character with Unicode `"03B1`, this is a normal
+   character $α$. You can type it directly in your editor if you know how
+   to do this.
+   \_cod -----------------------------
+
+\_umathnumB="0391
+\_greekdef \Alpha \Beta \Gamma \Delta \Epsilon \Zeta \Eta \Theta \Iota \Kappa
+   \Lambda \Mu \Nu \Xi \Omicron \Pi \Rho \varTheta \Sigma \Tau \Upsilon \Phi
+   \Chi \Psi \Omega \_relax
+
+\_umathnumB="03B1
+\_greekdef \alpha \beta \gamma \delta \varepsilon \zeta \eta \theta \iota \kappa
+   \lambda \mu \nu \xi \omicron \pi \rho \varsigma \sigma \tau \upsilon
+   \varphi \chi \psi \omega \vardelta \epsilon \vartheta \varkappa \phi
+   \varrho \varpi \_relax
+
+   \_doc -----------------------------
+   The math alphabets are declared here using the
+   \^`\_umathrange {<range>}<class><family><starting-code>` macro.
+   \_cod -----------------------------
+
+\_chardef\_ncharrmA=`A       \_chardef\_ncharrma=`a
+\_chardef\_ncharbfA="1D400   \_chardef\_ncharbfa="1D41A
+\_chardef\_ncharitA="1D434   \_chardef\_ncharita="1D44E
+\_chardef\_ncharbiA="1D468   \_chardef\_ncharbia="1D482
+\_chardef\_ncharclA="1D49C   \_chardef\_ncharcla="1D4B6
+\_chardef\_ncharbcA="1D4D0   \_chardef\_ncharbca="1D4EA
+\_chardef\_ncharfrA="1D504   \_chardef\_ncharfra="1D51E
+\_chardef\_ncharbrA="1D56C   \_chardef\_ncharbra="1D586
+\_chardef\_ncharbbA="1D538   \_chardef\_ncharbba="1D552
+\_chardef\_ncharsnA="1D5A0   \_chardef\_ncharsna="1D5BA
+\_chardef\_ncharbsA="1D5D4   \_chardef\_ncharbsa="1D5EE
+\_chardef\_ncharsiA="1D608   \_chardef\_ncharsia="1D622
+\_chardef\_ncharsxA="1D63C   \_chardef\_ncharsxa="1D656
+\_chardef\_ncharttA="1D670   \_chardef\_nchartta="1D68A
+
+\_protected\_def\_rmvariables     {\_umathrange{A-Z}71\_ncharrmA \_umathrange{a-z}71\_ncharrma}
+\_protected\_def\_bfvariables     {\_umathrange{A-Z}71\_ncharbfA \_umathrange{a-z}71\_ncharbfa}
+\_protected\_def\_itvariables     {\_umathrange{A-Z}71\_ncharitA \_umathrange{a-z}71\_ncharita}
+\_protected\_def\_bivariables     {\_umathrange{A-Z}71\_ncharbiA \_umathrange{a-z}71\_ncharbia}
+\_protected\_def\_calvariables    {\_umathrange{A-Z}71\_ncharclA \_umathrange{a-z}71\_ncharcla}
+\_protected\_def\_bcalvariables   {\_umathrange{A-Z}71\_ncharbcA \_umathrange{a-z}71\_ncharbca}
+\_protected\_def\_frakvariables   {\_umathrange{A-Z}71\_ncharfrA \_umathrange{a-z}71\_ncharfra}
+\_protected\_def\_bfrakvariables  {\_umathrange{A-Z}71\_ncharbrA \_umathrange{a-z}71\_ncharbra}
+\_protected\_def\_bbvariables     {\_umathrange{A-Z}71\_ncharbbA \_umathrange{a-z}71\_ncharbba}
+\_protected\_def\_sansvariables   {\_umathrange{A-Z}71\_ncharsnA \_umathrange{a-z}71\_ncharsna}
+\_protected\_def\_bsansvariables  {\_umathrange{A-Z}71\_ncharbsA \_umathrange{a-z}71\_ncharbsa}
+\_protected\_def\_isansvariables  {\_umathrange{A-Z}71\_ncharsiA \_umathrange{a-z}71\_ncharsia}
+\_protected\_def\_bisansvariables {\_umathrange{A-Z}71\_ncharsxA \_umathrange{a-z}71\_ncharsxa}
+\_protected\_def\_ttvariables     {\_umathrange{A-Z}71\_ncharttA \_umathrange{a-z}71\_nchartta}
+
+\_chardef\_greekrmA="0391   \_chardef\_greekrma="03B1
+\_chardef\_greekbfA="1D6A8  \_chardef\_greekbfa="1D6C2
+\_chardef\_greekitA="1D6E2  \_chardef\_greekita="1D6FC
+\_chardef\_greekbiA="1D71C  \_chardef\_greekbia="1D736
+\_chardef\_greeksnA="1D756  \_chardef\_greeksna="1D770
+\_chardef\_greeksiA="1D790  \_chardef\_greeksia="1D7AA
+
+\_protected\_def\_itgreek    {\_umathrangegreek71\_greekita}
+\_protected\_def\_rmgreek    {\_umathrangegreek71\_greekrma}
+\_protected\_def\_bfgreek    {\_umathrangegreek71\_greekbfa}
+\_protected\_def\_bigreek    {\_umathrangegreek71\_greekbia}
+\_protected\_def\_bsansgreek {\_umathrangegreek71\_greeksna}
+\_protected\_def\_bisansgreek{\_umathrangegreek71\_greeksia}
+\_protected\_def\_itGreek    {\_umathrangeGREEK71\_greekitA}
+\_protected\_def\_rmGreek    {\_umathrangeGREEK71\_greekrmA}
+\_protected\_def\_bfGreek    {\_umathrangeGREEK71\_greekbfA}
+\_protected\_def\_biGreek    {\_umathrangeGREEK71\_greekbiA}
+\_protected\_def\_bsansGreek {\_umathrangeGREEK71\_greeksnA}
+\_protected\_def\_bisansGreek{\_umathrangeGREEK71\_greeksiA}
+
+\_chardef\_digitrmO=`0
+\_chardef\_digitbfO="1D7CE
+\_chardef\_digitbbO="1D7D8
+\_chardef\_digitsnO="1D7E2
+\_chardef\_digitbsO="1D7EC
+\_chardef\_digitttO="1D7F6
+
+\_protected\_def\_rmdigits    {\_umathrange{0-9}71\_digitrmO}
+\_protected\_def\_bfdigits    {\_umathrange{0-9}71\_digitbfO}
+\_protected\_def\_bbdigits    {\_umathrange{0-9}71\_digitbbO}
+\_protected\_def\_sansdigits  {\_umathrange{0-9}71\_digitsnO}
+\_protected\_def\_bsansdigits {\_umathrange{0-9}71\_digitbsO}
+\_protected\_def\_ttdigits    {\_umathrange{0-9}71\_digitttO}
+
+   \_doc -----------------------------
+   The  \`\cal`, \`\bbchar`, \`\frak`, \`\script`
+   and
+   the \`\rm`, \`\bf`, \`\it`, \`\bi`, \`\tt` are defined here.
+   Their \"8bit definitions" from the file `math-preload.opm`
+   (section~\ref[math-preload]) are removed.\nl
+   You can redefine them again if you need different behavior (for example
+   you don't want to use sans serif bold in math). What to do:
+   \begtt \advance\hsize by2em
+   \_protected\_def\_bf
+      {\_tryloadbf\_tenbf \_inmath{\_bfvariables\_bfgreek\_bfGreek\_bfdigits}}
+   \_protected\_def\_bi
+      {\_tryloadbi\_tenbi \_inmath{\_bivariables\_bigreek\_bfGreek\_bfdigits}}
+   \_public \bf \bi ;
+   \endtt
+   \`\_inmath` `{<cmds>}` applies `<cmds>` only in math mode.
+   \_cod -----------------------------
+
+\_protected\_def\_inmath#1{\_relax \_ifmmode#1\_fi} % to keep off \loop processing in text mode
+
+% You can redefine these macros to follow your wishes.
+% For example, you need upright lowercase greek letters, you don't need
+% \bf and \bi behave as sans serif in math, ...
+
+\_protected\_def\_rm {\_tryloadrm \_tenrm \_inmath{\_rmvariables \_rmdigits}}
+\_protected\_def\_it {\_tryloadit \_tenit \_inmath{\_itvariables}}
+\_protected\_def\_bf
+   {\_tryloadbf \_tenbf \_inmath{\_bsansvariables \_bsansgreek \_bsansGreek \_bsansdigits}}
+\_protected\_def\_bi
+   {\_tryloadbi \_tenbi \_inmath{\_bisansvariables \_bisansgreek \_bsansGreek \_bsansdigits}}
+\_protected\_def\_tt {\_tryloadtt \_tentt \_inmath{\_ttvariables \_ttdigits}}
+\_protected\_def\_bbchar  {\_bbvariables \_bbdigits}
+\_protected\_def\_cal     {\_calvariables}
+\_protected\_def\_frak    {\_frakvariables}
+\_protected\_def\_misans  {\_isansvariables \_sansdigits}
+\_protected\_def\_mbisans {\_bisansvariables \_bisansgreek \_bsansGreek \_bsansdigits}
+\_protected\_def\_script  {\_rmvariables \_fam4 }
+\_protected\_def\_mit     {\_itvariables \_rmdigits \_itgreek \_rmGreek }
+
+\_public \rm \it \bf \bi \tt \bbchar \cal \frak \misans \mbisans \script \mit ;
+
+   \_doc -----------------------------
+   Each Unicode slot carries information about math type. This is saved in
+   the file `mathclass.txt` which is copied to `mathclass.opm` The file
+   has the following format:
+   {\vitt{mathclass.opm}\verbinput (70-85) mathclass.opm }
+   We have to read this information and convert it to the `\Umathcode`s.
+   \_cod -----------------------------
+
+\_begingroup  % \input mathclass.opm  (which is a copy of MathClass.txt):
+   \_def\_p#1;#2{\_edef\_tmp{\_pB#2}\_ifx\_tmp\_empty \_else\_pA#1....\_end#2\_fi}
+   \_def\_pA#1..#2..#3\_end#4{%
+      \_ifx\_relax#2\_relax \_pset{"#1}{#4}\_else
+         \_umathnumA="#1
+         \_loop
+            \_pset{\_umathnumA}{#4}%
+            \_ifnum\_umathnumA<"#2 \_advance\_umathnumA by1
+         \_repeat
+      \_fi
+   }
+   \_def\_pB#1{\_if#1L1\_fi \_if#1B2\_fi \_if#1V2\_fi \_if#1R3\_fi \_if#1N0\_fi \_if#1U0\_fi
+             \_if#1F0\_fi \_if#1O4\_fi \_if#1C5\_fi \_if#1P6\_fi \_if#1A7\_fi}
+   \_def\_pset#1#2{\_global\_Umathcode#1=\_tmp\_space 1 #1\_relax
+      \_if#2O\_global\_Udelcode#1=1 #1\_relax\_fi
+      \_if#2C\_global\_Udelcode#1=1 #1\_relax\_fi
+      \_if#2F\_global\_Udelcode#1=1 #1\_relax\_fi
+   }
+   \_catcode`#=14
+   \_everypar={\_setbox0=\_lastbox \_par \_p}
+   \_setbox0=\_vbox{\_input mathclass.opm }
+\_endgroup
+
+   \_doc -----------------------------
+   Each math symbol has its declaration in the file `unicode-math-table.tex`
+   which is copied to `unimath-table.opm`. The file has the following format:
+   {\vitt{unimath-table.opm}\verbinput (70-85) unimath-table.opm }
+   We have to read this information and convert it to the Unicode math codes.
+   \_cod -----------------------------
+
+\_begingroup  % \input unimath-table.opm (it is a copy of unicode-math-table.tex):
+   \_def\UnicodeMathSymbol #1#2#3#4{%
+      \_ifnum#1=\_Umathcodenum#1 % the code isn't set by mathclass.opm
+          \_global\_Umathchardef#2=0 1 #1 \_global\_Umathcode#1=0 1 #1
+      \_else \_global\_Umathcharnumdef#2=\_Umathcodenum#1 \_fi
+      \_ifx#3\_mathopen   \_gdef#2{\_Udelimiter 4 1 #1 }\_fi
+      \_ifx#3\_mathclose  \_gdef#2{\_Udelimiter 5 1 #1 }\_fi
+      \_ifx#3\_mathaccent \_gdef#2{\_Umathaccent fixed 7 1 #1 }\_fi
+   }
+   \_input unimath-table.opm
+\_endgroup
+
+   \_doc -----------------------------
+   Many special characters must be declared with care...
+   \_cod -----------------------------
+
+\_global\_Udelcode`<=1 "027E8 % these characters have different meaning
+\_global\_Udelcode`>=1 "027E9 % as normal and as delimeter
+
+\_mit % default math alphabets setting
+
+% hyphen character is transformed to minus:
+\_Umathcode `- = 2 1 "2212
+
+% mathclass defines : as Punct, plain.tex as Rel, we keep mathclass,
+% i.e. there is difference from plain.tex, you can use $f:A\to B$.
+
+\_let\{=\lbrace \_let\}=\rbrace
+
+% mathclas defines ! as Ord, plain.tex as Close
+\_Umathcode `! = 5 1 `!  % keep plain.tex declaration
+\_Umathchardef \mathexclam = 5 1 `!
+% mathclas defines ? as Punct, plain.tex as Close
+\_Umathcode `? = 5 1 `?  % keep plain.tex declaration
+\_Umathchardef \mathquestion = 5 1 `?
+
+\_Umathcode `* = 2 1 "02217  % equivalent to \ast, like in plain TeX
+
+\_protected\_def \_sqrt       {\_Uradical 1 "0221A }
+\_protected\_def \_cuberoot   {\_Uradical 1 "0221B }
+\_protected\_def \_fourthroot {\_Uradical 1 "0221C }
+
+\_public \sqrt \cuberoot \fourthroot ;
+
+\_def\_intwithnolimits#1#2 {\_ifx#1\_relax \_else
+   \_ea\_let\_csname\_csstring#1op\_endcsname=#1%
+   \_ea\_def\_ea #1\_ea{\_csname\_csstring#1op\_endcsname \_nolimits}%
+   \_bgroup \_lccode`\~=#2 \_lowercase{\_egroup \_mathcode`~="8000 \_let ~=#1}%
+   \_ea \_intwithnolimits \_fi
+}
+\_intwithnolimits \int "0222B \iint "0222C \iiint "0222D
+   \oint "0222E \oiint "0222F \oiiint "02230
+   \intclockwise "02231 \varointclockwise "02232 \ointctrclockwise "02233
+   \sumint "02A0B \iiiint "02A0C \intbar "02A0D \intBar "02A0E \fint "02A0F
+   \pointint "02A15 \sqint "02A16 \intlarhk "02A17 \intx "02A18
+   \intcap "02A19 \intcup "02A1A \upint "02A1B \lowint "02A1C \_relax "0
+
+\_protected\_def \vert  {\_Udelimiter 0 1 "07C }
+\_protected\_def \Vert  {\_Udelimiter 0 1 "02016 }
+\_protected\_def \Vvert {\_Udelimiter 0 1 "02980 }
+
+\_protected\_def \_overbrace    #1{\mathop {\Umathaccent  7 1 "023DE{#1}}\limits}
+\_protected\_def \_underbrace   #1{\mathop {\Umathaccent bottom 7 1 "023DF{#1}}\limits}
+\_protected\_def \_overparen    #1{\mathop {\Umathaccent  7 1 "023DC{#1}}\limits}
+\_protected\_def \_underparen   #1{\mathop {\Umathaccent bottom 7 1 "023DD{#1}}\limits}
+\_protected\_def \_overbracket  #1{\mathop {\Umathaccent  7 1 "023B4{#1}}\limits}
+\_protected\_def \_underbracket #1{\mathop {\Umathaccent bottom 7 1 "023B5{#1}}\limits}
+
+\_public \overbrace \underbrace \overparen \underparen \overbracket \underbracket ;
+
+\_protected\def \widehat            {\Umathaccent 7 1 "00302 }
+\_protected\def \widetilde          {\Umathaccent 7 1 "00303 }
+\_protected\def \overleftharpoon    {\Umathaccent 7 1 "020D0 }
+\_protected\def \overrightharpoon   {\Umathaccent 7 1 "020D1 }
+\_protected\def \overleftarrow      {\Umathaccent 7 1 "020D6 }
+\_protected\def \overrightarrow     {\Umathaccent 7 1 "020D7 }
+\_protected\def \overleftrightarrow {\Umathaccent 7 1 "020E1 }
+
+\_mathchardef\ldotp="612E
+\_let\|=\Vert
+\_mathcode`\_="8000
+
+\_global\_Umathcode    "22EF         = 0 1 "22EF % mathclass says that it is Rel
+\_global\_Umathcode    "002E         = 0 1 "002E % mathclass says that dot is Punct
+\_global\_Umathchardef \unicodecdots = 0 1 "22EF
+
+\_global\_Umathcode `/ = 0 1 `/  % mathclass says that / is Bin, Plain TeX says that it is Ord.
+
+% compressed dots in S and SS styles (usable in \matrix when it is in T, S and SS style)
+\_protected\_def \vdots {\_relax \_ifnum \_mathstyle>3 \_unicodevdots \_else \_vdots \_fi}
+\_protected\_def \ddots {\_relax \_ifnum \_mathstyle>3 \_unicodeddots \_else \_ddots \_fi}
+\_protected\_def \adots {\_relax \_ifnum \_mathstyle>3 \_unicodeadots \_else \_adots \_fi}
+
+% Unicode superscripts (²) and subscripts as simple macros with \mathcode"8000
+\_bgroup
+   \_def\_tmp#1#2{\_global\_mathcode#1="8000 \_lccode`\~=#1 \_lowercase{\_gdef~}{#2}}
+   \_fornum 0..1 \_do {\_tmp{"207#1}{{^#1}}}
+   \_tmp{"B2}{{^2}}\_tmp{"B3}{{^3}}
+   \_fornum 4..9 \_do {\_tmp{"207#1}{{^#1}}}
+   \_fornum 0..9 \_do {\_tmp{"208#1}{{_#1}}}
+\_egroup
+
+   \_doc -----------------------------
+   Aliases are declared here. They are names not mentioned in the `unimath-table.opm` file
+   but commonly used in \TeX.
+   \_cod -----------------------------
+
+\_let \setminus=\smallsetminus
+\_let \diamond=\smwhtdiamond
+\_let \colon=\mathcolon
+\_let \bullet=\smblkcircle
+\_let \circ=\vysmwhtcircle
+\_let \bigcirc=\mdlgwhtcircle
+\_let \to=\rightarrow
+\_let \le=\leq
+\_let \ge=\geq
+\_let \neq=\ne
+\_protected\_def \triangle {\mathord{\bigtriangleup}}
+\_let \emptyset=\varnothing
+\_let \hbar=\hslash
+\_let \land=\wedge
+\_let \lor=\vee
+\_let \owns=\ni
+\_let \gets=\leftarrow
+\_let \mathring=\ocirc
+\_let \lnot=\neg
+\_let \longdivisionsign=\longdivision
+\_let \backepsilon=\upbackepsilon
+\_let \eth=\matheth
+\_let \dbkarow=\dbkarrow
+\_let \drbkarow=\drbkarrow
+\_let \hksearow=\hksearrow
+\_let \hkswarow=\hkswarrow
+
+\_let \upalpha=\mupalpha
+\_let \upbeta=\mupbeta
+\_let \upgamma=\mupgamma
+\_let \updelta=\mupdelta
+\_let \upepsilon=\mupvarepsilon
+\_let \upvarepsilon=\mupvarepsilon
+\_let \upzeta=\mupzeta
+\_let \upeta=\mupeta
+\_let \uptheta=\muptheta
+\_let \upiota=\mupiota
+\_let \upkappa=\mupkappa
+\_let \uplambda=\muplambda
+\_let \upmu=\mupmu
+\_let \upnu=\mupnu
+\_let \upxi=\mupxi
+\_let \upomicron=\mupomicron
+\_let \uppi=\muppi
+\_let \uprho=\muprho
+\_let \upvarrho=\mupvarrho
+\_let \upvarsigma=\mupvarsigma
+\_let \upsigma=\mupsigma
+\_let \uptau=\muptau
+\_let \upupsilon=\mupupsilon
+\_let \upvarphi=\mupvarphi
+\_let \upchi=\mupchi
+\_let \uppsi=\muppsi
+\_let \upomega=\mupomega
+\_let \upvartheta=\mupvartheta
+\_let \upphi=\mupphi
+\_let \upvarpi=\mupvarpi
+
+   \_doc -----------------------------
+   The \`\not` macro is redefined here. If the `\_not!<char>` is defined
+   (by \`\_negationof`)
+   then this macro is used. Else centered / is printed over the <char>.
+   \_cod -----------------------------
+
+\_protected\_def\_not#1{%
+  \_trycs{_not!\_csstring#1}{\_mathrel\_mathstyles{%
+     \_setbox0=\_hbox{\_math$\_currstyle#1$}%
+     \_hbox to\_wd0{\_hss$\_currstyle/$\_hss}\_kern-\_wd0 \_box0
+}}}
+\_def\_negationof #1#2{\_ea\_let \_csname _not!\_csstring#1\_endcsname =#2}
+
+\_negationof =         \neq
+\_negationof <         \nless
+\_negationof >         \ngtr
+\_negationof \gets     \nleftarrow
+\_negationof \simeq    \nsime
+\_negationof \equal    \ne
+\_negationof \le       \nleq
+\_negationof \ge       \ngeq
+\_negationof \greater  \ngtr
+\_negationof \forksnot \forks
+\_negationof \in       \notin
+\_negationof \mid      \nmid
+\_negationof \cong     \ncong
+\_negationof \leftarrow \nleftarrow
+\_negationof \rightarrow \nrightarrow
+\_negationof \leftrightarrow \nleftrightarrow
+\_negationof \Leftarrow \nLeftarrow
+\_negationof \Leftrightarrow \nLeftrightarrow
+\_negationof \Rightarrow \nRightarrow
+\_negationof \exists  \nexists
+\_negationof \ni      \nni
+\_negationof \paralel \nparalel
+\_negationof \sim     \nsim
+\_negationof \approx  \napprox
+\_negationof \equiv   \nequiv
+\_negationof \asymp   \nasymp
+\_negationof \lesssim \nlesssim
+\_negationof \ngtrsim \ngtrsim
+\_negationof \lessgtr \nlessgtr
+\_negationof \gtrless \ngtrless
+\_negationof \prec    \nprec
+\_negationof \succ    \nsucc
+\_negationof \subset  \nsubset
+\_negationof \supset  \nsupset
+\_negationof \subseteq \nsubseteq
+\_negationof \supseteq \nsupseteq
+\_negationof \vdash   \nvdash
+\_negationof \vDash   \nvDash
+\_negationof \Vdash  \nVdash
+\_negationof \VDash  \nVDash
+\_negationof \preccurlyeq \npreccurlyeq
+\_negationof \succcurlyeq \nsucccurlyeq
+\_negationof \sqsubseteq \nsqsubseteq
+\_negationof \sqsupseteq \nsqsupseteq
+\_negationof \vartriangleleft \nvartriangleleft
+\_negationof \vartriangleright \nvartriangleright
+\_negationof \trianglelefteq \ntrianglelefteq
+\_negationof \trianglerighteq \ntrianglerighteq
+\_negationof \vinfty \nvinfty
+
+\_public \not ;
+
+   \_doc -----------------------------
+   Newly declared public control sequences are used in internal macros by
+   \OpTeX/. We need to get new meanings for these control sequences in
+   the private namespace.
+   \_cod -----------------------------
+
+\_private
+   \ldotp \cdotp \bullet \triangleleft \trianglerigt \mapstochar \rightarrow
+   \prime \lhook \rightarrow \leftarrow \rhook \triangleright \triangleleft
+   \Relbar \Rightarrow \relbar \rightarrow \Leftarrow \mapstochar
+   \longrightarrow \Longleftrightarrow \unicodevdots \unicodeddots \unicodeadots ;
+
+\_endcode
+
+\secc More Unicode-math examples
+
+Example of using additional math font is in section 5.3 in the
+\ulink[http://petr.olsak.net/ftp/olsak/optex/optex-math.pdf]{\tt optex-math.pdf} documentation
+
+You can combine more Unicode math fonts in single formula simply
+by the `\addUmathfont` macro, see
+\ulink[http://petr.olsak.net/optex/optex-tricks.html#addumathfont]{\OpTeX/ trick 0030}.
+
+See \url{http://tex.stackexchange.com/questions/308749}
+for technical details about Unicode-math.
+
+\_endinput
+
+History:
+2021-03-11  Umathcode `* declaed as \ast
+2021-02-03  Unicode superscripts, subscripts declared
+2021-01-31  Mathcode of ! ? set to Close, codes undeclared in mathclass set correctly
+2021-01-23  Compressed \vdots, \ddots, \adots in script(script)style.
+2020-11-13  Bug fix: \colon declared
+2020-06-13  Umathcode of / declared as in Plain TeX
+2020-06-07  \_itgreek \_itGreek, \_rmgreek \_rmGreek etc. introduced, names changed
+2020-06-03  \not\mid = \nmid added, \not corrected
+2020-04-30  Bug fix: \phi, \varpi etc. were bad encoded
+2020-04-09  Bug fix: \Udelcode`<, \Udelcode`> added
diff --git a/Master/texmf-dist/tex/optex/base/unimath-table.opm b/Master/texmf-dist/tex/optex/base/unimath-table.opm
new file mode 100644
index 00000000000..252c1fc26ac
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/unimath-table.opm
@@ -0,0 +1,2471 @@
+%%^^A%% unicode-math-table.tex -- part of UNICODE-MATH <wspr.io/unicode-math>
+%%^^A%% Source file of the math symbols.
+
+% Only \ddots, \adots and \vdots are called differently:
+% \unicodeddots, \unicodeadots and \unicodevdots
+% \mathquestion: Ord -> Close (because plain.tex declares it as Close)
+
+\UnicodeMathSymbol{"00021}{\mathexclam               }{\mathclose}{exclamation mark}%
+\UnicodeMathSymbol{"00023}{\mathoctothorpe           }{\mathord}{number sign}%
+\UnicodeMathSymbol{"00024}{\mathdollar               }{\mathord}{dollar sign}%
+\UnicodeMathSymbol{"00025}{\mathpercent              }{\mathord}{percent sign}%
+\UnicodeMathSymbol{"00026}{\mathampersand            }{\mathord}{ampersand}%
+\UnicodeMathSymbol{"00028}{\lparen                   }{\mathopen}{left parenthesis}%
+\UnicodeMathSymbol{"00029}{\rparen                   }{\mathclose}{right parenthesis}%
+\UnicodeMathSymbol{"0002B}{\mathplus                 }{\mathbin}{plus sign b:}%
+\UnicodeMathSymbol{"0002C}{\mathcomma                }{\mathpunct}{comma}%
+\UnicodeMathSymbol{"0002E}{\mathperiod               }{\mathord}{full stop, period}%
+\UnicodeMathSymbol{"0002F}{\mathslash                }{\mathord}{solidus}%
+\UnicodeMathSymbol{"0003A}{\mathcolon                }{\mathpunct}{colon}%
+\UnicodeMathSymbol{"0003B}{\mathsemicolon            }{\mathpunct}{semicolon p:}%
+\UnicodeMathSymbol{"0003C}{\less                     }{\mathrel}{less-than sign r:}%
+\UnicodeMathSymbol{"0003D}{\equal                    }{\mathrel}{equals sign r:}%
+\UnicodeMathSymbol{"0003E}{\greater                  }{\mathrel}{greater-than sign r:}%
+\UnicodeMathSymbol{"0003F}{\mathquestion             }{\mathclose}{question mark}%
+\UnicodeMathSymbol{"00040}{\mathatsign               }{\mathord}{commercial at}%
+\UnicodeMathSymbol{"0005B}{\lbrack                   }{\mathopen}{left square bracket}%
+\UnicodeMathSymbol{"0005C}{\backslash                }{\mathord}{reverse solidus}%
+\UnicodeMathSymbol{"0005D}{\rbrack                   }{\mathclose}{right square bracket}%
+\UnicodeMathSymbol{"0007B}{\lbrace                   }{\mathopen}{left curly bracket}%
+\UnicodeMathSymbol{"0007C}{\vert                     }{\mathfence}{vertical bar}%
+\UnicodeMathSymbol{"0007D}{\rbrace                   }{\mathclose}{right curly bracket}%
+\UnicodeMathSymbol{"000A3}{\mathsterling             }{\mathord}{pound sign}%
+\UnicodeMathSymbol{"000A5}{\mathyen                  }{\mathord}{yen sign}%
+\UnicodeMathSymbol{"000A7}{\mathsection              }{\mathord}{section symbol}%
+\UnicodeMathSymbol{"000AC}{\neg                      }{\mathord}{/neg /lnot not sign}%
+\UnicodeMathSymbol{"000B1}{\pm                       }{\mathbin}{plus-or-minus sign}%
+\UnicodeMathSymbol{"000B6}{\mathparagraph            }{\mathord}{paragraph symbol}%
+\UnicodeMathSymbol{"000B7}{\cdotp                    }{\mathbin}{/centerdot b: middle dot}%
+\UnicodeMathSymbol{"000D7}{\times                    }{\mathbin}{multiply sign}%
+\UnicodeMathSymbol{"000F0}{\matheth                  }{\mathalpha}{eth}%
+\UnicodeMathSymbol{"000F7}{\div                      }{\mathbin}{divide sign}%
+\UnicodeMathSymbol{"001B5}{\Zbar                     }{\mathord}{impedance (latin capital letter z with stroke)}%
+\UnicodeMathSymbol{"00300}{\grave                    }{\mathaccent}{grave accent}%
+\UnicodeMathSymbol{"00301}{\acute                    }{\mathaccent}{acute accent}%
+\UnicodeMathSymbol{"00302}{\hat                      }{\mathaccent}{circumflex accent}%
+\UnicodeMathSymbol{"00302}{\widehat                  }{\mathaccentwide}{circumflex accent}%
+\UnicodeMathSymbol{"00303}{\tilde                    }{\mathaccent}{tilde}%
+\UnicodeMathSymbol{"00303}{\widetilde                }{\mathaccentwide}{tilde}%
+\UnicodeMathSymbol{"00304}{\bar                      }{\mathaccent}{macron}%
+\UnicodeMathSymbol{"00305}{\overbar                  }{\mathaccent}{overbar embellishment}%
+\UnicodeMathSymbol{"00305}{\wideoverbar              }{\mathaccentwide}{stretchy overbar embellishment}%
+\UnicodeMathSymbol{"00306}{\breve                    }{\mathaccent}{breve}%
+\UnicodeMathSymbol{"00306}{\widebreve                }{\mathaccentwide}{stretchy breve}%
+\UnicodeMathSymbol{"00307}{\dot                      }{\mathaccent}{dot above}%
+\UnicodeMathSymbol{"00308}{\ddot                     }{\mathaccent}{dieresis}%
+\UnicodeMathSymbol{"00309}{\ovhook                   }{\mathaccent}{combining hook above}%
+\UnicodeMathSymbol{"0030A}{\ocirc                    }{\mathaccent}{ring}%
+\UnicodeMathSymbol{"0030C}{\check                    }{\mathaccent}{caron}%
+\UnicodeMathSymbol{"0030C}{\widecheck                }{\mathaccentwide}{stretchy caron}%
+\UnicodeMathSymbol{"00310}{\candra                   }{\mathaccent}{candrabindu (non-spacing)}%
+\UnicodeMathSymbol{"00312}{\oturnedcomma             }{\mathaccent}{combining turned comma above}%
+\UnicodeMathSymbol{"00315}{\ocommatopright           }{\mathaccent}{combining comma above right}%
+\UnicodeMathSymbol{"0031A}{\droang                   }{\mathaccent}{left angle above (non-spacing)}%
+\UnicodeMathSymbol{"00330}{\wideutilde               }{\mathbotaccentwide}{under tilde accent (multiple characters and non-spacing)}%
+\UnicodeMathSymbol{"00332}{\mathunderbar             }{\mathbotaccentwide}{combining low line}%
+\UnicodeMathSymbol{"00338}{\notaccent                }{\mathaccentoverlay}{combining long solidus overlay}%
+\UnicodeMathSymbol{"0034D}{\underleftrightarrow      }{\mathbotaccentwide}{underleftrightarrow accent}%
+\UnicodeMathSymbol{"00391}{\mupAlpha                 }{\mathalpha}{capital alpha, greek}%
+\UnicodeMathSymbol{"00392}{\mupBeta                  }{\mathalpha}{capital beta, greek}%
+\UnicodeMathSymbol{"00393}{\mupGamma                 }{\mathalpha}{capital gamma, greek}%
+\UnicodeMathSymbol{"00394}{\mupDelta                 }{\mathalpha}{capital delta, greek}%
+\UnicodeMathSymbol{"00395}{\mupEpsilon               }{\mathalpha}{capital epsilon, greek}%
+\UnicodeMathSymbol{"00396}{\mupZeta                  }{\mathalpha}{capital zeta, greek}%
+\UnicodeMathSymbol{"00397}{\mupEta                   }{\mathalpha}{capital eta, greek}%
+\UnicodeMathSymbol{"00398}{\mupTheta                 }{\mathalpha}{capital theta, greek}%
+\UnicodeMathSymbol{"00399}{\mupIota                  }{\mathalpha}{capital iota, greek}%
+\UnicodeMathSymbol{"0039A}{\mupKappa                 }{\mathalpha}{capital kappa, greek}%
+\UnicodeMathSymbol{"0039B}{\mupLambda                }{\mathalpha}{capital lambda, greek}%
+\UnicodeMathSymbol{"0039C}{\mupMu                    }{\mathalpha}{capital mu, greek}%
+\UnicodeMathSymbol{"0039D}{\mupNu                    }{\mathalpha}{capital nu, greek}%
+\UnicodeMathSymbol{"0039E}{\mupXi                    }{\mathalpha}{capital xi, greek}%
+\UnicodeMathSymbol{"0039F}{\mupOmicron               }{\mathalpha}{capital omicron, greek}%
+\UnicodeMathSymbol{"003A0}{\mupPi                    }{\mathalpha}{capital pi, greek}%
+\UnicodeMathSymbol{"003A1}{\mupRho                   }{\mathalpha}{capital rho, greek}%
+\UnicodeMathSymbol{"003A3}{\mupSigma                 }{\mathalpha}{capital sigma, greek}%
+\UnicodeMathSymbol{"003A4}{\mupTau                   }{\mathalpha}{capital tau, greek}%
+\UnicodeMathSymbol{"003A5}{\mupUpsilon               }{\mathalpha}{capital upsilon, greek}%
+\UnicodeMathSymbol{"003A6}{\mupPhi                   }{\mathalpha}{capital phi, greek}%
+\UnicodeMathSymbol{"003A7}{\mupChi                   }{\mathalpha}{capital chi, greek}%
+\UnicodeMathSymbol{"003A8}{\mupPsi                   }{\mathalpha}{capital psi, greek}%
+\UnicodeMathSymbol{"003A9}{\mupOmega                 }{\mathalpha}{capital omega, greek}%
+\UnicodeMathSymbol{"003B1}{\mupalpha                 }{\mathalpha}{small alpha, greek}%
+\UnicodeMathSymbol{"003B2}{\mupbeta                  }{\mathalpha}{small beta, greek}%
+\UnicodeMathSymbol{"003B3}{\mupgamma                 }{\mathalpha}{small gamma, greek}%
+\UnicodeMathSymbol{"003B4}{\mupdelta                 }{\mathalpha}{small delta, greek}%
+\UnicodeMathSymbol{"003B5}{\mupvarepsilon            }{\mathalpha}{rounded small varepsilon, greek}%
+\UnicodeMathSymbol{"003B6}{\mupzeta                  }{\mathalpha}{small zeta, greek}%
+\UnicodeMathSymbol{"003B7}{\mupeta                   }{\mathalpha}{small eta, greek}%
+\UnicodeMathSymbol{"003B8}{\muptheta                 }{\mathalpha}{straight theta, small theta, greek}%
+\UnicodeMathSymbol{"003B9}{\mupiota                  }{\mathalpha}{small iota, greek}%
+\UnicodeMathSymbol{"003BA}{\mupkappa                 }{\mathalpha}{small kappa, greek}%
+\UnicodeMathSymbol{"003BB}{\muplambda                }{\mathalpha}{small lambda, greek}%
+\UnicodeMathSymbol{"003BC}{\mupmu                    }{\mathalpha}{small mu, greek}%
+\UnicodeMathSymbol{"003BD}{\mupnu                    }{\mathalpha}{small nu, greek}%
+\UnicodeMathSymbol{"003BE}{\mupxi                    }{\mathalpha}{small xi, greek}%
+\UnicodeMathSymbol{"003BF}{\mupomicron               }{\mathalpha}{small omicron, greek}%
+\UnicodeMathSymbol{"003C0}{\muppi                    }{\mathalpha}{small pi, greek}%
+\UnicodeMathSymbol{"003C1}{\muprho                   }{\mathalpha}{small rho, greek}%
+\UnicodeMathSymbol{"003C2}{\mupvarsigma              }{\mathalpha}{terminal sigma, greek}%
+\UnicodeMathSymbol{"003C3}{\mupsigma                 }{\mathalpha}{small sigma, greek}%
+\UnicodeMathSymbol{"003C4}{\muptau                   }{\mathalpha}{small tau, greek}%
+\UnicodeMathSymbol{"003C5}{\mupupsilon               }{\mathalpha}{small upsilon, greek}%
+\UnicodeMathSymbol{"003C6}{\mupvarphi                }{\mathalpha}{curly or open small phi, greek}%
+\UnicodeMathSymbol{"003C7}{\mupchi                   }{\mathalpha}{small chi, greek}%
+\UnicodeMathSymbol{"003C8}{\muppsi                   }{\mathalpha}{small psi, greek}%
+\UnicodeMathSymbol{"003C9}{\mupomega                 }{\mathalpha}{small omega, greek}%
+\UnicodeMathSymbol{"003D1}{\mupvartheta              }{\mathalpha}{/vartheta - curly or open theta}%
+\UnicodeMathSymbol{"003D5}{\mupphi                   }{\mathalpha}{/straightphi - small phi, greek}%
+\UnicodeMathSymbol{"003D6}{\mupvarpi                 }{\mathalpha}{rounded small pi (pomega), greek}%
+\UnicodeMathSymbol{"003DC}{\upDigamma                }{\mathalpha}{capital digamma}%
+\UnicodeMathSymbol{"003DD}{\updigamma                }{\mathalpha}{old greek small letter digamma}%
+\UnicodeMathSymbol{"003F0}{\mupvarkappa              }{\mathalpha}{rounded small kappa, greek}%
+\UnicodeMathSymbol{"003F1}{\mupvarrho                }{\mathalpha}{rounded small rho, greek}%
+\UnicodeMathSymbol{"003F4}{\mupvarTheta              }{\mathalpha}{greek capital theta symbol}%
+\UnicodeMathSymbol{"003F5}{\mupepsilon               }{\mathalpha}{greek lunate varepsilon symbol}%
+\UnicodeMathSymbol{"003F6}{\upbackepsilon            }{\mathord}{greek reversed lunate epsilon symbol}%
+\UnicodeMathSymbol{"02010}{\mathhyphen               }{\mathalpha}{hyphen}%
+\UnicodeMathSymbol{"02015}{\horizbar                 }{\mathord}{horizontal bar}%
+\UnicodeMathSymbol{"02016}{\Vert                     }{\mathfence}{double vertical bar}%
+\UnicodeMathSymbol{"02017}{\twolowline               }{\mathord}{double low line (spacing)}%
+\UnicodeMathSymbol{"02020}{\dagger                   }{\mathbin}{dagger relation}%
+\UnicodeMathSymbol{"02021}{\ddagger                  }{\mathbin}{double dagger relation}%
+\UnicodeMathSymbol{"02022}{\smblkcircle              }{\mathbin}{/bullet b: round bullet, filled}%
+\UnicodeMathSymbol{"02025}{\enleadertwodots          }{\mathord}{double baseline dot (en leader)}%
+\UnicodeMathSymbol{"02026}{\unicodeellipsis          }{\mathord}{ellipsis (horizontal)}%
+\UnicodeMathSymbol{"02032}{\prime                    }{\mathord}{prime or minute, not superscripted}%
+\UnicodeMathSymbol{"02033}{\dprime                   }{\mathord}{double prime or second, not superscripted}%
+\UnicodeMathSymbol{"02034}{\trprime                  }{\mathord}{triple prime (not superscripted)}%
+\UnicodeMathSymbol{"02035}{\backprime                }{\mathord}{reverse prime, not superscripted}%
+\UnicodeMathSymbol{"02036}{\backdprime               }{\mathord}{double reverse prime, not superscripted}%
+\UnicodeMathSymbol{"02037}{\backtrprime              }{\mathord}{triple reverse prime, not superscripted}%
+\UnicodeMathSymbol{"02038}{\caretinsert              }{\mathord}{caret (insertion mark)}%
+\UnicodeMathSymbol{"0203C}{\Exclam                   }{\mathord}{double exclamation mark}%
+\UnicodeMathSymbol{"02040}{\tieconcat                }{\mathbin}{character tie, z notation sequence concatenation}%
+\UnicodeMathSymbol{"02043}{\hyphenbullet             }{\mathord}{rectangle, filled (hyphen bullet)}%
+\UnicodeMathSymbol{"02044}{\fracslash                }{\mathbin}{fraction slash}%
+\UnicodeMathSymbol{"02047}{\Question                 }{\mathord}{double question mark}%
+\UnicodeMathSymbol{"02050}{\closure                  }{\mathrel}{close up}%
+\UnicodeMathSymbol{"02057}{\qprime                   }{\mathord}{quadruple prime, not superscripted}%
+\UnicodeMathSymbol{"020AC}{\euro                     }{\mathord}{euro sign}%
+\UnicodeMathSymbol{"020D0}{\leftharpoonaccent        }{\mathaccent}{combining left harpoon above}%
+\UnicodeMathSymbol{"020D0}{\overleftharpoon          }{\mathaccentwide}{combining left harpoon above}%
+\UnicodeMathSymbol{"020D1}{\rightharpoonaccent       }{\mathaccent}{combining right harpoon above}%
+\UnicodeMathSymbol{"020D1}{\overrightharpoon         }{\mathaccentwide}{combining right harpoon above}%
+\UnicodeMathSymbol{"020D2}{\vertoverlay              }{\mathaccent}{combining long vertical line overlay}%
+\UnicodeMathSymbol{"020D6}{\overleftarrow            }{\mathaccentwide}{combining left arrow above}%
+\UnicodeMathSymbol{"020D7}{\overrightarrow           }{\mathaccentwide}{combining left arrow above}%
+\UnicodeMathSymbol{"020D7}{\vec                      }{\mathaccent}{combining right arrow above}%
+\UnicodeMathSymbol{"020DB}{\dddot                    }{\mathaccent}{combining three dots above}%
+\UnicodeMathSymbol{"020DC}{\ddddot                   }{\mathaccent}{combining four dots above}%
+\UnicodeMathSymbol{"020DD}{\enclosecircle            }{\mathord}{combining enclosing circle}%
+\UnicodeMathSymbol{"020DE}{\enclosesquare            }{\mathord}{combining enclosing square}%
+\UnicodeMathSymbol{"020DF}{\enclosediamond           }{\mathord}{combining enclosing diamond}%
+\UnicodeMathSymbol{"020E1}{\overleftrightarrow       }{\mathaccentwide}{combining left right arrow above}%
+\UnicodeMathSymbol{"020E4}{\enclosetriangle          }{\mathord}{combining enclosing upward pointing triangle}%
+\UnicodeMathSymbol{"020E7}{\annuity                  }{\mathaccent}{combining annuity symbol}%
+\UnicodeMathSymbol{"020E8}{\threeunderdot            }{\mathbotaccent}{combining triple underdot}%
+\UnicodeMathSymbol{"020E9}{\widebridgeabove          }{\mathaccent}{combining wide bridge above}%
+\UnicodeMathSymbol{"020EC}{\underrightharpoondown    }{\mathbotaccentwide}{combining rightwards harpoon with barb downwards}%
+\UnicodeMathSymbol{"020ED}{\underleftharpoondown     }{\mathbotaccentwide}{combining leftwards harpoon with barb downwards}%
+\UnicodeMathSymbol{"020EE}{\underleftarrow           }{\mathbotaccentwide}{combining left arrow below}%
+\UnicodeMathSymbol{"020EF}{\underrightarrow          }{\mathbotaccentwide}{combining right arrow below}%
+\UnicodeMathSymbol{"020F0}{\asteraccent              }{\mathaccent}{combining asterisk above}%
+\UnicodeMathSymbol{"02102}{\BbbC                     }{\mathalpha}{/bbb c, open face c}%
+\UnicodeMathSymbol{"02107}{\Eulerconst               }{\mathord}{euler constant}%
+\UnicodeMathSymbol{"0210A}{\mscrg                    }{\mathalpha}{/scr g, script letter g}%
+\UnicodeMathSymbol{"0210B}{\mscrH                    }{\mathalpha}{hamiltonian (script capital h)}%
+\UnicodeMathSymbol{"0210C}{\mfrakH                   }{\mathalpha}{/frak h, upper case h}%
+\UnicodeMathSymbol{"0210D}{\BbbH                     }{\mathalpha}{/bbb h, open face h}%
+\UnicodeMathSymbol{"0210E}{\Planckconst              }{\mathord}{planck constant}%
+\UnicodeMathSymbol{"0210F}{\hslash                   }{\mathalpha}{/hslash - variant planck's over 2pi}%
+\UnicodeMathSymbol{"02110}{\mscrI                    }{\mathalpha}{/scr i, script letter i}%
+\UnicodeMathSymbol{"02111}{\Im                       }{\mathalpha}{imaginary part}%
+\UnicodeMathSymbol{"02112}{\mscrL                    }{\mathalpha}{lagrangian (script capital l)}%
+\UnicodeMathSymbol{"02113}{\ell                      }{\mathalpha}{cursive small l}%
+\UnicodeMathSymbol{"02115}{\BbbN                     }{\mathalpha}{/bbb n, open face n}%
+\UnicodeMathSymbol{"02118}{\wp                       }{\mathalpha}{weierstrass p}%
+\UnicodeMathSymbol{"02119}{\BbbP                     }{\mathalpha}{/bbb p, open face p}%
+\UnicodeMathSymbol{"0211A}{\BbbQ                     }{\mathalpha}{/bbb q, open face q}%
+\UnicodeMathSymbol{"0211B}{\mscrR                    }{\mathalpha}{/scr r, script letter r}%
+\UnicodeMathSymbol{"0211C}{\Re                       }{\mathalpha}{real part}%
+\UnicodeMathSymbol{"0211D}{\BbbR                     }{\mathalpha}{/bbb r, open face r}%
+\UnicodeMathSymbol{"02124}{\BbbZ                     }{\mathalpha}{/bbb z, open face z}%
+\UnicodeMathSymbol{"02127}{\mho                      }{\mathord}{conductance}%
+\UnicodeMathSymbol{"02128}{\mfrakZ                   }{\mathalpha}{/frak z, upper case z}%
+\UnicodeMathSymbol{"02129}{\turnediota               }{\mathalpha}{turned iota}%
+\UnicodeMathSymbol{"0212B}{\Angstrom                 }{\mathalpha}{angstrom capital a, ring}%
+\UnicodeMathSymbol{"0212C}{\mscrB                    }{\mathalpha}{bernoulli function (script capital b)}%
+\UnicodeMathSymbol{"0212D}{\mfrakC                   }{\mathalpha}{black-letter capital c}%
+\UnicodeMathSymbol{"0212F}{\mscre                    }{\mathalpha}{/scr e, script letter e}%
+\UnicodeMathSymbol{"02130}{\mscrE                    }{\mathalpha}{/scr e, script letter e}%
+\UnicodeMathSymbol{"02131}{\mscrF                    }{\mathalpha}{/scr f, script letter f}%
+\UnicodeMathSymbol{"02132}{\Finv                     }{\mathord}{turned capital f}%
+\UnicodeMathSymbol{"02133}{\mscrM                    }{\mathalpha}{physics m-matrix (script capital m)}%
+\UnicodeMathSymbol{"02134}{\mscro                    }{\mathalpha}{order of (script small o)}%
+\UnicodeMathSymbol{"02135}{\aleph                    }{\mathalpha}{aleph, hebrew}%
+\UnicodeMathSymbol{"02136}{\beth                     }{\mathalpha}{beth, hebrew}%
+\UnicodeMathSymbol{"02137}{\gimel                    }{\mathalpha}{gimel, hebrew}%
+\UnicodeMathSymbol{"02138}{\daleth                   }{\mathalpha}{daleth, hebrew}%
+\UnicodeMathSymbol{"0213C}{\Bbbpi                    }{\mathord}{double-struck small pi}%
+\UnicodeMathSymbol{"0213D}{\Bbbgamma                 }{\mathalpha}{double-struck small gamma}%
+\UnicodeMathSymbol{"0213E}{\BbbGamma                 }{\mathalpha}{double-struck capital gamma}%
+\UnicodeMathSymbol{"0213F}{\BbbPi                    }{\mathalpha}{double-struck capital pi}%
+\UnicodeMathSymbol{"02140}{\Bbbsum                   }{\mathop}{double-struck n-ary summation}%
+\UnicodeMathSymbol{"02141}{\Game                     }{\mathord}{turned sans-serif capital g}%
+\UnicodeMathSymbol{"02142}{\sansLturned              }{\mathord}{turned sans-serif capital l}%
+\UnicodeMathSymbol{"02143}{\sansLmirrored            }{\mathord}{reversed sans-serif capital l}%
+\UnicodeMathSymbol{"02144}{\Yup                      }{\mathord}{turned sans-serif capital y}%
+\UnicodeMathSymbol{"02145}{\mitBbbD                  }{\mathord}{double-struck italic capital d}%
+\UnicodeMathSymbol{"02146}{\mitBbbd                  }{\mathord}{double-struck italic small d}%
+\UnicodeMathSymbol{"02147}{\mitBbbe                  }{\mathord}{double-struck italic small e}%
+\UnicodeMathSymbol{"02148}{\mitBbbi                  }{\mathord}{double-struck italic small i}%
+\UnicodeMathSymbol{"02149}{\mitBbbj                  }{\mathord}{double-struck italic small j}%
+\UnicodeMathSymbol{"0214A}{\PropertyLine             }{\mathord}{property line}%
+\UnicodeMathSymbol{"0214B}{\upand                    }{\mathbin}{turned ampersand}%
+\UnicodeMathSymbol{"02190}{\leftarrow                }{\mathrel}{/leftarrow /gets a: leftward arrow}%
+\UnicodeMathSymbol{"02191}{\uparrow                  }{\mathrel}{upward arrow}%
+\UnicodeMathSymbol{"02192}{\rightarrow               }{\mathrel}{/rightarrow /to a: rightward arrow}%
+\UnicodeMathSymbol{"02193}{\downarrow                }{\mathrel}{downward arrow}%
+\UnicodeMathSymbol{"02194}{\leftrightarrow           }{\mathrel}{left and right arrow}%
+\UnicodeMathSymbol{"02195}{\updownarrow              }{\mathrel}{up and down arrow}%
+\UnicodeMathSymbol{"02196}{\nwarrow                  }{\mathrel}{nw pointing arrow}%
+\UnicodeMathSymbol{"02197}{\nearrow                  }{\mathrel}{ne pointing arrow}%
+\UnicodeMathSymbol{"02198}{\searrow                  }{\mathrel}{se pointing arrow}%
+\UnicodeMathSymbol{"02199}{\swarrow                  }{\mathrel}{sw pointing arrow}%
+\UnicodeMathSymbol{"0219A}{\nleftarrow               }{\mathrel}{not left arrow}%
+\UnicodeMathSymbol{"0219B}{\nrightarrow              }{\mathrel}{not right arrow}%
+\UnicodeMathSymbol{"0219C}{\leftwavearrow            }{\mathrel}{left arrow-wavy}%
+\UnicodeMathSymbol{"0219D}{\rightwavearrow           }{\mathrel}{right arrow-wavy}%
+\UnicodeMathSymbol{"0219E}{\twoheadleftarrow         }{\mathrel}{left two-headed arrow}%
+\UnicodeMathSymbol{"0219F}{\twoheaduparrow           }{\mathrel}{up two-headed arrow}%
+\UnicodeMathSymbol{"021A0}{\twoheadrightarrow        }{\mathrel}{right two-headed arrow}%
+\UnicodeMathSymbol{"021A1}{\twoheaddownarrow         }{\mathrel}{down two-headed arrow}%
+\UnicodeMathSymbol{"021A2}{\leftarrowtail            }{\mathrel}{left arrow-tailed}%
+\UnicodeMathSymbol{"021A3}{\rightarrowtail           }{\mathrel}{right arrow-tailed}%
+\UnicodeMathSymbol{"021A4}{\mapsfrom                 }{\mathrel}{maps to, leftward}%
+\UnicodeMathSymbol{"021A5}{\mapsup                   }{\mathrel}{maps to, upward}%
+\UnicodeMathSymbol{"021A6}{\mapsto                   }{\mathrel}{maps to, rightward}%
+\UnicodeMathSymbol{"021A7}{\mapsdown                 }{\mathrel}{maps to, downward}%
+\UnicodeMathSymbol{"021A8}{\updownarrowbar           }{\mathord}{up down arrow with base (perpendicular)}%
+\UnicodeMathSymbol{"021A9}{\hookleftarrow            }{\mathrel}{left arrow-hooked}%
+\UnicodeMathSymbol{"021AA}{\hookrightarrow           }{\mathrel}{right arrow-hooked}%
+\UnicodeMathSymbol{"021AB}{\looparrowleft            }{\mathrel}{left arrow-looped}%
+\UnicodeMathSymbol{"021AC}{\looparrowright           }{\mathrel}{right arrow-looped}%
+\UnicodeMathSymbol{"021AD}{\leftrightsquigarrow      }{\mathrel}{left and right arr-wavy}%
+\UnicodeMathSymbol{"021AE}{\nleftrightarrow          }{\mathrel}{not left and right arrow}%
+\UnicodeMathSymbol{"021AF}{\downzigzagarrow          }{\mathrel}{downwards zigzag arrow}%
+\UnicodeMathSymbol{"021B0}{\Lsh                      }{\mathrel}{/lsh a:}%
+\UnicodeMathSymbol{"021B1}{\Rsh                      }{\mathrel}{/rsh a:}%
+\UnicodeMathSymbol{"021B2}{\Ldsh                     }{\mathrel}{left down angled arrow}%
+\UnicodeMathSymbol{"021B3}{\Rdsh                     }{\mathrel}{right down angled arrow}%
+\UnicodeMathSymbol{"021B4}{\linefeed                 }{\mathord}{rightwards arrow with corner downwards}%
+\UnicodeMathSymbol{"021B5}{\carriagereturn           }{\mathord}{downwards arrow with corner leftward = carriage return}%
+\UnicodeMathSymbol{"021B6}{\curvearrowleft           }{\mathrel}{left curved arrow}%
+\UnicodeMathSymbol{"021B7}{\curvearrowright          }{\mathrel}{right curved arrow}%
+\UnicodeMathSymbol{"021B8}{\barovernorthwestarrow    }{\mathord}{north west arrow to long bar}%
+\UnicodeMathSymbol{"021B9}{\barleftarrowrightarrowbar}{\mathord}{leftwards arrow to bar over rightwards arrow to bar}%
+\UnicodeMathSymbol{"021BA}{\acwopencirclearrow       }{\mathord}{anticlockwise open circle arrow}%
+\UnicodeMathSymbol{"021BB}{\cwopencirclearrow        }{\mathord}{clockwise open circle arrow}%
+\UnicodeMathSymbol{"021BC}{\leftharpoonup            }{\mathrel}{left harpoon-up}%
+\UnicodeMathSymbol{"021BD}{\leftharpoondown          }{\mathrel}{left harpoon-down}%
+\UnicodeMathSymbol{"021BE}{\upharpoonright           }{\mathrel}{/upharpoonright /restriction a: up harpoon-right}%
+\UnicodeMathSymbol{"021BF}{\upharpoonleft            }{\mathrel}{up harpoon-left}%
+\UnicodeMathSymbol{"021C0}{\rightharpoonup           }{\mathrel}{right harpoon-up}%
+\UnicodeMathSymbol{"021C1}{\rightharpoondown         }{\mathrel}{right harpoon-down}%
+\UnicodeMathSymbol{"021C2}{\downharpoonright         }{\mathrel}{down harpoon-right}%
+\UnicodeMathSymbol{"021C3}{\downharpoonleft          }{\mathrel}{down harpoon-left}%
+\UnicodeMathSymbol{"021C4}{\rightleftarrows          }{\mathrel}{right arrow over left arrow}%
+\UnicodeMathSymbol{"021C5}{\updownarrows             }{\mathrel}{up arrow, down arrow}%
+\UnicodeMathSymbol{"021C6}{\leftrightarrows          }{\mathrel}{left arrow over right arrow}%
+\UnicodeMathSymbol{"021C7}{\leftleftarrows           }{\mathrel}{two left arrows}%
+\UnicodeMathSymbol{"021C8}{\upuparrows               }{\mathrel}{two up arrows}%
+\UnicodeMathSymbol{"021C9}{\rightrightarrows         }{\mathrel}{two right arrows}%
+\UnicodeMathSymbol{"021CA}{\downdownarrows           }{\mathrel}{two down arrows}%
+\UnicodeMathSymbol{"021CB}{\leftrightharpoons        }{\mathrel}{left harpoon over right}%
+\UnicodeMathSymbol{"021CC}{\rightleftharpoons        }{\mathrel}{right harpoon over left}%
+\UnicodeMathSymbol{"021CD}{\nLeftarrow               }{\mathrel}{not implied by}%
+\UnicodeMathSymbol{"021CE}{\nLeftrightarrow          }{\mathrel}{not left and right double arrows}%
+\UnicodeMathSymbol{"021CF}{\nRightarrow              }{\mathrel}{not implies}%
+\UnicodeMathSymbol{"021D0}{\Leftarrow                }{\mathrel}{is implied by}%
+\UnicodeMathSymbol{"021D1}{\Uparrow                  }{\mathrel}{up double arrow}%
+\UnicodeMathSymbol{"021D2}{\Rightarrow               }{\mathrel}{implies}%
+\UnicodeMathSymbol{"021D3}{\Downarrow                }{\mathrel}{down double arrow}%
+\UnicodeMathSymbol{"021D4}{\Leftrightarrow           }{\mathrel}{left and right double arrow}%
+\UnicodeMathSymbol{"021D5}{\Updownarrow              }{\mathrel}{up and down double arrow}%
+\UnicodeMathSymbol{"021D6}{\Nwarrow                  }{\mathrel}{nw pointing double arrow}%
+\UnicodeMathSymbol{"021D7}{\Nearrow                  }{\mathrel}{ne pointing double arrow}%
+\UnicodeMathSymbol{"021D8}{\Searrow                  }{\mathrel}{se pointing double arrow}%
+\UnicodeMathSymbol{"021D9}{\Swarrow                  }{\mathrel}{sw pointing double arrow}%
+\UnicodeMathSymbol{"021DA}{\Lleftarrow               }{\mathrel}{left triple arrow}%
+\UnicodeMathSymbol{"021DB}{\Rrightarrow              }{\mathrel}{right triple arrow}%
+\UnicodeMathSymbol{"021DC}{\leftsquigarrow           }{\mathrel}{leftwards squiggle arrow}%
+\UnicodeMathSymbol{"021DD}{\rightsquigarrow          }{\mathrel}{rightwards squiggle arrow}%
+\UnicodeMathSymbol{"021DE}{\nHuparrow                }{\mathord}{upwards arrow with double stroke}%
+\UnicodeMathSymbol{"021DF}{\nHdownarrow              }{\mathord}{downwards arrow with double stroke}%
+\UnicodeMathSymbol{"021E0}{\leftdasharrow            }{\mathord}{leftwards dashed arrow}%
+\UnicodeMathSymbol{"021E1}{\updasharrow              }{\mathord}{upwards dashed arrow}%
+\UnicodeMathSymbol{"021E2}{\rightdasharrow           }{\mathord}{rightwards dashed arrow}%
+\UnicodeMathSymbol{"021E3}{\downdasharrow            }{\mathord}{downwards dashed arrow}%
+\UnicodeMathSymbol{"021E4}{\barleftarrow             }{\mathrel}{leftwards arrow to bar}%
+\UnicodeMathSymbol{"021E5}{\rightarrowbar            }{\mathrel}{rightwards arrow to bar}%
+\UnicodeMathSymbol{"021E6}{\leftwhitearrow           }{\mathord}{leftwards white arrow}%
+\UnicodeMathSymbol{"021E7}{\upwhitearrow             }{\mathord}{upwards white arrow}%
+\UnicodeMathSymbol{"021E8}{\rightwhitearrow          }{\mathord}{rightwards white arrow}%
+\UnicodeMathSymbol{"021E9}{\downwhitearrow           }{\mathord}{downwards white arrow}%
+\UnicodeMathSymbol{"021EA}{\whitearrowupfrombar      }{\mathord}{upwards white arrow from bar}%
+\UnicodeMathSymbol{"021F4}{\circleonrightarrow       }{\mathrel}{right arrow with small circle}%
+\UnicodeMathSymbol{"021F5}{\downuparrows             }{\mathrel}{downwards arrow leftwards of upwards arrow}%
+\UnicodeMathSymbol{"021F6}{\rightthreearrows         }{\mathrel}{three rightwards arrows}%
+\UnicodeMathSymbol{"021F7}{\nvleftarrow              }{\mathrel}{leftwards arrow with vertical stroke}%
+\UnicodeMathSymbol{"021F8}{\nvrightarrow             }{\mathrel}{rightwards arrow with vertical stroke}%
+\UnicodeMathSymbol{"021F9}{\nvleftrightarrow         }{\mathrel}{left right arrow with vertical stroke}%
+\UnicodeMathSymbol{"021FA}{\nVleftarrow              }{\mathrel}{leftwards arrow with double vertical stroke}%
+\UnicodeMathSymbol{"021FB}{\nVrightarrow             }{\mathrel}{rightwards arrow with double vertical stroke}%
+\UnicodeMathSymbol{"021FC}{\nVleftrightarrow         }{\mathrel}{left right arrow with double vertical stroke}%
+\UnicodeMathSymbol{"021FD}{\leftarrowtriangle        }{\mathrel}{leftwards open-headed arrow}%
+\UnicodeMathSymbol{"021FE}{\rightarrowtriangle       }{\mathrel}{rightwards open-headed arrow}%
+\UnicodeMathSymbol{"021FF}{\leftrightarrowtriangle   }{\mathrel}{left right open-headed arrow}%
+\UnicodeMathSymbol{"02200}{\forall                   }{\mathord}{for all}%
+\UnicodeMathSymbol{"02201}{\complement               }{\mathord}{complement sign}%
+\UnicodeMathSymbol{"02202}{\partial                  }{\mathalpha}{partial differential}%
+\UnicodeMathSymbol{"02203}{\exists                   }{\mathord}{at least one exists}%
+\UnicodeMathSymbol{"02204}{\nexists                  }{\mathord}{negated exists}%
+\UnicodeMathSymbol{"02205}{\varnothing               }{\mathord}{circle, slash}%
+\UnicodeMathSymbol{"02206}{\increment                }{\mathord}{laplacian (delta; nabla\string^2)}%
+\UnicodeMathSymbol{"02207}{\nabla                    }{\mathalpha}{nabla, del, hamilton operator}%
+\UnicodeMathSymbol{"02208}{\in                       }{\mathrel}{set membership, variant}%
+\UnicodeMathSymbol{"02209}{\notin                    }{\mathrel}{negated set membership}%
+\UnicodeMathSymbol{"0220A}{\smallin                  }{\mathrel}{set membership (small set membership)}%
+\UnicodeMathSymbol{"0220B}{\ni                       }{\mathrel}{contains, variant}%
+\UnicodeMathSymbol{"0220C}{\nni                      }{\mathrel}{negated contains, variant}%
+\UnicodeMathSymbol{"0220D}{\smallni                  }{\mathrel}{/ni /owns r: contains (small contains as member)}%
+\UnicodeMathSymbol{"0220E}{\QED                      }{\mathord}{end of proof}%
+\UnicodeMathSymbol{"0220F}{\prod                     }{\mathop}{product operator}%
+\UnicodeMathSymbol{"02210}{\coprod                   }{\mathop}{coproduct operator}%
+\UnicodeMathSymbol{"02211}{\sum                      }{\mathop}{summation operator}%
+\UnicodeMathSymbol{"02212}{\minus                    }{\mathbin}{minus sign}%
+\UnicodeMathSymbol{"02213}{\mp                       }{\mathbin}{minus-or-plus sign}%
+\UnicodeMathSymbol{"02214}{\dotplus                  }{\mathbin}{plus sign, dot above}%
+\UnicodeMathSymbol{"02215}{\divslash                 }{\mathbin}{division slash}%
+\UnicodeMathSymbol{"02216}{\smallsetminus            }{\mathbin}{small set minus (cf. reverse solidus)}%
+\UnicodeMathSymbol{"02217}{\ast                      }{\mathbin}{centered asterisk}%
+\UnicodeMathSymbol{"02218}{\vysmwhtcircle            }{\mathbin}{composite function (small circle)}%
+\UnicodeMathSymbol{"02219}{\vysmblkcircle            }{\mathbin}{bullet operator}%
+\UnicodeMathSymbol{"0221A}{\sqrt                     }{\mathopen}{radical}%
+\UnicodeMathSymbol{"0221A}{\surd                     }{\mathord}{radical}%
+\UnicodeMathSymbol{"0221B}{\cuberoot                 }{\mathopen}{cube root}%
+\UnicodeMathSymbol{"0221C}{\fourthroot               }{\mathopen}{fourth root}%
+\UnicodeMathSymbol{"0221D}{\propto                   }{\mathrel}{is proportional to}%
+\UnicodeMathSymbol{"0221E}{\infty                    }{\mathord}{infinity}%
+\UnicodeMathSymbol{"0221F}{\rightangle               }{\mathord}{right (90 degree) angle}%
+\UnicodeMathSymbol{"02220}{\angle                    }{\mathord}{angle}%
+\UnicodeMathSymbol{"02221}{\measuredangle            }{\mathord}{angle-measured}%
+\UnicodeMathSymbol{"02222}{\sphericalangle           }{\mathord}{angle-spherical}%
+\UnicodeMathSymbol{"02223}{\mid                      }{\mathrel}{/mid r:}%
+\UnicodeMathSymbol{"02224}{\nmid                     }{\mathrel}{negated mid}%
+\UnicodeMathSymbol{"02225}{\parallel                 }{\mathrel}{parallel}%
+\UnicodeMathSymbol{"02226}{\nparallel                }{\mathrel}{not parallel}%
+\UnicodeMathSymbol{"02227}{\wedge                    }{\mathbin}{/wedge /land b: logical and}%
+\UnicodeMathSymbol{"02228}{\vee                      }{\mathbin}{/vee /lor b: logical or}%
+\UnicodeMathSymbol{"02229}{\cap                      }{\mathbin}{intersection}%
+\UnicodeMathSymbol{"0222A}{\cup                      }{\mathbin}{union or logical sum}%
+\UnicodeMathSymbol{"0222B}{\int                      }{\mathop}{integral operator}%
+\UnicodeMathSymbol{"0222C}{\iint                     }{\mathop}{double integral operator}%
+\UnicodeMathSymbol{"0222D}{\iiint                    }{\mathop}{triple integral operator}%
+\UnicodeMathSymbol{"0222E}{\oint                     }{\mathop}{contour integral operator}%
+\UnicodeMathSymbol{"0222F}{\oiint                    }{\mathop}{double contour integral operator}%
+\UnicodeMathSymbol{"02230}{\oiiint                   }{\mathop}{triple contour integral operator}%
+\UnicodeMathSymbol{"02231}{\intclockwise             }{\mathop}{clockwise integral}%
+\UnicodeMathSymbol{"02232}{\varointclockwise         }{\mathop}{contour integral, clockwise}%
+\UnicodeMathSymbol{"02233}{\ointctrclockwise         }{\mathop}{contour integral, anticlockwise}%
+\UnicodeMathSymbol{"02234}{\therefore                }{\mathord}{therefore}%
+\UnicodeMathSymbol{"02235}{\because                  }{\mathord}{because}%
+\UnicodeMathSymbol{"02236}{\mathratio                }{\mathrel}{ratio}%
+\UnicodeMathSymbol{"02237}{\Colon                    }{\mathrel}{two colons}%
+\UnicodeMathSymbol{"02238}{\dotminus                 }{\mathbin}{minus sign, dot above}%
+\UnicodeMathSymbol{"02239}{\dashcolon                }{\mathrel}{excess (-:)}%
+\UnicodeMathSymbol{"0223A}{\dotsminusdots            }{\mathrel}{minus with four dots, geometric properties}%
+\UnicodeMathSymbol{"0223B}{\kernelcontraction        }{\mathrel}{homothetic}%
+\UnicodeMathSymbol{"0223C}{\sim                      }{\mathrel}{similar}%
+\UnicodeMathSymbol{"0223D}{\backsim                  }{\mathrel}{reverse similar}%
+\UnicodeMathSymbol{"0223E}{\invlazys                 }{\mathbin}{most positive [inverted lazy s]}%
+\UnicodeMathSymbol{"0223F}{\sinewave                 }{\mathord}{sine wave}%
+\UnicodeMathSymbol{"02240}{\wr                       }{\mathbin}{wreath product}%
+\UnicodeMathSymbol{"02241}{\nsim                     }{\mathrel}{not similar}%
+\UnicodeMathSymbol{"02242}{\eqsim                    }{\mathrel}{equals, similar}%
+\UnicodeMathSymbol{"02243}{\simeq                    }{\mathrel}{similar, equals}%
+\UnicodeMathSymbol{"02244}{\nsime                    }{\mathrel}{not similar, equals}%
+\UnicodeMathSymbol{"02243}{\sime                     }{\mathrel}{similar, equals (alias)}%
+\UnicodeMathSymbol{"02244}{\nsimeq                   }{\mathrel}{not similar, equals (alias)}%
+\UnicodeMathSymbol{"02245}{\cong                     }{\mathrel}{congruent with}%
+\UnicodeMathSymbol{"02246}{\simneqq                  }{\mathrel}{similar, not equals [vert only for 9573 entity]}%
+\UnicodeMathSymbol{"02247}{\ncong                    }{\mathrel}{not congruent with}%
+\UnicodeMathSymbol{"02248}{\approx                   }{\mathrel}{approximate}%
+\UnicodeMathSymbol{"02249}{\napprox                  }{\mathrel}{not approximate}%
+\UnicodeMathSymbol{"0224A}{\approxeq                 }{\mathrel}{approximate, equals}%
+\UnicodeMathSymbol{"0224B}{\approxident              }{\mathrel}{approximately identical to}%
+\UnicodeMathSymbol{"0224C}{\backcong                 }{\mathrel}{all equal to}%
+\UnicodeMathSymbol{"0224D}{\asymp                    }{\mathrel}{asymptotically equal to}%
+\UnicodeMathSymbol{"0224E}{\Bumpeq                   }{\mathrel}{bumpy equals}%
+\UnicodeMathSymbol{"0224F}{\bumpeq                   }{\mathrel}{bumpy equals, equals}%
+\UnicodeMathSymbol{"02250}{\doteq                    }{\mathrel}{equals, single dot above}%
+\UnicodeMathSymbol{"02251}{\Doteq                    }{\mathrel}{/doteqdot /doteq r: equals, even dots}%
+\UnicodeMathSymbol{"02252}{\fallingdotseq            }{\mathrel}{equals, falling dots}%
+\UnicodeMathSymbol{"02253}{\risingdotseq             }{\mathrel}{equals, rising dots}%
+\UnicodeMathSymbol{"02254}{\coloneq                  }{\mathrel}{colon, equals}%
+\UnicodeMathSymbol{"02255}{\eqcolon                  }{\mathrel}{equals, colon}%
+\UnicodeMathSymbol{"02256}{\eqcirc                   }{\mathrel}{circle on equals sign}%
+\UnicodeMathSymbol{"02257}{\circeq                   }{\mathrel}{circle, equals}%
+\UnicodeMathSymbol{"02258}{\arceq                    }{\mathrel}{arc, equals; corresponds to}%
+\UnicodeMathSymbol{"02259}{\wedgeq                   }{\mathrel}{corresponds to (wedge, equals)}%
+\UnicodeMathSymbol{"0225A}{\veeeq                    }{\mathrel}{logical or, equals}%
+\UnicodeMathSymbol{"0225B}{\stareq                   }{\mathrel}{star equals}%
+\UnicodeMathSymbol{"0225C}{\triangleq                }{\mathrel}{triangle, equals}%
+\UnicodeMathSymbol{"0225D}{\eqdef                    }{\mathrel}{equals by definition}%
+\UnicodeMathSymbol{"0225E}{\measeq                   }{\mathrel}{measured by (m over equals)}%
+\UnicodeMathSymbol{"0225F}{\questeq                  }{\mathrel}{equal with questionmark}%
+\UnicodeMathSymbol{"02260}{\ne                       }{\mathrel}{/ne /neq r: not equal}%
+\UnicodeMathSymbol{"02261}{\equiv                    }{\mathrel}{identical with}%
+\UnicodeMathSymbol{"02262}{\nequiv                   }{\mathrel}{not identical with}%
+\UnicodeMathSymbol{"02263}{\Equiv                    }{\mathrel}{strict equivalence (4 lines)}%
+\UnicodeMathSymbol{"02264}{\leq                      }{\mathrel}{/leq /le r: less-than-or-equal}%
+\UnicodeMathSymbol{"02265}{\geq                      }{\mathrel}{/geq /ge r: greater-than-or-equal}%
+\UnicodeMathSymbol{"02266}{\leqq                     }{\mathrel}{less, double equals}%
+\UnicodeMathSymbol{"02267}{\geqq                     }{\mathrel}{greater, double equals}%
+\UnicodeMathSymbol{"02268}{\lneqq                    }{\mathrel}{less, not double equals}%
+\UnicodeMathSymbol{"02269}{\gneqq                    }{\mathrel}{greater, not double equals}%
+\UnicodeMathSymbol{"0226A}{\ll                       }{\mathrel}{much less than, type 2}%
+\UnicodeMathSymbol{"0226B}{\gg                       }{\mathrel}{much greater than, type 2}%
+\UnicodeMathSymbol{"0226C}{\between                  }{\mathrel}{between}%
+\UnicodeMathSymbol{"0226D}{\nasymp                   }{\mathrel}{not asymptotically equal to}%
+\UnicodeMathSymbol{"0226E}{\nless                    }{\mathrel}{not less-than}%
+\UnicodeMathSymbol{"0226F}{\ngtr                     }{\mathrel}{not greater-than}%
+\UnicodeMathSymbol{"02270}{\nleq                     }{\mathrel}{not less-than-or-equal}%
+\UnicodeMathSymbol{"02271}{\ngeq                     }{\mathrel}{not greater-than-or-equal}%
+\UnicodeMathSymbol{"02272}{\lesssim                  }{\mathrel}{less, similar}%
+\UnicodeMathSymbol{"02273}{\gtrsim                   }{\mathrel}{greater, similar}%
+\UnicodeMathSymbol{"02274}{\nlesssim                 }{\mathrel}{not less, similar}%
+\UnicodeMathSymbol{"02275}{\ngtrsim                  }{\mathrel}{not greater, similar}%
+\UnicodeMathSymbol{"02276}{\lessgtr                  }{\mathrel}{less, greater}%
+\UnicodeMathSymbol{"02277}{\gtrless                  }{\mathrel}{greater, less}%
+\UnicodeMathSymbol{"02278}{\nlessgtr                 }{\mathrel}{not less, greater}%
+\UnicodeMathSymbol{"02279}{\ngtrless                 }{\mathrel}{not greater, less}%
+\UnicodeMathSymbol{"0227A}{\prec                     }{\mathrel}{precedes}%
+\UnicodeMathSymbol{"0227B}{\succ                     }{\mathrel}{succeeds}%
+\UnicodeMathSymbol{"0227C}{\preccurlyeq              }{\mathrel}{precedes, curly equals}%
+\UnicodeMathSymbol{"0227D}{\succcurlyeq              }{\mathrel}{succeeds, curly equals}%
+\UnicodeMathSymbol{"0227E}{\precsim                  }{\mathrel}{precedes, similar}%
+\UnicodeMathSymbol{"0227F}{\succsim                  }{\mathrel}{succeeds, similar}%
+\UnicodeMathSymbol{"02280}{\nprec                    }{\mathrel}{not precedes}%
+\UnicodeMathSymbol{"02281}{\nsucc                    }{\mathrel}{not succeeds}%
+\UnicodeMathSymbol{"02282}{\subset                   }{\mathrel}{subset or is implied by}%
+\UnicodeMathSymbol{"02283}{\supset                   }{\mathrel}{superset or implies}%
+\UnicodeMathSymbol{"02284}{\nsubset                  }{\mathrel}{not subset, variant [slash negation]}%
+\UnicodeMathSymbol{"02285}{\nsupset                  }{\mathrel}{not superset, variant [slash negation]}%
+\UnicodeMathSymbol{"02286}{\subseteq                 }{\mathrel}{subset, equals}%
+\UnicodeMathSymbol{"02287}{\supseteq                 }{\mathrel}{superset, equals}%
+\UnicodeMathSymbol{"02288}{\nsubseteq                }{\mathrel}{not subset, equals}%
+\UnicodeMathSymbol{"02289}{\nsupseteq                }{\mathrel}{not superset, equals}%
+\UnicodeMathSymbol{"0228A}{\subsetneq                }{\mathrel}{subset, not equals}%
+\UnicodeMathSymbol{"0228B}{\supsetneq                }{\mathrel}{superset, not equals}%
+\UnicodeMathSymbol{"0228C}{\cupleftarrow             }{\mathbin}{multiset}%
+\UnicodeMathSymbol{"0228D}{\cupdot                   }{\mathbin}{union, with dot}%
+\UnicodeMathSymbol{"0228E}{\uplus                    }{\mathbin}{plus sign in union}%
+\UnicodeMathSymbol{"0228F}{\sqsubset                 }{\mathrel}{square subset}%
+\UnicodeMathSymbol{"02290}{\sqsupset                 }{\mathrel}{square superset}%
+\UnicodeMathSymbol{"02291}{\sqsubseteq               }{\mathrel}{square subset, equals}%
+\UnicodeMathSymbol{"02292}{\sqsupseteq               }{\mathrel}{square superset, equals}%
+\UnicodeMathSymbol{"02293}{\sqcap                    }{\mathbin}{square intersection}%
+\UnicodeMathSymbol{"02294}{\sqcup                    }{\mathbin}{square union}%
+\UnicodeMathSymbol{"02295}{\oplus                    }{\mathbin}{plus sign in circle}%
+\UnicodeMathSymbol{"02296}{\ominus                   }{\mathbin}{minus sign in circle}%
+\UnicodeMathSymbol{"02297}{\otimes                   }{\mathbin}{multiply sign in circle}%
+\UnicodeMathSymbol{"02298}{\oslash                   }{\mathbin}{solidus in circle}%
+\UnicodeMathSymbol{"02299}{\odot                     }{\mathbin}{middle dot in circle}%
+\UnicodeMathSymbol{"0229A}{\circledcirc              }{\mathbin}{small circle in circle}%
+\UnicodeMathSymbol{"0229B}{\circledast               }{\mathbin}{asterisk in circle}%
+\UnicodeMathSymbol{"0229C}{\circledequal             }{\mathbin}{equal in circle}%
+\UnicodeMathSymbol{"0229D}{\circleddash              }{\mathbin}{hyphen in circle}%
+\UnicodeMathSymbol{"0229E}{\boxplus                  }{\mathbin}{plus sign in box}%
+\UnicodeMathSymbol{"0229F}{\boxminus                 }{\mathbin}{minus sign in box}%
+\UnicodeMathSymbol{"022A0}{\boxtimes                 }{\mathbin}{multiply sign in box}%
+\UnicodeMathSymbol{"022A1}{\boxdot                   }{\mathbin}{/dotsquare /boxdot b: small dot in box}%
+\UnicodeMathSymbol{"022A2}{\vdash                    }{\mathrel}{vertical, dash}%
+\UnicodeMathSymbol{"022A3}{\dashv                    }{\mathrel}{dash, vertical}%
+\UnicodeMathSymbol{"022A4}{\top                      }{\mathord}{top}%
+\UnicodeMathSymbol{"022A5}{\bot                      }{\mathord}{bottom}%
+\UnicodeMathSymbol{"022A6}{\assert                   }{\mathrel}{assertion (vertical, short dash)}%
+\UnicodeMathSymbol{"022A7}{\models                   }{\mathrel}{models (vertical, short double dash)}%
+\UnicodeMathSymbol{"022A8}{\vDash                    }{\mathrel}{vertical, double dash}%
+\UnicodeMathSymbol{"022A9}{\Vdash                    }{\mathrel}{double vertical, dash}%
+\UnicodeMathSymbol{"022AA}{\Vvdash                   }{\mathrel}{triple vertical, dash}%
+\UnicodeMathSymbol{"022AB}{\VDash                    }{\mathrel}{double vert, double dash}%
+\UnicodeMathSymbol{"022AC}{\nvdash                   }{\mathrel}{not vertical, dash}%
+\UnicodeMathSymbol{"022AD}{\nvDash                   }{\mathrel}{not vertical, double dash}%
+\UnicodeMathSymbol{"022AE}{\nVdash                   }{\mathrel}{not double vertical, dash}%
+\UnicodeMathSymbol{"022AF}{\nVDash                   }{\mathrel}{not double vert, double dash}%
+\UnicodeMathSymbol{"022B0}{\prurel                   }{\mathrel}{element precedes under relation}%
+\UnicodeMathSymbol{"022B1}{\scurel                   }{\mathrel}{succeeds under relation}%
+\UnicodeMathSymbol{"022B2}{\vartriangleleft          }{\mathrel}{left triangle, open, variant}%
+\UnicodeMathSymbol{"022B3}{\vartriangleright         }{\mathrel}{right triangle, open, variant}%
+\UnicodeMathSymbol{"022B4}{\trianglelefteq           }{\mathrel}{left triangle, equals}%
+\UnicodeMathSymbol{"022B5}{\trianglerighteq          }{\mathrel}{right triangle, equals}%
+\UnicodeMathSymbol{"022B6}{\origof                   }{\mathrel}{original of}%
+\UnicodeMathSymbol{"022B7}{\imageof                  }{\mathrel}{image of}%
+\UnicodeMathSymbol{"022B8}{\multimap                 }{\mathrel}{/multimap a:}%
+\UnicodeMathSymbol{"022B9}{\hermitmatrix             }{\mathord}{hermitian conjugate matrix}%
+\UnicodeMathSymbol{"022BA}{\intercal                 }{\mathbin}{intercal}%
+\UnicodeMathSymbol{"022BB}{\veebar                   }{\mathbin}{logical or, bar below (large vee); exclusive disjunction}%
+\UnicodeMathSymbol{"022BC}{\barwedge                 }{\mathbin}{bar, wedge (large wedge)}%
+\UnicodeMathSymbol{"022BD}{\barvee                   }{\mathbin}{bar, vee (large vee)}%
+\UnicodeMathSymbol{"022BE}{\measuredrightangle       }{\mathord}{right angle-measured [with arc]}%
+\UnicodeMathSymbol{"022BF}{\varlrtriangle            }{\mathord}{right triangle}%
+\UnicodeMathSymbol{"022C0}{\bigwedge                 }{\mathop}{logical and operator}%
+\UnicodeMathSymbol{"022C1}{\bigvee                   }{\mathop}{logical or operator}%
+\UnicodeMathSymbol{"022C2}{\bigcap                   }{\mathop}{intersection operator}%
+\UnicodeMathSymbol{"022C3}{\bigcup                   }{\mathop}{union operator}%
+\UnicodeMathSymbol{"022C4}{\smwhtdiamond             }{\mathbin}{white diamond}%
+\UnicodeMathSymbol{"022C5}{\cdot                     }{\mathbin}{small middle dot}%
+\UnicodeMathSymbol{"022C6}{\star                     }{\mathbin}{small star, filled, low}%
+\UnicodeMathSymbol{"022C7}{\divideontimes            }{\mathbin}{division on times}%
+\UnicodeMathSymbol{"022C8}{\bowtie                   }{\mathrel}{bowtie}%
+\UnicodeMathSymbol{"022C9}{\ltimes                   }{\mathbin}{times sign, left closed}%
+\UnicodeMathSymbol{"022CA}{\rtimes                   }{\mathbin}{times sign, right closed}%
+\UnicodeMathSymbol{"022CB}{\leftthreetimes           }{\mathbin}{left semidirect product}%
+\UnicodeMathSymbol{"022CC}{\rightthreetimes          }{\mathbin}{right semidirect product}%
+\UnicodeMathSymbol{"022CD}{\backsimeq                }{\mathrel}{reverse similar, equals}%
+\UnicodeMathSymbol{"022CE}{\curlyvee                 }{\mathbin}{curly logical or}%
+\UnicodeMathSymbol{"022CF}{\curlywedge               }{\mathbin}{curly logical and}%
+\UnicodeMathSymbol{"022D0}{\Subset                   }{\mathrel}{double subset}%
+\UnicodeMathSymbol{"022D1}{\Supset                   }{\mathrel}{double superset}%
+\UnicodeMathSymbol{"022D2}{\Cap                      }{\mathbin}{/cap /doublecap b: double intersection}%
+\UnicodeMathSymbol{"022D3}{\Cup                      }{\mathbin}{/cup /doublecup b: double union}%
+\UnicodeMathSymbol{"022D4}{\pitchfork                }{\mathrel}{pitchfork}%
+\UnicodeMathSymbol{"022D5}{\equalparallel            }{\mathrel}{parallel, equal; equal or parallel}%
+\UnicodeMathSymbol{"022D6}{\lessdot                  }{\mathrel}{less than, with dot}%
+\UnicodeMathSymbol{"022D7}{\gtrdot                   }{\mathrel}{greater than, with dot}%
+\UnicodeMathSymbol{"022D8}{\lll                      }{\mathrel}{/ll /lll /llless r: triple less-than}%
+\UnicodeMathSymbol{"022D9}{\ggg                      }{\mathrel}{/ggg /gg /gggtr r: triple greater-than}%
+\UnicodeMathSymbol{"022DA}{\lesseqgtr                }{\mathrel}{less, equals, greater}%
+\UnicodeMathSymbol{"022DB}{\gtreqless                }{\mathrel}{greater, equals, less}%
+\UnicodeMathSymbol{"022DC}{\eqless                   }{\mathrel}{equal-or-less}%
+\UnicodeMathSymbol{"022DD}{\eqgtr                    }{\mathrel}{equal-or-greater}%
+\UnicodeMathSymbol{"022DE}{\curlyeqprec              }{\mathrel}{curly equals, precedes}%
+\UnicodeMathSymbol{"022DF}{\curlyeqsucc              }{\mathrel}{curly equals, succeeds}%
+\UnicodeMathSymbol{"022E0}{\npreccurlyeq             }{\mathrel}{not precedes, curly equals}%
+\UnicodeMathSymbol{"022E1}{\nsucccurlyeq             }{\mathrel}{not succeeds, curly equals}%
+\UnicodeMathSymbol{"022E2}{\nsqsubseteq              }{\mathrel}{not, square subset, equals}%
+\UnicodeMathSymbol{"022E3}{\nsqsupseteq              }{\mathrel}{not, square superset, equals}%
+\UnicodeMathSymbol{"022E4}{\sqsubsetneq              }{\mathrel}{square subset, not equals}%
+\UnicodeMathSymbol{"022E5}{\sqsupsetneq              }{\mathrel}{square superset, not equals}%
+\UnicodeMathSymbol{"022E6}{\lnsim                    }{\mathrel}{less, not similar}%
+\UnicodeMathSymbol{"022E7}{\gnsim                    }{\mathrel}{greater, not similar}%
+\UnicodeMathSymbol{"022E8}{\precnsim                 }{\mathrel}{precedes, not similar}%
+\UnicodeMathSymbol{"022E9}{\succnsim                 }{\mathrel}{succeeds, not similar}%
+\UnicodeMathSymbol{"022EA}{\nvartriangleleft         }{\mathrel}{not left triangle}%
+\UnicodeMathSymbol{"022EB}{\nvartriangleright        }{\mathrel}{not right triangle}%
+\UnicodeMathSymbol{"022EC}{\ntrianglelefteq          }{\mathrel}{not left triangle, equals}%
+\UnicodeMathSymbol{"022ED}{\ntrianglerighteq         }{\mathrel}{not right triangle, equals}%
+\UnicodeMathSymbol{"022EE}{\unicodevdots             }{\mathrel}{vertical ellipsis}%
+\UnicodeMathSymbol{"022EF}{\unicodecdots             }{\mathord}{three dots, centered}%
+\UnicodeMathSymbol{"022F0}{\unicodeadots             }{\mathrel}{three dots, ascending}%
+\UnicodeMathSymbol{"022F1}{\unicodeddots             }{\mathrel}{three dots, descending}%
+\UnicodeMathSymbol{"022F2}{\disin                    }{\mathrel}{element of with long horizontal stroke}%
+\UnicodeMathSymbol{"022F3}{\varisins                 }{\mathrel}{element of with vertical bar at end of horizontal stroke}%
+\UnicodeMathSymbol{"022F4}{\isins                    }{\mathrel}{small element of with vertical bar at end of horizontal stroke}%
+\UnicodeMathSymbol{"022F5}{\isindot                  }{\mathrel}{element of with dot above}%
+\UnicodeMathSymbol{"022F6}{\varisinobar              }{\mathrel}{element of with overbar}%
+\UnicodeMathSymbol{"022F7}{\isinobar                 }{\mathrel}{small element of with overbar}%
+\UnicodeMathSymbol{"022F8}{\isinvb                   }{\mathrel}{element of with underbar}%
+\UnicodeMathSymbol{"022F9}{\isinE                    }{\mathrel}{element of with two horizontal strokes}%
+\UnicodeMathSymbol{"022FA}{\nisd                     }{\mathrel}{contains with long horizontal stroke}%
+\UnicodeMathSymbol{"022FB}{\varnis                   }{\mathrel}{contains with vertical bar at end of horizontal stroke}%
+\UnicodeMathSymbol{"022FC}{\nis                      }{\mathrel}{small contains with vertical bar at end of horizontal stroke}%
+\UnicodeMathSymbol{"022FD}{\varniobar                }{\mathrel}{contains with overbar}%
+\UnicodeMathSymbol{"022FE}{\niobar                   }{\mathrel}{small contains with overbar}%
+\UnicodeMathSymbol{"022FF}{\bagmember                }{\mathrel}{z notation bag membership}%
+\UnicodeMathSymbol{"02300}{\diameter                 }{\mathord}{diameter sign}%
+\UnicodeMathSymbol{"02302}{\house                    }{\mathord}{house}%
+\UnicodeMathSymbol{"02305}{\varbarwedge              }{\mathbin}{/barwedge b: logical and, bar above [projective (bar over small wedge)]}%
+\UnicodeMathSymbol{"02306}{\vardoublebarwedge        }{\mathbin}{/doublebarwedge b: logical and, double bar above [perspective (double bar over small wedge)]}%
+\UnicodeMathSymbol{"02308}{\lceil                    }{\mathopen}{left ceiling}%
+\UnicodeMathSymbol{"02309}{\rceil                    }{\mathclose}{right ceiling}%
+\UnicodeMathSymbol{"0230A}{\lfloor                   }{\mathopen}{left floor}%
+\UnicodeMathSymbol{"0230B}{\rfloor                   }{\mathclose}{right floor}%
+\UnicodeMathSymbol{"02310}{\invnot                   }{\mathord}{reverse not}%
+\UnicodeMathSymbol{"02311}{\sqlozenge                }{\mathord}{square lozenge}%
+\UnicodeMathSymbol{"02312}{\profline                 }{\mathord}{profile of a line}%
+\UnicodeMathSymbol{"02313}{\profsurf                 }{\mathord}{profile of a surface}%
+\UnicodeMathSymbol{"02317}{\viewdata                 }{\mathord}{viewdata square}%
+\UnicodeMathSymbol{"02319}{\turnednot                }{\mathord}{turned not sign}%
+\UnicodeMathSymbol{"0231C}{\ulcorner                 }{\mathopen}{upper left corner}%
+\UnicodeMathSymbol{"0231D}{\urcorner                 }{\mathclose}{upper right corner}%
+\UnicodeMathSymbol{"0231E}{\llcorner                 }{\mathopen}{lower left corner}%
+\UnicodeMathSymbol{"0231F}{\lrcorner                 }{\mathclose}{lower right corner}%
+\UnicodeMathSymbol{"02320}{\inttop                   }{\mathord}{top half integral}%
+\UnicodeMathSymbol{"02321}{\intbottom                }{\mathord}{bottom half integral}%
+\UnicodeMathSymbol{"02322}{\frown                    }{\mathrel}{down curve}%
+\UnicodeMathSymbol{"02323}{\smile                    }{\mathrel}{up curve}%
+\UnicodeMathSymbol{"0232C}{\varhexagonlrbonds        }{\mathord}{six carbon ring, corner down, double bonds lower right etc}%
+\UnicodeMathSymbol{"02332}{\conictaper               }{\mathord}{conical taper }%
+\UnicodeMathSymbol{"02336}{\topbot                   }{\mathord}{top and bottom}%
+\UnicodeMathSymbol{"0233D}{\obar                     }{\mathbin}{circle with vertical bar}%
+\UnicodeMathSymbol{"0233F}{\APLnotslash              }{\mathrel}{solidus, bar through (apl functional symbol slash bar)}%
+\UnicodeMathSymbol{"02340}{\APLnotbackslash          }{\mathord}{apl functional symbol backslash bar}%
+\UnicodeMathSymbol{"02353}{\APLboxupcaret            }{\mathord}{boxed up caret}%
+\UnicodeMathSymbol{"02370}{\APLboxquestion           }{\mathord}{boxed question mark}%
+\UnicodeMathSymbol{"0237C}{\rangledownzigzagarrow    }{\mathord}{right angle with downwards zigzag arrow}%
+\UnicodeMathSymbol{"02394}{\hexagon                  }{\mathord}{horizontal benzene ring [hexagon flat open]}%
+\UnicodeMathSymbol{"0239B}{\lparenuend               }{\mathord}{left parenthesis upper hook}%
+\UnicodeMathSymbol{"0239C}{\lparenextender           }{\mathord}{left parenthesis extension}%
+\UnicodeMathSymbol{"0239D}{\lparenlend               }{\mathord}{left parenthesis lower hook}%
+\UnicodeMathSymbol{"0239E}{\rparenuend               }{\mathord}{right parenthesis upper hook}%
+\UnicodeMathSymbol{"0239F}{\rparenextender           }{\mathord}{right parenthesis extension}%
+\UnicodeMathSymbol{"023A0}{\rparenlend               }{\mathord}{right parenthesis lower hook}%
+\UnicodeMathSymbol{"023A1}{\lbrackuend               }{\mathord}{left square bracket upper corner}%
+\UnicodeMathSymbol{"023A2}{\lbrackextender           }{\mathord}{left square bracket extension}%
+\UnicodeMathSymbol{"023A3}{\lbracklend               }{\mathord}{left square bracket lower corner}%
+\UnicodeMathSymbol{"023A4}{\rbrackuend               }{\mathord}{right square bracket upper corner}%
+\UnicodeMathSymbol{"023A5}{\rbrackextender           }{\mathord}{right square bracket extension}%
+\UnicodeMathSymbol{"023A6}{\rbracklend               }{\mathord}{right square bracket lower corner}%
+\UnicodeMathSymbol{"023A7}{\lbraceuend               }{\mathord}{left curly bracket upper hook}%
+\UnicodeMathSymbol{"023A8}{\lbracemid                }{\mathord}{left curly bracket middle piece}%
+\UnicodeMathSymbol{"023A9}{\lbracelend               }{\mathord}{left curly bracket lower hook}%
+\UnicodeMathSymbol{"023AA}{\vbraceextender           }{\mathord}{curly bracket extension}%
+\UnicodeMathSymbol{"023AB}{\rbraceuend               }{\mathord}{right curly bracket upper hook}%
+\UnicodeMathSymbol{"023AC}{\rbracemid                }{\mathord}{right curly bracket middle piece}%
+\UnicodeMathSymbol{"023AD}{\rbracelend               }{\mathord}{right curly bracket lower hook}%
+\UnicodeMathSymbol{"023AE}{\intextender              }{\mathord}{integral extension}%
+\UnicodeMathSymbol{"023AF}{\harrowextender           }{\mathord}{horizontal line extension (used to extend arrows)}%
+\UnicodeMathSymbol{"023B0}{\lmoustache               }{\mathopen}{upper left or lower right curly bracket section}%
+\UnicodeMathSymbol{"023B1}{\rmoustache               }{\mathclose}{upper right or lower left curly bracket section}%
+\UnicodeMathSymbol{"023B2}{\sumtop                   }{\mathord}{summation top}%
+\UnicodeMathSymbol{"023B3}{\sumbottom                }{\mathord}{summation bottom}%
+\UnicodeMathSymbol{"023B4}{\overbracket              }{\mathover}{top square bracket}%
+\UnicodeMathSymbol{"023B5}{\underbracket             }{\mathunder}{bottom square bracket}%
+\UnicodeMathSymbol{"023B6}{\bbrktbrk                 }{\mathord}{bottom square bracket over top square bracket}%
+\UnicodeMathSymbol{"023B7}{\sqrtbottom               }{\mathord}{radical symbol bottom}%
+\UnicodeMathSymbol{"023B8}{\lvboxline                }{\mathord}{left vertical box line}%
+\UnicodeMathSymbol{"023B9}{\rvboxline                }{\mathord}{right vertical box line}%
+\UnicodeMathSymbol{"023CE}{\varcarriagereturn        }{\mathord}{return symbol}%
+\UnicodeMathSymbol{"023DC}{\overparen                }{\mathover}{top parenthesis (mathematical use)}%
+\UnicodeMathSymbol{"023DD}{\underparen               }{\mathunder}{bottom parenthesis (mathematical use)}%
+\UnicodeMathSymbol{"023DE}{\overbrace                }{\mathover}{top curly bracket (mathematical use)}%
+\UnicodeMathSymbol{"023DF}{\underbrace               }{\mathunder}{bottom curly bracket (mathematical use)}%
+\UnicodeMathSymbol{"023E0}{\obrbrak                  }{\mathord}{top tortoise shell bracket (mathematical use)}%
+\UnicodeMathSymbol{"023E1}{\ubrbrak                  }{\mathord}{bottom tortoise shell bracket (mathematical use)}%
+\UnicodeMathSymbol{"023E2}{\trapezium                }{\mathord}{white trapezium}%
+\UnicodeMathSymbol{"023E3}{\benzenr                  }{\mathord}{benzene ring with circle}%
+\UnicodeMathSymbol{"023E4}{\strns                    }{\mathord}{straightness}%
+\UnicodeMathSymbol{"023E5}{\fltns                    }{\mathord}{flatness}%
+\UnicodeMathSymbol{"023E6}{\accurrent                }{\mathord}{ac current}%
+\UnicodeMathSymbol{"023E7}{\elinters                 }{\mathord}{electrical intersection}%
+\UnicodeMathSymbol{"02422}{\blanksymbol              }{\mathord}{blank symbol}%
+\UnicodeMathSymbol{"02423}{\mathvisiblespace         }{\mathord}{open box}%
+\UnicodeMathSymbol{"02506}{\bdtriplevdash            }{\mathord}{doubly broken vert}%
+\UnicodeMathSymbol{"02580}{\blockuphalf              }{\mathord}{upper half block}%
+\UnicodeMathSymbol{"02584}{\blocklowhalf             }{\mathord}{lower half block}%
+\UnicodeMathSymbol{"02588}{\blockfull                }{\mathord}{full block}%
+\UnicodeMathSymbol{"0258C}{\blocklefthalf            }{\mathord}{left half block}%
+\UnicodeMathSymbol{"02590}{\blockrighthalf           }{\mathord}{right half block}%
+\UnicodeMathSymbol{"02591}{\blockqtrshaded           }{\mathord}{25\% shaded block}%
+\UnicodeMathSymbol{"02592}{\blockhalfshaded          }{\mathord}{50\% shaded block}%
+\UnicodeMathSymbol{"02593}{\blockthreeqtrshaded      }{\mathord}{75\% shaded block}%
+\UnicodeMathSymbol{"025A0}{\mdlgblksquare            }{\mathord}{square, filled}%
+\UnicodeMathSymbol{"025A1}{\mdlgwhtsquare            }{\mathord}{square, open}%
+\UnicodeMathSymbol{"025A2}{\squoval                  }{\mathord}{white square with rounded corners}%
+\UnicodeMathSymbol{"025A3}{\blackinwhitesquare       }{\mathord}{white square containing black small square}%
+\UnicodeMathSymbol{"025A4}{\squarehfill              }{\mathord}{square, horizontal rule filled}%
+\UnicodeMathSymbol{"025A5}{\squarevfill              }{\mathord}{square, vertical rule filled}%
+\UnicodeMathSymbol{"025A6}{\squarehvfill             }{\mathord}{square with orthogonal crosshatch fill}%
+\UnicodeMathSymbol{"025A7}{\squarenwsefill           }{\mathord}{square, nw-to-se rule filled}%
+\UnicodeMathSymbol{"025A8}{\squareneswfill           }{\mathord}{square, ne-to-sw rule filled}%
+\UnicodeMathSymbol{"025A9}{\squarecrossfill          }{\mathord}{square with diagonal crosshatch fill}%
+\UnicodeMathSymbol{"025AA}{\smblksquare              }{\mathord}{/blacksquare - sq bullet, filled}%
+\UnicodeMathSymbol{"025AB}{\smwhtsquare              }{\mathord}{white small square}%
+\UnicodeMathSymbol{"025AC}{\hrectangleblack          }{\mathord}{black rectangle}%
+\UnicodeMathSymbol{"025AD}{\hrectangle               }{\mathord}{horizontal rectangle, open}%
+\UnicodeMathSymbol{"025AE}{\vrectangleblack          }{\mathord}{black vertical rectangle}%
+\UnicodeMathSymbol{"025AF}{\vrectangle               }{\mathord}{rectangle, white (vertical)}%
+\UnicodeMathSymbol{"025B0}{\parallelogramblack       }{\mathord}{black parallelogram}%
+\UnicodeMathSymbol{"025B1}{\parallelogram            }{\mathord}{parallelogram, open}%
+\UnicodeMathSymbol{"025B2}{\bigblacktriangleup       }{\mathord}{black up-pointing triangle}%
+\UnicodeMathSymbol{"025B3}{\bigtriangleup            }{\mathbin}{big up triangle, open}%
+\UnicodeMathSymbol{"025B4}{\blacktriangle            }{\mathord}{up triangle, filled}%
+\UnicodeMathSymbol{"025B5}{\vartriangle              }{\mathrel}{/triangle - up triangle, open}%
+\UnicodeMathSymbol{"025B6}{\blacktriangleright       }{\mathord}{(large) right triangle, filled}%
+\UnicodeMathSymbol{"025B7}{\triangleright            }{\mathbin}{(large) right triangle, open; z notation range restriction}%
+\UnicodeMathSymbol{"025B8}{\smallblacktriangleright  }{\mathord}{right triangle, filled}%
+\UnicodeMathSymbol{"025B9}{\smalltriangleright       }{\mathord}{right triangle, open}%
+\UnicodeMathSymbol{"025BA}{\blackpointerright        }{\mathord}{black right-pointing pointer}%
+\UnicodeMathSymbol{"025BB}{\whitepointerright        }{\mathord}{white right-pointing pointer}%
+\UnicodeMathSymbol{"025BC}{\bigblacktriangledown     }{\mathord}{big down triangle, filled}%
+\UnicodeMathSymbol{"025BD}{\bigtriangledown          }{\mathord}{big down triangle, open}%
+\UnicodeMathSymbol{"025BE}{\blacktriangledown        }{\mathord}{down triangle, filled}%
+\UnicodeMathSymbol{"025BF}{\triangledown             }{\mathord}{down triangle, open}%
+\UnicodeMathSymbol{"025C0}{\blacktriangleleft        }{\mathord}{(large) left triangle, filled}%
+\UnicodeMathSymbol{"025C1}{\triangleleft             }{\mathbin}{(large) left triangle, open; z notation domain restriction}%
+\UnicodeMathSymbol{"025C2}{\smallblacktriangleleft   }{\mathord}{left triangle, filled}%
+\UnicodeMathSymbol{"025C3}{\smalltriangleleft        }{\mathord}{left triangle, open}%
+\UnicodeMathSymbol{"025C4}{\blackpointerleft         }{\mathord}{black left-pointing pointer}%
+\UnicodeMathSymbol{"025C5}{\whitepointerleft         }{\mathord}{white left-pointing pointer}%
+\UnicodeMathSymbol{"025C6}{\mdlgblkdiamond           }{\mathord}{black diamond}%
+\UnicodeMathSymbol{"025C7}{\mdlgwhtdiamond           }{\mathord}{white diamond; diamond, open}%
+\UnicodeMathSymbol{"025C8}{\blackinwhitediamond      }{\mathord}{white diamond containing black small diamond}%
+\UnicodeMathSymbol{"025C9}{\fisheye                  }{\mathord}{fisheye}%
+\UnicodeMathSymbol{"025CA}{\mdlgwhtlozenge           }{\mathord}{lozenge or total mark}%
+\UnicodeMathSymbol{"025CB}{\mdlgwhtcircle            }{\mathbin}{medium large circle}%
+\UnicodeMathSymbol{"025CC}{\dottedcircle             }{\mathord}{dotted circle}%
+\UnicodeMathSymbol{"025CD}{\circlevertfill           }{\mathord}{circle with vertical fill}%
+\UnicodeMathSymbol{"025CE}{\bullseye                 }{\mathord}{bullseye}%
+\UnicodeMathSymbol{"025CF}{\mdlgblkcircle            }{\mathord}{circle, filled}%
+\UnicodeMathSymbol{"025D0}{\circlelefthalfblack      }{\mathord}{circle, filled left half [harvey ball]}%
+\UnicodeMathSymbol{"025D1}{\circlerighthalfblack     }{\mathord}{circle, filled right half}%
+\UnicodeMathSymbol{"025D2}{\circlebottomhalfblack    }{\mathord}{circle, filled bottom half}%
+\UnicodeMathSymbol{"025D3}{\circletophalfblack       }{\mathord}{circle, filled top half}%
+\UnicodeMathSymbol{"025D4}{\circleurquadblack        }{\mathord}{circle with upper right quadrant black}%
+\UnicodeMathSymbol{"025D5}{\blackcircleulquadwhite   }{\mathord}{circle with all but upper left quadrant black}%
+\UnicodeMathSymbol{"025D6}{\blacklefthalfcircle      }{\mathord}{left half black circle}%
+\UnicodeMathSymbol{"025D7}{\blackrighthalfcircle     }{\mathord}{right half black circle}%
+\UnicodeMathSymbol{"025D8}{\inversebullet            }{\mathord}{inverse bullet }%
+\UnicodeMathSymbol{"025D9}{\inversewhitecircle       }{\mathord}{inverse white circle}%
+\UnicodeMathSymbol{"025DA}{\invwhiteupperhalfcircle  }{\mathord}{upper half inverse white circle}%
+\UnicodeMathSymbol{"025DB}{\invwhitelowerhalfcircle  }{\mathord}{lower half inverse white circle}%
+\UnicodeMathSymbol{"025DC}{\ularc                    }{\mathord}{upper left quadrant circular arc}%
+\UnicodeMathSymbol{"025DD}{\urarc                    }{\mathord}{upper right quadrant circular arc}%
+\UnicodeMathSymbol{"025DE}{\lrarc                    }{\mathord}{lower right quadrant circular arc}%
+\UnicodeMathSymbol{"025DF}{\llarc                    }{\mathord}{lower left quadrant circular arc}%
+\UnicodeMathSymbol{"025E0}{\topsemicircle            }{\mathord}{upper half circle}%
+\UnicodeMathSymbol{"025E1}{\botsemicircle            }{\mathord}{lower half circle}%
+\UnicodeMathSymbol{"025E2}{\lrblacktriangle          }{\mathord}{lower right triangle, filled}%
+\UnicodeMathSymbol{"025E3}{\llblacktriangle          }{\mathord}{lower left triangle, filled}%
+\UnicodeMathSymbol{"025E4}{\ulblacktriangle          }{\mathord}{upper left triangle, filled}%
+\UnicodeMathSymbol{"025E5}{\urblacktriangle          }{\mathord}{upper right triangle, filled}%
+\UnicodeMathSymbol{"025E6}{\smwhtcircle              }{\mathord}{white bullet}%
+\UnicodeMathSymbol{"025E7}{\squareleftblack          }{\mathord}{square, filled left half}%
+\UnicodeMathSymbol{"025E8}{\squarerightblack         }{\mathord}{square, filled right half}%
+\UnicodeMathSymbol{"025E9}{\squareulblack            }{\mathord}{square, filled top left corner}%
+\UnicodeMathSymbol{"025EA}{\squarelrblack            }{\mathord}{square, filled bottom right corner}%
+\UnicodeMathSymbol{"025EB}{\boxbar                   }{\mathbin}{vertical bar in box}%
+\UnicodeMathSymbol{"025EC}{\trianglecdot             }{\mathord}{triangle with centered dot}%
+\UnicodeMathSymbol{"025ED}{\triangleleftblack        }{\mathord}{up-pointing triangle with left half black}%
+\UnicodeMathSymbol{"025EE}{\trianglerightblack       }{\mathord}{up-pointing triangle with right half black}%
+\UnicodeMathSymbol{"025EF}{\lgwhtcircle              }{\mathord}{large circle}%
+\UnicodeMathSymbol{"025F0}{\squareulquad             }{\mathord}{white square with upper left quadrant}%
+\UnicodeMathSymbol{"025F1}{\squarellquad             }{\mathord}{white square with lower left quadrant}%
+\UnicodeMathSymbol{"025F2}{\squarelrquad             }{\mathord}{white square with lower right quadrant}%
+\UnicodeMathSymbol{"025F3}{\squareurquad             }{\mathord}{white square with upper right quadrant}%
+\UnicodeMathSymbol{"025F4}{\circleulquad             }{\mathord}{white circle with upper left quadrant}%
+\UnicodeMathSymbol{"025F5}{\circlellquad             }{\mathord}{white circle with lower left quadrant}%
+\UnicodeMathSymbol{"025F6}{\circlelrquad             }{\mathord}{white circle with lower right quadrant}%
+\UnicodeMathSymbol{"025F7}{\circleurquad             }{\mathord}{white circle with upper right quadrant}%
+\UnicodeMathSymbol{"025F8}{\ultriangle               }{\mathord}{upper left triangle}%
+\UnicodeMathSymbol{"025F9}{\urtriangle               }{\mathord}{upper right triangle}%
+\UnicodeMathSymbol{"025FA}{\lltriangle               }{\mathord}{lower left triangle}%
+\UnicodeMathSymbol{"025FB}{\mdwhtsquare              }{\mathord}{white medium square}%
+\UnicodeMathSymbol{"025FC}{\mdblksquare              }{\mathord}{black medium square}%
+\UnicodeMathSymbol{"025FD}{\mdsmwhtsquare            }{\mathord}{white medium small square}%
+\UnicodeMathSymbol{"025FE}{\mdsmblksquare            }{\mathord}{black medium small square}%
+\UnicodeMathSymbol{"025FF}{\lrtriangle               }{\mathord}{lower right triangle}%
+\UnicodeMathSymbol{"02605}{\bigstar                  }{\mathord}{star, filled}%
+\UnicodeMathSymbol{"02606}{\bigwhitestar             }{\mathord}{star, open}%
+\UnicodeMathSymbol{"02609}{\astrosun                 }{\mathord}{sun}%
+\UnicodeMathSymbol{"02621}{\danger                   }{\mathord}{dangerous bend (caution sign)}%
+\UnicodeMathSymbol{"0263B}{\blacksmiley              }{\mathord}{black smiling face}%
+\UnicodeMathSymbol{"0263C}{\sun                      }{\mathord}{white sun with rays}%
+\UnicodeMathSymbol{"0263D}{\rightmoon                }{\mathord}{first quarter moon}%
+\UnicodeMathSymbol{"0263E}{\leftmoon                 }{\mathord}{last quarter moon}%
+\UnicodeMathSymbol{"02640}{\female                   }{\mathord}{venus, female}%
+\UnicodeMathSymbol{"02642}{\male                     }{\mathord}{mars, male}%
+\UnicodeMathSymbol{"02660}{\spadesuit                }{\mathord}{spades suit symbol}%
+\UnicodeMathSymbol{"02661}{\heartsuit                }{\mathord}{heart suit symbol}%
+\UnicodeMathSymbol{"02662}{\diamondsuit              }{\mathord}{diamond suit symbol}%
+\UnicodeMathSymbol{"02663}{\clubsuit                 }{\mathord}{club suit symbol}%
+\UnicodeMathSymbol{"02664}{\varspadesuit             }{\mathord}{spade, white (card suit)}%
+\UnicodeMathSymbol{"02665}{\varheartsuit             }{\mathord}{filled heart (card suit)}%
+\UnicodeMathSymbol{"02666}{\vardiamondsuit           }{\mathord}{filled diamond (card suit)}%
+\UnicodeMathSymbol{"02667}{\varclubsuit              }{\mathord}{club, white (card suit)}%
+\UnicodeMathSymbol{"02669}{\quarternote              }{\mathord}{music note (sung text sign)}%
+\UnicodeMathSymbol{"0266A}{\eighthnote               }{\mathord}{eighth note}%
+\UnicodeMathSymbol{"0266B}{\twonotes                 }{\mathord}{beamed eighth notes}%
+\UnicodeMathSymbol{"0266D}{\flat                     }{\mathord}{musical flat}%
+\UnicodeMathSymbol{"0266E}{\natural                  }{\mathord}{music natural}%
+\UnicodeMathSymbol{"0266F}{\sharp                    }{\mathord}{musical sharp}%
+\UnicodeMathSymbol{"0267E}{\acidfree                 }{\mathord}{permanent paper sign}%
+\UnicodeMathSymbol{"02680}{\dicei                    }{\mathord}{die face-1}%
+\UnicodeMathSymbol{"02681}{\diceii                   }{\mathord}{die face-2}%
+\UnicodeMathSymbol{"02682}{\diceiii                  }{\mathord}{die face-3}%
+\UnicodeMathSymbol{"02683}{\diceiv                   }{\mathord}{die face-4}%
+\UnicodeMathSymbol{"02684}{\dicev                    }{\mathord}{die face-5}%
+\UnicodeMathSymbol{"02685}{\dicevi                   }{\mathord}{die face-6}%
+\UnicodeMathSymbol{"02686}{\circledrightdot          }{\mathord}{white circle with dot right}%
+\UnicodeMathSymbol{"02687}{\circledtwodots           }{\mathord}{white circle with two dots}%
+\UnicodeMathSymbol{"02688}{\blackcircledrightdot     }{\mathord}{black circle with white dot right}%
+\UnicodeMathSymbol{"02689}{\blackcircledtwodots      }{\mathord}{black circle with two white dots}%
+\UnicodeMathSymbol{"026A5}{\Hermaphrodite            }{\mathord}{male and female sign}%
+\UnicodeMathSymbol{"026AA}{\mdwhtcircle              }{\mathord}{medium white circle}%
+\UnicodeMathSymbol{"026AB}{\mdblkcircle              }{\mathord}{medium black circle}%
+\UnicodeMathSymbol{"026AC}{\mdsmwhtcircle            }{\mathord}{medium small white circle}%
+\UnicodeMathSymbol{"026B2}{\neuter                   }{\mathord}{neuter}%
+\UnicodeMathSymbol{"02713}{\checkmark                }{\mathord}{tick, check mark}%
+\UnicodeMathSymbol{"02720}{\maltese                  }{\mathord}{maltese cross}%
+\UnicodeMathSymbol{"0272A}{\circledstar              }{\mathord}{circled white star}%
+\UnicodeMathSymbol{"02736}{\varstar                  }{\mathord}{six pointed black star}%
+\UnicodeMathSymbol{"0273D}{\dingasterisk             }{\mathord}{heavy teardrop-spoked asterisk}%
+\UnicodeMathSymbol{"02772}{\lbrbrak                  }{\mathopen}{light left tortoise shell bracket ornament}%
+\UnicodeMathSymbol{"02773}{\rbrbrak                  }{\mathclose}{light right tortoise shell bracket ornament}%
+\UnicodeMathSymbol{"0279B}{\draftingarrow            }{\mathord}{right arrow with bold head (drafting)}%
+\UnicodeMathSymbol{"027C0}{\threedangle              }{\mathord}{three dimensional angle}%
+\UnicodeMathSymbol{"027C1}{\whiteinwhitetriangle     }{\mathord}{white triangle containing small white triangle}%
+\UnicodeMathSymbol{"027C2}{\perp                     }{\mathrel}{perpendicular}%
+\UnicodeMathSymbol{"027C3}{\subsetcirc               }{\mathord}{open subset}%
+\UnicodeMathSymbol{"027C4}{\supsetcirc               }{\mathord}{open superset}%
+\UnicodeMathSymbol{"027C5}{\lbag                     }{\mathopen}{left s-shaped bag delimiter}%
+\UnicodeMathSymbol{"027C6}{\rbag                     }{\mathclose}{right s-shaped bag delimiter}%
+\UnicodeMathSymbol{"027C7}{\veedot                   }{\mathbin}{or with dot inside}%
+\UnicodeMathSymbol{"027C8}{\bsolhsub                 }{\mathrel}{reverse solidus preceding subset}%
+\UnicodeMathSymbol{"027C9}{\suphsol                  }{\mathrel}{superset preceding solidus}%
+\UnicodeMathSymbol{"027CC}{\longdivision             }{\mathopen}{long division}%
+\UnicodeMathSymbol{"027D0}{\diamondcdot              }{\mathord}{white diamond with centred dot}%
+\UnicodeMathSymbol{"027D1}{\wedgedot                 }{\mathbin}{and with dot}%
+\UnicodeMathSymbol{"027D2}{\upin                     }{\mathrel}{element of opening upwards}%
+\UnicodeMathSymbol{"027D3}{\pullback                 }{\mathrel}{lower right corner with dot}%
+\UnicodeMathSymbol{"027D4}{\pushout                  }{\mathrel}{upper left corner with dot}%
+\UnicodeMathSymbol{"027D5}{\leftouterjoin            }{\mathop}{left outer join}%
+\UnicodeMathSymbol{"027D6}{\rightouterjoin           }{\mathop}{right outer join}%
+\UnicodeMathSymbol{"027D7}{\fullouterjoin            }{\mathop}{full outer join}%
+\UnicodeMathSymbol{"027D8}{\bigbot                   }{\mathop}{large up tack}%
+\UnicodeMathSymbol{"027D9}{\bigtop                   }{\mathop}{large down tack}%
+\UnicodeMathSymbol{"027DA}{\DashVDash                }{\mathrel}{left and right double turnstile}%
+\UnicodeMathSymbol{"027DB}{\dashVdash                }{\mathrel}{left and right tack}%
+\UnicodeMathSymbol{"027DC}{\multimapinv              }{\mathrel}{left multimap}%
+\UnicodeMathSymbol{"027DD}{\vlongdash                }{\mathrel}{long left tack}%
+\UnicodeMathSymbol{"027DE}{\longdashv                }{\mathrel}{long right tack}%
+\UnicodeMathSymbol{"027DF}{\cirbot                   }{\mathrel}{up tack with circle above}%
+\UnicodeMathSymbol{"027E0}{\lozengeminus             }{\mathbin}{lozenge divided by horizontal rule}%
+\UnicodeMathSymbol{"027E1}{\concavediamond           }{\mathbin}{white concave-sided diamond}%
+\UnicodeMathSymbol{"027E2}{\concavediamondtickleft   }{\mathbin}{white concave-sided diamond with leftwards tick}%
+\UnicodeMathSymbol{"027E3}{\concavediamondtickright  }{\mathbin}{white concave-sided diamond with rightwards tick}%
+\UnicodeMathSymbol{"027E4}{\whitesquaretickleft      }{\mathbin}{white square with leftwards tick}%
+\UnicodeMathSymbol{"027E5}{\whitesquaretickright     }{\mathbin}{white square with rightwards tick}%
+\UnicodeMathSymbol{"027E6}{\lBrack                   }{\mathopen}{mathematical left white square bracket}%
+\UnicodeMathSymbol{"027E7}{\rBrack                   }{\mathclose}{mathematical right white square bracket}%
+\UnicodeMathSymbol{"027E8}{\langle                   }{\mathopen}{mathematical left angle bracket}%
+\UnicodeMathSymbol{"027E9}{\rangle                   }{\mathclose}{mathematical right angle bracket}%
+\UnicodeMathSymbol{"027EA}{\lAngle                   }{\mathopen}{mathematical left double angle bracket}%
+\UnicodeMathSymbol{"027EB}{\rAngle                   }{\mathclose}{mathematical right double angle bracket}%
+\UnicodeMathSymbol{"027EC}{\Lbrbrak                  }{\mathopen}{mathematical left white tortoise shell bracket}%
+\UnicodeMathSymbol{"027ED}{\Rbrbrak                  }{\mathclose}{mathematical right white tortoise shell bracket}%
+\UnicodeMathSymbol{"027EE}{\lgroup                   }{\mathopen}{mathematical left flattened parenthesis}%
+\UnicodeMathSymbol{"027EF}{\rgroup                   }{\mathclose}{mathematical right flattened parenthesis}%
+\UnicodeMathSymbol{"027F0}{\UUparrow                 }{\mathrel}{upwards quadruple arrow}%
+\UnicodeMathSymbol{"027F1}{\DDownarrow               }{\mathrel}{downwards quadruple arrow}%
+\UnicodeMathSymbol{"027F2}{\acwgapcirclearrow        }{\mathrel}{anticlockwise gapped circle arrow}%
+\UnicodeMathSymbol{"027F3}{\cwgapcirclearrow         }{\mathrel}{clockwise gapped circle arrow}%
+\UnicodeMathSymbol{"027F4}{\rightarrowonoplus        }{\mathrel}{right arrow with circled plus}%
+\UnicodeMathSymbol{"027F5}{\longleftarrow            }{\mathrel}{long leftwards arrow}%
+\UnicodeMathSymbol{"027F6}{\longrightarrow           }{\mathrel}{long rightwards arrow}%
+\UnicodeMathSymbol{"027F7}{\longleftrightarrow       }{\mathrel}{long left right arrow}%
+\UnicodeMathSymbol{"027F8}{\Longleftarrow            }{\mathrel}{long leftwards double arrow}%
+\UnicodeMathSymbol{"027F9}{\Longrightarrow           }{\mathrel}{long rightwards double arrow}%
+\UnicodeMathSymbol{"027FA}{\Longleftrightarrow       }{\mathrel}{long left right double arrow}%
+\UnicodeMathSymbol{"027FB}{\longmapsfrom             }{\mathrel}{long leftwards arrow from bar}%
+\UnicodeMathSymbol{"027FC}{\longmapsto               }{\mathrel}{long rightwards arrow from bar}%
+\UnicodeMathSymbol{"027FD}{\Longmapsfrom             }{\mathrel}{long leftwards double arrow from bar}%
+\UnicodeMathSymbol{"027FE}{\Longmapsto               }{\mathrel}{long rightwards double arrow from bar}%
+\UnicodeMathSymbol{"027FF}{\longrightsquigarrow      }{\mathrel}{long rightwards squiggle arrow}%
+\UnicodeMathSymbol{"02900}{\nvtwoheadrightarrow      }{\mathrel}{rightwards two-headed arrow with vertical stroke}%
+\UnicodeMathSymbol{"02901}{\nVtwoheadrightarrow      }{\mathrel}{rightwards two-headed arrow with double vertical stroke}%
+\UnicodeMathSymbol{"02902}{\nvLeftarrow              }{\mathrel}{leftwards double arrow with vertical stroke}%
+\UnicodeMathSymbol{"02903}{\nvRightarrow             }{\mathrel}{rightwards double arrow with vertical stroke}%
+\UnicodeMathSymbol{"02904}{\nvLeftrightarrow         }{\mathrel}{left right double arrow with vertical stroke}%
+\UnicodeMathSymbol{"02905}{\twoheadmapsto            }{\mathrel}{rightwards two-headed arrow from bar}%
+\UnicodeMathSymbol{"02906}{\Mapsfrom                 }{\mathrel}{leftwards double arrow from bar}%
+\UnicodeMathSymbol{"02907}{\Mapsto                   }{\mathrel}{rightwards double arrow from bar}%
+\UnicodeMathSymbol{"02908}{\downarrowbarred          }{\mathrel}{downwards arrow with horizontal stroke}%
+\UnicodeMathSymbol{"02909}{\uparrowbarred            }{\mathrel}{upwards arrow with horizontal stroke}%
+\UnicodeMathSymbol{"0290A}{\Uuparrow                 }{\mathrel}{upwards triple arrow}%
+\UnicodeMathSymbol{"0290B}{\Ddownarrow               }{\mathrel}{downwards triple arrow}%
+\UnicodeMathSymbol{"0290C}{\leftbkarrow              }{\mathrel}{leftwards double dash arrow}%
+\UnicodeMathSymbol{"0290D}{\rightbkarrow             }{\mathrel}{rightwards double dash arrow}%
+\UnicodeMathSymbol{"0290E}{\leftdbkarrow             }{\mathrel}{leftwards triple dash arrow}%
+\UnicodeMathSymbol{"0290F}{\dbkarrow                  }{\mathrel}{rightwards triple dash arrow}%
+\UnicodeMathSymbol{"02910}{\drbkarrow                 }{\mathrel}{rightwards two-headed triple dash arrow}%
+\UnicodeMathSymbol{"02911}{\rightdotarrow            }{\mathrel}{rightwards arrow with dotted stem}%
+\UnicodeMathSymbol{"02912}{\baruparrow               }{\mathrel}{upwards arrow to bar}%
+\UnicodeMathSymbol{"02913}{\downarrowbar             }{\mathrel}{downwards arrow to bar}%
+\UnicodeMathSymbol{"02914}{\nvrightarrowtail         }{\mathrel}{rightwards arrow with tail with vertical stroke}%
+\UnicodeMathSymbol{"02915}{\nVrightarrowtail         }{\mathrel}{rightwards arrow with tail with double vertical stroke}%
+\UnicodeMathSymbol{"02916}{\twoheadrightarrowtail    }{\mathrel}{rightwards two-headed arrow with tail}%
+\UnicodeMathSymbol{"02917}{\nvtwoheadrightarrowtail  }{\mathrel}{rightwards two-headed arrow with tail with vertical stroke}%
+\UnicodeMathSymbol{"02918}{\nVtwoheadrightarrowtail  }{\mathrel}{rightwards two-headed arrow with tail with double vertical stroke}%
+\UnicodeMathSymbol{"02919}{\lefttail                 }{\mathrel}{leftwards arrow-tail}%
+\UnicodeMathSymbol{"0291A}{\righttail                }{\mathrel}{rightwards arrow-tail}%
+\UnicodeMathSymbol{"0291B}{\leftdbltail              }{\mathrel}{leftwards double arrow-tail}%
+\UnicodeMathSymbol{"0291C}{\rightdbltail             }{\mathrel}{rightwards double arrow-tail}%
+\UnicodeMathSymbol{"0291D}{\diamondleftarrow         }{\mathrel}{leftwards arrow to black diamond}%
+\UnicodeMathSymbol{"0291E}{\rightarrowdiamond        }{\mathrel}{rightwards arrow to black diamond}%
+\UnicodeMathSymbol{"0291F}{\diamondleftarrowbar      }{\mathrel}{leftwards arrow from bar to black diamond}%
+\UnicodeMathSymbol{"02920}{\barrightarrowdiamond     }{\mathrel}{rightwards arrow from bar to black diamond}%
+\UnicodeMathSymbol{"02921}{\nwsearrow                }{\mathrel}{north west and south east arrow}%
+\UnicodeMathSymbol{"02922}{\neswarrow                }{\mathrel}{north east and south west arrow}%
+\UnicodeMathSymbol{"02923}{\hknwarrow                }{\mathrel}{north west arrow with hook}%
+\UnicodeMathSymbol{"02924}{\hknearrow                }{\mathrel}{north east arrow with hook}%
+\UnicodeMathSymbol{"02925}{\hksearrow                 }{\mathrel}{south east arrow with hook}%
+\UnicodeMathSymbol{"02926}{\hkswarrow                 }{\mathrel}{south west arrow with hook}%
+\UnicodeMathSymbol{"02927}{\tona                     }{\mathrel}{north west arrow and north east arrow}%
+\UnicodeMathSymbol{"02928}{\toea                     }{\mathrel}{north east arrow and south east arrow}%
+\UnicodeMathSymbol{"02929}{\tosa                     }{\mathrel}{south east arrow and south west arrow}%
+\UnicodeMathSymbol{"0292A}{\towa                     }{\mathrel}{south west arrow and north west arrow}%
+\UnicodeMathSymbol{"0292B}{\rdiagovfdiag             }{\mathord}{rising diagonal crossing falling diagonal}%
+\UnicodeMathSymbol{"0292C}{\fdiagovrdiag             }{\mathord}{falling diagonal crossing rising diagonal}%
+\UnicodeMathSymbol{"0292D}{\seovnearrow              }{\mathord}{south east arrow crossing north east arrow}%
+\UnicodeMathSymbol{"0292E}{\neovsearrow              }{\mathord}{north east arrow crossing south east arrow}%
+\UnicodeMathSymbol{"0292F}{\fdiagovnearrow           }{\mathord}{falling diagonal crossing north east arrow}%
+\UnicodeMathSymbol{"02930}{\rdiagovsearrow           }{\mathord}{rising diagonal crossing south east arrow}%
+\UnicodeMathSymbol{"02931}{\neovnwarrow              }{\mathord}{north east arrow crossing north west arrow}%
+\UnicodeMathSymbol{"02932}{\nwovnearrow              }{\mathord}{north west arrow crossing north east arrow}%
+\UnicodeMathSymbol{"02933}{\rightcurvedarrow         }{\mathrel}{wave arrow pointing directly right}%
+\UnicodeMathSymbol{"02934}{\uprightcurvearrow        }{\mathord}{arrow pointing rightwards then curving upwards}%
+\UnicodeMathSymbol{"02935}{\downrightcurvedarrow     }{\mathord}{arrow pointing rightwards then curving downwards}%
+\UnicodeMathSymbol{"02936}{\leftdowncurvedarrow      }{\mathrel}{arrow pointing downwards then curving leftwards}%
+\UnicodeMathSymbol{"02937}{\rightdowncurvedarrow     }{\mathrel}{arrow pointing downwards then curving rightwards}%
+\UnicodeMathSymbol{"02938}{\cwrightarcarrow          }{\mathrel}{right-side arc clockwise arrow}%
+\UnicodeMathSymbol{"02939}{\acwleftarcarrow          }{\mathrel}{left-side arc anticlockwise arrow}%
+\UnicodeMathSymbol{"0293A}{\acwoverarcarrow          }{\mathrel}{top arc anticlockwise arrow}%
+\UnicodeMathSymbol{"0293B}{\acwunderarcarrow         }{\mathrel}{bottom arc anticlockwise arrow}%
+\UnicodeMathSymbol{"0293C}{\curvearrowrightminus     }{\mathrel}{top arc clockwise arrow with minus}%
+\UnicodeMathSymbol{"0293D}{\curvearrowleftplus       }{\mathrel}{top arc anticlockwise arrow with plus}%
+\UnicodeMathSymbol{"0293E}{\cwundercurvearrow        }{\mathrel}{lower right semicircular clockwise arrow}%
+\UnicodeMathSymbol{"0293F}{\ccwundercurvearrow       }{\mathrel}{lower left semicircular anticlockwise arrow}%
+\UnicodeMathSymbol{"02940}{\acwcirclearrow           }{\mathrel}{anticlockwise closed circle arrow}%
+\UnicodeMathSymbol{"02941}{\cwcirclearrow            }{\mathrel}{clockwise closed circle arrow}%
+\UnicodeMathSymbol{"02942}{\rightarrowshortleftarrow }{\mathrel}{rightwards arrow above short leftwards arrow}%
+\UnicodeMathSymbol{"02943}{\leftarrowshortrightarrow }{\mathrel}{leftwards arrow above short rightwards arrow}%
+\UnicodeMathSymbol{"02944}{\shortrightarrowleftarrow }{\mathrel}{short rightwards arrow above leftwards arrow}%
+\UnicodeMathSymbol{"02945}{\rightarrowplus           }{\mathrel}{rightwards arrow with plus below}%
+\UnicodeMathSymbol{"02946}{\leftarrowplus            }{\mathrel}{leftwards arrow with plus below}%
+\UnicodeMathSymbol{"02947}{\rightarrowx              }{\mathrel}{rightwards arrow through x}%
+\UnicodeMathSymbol{"02948}{\leftrightarrowcircle     }{\mathrel}{left right arrow through small circle}%
+\UnicodeMathSymbol{"02949}{\twoheaduparrowcircle     }{\mathrel}{upwards two-headed arrow from small circle}%
+\UnicodeMathSymbol{"0294A}{\leftrightharpoonupdown   }{\mathrel}{left barb up right barb down harpoon}%
+\UnicodeMathSymbol{"0294B}{\leftrightharpoondownup   }{\mathrel}{left barb down right barb up harpoon}%
+\UnicodeMathSymbol{"0294C}{\updownharpoonrightleft   }{\mathrel}{up barb right down barb left harpoon}%
+\UnicodeMathSymbol{"0294D}{\updownharpoonleftright   }{\mathrel}{up barb left down barb right harpoon}%
+\UnicodeMathSymbol{"0294E}{\leftrightharpoonupup     }{\mathrel}{left barb up right barb up harpoon}%
+\UnicodeMathSymbol{"0294F}{\updownharpoonrightright  }{\mathrel}{up barb right down barb right harpoon}%
+\UnicodeMathSymbol{"02950}{\leftrightharpoondowndown }{\mathrel}{left barb down right barb down harpoon}%
+\UnicodeMathSymbol{"02951}{\updownharpoonleftleft    }{\mathrel}{up barb left down barb left harpoon}%
+\UnicodeMathSymbol{"02952}{\barleftharpoonup         }{\mathrel}{leftwards harpoon with barb up to bar}%
+\UnicodeMathSymbol{"02953}{\rightharpoonupbar        }{\mathrel}{rightwards harpoon with barb up to bar}%
+\UnicodeMathSymbol{"02954}{\barupharpoonright        }{\mathrel}{upwards harpoon with barb right to bar}%
+\UnicodeMathSymbol{"02955}{\downharpoonrightbar      }{\mathrel}{downwards harpoon with barb right to bar}%
+\UnicodeMathSymbol{"02956}{\barleftharpoondown       }{\mathrel}{leftwards harpoon with barb down to bar}%
+\UnicodeMathSymbol{"02957}{\rightharpoondownbar      }{\mathrel}{rightwards harpoon with barb down to bar}%
+\UnicodeMathSymbol{"02958}{\barupharpoonleft         }{\mathrel}{upwards harpoon with barb left to bar}%
+\UnicodeMathSymbol{"02959}{\downharpoonleftbar       }{\mathrel}{downwards harpoon with barb left to bar}%
+\UnicodeMathSymbol{"0295A}{\leftharpoonupbar         }{\mathrel}{leftwards harpoon with barb up from bar}%
+\UnicodeMathSymbol{"0295B}{\barrightharpoonup        }{\mathrel}{rightwards harpoon with barb up from bar}%
+\UnicodeMathSymbol{"0295C}{\upharpoonrightbar        }{\mathrel}{upwards harpoon with barb right from bar}%
+\UnicodeMathSymbol{"0295D}{\bardownharpoonright      }{\mathrel}{downwards harpoon with barb right from bar}%
+\UnicodeMathSymbol{"0295E}{\leftharpoondownbar       }{\mathrel}{leftwards harpoon with barb down from bar}%
+\UnicodeMathSymbol{"0295F}{\barrightharpoondown      }{\mathrel}{rightwards harpoon with barb down from bar}%
+\UnicodeMathSymbol{"02960}{\upharpoonleftbar         }{\mathrel}{upwards harpoon with barb left from bar}%
+\UnicodeMathSymbol{"02961}{\bardownharpoonleft       }{\mathrel}{downwards harpoon with barb left from bar}%
+\UnicodeMathSymbol{"02962}{\leftharpoonsupdown       }{\mathrel}{leftwards harpoon with barb up above leftwards harpoon with barb down}%
+\UnicodeMathSymbol{"02963}{\upharpoonsleftright      }{\mathrel}{upwards harpoon with barb left beside upwards harpoon with barb right}%
+\UnicodeMathSymbol{"02964}{\rightharpoonsupdown      }{\mathrel}{rightwards harpoon with barb up above rightwards harpoon with barb down}%
+\UnicodeMathSymbol{"02965}{\downharpoonsleftright    }{\mathrel}{downwards harpoon with barb left beside downwards harpoon with barb right}%
+\UnicodeMathSymbol{"02966}{\leftrightharpoonsup      }{\mathrel}{leftwards harpoon with barb up above rightwards harpoon with barb up}%
+\UnicodeMathSymbol{"02967}{\leftrightharpoonsdown    }{\mathrel}{leftwards harpoon with barb down above rightwards harpoon with barb down}%
+\UnicodeMathSymbol{"02968}{\rightleftharpoonsup      }{\mathrel}{rightwards harpoon with barb up above leftwards harpoon with barb up}%
+\UnicodeMathSymbol{"02969}{\rightleftharpoonsdown    }{\mathrel}{rightwards harpoon with barb down above leftwards harpoon with barb down}%
+\UnicodeMathSymbol{"0296A}{\leftharpoonupdash        }{\mathrel}{leftwards harpoon with barb up above long dash}%
+\UnicodeMathSymbol{"0296B}{\dashleftharpoondown      }{\mathrel}{leftwards harpoon with barb down below long dash}%
+\UnicodeMathSymbol{"0296C}{\rightharpoonupdash       }{\mathrel}{rightwards harpoon with barb up above long dash}%
+\UnicodeMathSymbol{"0296D}{\dashrightharpoondown     }{\mathrel}{rightwards harpoon with barb down below long dash}%
+\UnicodeMathSymbol{"0296E}{\updownharpoonsleftright  }{\mathrel}{upwards harpoon with barb left beside downwards harpoon with barb right}%
+\UnicodeMathSymbol{"0296F}{\downupharpoonsleftright  }{\mathrel}{downwards harpoon with barb left beside upwards harpoon with barb right}%
+\UnicodeMathSymbol{"02970}{\rightimply               }{\mathrel}{right double arrow with rounded head}%
+\UnicodeMathSymbol{"02971}{\equalrightarrow          }{\mathrel}{equals sign above rightwards arrow}%
+\UnicodeMathSymbol{"02972}{\similarrightarrow        }{\mathrel}{tilde operator above rightwards arrow}%
+\UnicodeMathSymbol{"02973}{\leftarrowsimilar         }{\mathrel}{leftwards arrow above tilde operator}%
+\UnicodeMathSymbol{"02974}{\rightarrowsimilar        }{\mathrel}{rightwards arrow above tilde operator}%
+\UnicodeMathSymbol{"02975}{\rightarrowapprox         }{\mathrel}{rightwards arrow above almost equal to}%
+\UnicodeMathSymbol{"02976}{\ltlarr                   }{\mathrel}{less-than above leftwards arrow}%
+\UnicodeMathSymbol{"02977}{\leftarrowless            }{\mathrel}{leftwards arrow through less-than}%
+\UnicodeMathSymbol{"02978}{\gtrarr                   }{\mathrel}{greater-than above rightwards arrow}%
+\UnicodeMathSymbol{"02979}{\subrarr                  }{\mathrel}{subset above rightwards arrow}%
+\UnicodeMathSymbol{"0297A}{\leftarrowsubset          }{\mathrel}{leftwards arrow through subset}%
+\UnicodeMathSymbol{"0297B}{\suplarr                  }{\mathrel}{superset above leftwards arrow}%
+\UnicodeMathSymbol{"0297C}{\leftfishtail             }{\mathrel}{left fish tail}%
+\UnicodeMathSymbol{"0297D}{\rightfishtail            }{\mathrel}{right fish tail}%
+\UnicodeMathSymbol{"0297E}{\upfishtail               }{\mathrel}{up fish tail}%
+\UnicodeMathSymbol{"0297F}{\downfishtail             }{\mathrel}{down fish tail}%
+\UnicodeMathSymbol{"02980}{\Vvert                    }{\mathfence}{triple vertical bar delimiter}%
+\UnicodeMathSymbol{"02981}{\mdsmblkcircle            }{\mathord}{z notation spot}%
+\UnicodeMathSymbol{"02982}{\typecolon                }{\mathrel}{z notation type colon}%
+\UnicodeMathSymbol{"02983}{\lBrace                   }{\mathopen}{left white curly bracket}%
+\UnicodeMathSymbol{"02984}{\rBrace                   }{\mathclose}{right white curly bracket}%
+\UnicodeMathSymbol{"02985}{\lParen                   }{\mathopen}{left white parenthesis}%
+\UnicodeMathSymbol{"02986}{\rParen                   }{\mathclose}{right white parenthesis}%
+\UnicodeMathSymbol{"02987}{\llparenthesis            }{\mathopen}{z notation left image bracket}%
+\UnicodeMathSymbol{"02988}{\rrparenthesis            }{\mathclose}{z notation right image bracket}%
+\UnicodeMathSymbol{"02989}{\llangle                  }{\mathopen}{z notation left binding bracket}%
+\UnicodeMathSymbol{"0298A}{\rrangle                  }{\mathclose}{z notation right binding bracket}%
+\UnicodeMathSymbol{"0298B}{\lbrackubar               }{\mathopen}{left square bracket with underbar}%
+\UnicodeMathSymbol{"0298C}{\rbrackubar               }{\mathclose}{right square bracket with underbar}%
+\UnicodeMathSymbol{"0298D}{\lbrackultick             }{\mathopen}{left square bracket with tick in top corner}%
+\UnicodeMathSymbol{"0298E}{\rbracklrtick             }{\mathclose}{right square bracket with tick in bottom corner}%
+\UnicodeMathSymbol{"0298F}{\lbracklltick             }{\mathopen}{left square bracket with tick in bottom corner}%
+\UnicodeMathSymbol{"02990}{\rbrackurtick             }{\mathclose}{right square bracket with tick in top corner}%
+\UnicodeMathSymbol{"02991}{\langledot                }{\mathopen}{left angle bracket with dot}%
+\UnicodeMathSymbol{"02992}{\rangledot                }{\mathclose}{right angle bracket with dot}%
+\UnicodeMathSymbol{"02993}{\lparenless               }{\mathopen}{left arc less-than bracket}%
+\UnicodeMathSymbol{"02994}{\rparengtr                }{\mathclose}{right arc greater-than bracket}%
+\UnicodeMathSymbol{"02995}{\Lparengtr                }{\mathopen}{double left arc greater-than bracket}%
+\UnicodeMathSymbol{"02996}{\Rparenless               }{\mathclose}{double right arc less-than bracket}%
+\UnicodeMathSymbol{"02997}{\lblkbrbrak               }{\mathopen}{left black tortoise shell bracket}%
+\UnicodeMathSymbol{"02998}{\rblkbrbrak               }{\mathclose}{right black tortoise shell bracket}%
+\UnicodeMathSymbol{"02999}{\fourvdots                }{\mathord}{dotted fence}%
+\UnicodeMathSymbol{"0299A}{\vzigzag                  }{\mathord}{vertical zigzag line}%
+\UnicodeMathSymbol{"0299B}{\measuredangleleft        }{\mathord}{measured angle opening left}%
+\UnicodeMathSymbol{"0299C}{\rightanglesqr            }{\mathord}{right angle variant with square}%
+\UnicodeMathSymbol{"0299D}{\rightanglemdot           }{\mathord}{measured right angle with dot}%
+\UnicodeMathSymbol{"0299E}{\angles                   }{\mathord}{angle with s inside}%
+\UnicodeMathSymbol{"0299F}{\angdnr                   }{\mathord}{acute angle}%
+\UnicodeMathSymbol{"029A0}{\gtlpar                   }{\mathord}{spherical angle opening left}%
+\UnicodeMathSymbol{"029A1}{\sphericalangleup         }{\mathord}{spherical angle opening up}%
+\UnicodeMathSymbol{"029A2}{\turnangle                }{\mathord}{turned angle}%
+\UnicodeMathSymbol{"029A3}{\revangle                 }{\mathord}{reversed angle}%
+\UnicodeMathSymbol{"029A4}{\angleubar                }{\mathord}{angle with underbar}%
+\UnicodeMathSymbol{"029A5}{\revangleubar             }{\mathord}{reversed angle with underbar}%
+\UnicodeMathSymbol{"029A6}{\wideangledown            }{\mathord}{oblique angle opening up}%
+\UnicodeMathSymbol{"029A7}{\wideangleup              }{\mathord}{oblique angle opening down}%
+\UnicodeMathSymbol{"029A8}{\measanglerutone          }{\mathord}{measured angle with open arm ending in arrow pointing up and right}%
+\UnicodeMathSymbol{"029A9}{\measanglelutonw          }{\mathord}{measured angle with open arm ending in arrow pointing up and left}%
+\UnicodeMathSymbol{"029AA}{\measanglerdtose          }{\mathord}{measured angle with open arm ending in arrow pointing down and right}%
+\UnicodeMathSymbol{"029AB}{\measangleldtosw          }{\mathord}{measured angle with open arm ending in arrow pointing down and left}%
+\UnicodeMathSymbol{"029AC}{\measangleurtone          }{\mathord}{measured angle with open arm ending in arrow pointing right and up}%
+\UnicodeMathSymbol{"029AD}{\measangleultonw          }{\mathord}{measured angle with open arm ending in arrow pointing left and up}%
+\UnicodeMathSymbol{"029AE}{\measangledrtose          }{\mathord}{measured angle with open arm ending in arrow pointing right and down}%
+\UnicodeMathSymbol{"029AF}{\measangledltosw          }{\mathord}{measured angle with open arm ending in arrow pointing left and down}%
+\UnicodeMathSymbol{"029B0}{\revemptyset              }{\mathord}{reversed empty set}%
+\UnicodeMathSymbol{"029B1}{\emptysetobar             }{\mathord}{empty set with overbar}%
+\UnicodeMathSymbol{"029B2}{\emptysetocirc            }{\mathord}{empty set with small circle above}%
+\UnicodeMathSymbol{"029B3}{\emptysetoarr             }{\mathord}{empty set with right arrow above}%
+\UnicodeMathSymbol{"029B4}{\emptysetoarrl            }{\mathord}{empty set with left arrow above}%
+\UnicodeMathSymbol{"029B5}{\circlehbar               }{\mathbin}{circle with horizontal bar}%
+\UnicodeMathSymbol{"029B6}{\circledvert              }{\mathbin}{circled vertical bar}%
+\UnicodeMathSymbol{"029B7}{\circledparallel          }{\mathbin}{circled parallel}%
+\UnicodeMathSymbol{"029B8}{\obslash                  }{\mathbin}{circled reverse solidus}%
+\UnicodeMathSymbol{"029B9}{\operp                    }{\mathbin}{circled perpendicular}%
+\UnicodeMathSymbol{"029BA}{\obot                     }{\mathord}{circle divided by horizontal bar and top half divided by vertical bar}%
+\UnicodeMathSymbol{"029BB}{\olcross                  }{\mathord}{circle with superimposed x}%
+\UnicodeMathSymbol{"029BC}{\odotslashdot             }{\mathord}{circled anticlockwise-rotated division sign}%
+\UnicodeMathSymbol{"029BD}{\uparrowoncircle          }{\mathord}{up arrow through circle}%
+\UnicodeMathSymbol{"029BE}{\circledwhitebullet       }{\mathord}{circled white bullet}%
+\UnicodeMathSymbol{"029BF}{\circledbullet            }{\mathord}{circled bullet}%
+\UnicodeMathSymbol{"029C0}{\olessthan                }{\mathbin}{circled less-than}%
+\UnicodeMathSymbol{"029C1}{\ogreaterthan             }{\mathbin}{circled greater-than}%
+\UnicodeMathSymbol{"029C2}{\cirscir                  }{\mathord}{circle with small circle to the right}%
+\UnicodeMathSymbol{"029C3}{\cirE                     }{\mathord}{circle with two horizontal strokes to the right}%
+\UnicodeMathSymbol{"029C4}{\boxdiag                  }{\mathbin}{squared rising diagonal slash}%
+\UnicodeMathSymbol{"029C5}{\boxbslash                }{\mathbin}{squared falling diagonal slash}%
+\UnicodeMathSymbol{"029C6}{\boxast                   }{\mathbin}{squared asterisk}%
+\UnicodeMathSymbol{"029C7}{\boxcircle                }{\mathbin}{squared small circle}%
+\UnicodeMathSymbol{"029C8}{\boxbox                   }{\mathbin}{squared square}%
+\UnicodeMathSymbol{"029C9}{\boxonbox                 }{\mathord}{two joined squares}%
+\UnicodeMathSymbol{"029CA}{\triangleodot             }{\mathord}{triangle with dot above}%
+\UnicodeMathSymbol{"029CB}{\triangleubar             }{\mathord}{triangle with underbar}%
+\UnicodeMathSymbol{"029CC}{\triangles                }{\mathord}{s in triangle}%
+\UnicodeMathSymbol{"029CD}{\triangleserifs           }{\mathbin}{triangle with serifs at bottom}%
+\UnicodeMathSymbol{"029CE}{\rtriltri                 }{\mathrel}{right triangle above left triangle}%
+\UnicodeMathSymbol{"029CF}{\ltrivb                   }{\mathrel}{left triangle beside vertical bar}%
+\UnicodeMathSymbol{"029D0}{\vbrtri                   }{\mathrel}{vertical bar beside right triangle}%
+\UnicodeMathSymbol{"029D1}{\lfbowtie                 }{\mathrel}{left black bowtie}%
+\UnicodeMathSymbol{"029D2}{\rfbowtie                 }{\mathrel}{right black bowtie}%
+\UnicodeMathSymbol{"029D3}{\fbowtie                  }{\mathrel}{black bowtie}%
+\UnicodeMathSymbol{"029D4}{\lftimes                  }{\mathrel}{left black times}%
+\UnicodeMathSymbol{"029D5}{\rftimes                  }{\mathrel}{right black times}%
+\UnicodeMathSymbol{"029D6}{\hourglass                }{\mathbin}{white hourglass}%
+\UnicodeMathSymbol{"029D7}{\blackhourglass           }{\mathbin}{black hourglass}%
+\UnicodeMathSymbol{"029D8}{\lvzigzag                 }{\mathopen}{left wiggly fence}%
+\UnicodeMathSymbol{"029D9}{\rvzigzag                 }{\mathclose}{right wiggly fence}%
+\UnicodeMathSymbol{"029DA}{\Lvzigzag                 }{\mathopen}{left double wiggly fence}%
+\UnicodeMathSymbol{"029DB}{\Rvzigzag                 }{\mathclose}{right double wiggly fence}%
+\UnicodeMathSymbol{"029DC}{\iinfin                   }{\mathord}{incomplete infinity}%
+\UnicodeMathSymbol{"029DD}{\tieinfty                 }{\mathord}{tie over infinity}%
+\UnicodeMathSymbol{"029DE}{\nvinfty                  }{\mathord}{infinity negated with vertical bar}%
+\UnicodeMathSymbol{"029DF}{\dualmap                  }{\mathrel}{double-ended multimap}%
+\UnicodeMathSymbol{"029E0}{\laplac                   }{\mathord}{square with contoured outline}%
+\UnicodeMathSymbol{"029E1}{\lrtriangleeq             }{\mathrel}{increases as}%
+\UnicodeMathSymbol{"029E2}{\shuffle                  }{\mathbin}{shuffle product}%
+\UnicodeMathSymbol{"029E3}{\eparsl                   }{\mathrel}{equals sign and slanted parallel}%
+\UnicodeMathSymbol{"029E4}{\smeparsl                 }{\mathrel}{equals sign and slanted parallel with tilde above}%
+\UnicodeMathSymbol{"029E5}{\eqvparsl                 }{\mathrel}{identical to and slanted parallel}%
+\UnicodeMathSymbol{"029E6}{\gleichstark              }{\mathrel}{gleich stark}%
+\UnicodeMathSymbol{"029E7}{\thermod                  }{\mathord}{thermodynamic}%
+\UnicodeMathSymbol{"029E8}{\downtriangleleftblack    }{\mathord}{down-pointing triangle with left half black}%
+\UnicodeMathSymbol{"029E9}{\downtrianglerightblack   }{\mathord}{down-pointing triangle with right half black}%
+\UnicodeMathSymbol{"029EA}{\blackdiamonddownarrow    }{\mathord}{black diamond with down arrow}%
+\UnicodeMathSymbol{"029EB}{\mdlgblklozenge           }{\mathbin}{black lozenge}%
+\UnicodeMathSymbol{"029EC}{\circledownarrow          }{\mathord}{white circle with down arrow}%
+\UnicodeMathSymbol{"029ED}{\blackcircledownarrow     }{\mathord}{black circle with down arrow}%
+\UnicodeMathSymbol{"029EE}{\errbarsquare             }{\mathord}{error-barred white square}%
+\UnicodeMathSymbol{"029EF}{\errbarblacksquare        }{\mathord}{error-barred black square}%
+\UnicodeMathSymbol{"029F0}{\errbardiamond            }{\mathord}{error-barred white diamond}%
+\UnicodeMathSymbol{"029F1}{\errbarblackdiamond       }{\mathord}{error-barred black diamond}%
+\UnicodeMathSymbol{"029F2}{\errbarcircle             }{\mathord}{error-barred white circle}%
+\UnicodeMathSymbol{"029F3}{\errbarblackcircle        }{\mathord}{error-barred black circle}%
+\UnicodeMathSymbol{"029F4}{\ruledelayed              }{\mathrel}{rule-delayed}%
+\UnicodeMathSymbol{"029F5}{\setminus                 }{\mathbin}{reverse solidus operator}%
+\UnicodeMathSymbol{"029F6}{\dsol                     }{\mathbin}{solidus with overbar}%
+\UnicodeMathSymbol{"029F7}{\rsolbar                  }{\mathbin}{reverse solidus with horizontal stroke}%
+\UnicodeMathSymbol{"029F8}{\xsol                     }{\mathop}{big solidus}%
+\UnicodeMathSymbol{"029F9}{\xbsol                    }{\mathop}{big reverse solidus}%
+\UnicodeMathSymbol{"029FA}{\doubleplus               }{\mathbin}{double plus}%
+\UnicodeMathSymbol{"029FB}{\tripleplus               }{\mathbin}{triple plus}%
+\UnicodeMathSymbol{"029FC}{\lcurvyangle              }{\mathopen}{left pointing curved angle bracket}%
+\UnicodeMathSymbol{"029FD}{\rcurvyangle              }{\mathclose}{right pointing curved angle bracket}%
+\UnicodeMathSymbol{"029FE}{\tplus                    }{\mathbin}{tiny}%
+\UnicodeMathSymbol{"029FF}{\tminus                   }{\mathbin}{miny}%
+\UnicodeMathSymbol{"02A00}{\bigodot                  }{\mathop}{n-ary circled dot operator}%
+\UnicodeMathSymbol{"02A01}{\bigoplus                 }{\mathop}{n-ary circled plus operator}%
+\UnicodeMathSymbol{"02A02}{\bigotimes                }{\mathop}{n-ary circled times operator}%
+\UnicodeMathSymbol{"02A03}{\bigcupdot                }{\mathop}{n-ary union operator with dot}%
+\UnicodeMathSymbol{"02A04}{\biguplus                 }{\mathop}{n-ary union operator with plus}%
+\UnicodeMathSymbol{"02A05}{\bigsqcap                 }{\mathop}{n-ary square intersection operator}%
+\UnicodeMathSymbol{"02A06}{\bigsqcup                 }{\mathop}{n-ary square union operator}%
+\UnicodeMathSymbol{"02A07}{\conjquant                }{\mathop}{two logical and operator}%
+\UnicodeMathSymbol{"02A08}{\disjquant                }{\mathop}{two logical or operator}%
+\UnicodeMathSymbol{"02A09}{\bigtimes                 }{\mathop}{n-ary times operator}%
+\UnicodeMathSymbol{"02A0A}{\modtwosum                }{\mathop}{modulo two sum}%
+\UnicodeMathSymbol{"02A0B}{\sumint                   }{\mathop}{summation with integral}%
+\UnicodeMathSymbol{"02A0C}{\iiiint                   }{\mathop}{quadruple integral operator}%
+\UnicodeMathSymbol{"02A0D}{\intbar                   }{\mathop}{finite part integral}%
+\UnicodeMathSymbol{"02A0E}{\intBar                   }{\mathop}{integral with double stroke}%
+\UnicodeMathSymbol{"02A0F}{\fint                     }{\mathop}{integral average with slash}%
+\UnicodeMathSymbol{"02A10}{\cirfnint                 }{\mathop}{circulation function}%
+\UnicodeMathSymbol{"02A11}{\awint                    }{\mathop}{anticlockwise integration}%
+\UnicodeMathSymbol{"02A12}{\rppolint                 }{\mathop}{line integration with rectangular path around pole}%
+\UnicodeMathSymbol{"02A13}{\scpolint                 }{\mathop}{line integration with semicircular path around pole}%
+\UnicodeMathSymbol{"02A14}{\npolint                  }{\mathop}{line integration not including the pole}%
+\UnicodeMathSymbol{"02A15}{\pointint                 }{\mathop}{integral around a point operator}%
+\UnicodeMathSymbol{"02A16}{\sqint                    }{\mathop}{quaternion integral operator}%
+\UnicodeMathSymbol{"02A17}{\intlarhk                 }{\mathop}{integral with leftwards arrow with hook}%
+\UnicodeMathSymbol{"02A18}{\intx                     }{\mathop}{integral with times sign}%
+\UnicodeMathSymbol{"02A19}{\intcap                   }{\mathop}{integral with intersection}%
+\UnicodeMathSymbol{"02A1A}{\intcup                   }{\mathop}{integral with union}%
+\UnicodeMathSymbol{"02A1B}{\upint                    }{\mathop}{integral with overbar}%
+\UnicodeMathSymbol{"02A1C}{\lowint                   }{\mathop}{integral with underbar}%
+\UnicodeMathSymbol{"02A1D}{\Join                     }{\mathop}{join}%
+\UnicodeMathSymbol{"02A1E}{\bigtriangleleft          }{\mathop}{large left triangle operator}%
+\UnicodeMathSymbol{"02A1F}{\zcmp                     }{\mathop}{z notation schema composition}%
+\UnicodeMathSymbol{"02A20}{\zpipe                    }{\mathop}{z notation schema piping}%
+\UnicodeMathSymbol{"02A21}{\zproject                 }{\mathop}{z notation schema projection}%
+\UnicodeMathSymbol{"02A22}{\ringplus                 }{\mathbin}{plus sign with small circle above}%
+\UnicodeMathSymbol{"02A23}{\plushat                  }{\mathbin}{plus sign with circumflex accent above}%
+\UnicodeMathSymbol{"02A24}{\simplus                  }{\mathbin}{plus sign with tilde above}%
+\UnicodeMathSymbol{"02A25}{\plusdot                  }{\mathbin}{plus sign with dot below}%
+\UnicodeMathSymbol{"02A26}{\plussim                  }{\mathbin}{plus sign with tilde below}%
+\UnicodeMathSymbol{"02A27}{\plussubtwo               }{\mathbin}{plus sign with subscript two}%
+\UnicodeMathSymbol{"02A28}{\plustrif                 }{\mathbin}{plus sign with black triangle}%
+\UnicodeMathSymbol{"02A29}{\commaminus               }{\mathbin}{minus sign with comma above}%
+\UnicodeMathSymbol{"02A2A}{\minusdot                 }{\mathbin}{minus sign with dot below}%
+\UnicodeMathSymbol{"02A2B}{\minusfdots               }{\mathbin}{minus sign with falling dots}%
+\UnicodeMathSymbol{"02A2C}{\minusrdots               }{\mathbin}{minus sign with rising dots}%
+\UnicodeMathSymbol{"02A2D}{\opluslhrim               }{\mathbin}{plus sign in left half circle}%
+\UnicodeMathSymbol{"02A2E}{\oplusrhrim               }{\mathbin}{plus sign in right half circle}%
+\UnicodeMathSymbol{"02A2F}{\vectimes                 }{\mathbin}{vector or cross product}%
+\UnicodeMathSymbol{"02A30}{\dottimes                 }{\mathbin}{multiplication sign with dot above}%
+\UnicodeMathSymbol{"02A31}{\timesbar                 }{\mathbin}{multiplication sign with underbar}%
+\UnicodeMathSymbol{"02A32}{\btimes                   }{\mathbin}{semidirect product with bottom closed}%
+\UnicodeMathSymbol{"02A33}{\smashtimes               }{\mathbin}{smash product}%
+\UnicodeMathSymbol{"02A34}{\otimeslhrim              }{\mathbin}{multiplication sign in left half circle}%
+\UnicodeMathSymbol{"02A35}{\otimesrhrim              }{\mathbin}{multiplication sign in right half circle}%
+\UnicodeMathSymbol{"02A36}{\otimeshat                }{\mathbin}{circled multiplication sign with circumflex accent}%
+\UnicodeMathSymbol{"02A37}{\Otimes                   }{\mathbin}{multiplication sign in double circle}%
+\UnicodeMathSymbol{"02A38}{\odiv                     }{\mathbin}{circled division sign}%
+\UnicodeMathSymbol{"02A39}{\triangleplus             }{\mathbin}{plus sign in triangle}%
+\UnicodeMathSymbol{"02A3A}{\triangleminus            }{\mathbin}{minus sign in triangle}%
+\UnicodeMathSymbol{"02A3B}{\triangletimes            }{\mathbin}{multiplication sign in triangle}%
+\UnicodeMathSymbol{"02A3C}{\intprod                  }{\mathbin}{interior product}%
+\UnicodeMathSymbol{"02A3D}{\intprodr                 }{\mathbin}{righthand interior product}%
+\UnicodeMathSymbol{"02A3E}{\fcmp                     }{\mathbin}{z notation relational composition}%
+\UnicodeMathSymbol{"02A3F}{\amalg                    }{\mathbin}{amalgamation or coproduct}%
+\UnicodeMathSymbol{"02A40}{\capdot                   }{\mathbin}{intersection with dot}%
+\UnicodeMathSymbol{"02A41}{\uminus                   }{\mathbin}{union with minus sign}%
+\UnicodeMathSymbol{"02A42}{\barcup                   }{\mathbin}{union with overbar}%
+\UnicodeMathSymbol{"02A43}{\barcap                   }{\mathbin}{intersection with overbar}%
+\UnicodeMathSymbol{"02A44}{\capwedge                 }{\mathbin}{intersection with logical and}%
+\UnicodeMathSymbol{"02A45}{\cupvee                   }{\mathbin}{union with logical or}%
+\UnicodeMathSymbol{"02A46}{\cupovercap               }{\mathbin}{union above intersection}%
+\UnicodeMathSymbol{"02A47}{\capovercup               }{\mathbin}{intersection above union}%
+\UnicodeMathSymbol{"02A48}{\cupbarcap                }{\mathbin}{union above bar above intersection}%
+\UnicodeMathSymbol{"02A49}{\capbarcup                }{\mathbin}{intersection above bar above union}%
+\UnicodeMathSymbol{"02A4A}{\twocups                  }{\mathbin}{union beside and joined with union}%
+\UnicodeMathSymbol{"02A4B}{\twocaps                  }{\mathbin}{intersection beside and joined with intersection}%
+\UnicodeMathSymbol{"02A4C}{\closedvarcup             }{\mathbin}{closed union with serifs}%
+\UnicodeMathSymbol{"02A4D}{\closedvarcap             }{\mathbin}{closed intersection with serifs}%
+\UnicodeMathSymbol{"02A4E}{\Sqcap                    }{\mathbin}{double square intersection}%
+\UnicodeMathSymbol{"02A4F}{\Sqcup                    }{\mathbin}{double square union}%
+\UnicodeMathSymbol{"02A50}{\closedvarcupsmashprod    }{\mathbin}{closed union with serifs and smash product}%
+\UnicodeMathSymbol{"02A51}{\wedgeodot                }{\mathbin}{logical and with dot above}%
+\UnicodeMathSymbol{"02A52}{\veeodot                  }{\mathbin}{logical or with dot above}%
+\UnicodeMathSymbol{"02A53}{\Wedge                    }{\mathbin}{double logical and}%
+\UnicodeMathSymbol{"02A54}{\Vee                      }{\mathbin}{double logical or}%
+\UnicodeMathSymbol{"02A55}{\wedgeonwedge             }{\mathbin}{two intersecting logical and}%
+\UnicodeMathSymbol{"02A56}{\veeonvee                 }{\mathbin}{two intersecting logical or}%
+\UnicodeMathSymbol{"02A57}{\bigslopedvee             }{\mathbin}{sloping large or}%
+\UnicodeMathSymbol{"02A58}{\bigslopedwedge           }{\mathbin}{sloping large and}%
+\UnicodeMathSymbol{"02A59}{\veeonwedge               }{\mathrel}{logical or overlapping logical and}%
+\UnicodeMathSymbol{"02A5A}{\wedgemidvert             }{\mathbin}{logical and with middle stem}%
+\UnicodeMathSymbol{"02A5B}{\veemidvert               }{\mathbin}{logical or with middle stem}%
+\UnicodeMathSymbol{"02A5C}{\midbarwedge              }{\mathbin}{ogical and with horizontal dash}%
+\UnicodeMathSymbol{"02A5D}{\midbarvee                }{\mathbin}{logical or with horizontal dash}%
+\UnicodeMathSymbol{"02A5E}{\doublebarwedge           }{\mathbin}{logical and with double overbar}%
+\UnicodeMathSymbol{"02A5F}{\wedgebar                 }{\mathbin}{logical and with underbar}%
+\UnicodeMathSymbol{"02A60}{\wedgedoublebar           }{\mathbin}{logical and with double underbar}%
+\UnicodeMathSymbol{"02A61}{\varveebar                }{\mathbin}{small vee with underbar}%
+\UnicodeMathSymbol{"02A62}{\doublebarvee             }{\mathbin}{logical or with double overbar}%
+\UnicodeMathSymbol{"02A63}{\veedoublebar             }{\mathbin}{logical or with double underbar}%
+\UnicodeMathSymbol{"02A64}{\dsub                     }{\mathbin}{z notation domain antirestriction}%
+\UnicodeMathSymbol{"02A65}{\rsub                     }{\mathbin}{z notation range antirestriction}%
+\UnicodeMathSymbol{"02A66}{\eqdot                    }{\mathrel}{equals sign with dot below}%
+\UnicodeMathSymbol{"02A67}{\dotequiv                 }{\mathrel}{identical with dot above}%
+\UnicodeMathSymbol{"02A68}{\equivVert                }{\mathrel}{triple horizontal bar with double vertical stroke}%
+\UnicodeMathSymbol{"02A69}{\equivVvert               }{\mathrel}{triple horizontal bar with triple vertical stroke}%
+\UnicodeMathSymbol{"02A6A}{\dotsim                   }{\mathrel}{tilde operator with dot above}%
+\UnicodeMathSymbol{"02A6B}{\simrdots                 }{\mathrel}{tilde operator with rising dots}%
+\UnicodeMathSymbol{"02A6C}{\simminussim              }{\mathrel}{similar minus similar}%
+\UnicodeMathSymbol{"02A6D}{\congdot                  }{\mathrel}{congruent with dot above}%
+\UnicodeMathSymbol{"02A6E}{\asteq                    }{\mathrel}{equals with asterisk}%
+\UnicodeMathSymbol{"02A6F}{\hatapprox                }{\mathrel}{almost equal to with circumflex accent}%
+\UnicodeMathSymbol{"02A70}{\approxeqq                }{\mathrel}{approximately equal or equal to}%
+\UnicodeMathSymbol{"02A71}{\eqqplus                  }{\mathbin}{equals sign above plus sign}%
+\UnicodeMathSymbol{"02A72}{\pluseqq                  }{\mathbin}{plus sign above equals sign}%
+\UnicodeMathSymbol{"02A73}{\eqqsim                   }{\mathrel}{equals sign above tilde operator}%
+\UnicodeMathSymbol{"02A74}{\Coloneq                  }{\mathrel}{double colon equal}%
+\UnicodeMathSymbol{"02A75}{\eqeq                     }{\mathrel}{two consecutive equals signs}%
+\UnicodeMathSymbol{"02A76}{\eqeqeq                   }{\mathrel}{three consecutive equals signs}%
+\UnicodeMathSymbol{"02A77}{\ddotseq                  }{\mathrel}{equals sign with two dots above and two dots below}%
+\UnicodeMathSymbol{"02A78}{\equivDD                  }{\mathrel}{equivalent with four dots above}%
+\UnicodeMathSymbol{"02A79}{\ltcir                    }{\mathrel}{less-than with circle inside}%
+\UnicodeMathSymbol{"02A7A}{\gtcir                    }{\mathrel}{greater-than with circle inside}%
+\UnicodeMathSymbol{"02A7B}{\ltquest                  }{\mathrel}{less-than with question mark above}%
+\UnicodeMathSymbol{"02A7C}{\gtquest                  }{\mathrel}{greater-than with question mark above}%
+\UnicodeMathSymbol{"02A7D}{\leqslant                 }{\mathrel}{less-than or slanted equal to}%
+\UnicodeMathSymbol{"02A7E}{\geqslant                 }{\mathrel}{greater-than or slanted equal to}%
+\UnicodeMathSymbol{"02A7F}{\lesdot                   }{\mathrel}{less-than or slanted equal to with dot inside}%
+\UnicodeMathSymbol{"02A80}{\gesdot                   }{\mathrel}{greater-than or slanted equal to with dot inside}%
+\UnicodeMathSymbol{"02A81}{\lesdoto                  }{\mathrel}{less-than or slanted equal to with dot above}%
+\UnicodeMathSymbol{"02A82}{\gesdoto                  }{\mathrel}{greater-than or slanted equal to with dot above}%
+\UnicodeMathSymbol{"02A83}{\lesdotor                 }{\mathrel}{less-than or slanted equal to with dot above right}%
+\UnicodeMathSymbol{"02A84}{\gesdotol                 }{\mathrel}{greater-than or slanted equal to with dot above left}%
+\UnicodeMathSymbol{"02A85}{\lessapprox               }{\mathrel}{less-than or approximate}%
+\UnicodeMathSymbol{"02A86}{\gtrapprox                }{\mathrel}{greater-than or approximate}%
+\UnicodeMathSymbol{"02A87}{\lneq                     }{\mathrel}{less-than and single-line not equal to}%
+\UnicodeMathSymbol{"02A88}{\gneq                     }{\mathrel}{greater-than and single-line not equal to}%
+\UnicodeMathSymbol{"02A89}{\lnapprox                 }{\mathrel}{less-than and not approximate}%
+\UnicodeMathSymbol{"02A8A}{\gnapprox                 }{\mathrel}{greater-than and not approximate}%
+\UnicodeMathSymbol{"02A8B}{\lesseqqgtr               }{\mathrel}{less-than above double-line equal above greater-than}%
+\UnicodeMathSymbol{"02A8C}{\gtreqqless               }{\mathrel}{greater-than above double-line equal above less-than}%
+\UnicodeMathSymbol{"02A8D}{\lsime                    }{\mathrel}{less-than above similar or equal}%
+\UnicodeMathSymbol{"02A8E}{\gsime                    }{\mathrel}{greater-than above similar or equal}%
+\UnicodeMathSymbol{"02A8F}{\lsimg                    }{\mathrel}{less-than above similar above greater-than}%
+\UnicodeMathSymbol{"02A90}{\gsiml                    }{\mathrel}{greater-than above similar above less-than}%
+\UnicodeMathSymbol{"02A91}{\lgE                      }{\mathrel}{less-than above greater-than above double-line equal}%
+\UnicodeMathSymbol{"02A92}{\glE                      }{\mathrel}{greater-than above less-than above double-line equal}%
+\UnicodeMathSymbol{"02A93}{\lesges                   }{\mathrel}{less-than above slanted equal above greater-than above slanted equal}%
+\UnicodeMathSymbol{"02A94}{\gesles                   }{\mathrel}{greater-than above slanted equal above less-than above slanted equal}%
+\UnicodeMathSymbol{"02A95}{\eqslantless              }{\mathrel}{slanted equal to or less-than}%
+\UnicodeMathSymbol{"02A96}{\eqslantgtr               }{\mathrel}{slanted equal to or greater-than}%
+\UnicodeMathSymbol{"02A97}{\elsdot                   }{\mathrel}{slanted equal to or less-than with dot inside}%
+\UnicodeMathSymbol{"02A98}{\egsdot                   }{\mathrel}{slanted equal to or greater-than with dot inside}%
+\UnicodeMathSymbol{"02A99}{\eqqless                  }{\mathrel}{double-line equal to or less-than}%
+\UnicodeMathSymbol{"02A9A}{\eqqgtr                   }{\mathrel}{double-line equal to or greater-than}%
+\UnicodeMathSymbol{"02A9B}{\eqqslantless             }{\mathrel}{double-line slanted equal to or less-than}%
+\UnicodeMathSymbol{"02A9C}{\eqqslantgtr              }{\mathrel}{double-line slanted equal to or greater-than}%
+\UnicodeMathSymbol{"02A9D}{\simless                  }{\mathrel}{similar or less-than}%
+\UnicodeMathSymbol{"02A9E}{\simgtr                   }{\mathrel}{similar or greater-than}%
+\UnicodeMathSymbol{"02A9F}{\simlE                    }{\mathrel}{similar above less-than above equals sign}%
+\UnicodeMathSymbol{"02AA0}{\simgE                    }{\mathrel}{similar above greater-than above equals sign}%
+\UnicodeMathSymbol{"02AA1}{\Lt                       }{\mathrel}{double nested less-than}%
+\UnicodeMathSymbol{"02AA2}{\Gt                       }{\mathrel}{double nested greater-than}%
+\UnicodeMathSymbol{"02AA3}{\partialmeetcontraction   }{\mathrel}{double less-than with underbar}%
+\UnicodeMathSymbol{"02AA4}{\glj                      }{\mathrel}{greater-than overlapping less-than}%
+\UnicodeMathSymbol{"02AA5}{\gla                      }{\mathrel}{greater-than beside less-than}%
+\UnicodeMathSymbol{"02AA6}{\ltcc                     }{\mathrel}{less-than closed by curve}%
+\UnicodeMathSymbol{"02AA7}{\gtcc                     }{\mathrel}{greater-than closed by curve}%
+\UnicodeMathSymbol{"02AA8}{\lescc                    }{\mathrel}{less-than closed by curve above slanted equal}%
+\UnicodeMathSymbol{"02AA9}{\gescc                    }{\mathrel}{greater-than closed by curve above slanted equal}%
+\UnicodeMathSymbol{"02AAA}{\smt                      }{\mathrel}{smaller than}%
+\UnicodeMathSymbol{"02AAB}{\lat                      }{\mathrel}{larger than}%
+\UnicodeMathSymbol{"02AAC}{\smte                     }{\mathrel}{smaller than or equal to}%
+\UnicodeMathSymbol{"02AAD}{\late                     }{\mathrel}{larger than or equal to}%
+\UnicodeMathSymbol{"02AAE}{\bumpeqq                  }{\mathrel}{equals sign with bumpy above}%
+\UnicodeMathSymbol{"02AAF}{\preceq                   }{\mathrel}{precedes above single-line equals sign}%
+\UnicodeMathSymbol{"02AB0}{\succeq                   }{\mathrel}{succeeds above single-line equals sign}%
+\UnicodeMathSymbol{"02AB1}{\precneq                  }{\mathrel}{precedes above single-line not equal to}%
+\UnicodeMathSymbol{"02AB2}{\succneq                  }{\mathrel}{succeeds above single-line not equal to}%
+\UnicodeMathSymbol{"02AB3}{\preceqq                  }{\mathrel}{precedes above equals sign}%
+\UnicodeMathSymbol{"02AB4}{\succeqq                  }{\mathrel}{succeeds above equals sign}%
+\UnicodeMathSymbol{"02AB5}{\precneqq                 }{\mathrel}{precedes above not equal to}%
+\UnicodeMathSymbol{"02AB6}{\succneqq                 }{\mathrel}{succeeds above not equal to}%
+\UnicodeMathSymbol{"02AB7}{\precapprox               }{\mathrel}{precedes above almost equal to}%
+\UnicodeMathSymbol{"02AB8}{\succapprox               }{\mathrel}{succeeds above almost equal to}%
+\UnicodeMathSymbol{"02AB9}{\precnapprox              }{\mathrel}{precedes above not almost equal to}%
+\UnicodeMathSymbol{"02ABA}{\succnapprox              }{\mathrel}{succeeds above not almost equal to}%
+\UnicodeMathSymbol{"02ABB}{\Prec                     }{\mathrel}{double precedes}%
+\UnicodeMathSymbol{"02ABC}{\Succ                     }{\mathrel}{double succeeds}%
+\UnicodeMathSymbol{"02ABD}{\subsetdot                }{\mathrel}{subset with dot}%
+\UnicodeMathSymbol{"02ABE}{\supsetdot                }{\mathrel}{superset with dot}%
+\UnicodeMathSymbol{"02ABF}{\subsetplus               }{\mathrel}{subset with plus sign below}%
+\UnicodeMathSymbol{"02AC0}{\supsetplus               }{\mathrel}{superset with plus sign below}%
+\UnicodeMathSymbol{"02AC1}{\submult                  }{\mathrel}{subset with multiplication sign below}%
+\UnicodeMathSymbol{"02AC2}{\supmult                  }{\mathrel}{superset with multiplication sign below}%
+\UnicodeMathSymbol{"02AC3}{\subedot                  }{\mathrel}{subset of or equal to with dot above}%
+\UnicodeMathSymbol{"02AC4}{\supedot                  }{\mathrel}{superset of or equal to with dot above}%
+\UnicodeMathSymbol{"02AC5}{\subseteqq                }{\mathrel}{subset of above equals sign}%
+\UnicodeMathSymbol{"02AC6}{\supseteqq                }{\mathrel}{superset of above equals sign}%
+\UnicodeMathSymbol{"02AC7}{\subsim                   }{\mathrel}{subset of above tilde operator}%
+\UnicodeMathSymbol{"02AC8}{\supsim                   }{\mathrel}{superset of above tilde operator}%
+\UnicodeMathSymbol{"02AC9}{\subsetapprox             }{\mathrel}{subset of above almost equal to}%
+\UnicodeMathSymbol{"02ACA}{\supsetapprox             }{\mathrel}{superset of above almost equal to}%
+\UnicodeMathSymbol{"02ACB}{\subsetneqq               }{\mathrel}{subset of above not equal to}%
+\UnicodeMathSymbol{"02ACC}{\supsetneqq               }{\mathrel}{superset of above not equal to}%
+\UnicodeMathSymbol{"02ACD}{\lsqhook                  }{\mathrel}{square left open box operator}%
+\UnicodeMathSymbol{"02ACE}{\rsqhook                  }{\mathrel}{square right open box operator}%
+\UnicodeMathSymbol{"02ACF}{\csub                     }{\mathrel}{closed subset}%
+\UnicodeMathSymbol{"02AD0}{\csup                     }{\mathrel}{closed superset}%
+\UnicodeMathSymbol{"02AD1}{\csube                    }{\mathrel}{closed subset or equal to}%
+\UnicodeMathSymbol{"02AD2}{\csupe                    }{\mathrel}{closed superset or equal to}%
+\UnicodeMathSymbol{"02AD3}{\subsup                   }{\mathrel}{subset above superset}%
+\UnicodeMathSymbol{"02AD4}{\supsub                   }{\mathrel}{superset above subset}%
+\UnicodeMathSymbol{"02AD5}{\subsub                   }{\mathrel}{subset above subset}%
+\UnicodeMathSymbol{"02AD6}{\supsup                   }{\mathrel}{superset above superset}%
+\UnicodeMathSymbol{"02AD7}{\suphsub                  }{\mathrel}{superset beside subset}%
+\UnicodeMathSymbol{"02AD8}{\supdsub                  }{\mathrel}{superset beside and joined by dash with subset}%
+\UnicodeMathSymbol{"02AD9}{\forkv                    }{\mathrel}{element of opening downwards}%
+\UnicodeMathSymbol{"02ADA}{\topfork                  }{\mathrel}{pitchfork with tee top}%
+\UnicodeMathSymbol{"02ADB}{\mlcp                     }{\mathrel}{transversal intersection}%
+\UnicodeMathSymbol{"02ADC}{\forks                    }{\mathrel}{forking}%
+\UnicodeMathSymbol{"02ADD}{\forksnot                 }{\mathrel}{nonforking}%
+\UnicodeMathSymbol{"02ADE}{\shortlefttack            }{\mathrel}{short left tack}%
+\UnicodeMathSymbol{"02ADF}{\shortdowntack            }{\mathrel}{short down tack}%
+\UnicodeMathSymbol{"02AE0}{\shortuptack              }{\mathrel}{short up tack}%
+\UnicodeMathSymbol{"02AE1}{\perps                    }{\mathord}{perpendicular with s}%
+\UnicodeMathSymbol{"02AE2}{\vDdash                   }{\mathrel}{vertical bar triple right turnstile}%
+\UnicodeMathSymbol{"02AE3}{\dashV                    }{\mathrel}{double vertical bar left turnstile}%
+\UnicodeMathSymbol{"02AE4}{\Dashv                    }{\mathrel}{vertical bar double left turnstile}%
+\UnicodeMathSymbol{"02AE5}{\DashV                    }{\mathrel}{double vertical bar double left turnstile}%
+\UnicodeMathSymbol{"02AE6}{\varVdash                 }{\mathrel}{long dash from left member of double vertical}%
+\UnicodeMathSymbol{"02AE7}{\Barv                     }{\mathrel}{short down tack with overbar}%
+\UnicodeMathSymbol{"02AE8}{\vBar                     }{\mathrel}{short up tack with underbar}%
+\UnicodeMathSymbol{"02AE9}{\vBarv                    }{\mathrel}{short up tack above short down tack}%
+\UnicodeMathSymbol{"02AEA}{\barV                     }{\mathrel}{double down tack}%
+\UnicodeMathSymbol{"02AEB}{\Vbar                     }{\mathrel}{double up tack}%
+\UnicodeMathSymbol{"02AEC}{\Not                      }{\mathrel}{double stroke not sign}%
+\UnicodeMathSymbol{"02AED}{\bNot                     }{\mathrel}{reversed double stroke not sign}%
+\UnicodeMathSymbol{"02AEE}{\revnmid                  }{\mathrel}{does not divide with reversed negation slash}%
+\UnicodeMathSymbol{"02AEF}{\cirmid                   }{\mathrel}{vertical line with circle above}%
+\UnicodeMathSymbol{"02AF0}{\midcir                   }{\mathrel}{vertical line with circle below}%
+\UnicodeMathSymbol{"02AF1}{\topcir                   }{\mathord}{down tack with circle below}%
+\UnicodeMathSymbol{"02AF2}{\nhpar                    }{\mathrel}{parallel with horizontal stroke}%
+\UnicodeMathSymbol{"02AF3}{\parsim                   }{\mathrel}{parallel with tilde operator}%
+\UnicodeMathSymbol{"02AF4}{\interleave               }{\mathbin}{triple vertical bar binary relation}%
+\UnicodeMathSymbol{"02AF5}{\nhVvert                  }{\mathbin}{triple vertical bar with horizontal stroke}%
+\UnicodeMathSymbol{"02AF6}{\threedotcolon            }{\mathbin}{triple colon operator}%
+\UnicodeMathSymbol{"02AF7}{\lllnest                  }{\mathrel}{stacked very much less-than}%
+\UnicodeMathSymbol{"02AF8}{\gggnest                  }{\mathrel}{stacked very much greater-than}%
+\UnicodeMathSymbol{"02AF9}{\leqqslant                }{\mathrel}{double-line slanted less-than or equal to}%
+\UnicodeMathSymbol{"02AFA}{\geqqslant                }{\mathrel}{double-line slanted greater-than or equal to}%
+\UnicodeMathSymbol{"02AFB}{\trslash                  }{\mathbin}{triple solidus binary relation}%
+\UnicodeMathSymbol{"02AFC}{\biginterleave            }{\mathop}{large triple vertical bar operator}%
+\UnicodeMathSymbol{"02AFD}{\sslash                   }{\mathbin}{double solidus operator}%
+\UnicodeMathSymbol{"02AFE}{\talloblong               }{\mathbin}{white vertical bar}%
+\UnicodeMathSymbol{"02AFF}{\bigtalloblong            }{\mathop}{n-ary white vertical bar}%
+\UnicodeMathSymbol{"02B12}{\squaretopblack           }{\mathord}{square with top half black}%
+\UnicodeMathSymbol{"02B13}{\squarebotblack           }{\mathord}{square with bottom half black}%
+\UnicodeMathSymbol{"02B14}{\squareurblack            }{\mathord}{square with upper right diagonal half black}%
+\UnicodeMathSymbol{"02B15}{\squarellblack            }{\mathord}{square with lower left diagonal half black}%
+\UnicodeMathSymbol{"02B16}{\diamondleftblack         }{\mathord}{diamond with left half black}%
+\UnicodeMathSymbol{"02B17}{\diamondrightblack        }{\mathord}{diamond with right half black}%
+\UnicodeMathSymbol{"02B18}{\diamondtopblack          }{\mathord}{diamond with top half black}%
+\UnicodeMathSymbol{"02B19}{\diamondbotblack          }{\mathord}{diamond with bottom half black}%
+\UnicodeMathSymbol{"02B1A}{\dottedsquare             }{\mathord}{dotted square}%
+\UnicodeMathSymbol{"02B1B}{\lgblksquare              }{\mathord}{black large square}%
+\UnicodeMathSymbol{"02B1C}{\lgwhtsquare              }{\mathord}{white large square}%
+\UnicodeMathSymbol{"02B1D}{\vysmblksquare            }{\mathord}{black very small square}%
+\UnicodeMathSymbol{"02B1E}{\vysmwhtsquare            }{\mathord}{white very small square}%
+\UnicodeMathSymbol{"02B1F}{\pentagonblack            }{\mathord}{black pentagon}%
+\UnicodeMathSymbol{"02B20}{\pentagon                 }{\mathord}{white pentagon}%
+\UnicodeMathSymbol{"02B21}{\varhexagon               }{\mathord}{white hexagon}%
+\UnicodeMathSymbol{"02B22}{\varhexagonblack          }{\mathord}{black hexagon}%
+\UnicodeMathSymbol{"02B23}{\hexagonblack             }{\mathord}{horizontal black hexagon}%
+\UnicodeMathSymbol{"02B24}{\lgblkcircle              }{\mathord}{black large circle}%
+\UnicodeMathSymbol{"02B25}{\mdblkdiamond             }{\mathord}{black medium diamond}%
+\UnicodeMathSymbol{"02B26}{\mdwhtdiamond             }{\mathord}{white medium diamond}%
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+\UnicodeMathSymbol{"02B3E}{\leftarrowx               }{\mathrel}{leftwards arrow through x}%
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+\UnicodeMathSymbol{"1D71E}{\mbfitGamma               }{\mathalpha}{mathematical bold italic capital gamma}%
+\UnicodeMathSymbol{"1D71F}{\mbfitDelta               }{\mathalpha}{mathematical bold italic capital delta}%
+\UnicodeMathSymbol{"1D720}{\mbfitEpsilon             }{\mathalpha}{mathematical bold italic capital epsilon}%
+\UnicodeMathSymbol{"1D721}{\mbfitZeta                }{\mathalpha}{mathematical bold italic capital zeta}%
+\UnicodeMathSymbol{"1D722}{\mbfitEta                 }{\mathalpha}{mathematical bold italic capital eta}%
+\UnicodeMathSymbol{"1D723}{\mbfitTheta               }{\mathalpha}{mathematical bold italic capital theta}%
+\UnicodeMathSymbol{"1D724}{\mbfitIota                }{\mathalpha}{mathematical bold italic capital iota}%
+\UnicodeMathSymbol{"1D725}{\mbfitKappa               }{\mathalpha}{mathematical bold italic capital kappa}%
+\UnicodeMathSymbol{"1D726}{\mbfitLambda              }{\mathalpha}{mathematical bold italic capital lambda}%
+\UnicodeMathSymbol{"1D727}{\mbfitMu                  }{\mathalpha}{mathematical bold italic capital mu}%
+\UnicodeMathSymbol{"1D728}{\mbfitNu                  }{\mathalpha}{mathematical bold italic capital nu}%
+\UnicodeMathSymbol{"1D729}{\mbfitXi                  }{\mathalpha}{mathematical bold italic capital xi}%
+\UnicodeMathSymbol{"1D72A}{\mbfitOmicron             }{\mathalpha}{mathematical bold italic capital omicron}%
+\UnicodeMathSymbol{"1D72B}{\mbfitPi                  }{\mathalpha}{mathematical bold italic capital pi}%
+\UnicodeMathSymbol{"1D72C}{\mbfitRho                 }{\mathalpha}{mathematical bold italic capital rho}%
+\UnicodeMathSymbol{"1D72D}{\mbfitvarTheta            }{\mathalpha}{mathematical bold italic capital theta symbol}%
+\UnicodeMathSymbol{"1D72E}{\mbfitSigma               }{\mathalpha}{mathematical bold italic capital sigma}%
+\UnicodeMathSymbol{"1D72F}{\mbfitTau                 }{\mathalpha}{mathematical bold italic capital tau}%
+\UnicodeMathSymbol{"1D730}{\mbfitUpsilon             }{\mathalpha}{mathematical bold italic capital upsilon}%
+\UnicodeMathSymbol{"1D731}{\mbfitPhi                 }{\mathalpha}{mathematical bold italic capital phi}%
+\UnicodeMathSymbol{"1D732}{\mbfitChi                 }{\mathalpha}{mathematical bold italic capital chi}%
+\UnicodeMathSymbol{"1D733}{\mbfitPsi                 }{\mathalpha}{mathematical bold italic capital psi}%
+\UnicodeMathSymbol{"1D734}{\mbfitOmega               }{\mathalpha}{mathematical bold italic capital omega}%
+\UnicodeMathSymbol{"1D735}{\mbfitnabla               }{\mathalpha}{mathematical bold italic nabla}%
+\UnicodeMathSymbol{"1D736}{\mbfitalpha               }{\mathalpha}{mathematical bold italic small alpha}%
+\UnicodeMathSymbol{"1D737}{\mbfitbeta                }{\mathalpha}{mathematical bold italic small beta}%
+\UnicodeMathSymbol{"1D738}{\mbfitgamma               }{\mathalpha}{mathematical bold italic small gamma}%
+\UnicodeMathSymbol{"1D739}{\mbfitdelta               }{\mathalpha}{mathematical bold italic small delta}%
+\UnicodeMathSymbol{"1D73A}{\mbfitvarepsilon          }{\mathalpha}{mathematical bold italic small varepsilon}%
+\UnicodeMathSymbol{"1D73B}{\mbfitzeta                }{\mathalpha}{mathematical bold italic small zeta}%
+\UnicodeMathSymbol{"1D73C}{\mbfiteta                 }{\mathalpha}{mathematical bold italic small eta}%
+\UnicodeMathSymbol{"1D73D}{\mbfittheta               }{\mathalpha}{mathematical bold italic small theta}%
+\UnicodeMathSymbol{"1D73E}{\mbfitiota                }{\mathalpha}{mathematical bold italic small iota}%
+\UnicodeMathSymbol{"1D73F}{\mbfitkappa               }{\mathalpha}{mathematical bold italic small kappa}%
+\UnicodeMathSymbol{"1D740}{\mbfitlambda              }{\mathalpha}{mathematical bold italic small lambda}%
+\UnicodeMathSymbol{"1D741}{\mbfitmu                  }{\mathalpha}{mathematical bold italic small mu}%
+\UnicodeMathSymbol{"1D742}{\mbfitnu                  }{\mathalpha}{mathematical bold italic small nu}%
+\UnicodeMathSymbol{"1D743}{\mbfitxi                  }{\mathalpha}{mathematical bold italic small xi}%
+\UnicodeMathSymbol{"1D744}{\mbfitomicron             }{\mathalpha}{mathematical bold italic small omicron}%
+\UnicodeMathSymbol{"1D745}{\mbfitpi                  }{\mathalpha}{mathematical bold italic small pi}%
+\UnicodeMathSymbol{"1D746}{\mbfitrho                 }{\mathalpha}{mathematical bold italic small rho}%
+\UnicodeMathSymbol{"1D747}{\mbfitvarsigma            }{\mathalpha}{mathematical bold italic small final sigma}%
+\UnicodeMathSymbol{"1D748}{\mbfitsigma               }{\mathalpha}{mathematical bold italic small sigma}%
+\UnicodeMathSymbol{"1D749}{\mbfittau                 }{\mathalpha}{mathematical bold italic small tau}%
+\UnicodeMathSymbol{"1D74A}{\mbfitupsilon             }{\mathalpha}{mathematical bold italic small upsilon}%
+\UnicodeMathSymbol{"1D74B}{\mbfitvarphi              }{\mathalpha}{mathematical bold italic small phi}%
+\UnicodeMathSymbol{"1D74C}{\mbfitchi                 }{\mathalpha}{mathematical bold italic small chi}%
+\UnicodeMathSymbol{"1D74D}{\mbfitpsi                 }{\mathalpha}{mathematical bold italic small psi}%
+\UnicodeMathSymbol{"1D74E}{\mbfitomega               }{\mathalpha}{mathematical bold italic small omega}%
+\UnicodeMathSymbol{"1D74F}{\mbfitpartial             }{\mathalpha}{mathematical bold italic partial differential}%
+\UnicodeMathSymbol{"1D750}{\mbfitepsilon             }{\mathalpha}{mathematical bold italic varepsilon symbol}%
+\UnicodeMathSymbol{"1D751}{\mbfitvartheta            }{\mathalpha}{mathematical bold italic theta symbol}%
+\UnicodeMathSymbol{"1D752}{\mbfitvarkappa            }{\mathalpha}{mathematical bold italic kappa symbol}%
+\UnicodeMathSymbol{"1D753}{\mbfitphi                 }{\mathalpha}{mathematical bold italic phi symbol}%
+\UnicodeMathSymbol{"1D754}{\mbfitvarrho              }{\mathalpha}{mathematical bold italic rho symbol}%
+\UnicodeMathSymbol{"1D755}{\mbfitvarpi               }{\mathalpha}{mathematical bold italic pi symbol}%
+\UnicodeMathSymbol{"1D756}{\mbfsansAlpha             }{\mathalpha}{mathematical sans-serif bold capital alpha}%
+\UnicodeMathSymbol{"1D757}{\mbfsansBeta              }{\mathalpha}{mathematical sans-serif bold capital beta}%
+\UnicodeMathSymbol{"1D758}{\mbfsansGamma             }{\mathalpha}{mathematical sans-serif bold capital gamma}%
+\UnicodeMathSymbol{"1D759}{\mbfsansDelta             }{\mathalpha}{mathematical sans-serif bold capital delta}%
+\UnicodeMathSymbol{"1D75A}{\mbfsansEpsilon           }{\mathalpha}{mathematical sans-serif bold capital epsilon}%
+\UnicodeMathSymbol{"1D75B}{\mbfsansZeta              }{\mathalpha}{mathematical sans-serif bold capital zeta}%
+\UnicodeMathSymbol{"1D75C}{\mbfsansEta               }{\mathalpha}{mathematical sans-serif bold capital eta}%
+\UnicodeMathSymbol{"1D75D}{\mbfsansTheta             }{\mathalpha}{mathematical sans-serif bold capital theta}%
+\UnicodeMathSymbol{"1D75E}{\mbfsansIota              }{\mathalpha}{mathematical sans-serif bold capital iota}%
+\UnicodeMathSymbol{"1D75F}{\mbfsansKappa             }{\mathalpha}{mathematical sans-serif bold capital kappa}%
+\UnicodeMathSymbol{"1D760}{\mbfsansLambda            }{\mathalpha}{mathematical sans-serif bold capital lambda}%
+\UnicodeMathSymbol{"1D761}{\mbfsansMu                }{\mathalpha}{mathematical sans-serif bold capital mu}%
+\UnicodeMathSymbol{"1D762}{\mbfsansNu                }{\mathalpha}{mathematical sans-serif bold capital nu}%
+\UnicodeMathSymbol{"1D763}{\mbfsansXi                }{\mathalpha}{mathematical sans-serif bold capital xi}%
+\UnicodeMathSymbol{"1D764}{\mbfsansOmicron           }{\mathalpha}{mathematical sans-serif bold capital omicron}%
+\UnicodeMathSymbol{"1D765}{\mbfsansPi                }{\mathalpha}{mathematical sans-serif bold capital pi}%
+\UnicodeMathSymbol{"1D766}{\mbfsansRho               }{\mathalpha}{mathematical sans-serif bold capital rho}%
+\UnicodeMathSymbol{"1D767}{\mbfsansvarTheta          }{\mathalpha}{mathematical sans-serif bold capital theta symbol}%
+\UnicodeMathSymbol{"1D768}{\mbfsansSigma             }{\mathalpha}{mathematical sans-serif bold capital sigma}%
+\UnicodeMathSymbol{"1D769}{\mbfsansTau               }{\mathalpha}{mathematical sans-serif bold capital tau}%
+\UnicodeMathSymbol{"1D76A}{\mbfsansUpsilon           }{\mathalpha}{mathematical sans-serif bold capital upsilon}%
+\UnicodeMathSymbol{"1D76B}{\mbfsansPhi               }{\mathalpha}{mathematical sans-serif bold capital phi}%
+\UnicodeMathSymbol{"1D76C}{\mbfsansChi               }{\mathalpha}{mathematical sans-serif bold capital chi}%
+\UnicodeMathSymbol{"1D76D}{\mbfsansPsi               }{\mathalpha}{mathematical sans-serif bold capital psi}%
+\UnicodeMathSymbol{"1D76E}{\mbfsansOmega             }{\mathalpha}{mathematical sans-serif bold capital omega}%
+\UnicodeMathSymbol{"1D76F}{\mbfsansnabla             }{\mathalpha}{mathematical sans-serif bold nabla}%
+\UnicodeMathSymbol{"1D770}{\mbfsansalpha             }{\mathalpha}{mathematical sans-serif bold small alpha}%
+\UnicodeMathSymbol{"1D771}{\mbfsansbeta              }{\mathalpha}{mathematical sans-serif bold small beta}%
+\UnicodeMathSymbol{"1D772}{\mbfsansgamma             }{\mathalpha}{mathematical sans-serif bold small gamma}%
+\UnicodeMathSymbol{"1D773}{\mbfsansdelta             }{\mathalpha}{mathematical sans-serif bold small delta}%
+\UnicodeMathSymbol{"1D774}{\mbfsansvarepsilon        }{\mathalpha}{mathematical sans-serif bold small varepsilon}%
+\UnicodeMathSymbol{"1D775}{\mbfsanszeta              }{\mathalpha}{mathematical sans-serif bold small zeta}%
+\UnicodeMathSymbol{"1D776}{\mbfsanseta               }{\mathalpha}{mathematical sans-serif bold small eta}%
+\UnicodeMathSymbol{"1D777}{\mbfsanstheta             }{\mathalpha}{mathematical sans-serif bold small theta}%
+\UnicodeMathSymbol{"1D778}{\mbfsansiota              }{\mathalpha}{mathematical sans-serif bold small iota}%
+\UnicodeMathSymbol{"1D779}{\mbfsanskappa             }{\mathalpha}{mathematical sans-serif bold small kappa}%
+\UnicodeMathSymbol{"1D77A}{\mbfsanslambda            }{\mathalpha}{mathematical sans-serif bold small lambda}%
+\UnicodeMathSymbol{"1D77B}{\mbfsansmu                }{\mathalpha}{mathematical sans-serif bold small mu}%
+\UnicodeMathSymbol{"1D77C}{\mbfsansnu                }{\mathalpha}{mathematical sans-serif bold small nu}%
+\UnicodeMathSymbol{"1D77D}{\mbfsansxi                }{\mathalpha}{mathematical sans-serif bold small xi}%
+\UnicodeMathSymbol{"1D77E}{\mbfsansomicron           }{\mathalpha}{mathematical sans-serif bold small omicron}%
+\UnicodeMathSymbol{"1D77F}{\mbfsanspi                }{\mathalpha}{mathematical sans-serif bold small pi}%
+\UnicodeMathSymbol{"1D780}{\mbfsansrho               }{\mathalpha}{mathematical sans-serif bold small rho}%
+\UnicodeMathSymbol{"1D781}{\mbfsansvarsigma          }{\mathalpha}{mathematical sans-serif bold small final sigma}%
+\UnicodeMathSymbol{"1D782}{\mbfsanssigma             }{\mathalpha}{mathematical sans-serif bold small sigma}%
+\UnicodeMathSymbol{"1D783}{\mbfsanstau               }{\mathalpha}{mathematical sans-serif bold small tau}%
+\UnicodeMathSymbol{"1D784}{\mbfsansupsilon           }{\mathalpha}{mathematical sans-serif bold small upsilon}%
+\UnicodeMathSymbol{"1D785}{\mbfsansvarphi            }{\mathalpha}{mathematical sans-serif bold small phi}%
+\UnicodeMathSymbol{"1D786}{\mbfsanschi               }{\mathalpha}{mathematical sans-serif bold small chi}%
+\UnicodeMathSymbol{"1D787}{\mbfsanspsi               }{\mathalpha}{mathematical sans-serif bold small psi}%
+\UnicodeMathSymbol{"1D788}{\mbfsansomega             }{\mathalpha}{mathematical sans-serif bold small omega}%
+\UnicodeMathSymbol{"1D789}{\mbfsanspartial           }{\mathalpha}{mathematical sans-serif bold partial differential}%
+\UnicodeMathSymbol{"1D78A}{\mbfsansepsilon           }{\mathalpha}{mathematical sans-serif bold varepsilon symbol}%
+\UnicodeMathSymbol{"1D78B}{\mbfsansvartheta          }{\mathalpha}{mathematical sans-serif bold theta symbol}%
+\UnicodeMathSymbol{"1D78C}{\mbfsansvarkappa          }{\mathalpha}{mathematical sans-serif bold kappa symbol}%
+\UnicodeMathSymbol{"1D78D}{\mbfsansphi               }{\mathalpha}{mathematical sans-serif bold phi symbol}%
+\UnicodeMathSymbol{"1D78E}{\mbfsansvarrho            }{\mathalpha}{mathematical sans-serif bold rho symbol}%
+\UnicodeMathSymbol{"1D78F}{\mbfsansvarpi             }{\mathalpha}{mathematical sans-serif bold pi symbol}%
+\UnicodeMathSymbol{"1D790}{\mbfitsansAlpha           }{\mathalpha}{mathematical sans-serif bold italic capital alpha}%
+\UnicodeMathSymbol{"1D791}{\mbfitsansBeta            }{\mathalpha}{mathematical sans-serif bold italic capital beta}%
+\UnicodeMathSymbol{"1D792}{\mbfitsansGamma           }{\mathalpha}{mathematical sans-serif bold italic capital gamma}%
+\UnicodeMathSymbol{"1D793}{\mbfitsansDelta           }{\mathalpha}{mathematical sans-serif bold italic capital delta}%
+\UnicodeMathSymbol{"1D794}{\mbfitsansEpsilon         }{\mathalpha}{mathematical sans-serif bold italic capital epsilon}%
+\UnicodeMathSymbol{"1D795}{\mbfitsansZeta            }{\mathalpha}{mathematical sans-serif bold italic capital zeta}%
+\UnicodeMathSymbol{"1D796}{\mbfitsansEta             }{\mathalpha}{mathematical sans-serif bold italic capital eta}%
+\UnicodeMathSymbol{"1D797}{\mbfitsansTheta           }{\mathalpha}{mathematical sans-serif bold italic capital theta}%
+\UnicodeMathSymbol{"1D798}{\mbfitsansIota            }{\mathalpha}{mathematical sans-serif bold italic capital iota}%
+\UnicodeMathSymbol{"1D799}{\mbfitsansKappa           }{\mathalpha}{mathematical sans-serif bold italic capital kappa}%
+\UnicodeMathSymbol{"1D79A}{\mbfitsansLambda          }{\mathalpha}{mathematical sans-serif bold italic capital lambda}%
+\UnicodeMathSymbol{"1D79B}{\mbfitsansMu              }{\mathalpha}{mathematical sans-serif bold italic capital mu}%
+\UnicodeMathSymbol{"1D79C}{\mbfitsansNu              }{\mathalpha}{mathematical sans-serif bold italic capital nu}%
+\UnicodeMathSymbol{"1D79D}{\mbfitsansXi              }{\mathalpha}{mathematical sans-serif bold italic capital xi}%
+\UnicodeMathSymbol{"1D79E}{\mbfitsansOmicron         }{\mathalpha}{mathematical sans-serif bold italic capital omicron}%
+\UnicodeMathSymbol{"1D79F}{\mbfitsansPi              }{\mathalpha}{mathematical sans-serif bold italic capital pi}%
+\UnicodeMathSymbol{"1D7A0}{\mbfitsansRho             }{\mathalpha}{mathematical sans-serif bold italic capital rho}%
+\UnicodeMathSymbol{"1D7A1}{\mbfitsansvarTheta        }{\mathalpha}{mathematical sans-serif bold italic capital theta symbol}%
+\UnicodeMathSymbol{"1D7A2}{\mbfitsansSigma           }{\mathalpha}{mathematical sans-serif bold italic capital sigma}%
+\UnicodeMathSymbol{"1D7A3}{\mbfitsansTau             }{\mathalpha}{mathematical sans-serif bold italic capital tau}%
+\UnicodeMathSymbol{"1D7A4}{\mbfitsansUpsilon         }{\mathalpha}{mathematical sans-serif bold italic capital upsilon}%
+\UnicodeMathSymbol{"1D7A5}{\mbfitsansPhi             }{\mathalpha}{mathematical sans-serif bold italic capital phi}%
+\UnicodeMathSymbol{"1D7A6}{\mbfitsansChi             }{\mathalpha}{mathematical sans-serif bold italic capital chi}%
+\UnicodeMathSymbol{"1D7A7}{\mbfitsansPsi             }{\mathalpha}{mathematical sans-serif bold italic capital psi}%
+\UnicodeMathSymbol{"1D7A8}{\mbfitsansOmega           }{\mathalpha}{mathematical sans-serif bold italic capital omega}%
+\UnicodeMathSymbol{"1D7A9}{\mbfitsansnabla           }{\mathalpha}{mathematical sans-serif bold italic nabla}%
+\UnicodeMathSymbol{"1D7AA}{\mbfitsansalpha           }{\mathalpha}{mathematical sans-serif bold italic small alpha}%
+\UnicodeMathSymbol{"1D7AB}{\mbfitsansbeta            }{\mathalpha}{mathematical sans-serif bold italic small beta}%
+\UnicodeMathSymbol{"1D7AC}{\mbfitsansgamma           }{\mathalpha}{mathematical sans-serif bold italic small gamma}%
+\UnicodeMathSymbol{"1D7AD}{\mbfitsansdelta           }{\mathalpha}{mathematical sans-serif bold italic small delta}%
+\UnicodeMathSymbol{"1D7AE}{\mbfitsansvarepsilon      }{\mathalpha}{mathematical sans-serif bold italic small varepsilon}%
+\UnicodeMathSymbol{"1D7AF}{\mbfitsanszeta            }{\mathalpha}{mathematical sans-serif bold italic small zeta}%
+\UnicodeMathSymbol{"1D7B0}{\mbfitsanseta             }{\mathalpha}{mathematical sans-serif bold italic small eta}%
+\UnicodeMathSymbol{"1D7B1}{\mbfitsanstheta           }{\mathalpha}{mathematical sans-serif bold italic small theta}%
+\UnicodeMathSymbol{"1D7B2}{\mbfitsansiota            }{\mathalpha}{mathematical sans-serif bold italic small iota}%
+\UnicodeMathSymbol{"1D7B3}{\mbfitsanskappa           }{\mathalpha}{mathematical sans-serif bold italic small kappa}%
+\UnicodeMathSymbol{"1D7B4}{\mbfitsanslambda          }{\mathalpha}{mathematical sans-serif bold italic small lambda}%
+\UnicodeMathSymbol{"1D7B5}{\mbfitsansmu              }{\mathalpha}{mathematical sans-serif bold italic small mu}%
+\UnicodeMathSymbol{"1D7B6}{\mbfitsansnu              }{\mathalpha}{mathematical sans-serif bold italic small nu}%
+\UnicodeMathSymbol{"1D7B7}{\mbfitsansxi              }{\mathalpha}{mathematical sans-serif bold italic small xi}%
+\UnicodeMathSymbol{"1D7B8}{\mbfitsansomicron         }{\mathalpha}{mathematical sans-serif bold italic small omicron}%
+\UnicodeMathSymbol{"1D7B9}{\mbfitsanspi              }{\mathalpha}{mathematical sans-serif bold italic small pi}%
+\UnicodeMathSymbol{"1D7BA}{\mbfitsansrho             }{\mathalpha}{mathematical sans-serif bold italic small rho}%
+\UnicodeMathSymbol{"1D7BB}{\mbfitsansvarsigma        }{\mathalpha}{mathematical sans-serif bold italic small final sigma}%
+\UnicodeMathSymbol{"1D7BC}{\mbfitsanssigma           }{\mathalpha}{mathematical sans-serif bold italic small sigma}%
+\UnicodeMathSymbol{"1D7BD}{\mbfitsanstau             }{\mathalpha}{mathematical sans-serif bold italic small tau}%
+\UnicodeMathSymbol{"1D7BE}{\mbfitsansupsilon         }{\mathalpha}{mathematical sans-serif bold italic small upsilon}%
+\UnicodeMathSymbol{"1D7BF}{\mbfitsansvarphi          }{\mathalpha}{mathematical sans-serif bold italic small phi}%
+\UnicodeMathSymbol{"1D7C0}{\mbfitsanschi             }{\mathalpha}{mathematical sans-serif bold italic small chi}%
+\UnicodeMathSymbol{"1D7C1}{\mbfitsanspsi             }{\mathalpha}{mathematical sans-serif bold italic small psi}%
+\UnicodeMathSymbol{"1D7C2}{\mbfitsansomega           }{\mathalpha}{mathematical sans-serif bold italic small omega}%
+\UnicodeMathSymbol{"1D7C3}{\mbfitsanspartial         }{\mathalpha}{mathematical sans-serif bold italic partial differential}%
+\UnicodeMathSymbol{"1D7C4}{\mbfitsansepsilon         }{\mathalpha}{mathematical sans-serif bold italic varepsilon symbol}%
+\UnicodeMathSymbol{"1D7C5}{\mbfitsansvartheta        }{\mathalpha}{mathematical sans-serif bold italic theta symbol}%
+\UnicodeMathSymbol{"1D7C6}{\mbfitsansvarkappa        }{\mathalpha}{mathematical sans-serif bold italic kappa symbol}%
+\UnicodeMathSymbol{"1D7C7}{\mbfitsansphi             }{\mathalpha}{mathematical sans-serif bold italic phi symbol}%
+\UnicodeMathSymbol{"1D7C8}{\mbfitsansvarrho          }{\mathalpha}{mathematical sans-serif bold italic rho symbol}%
+\UnicodeMathSymbol{"1D7C9}{\mbfitsansvarpi           }{\mathalpha}{mathematical sans-serif bold italic pi symbol}%
+\UnicodeMathSymbol{"1D7CA}{\mbfDigamma               }{\mathalpha}{mathematical bold capital digamma}%
+\UnicodeMathSymbol{"1D7CB}{\mbfdigamma               }{\mathalpha}{mathematical bold small digamma}%
+\UnicodeMathSymbol{"1D7CE}{\mbfzero                  }{\mathord}{mathematical bold digit 0}%
+\UnicodeMathSymbol{"1D7CF}{\mbfone                   }{\mathord}{mathematical bold digit 1}%
+\UnicodeMathSymbol{"1D7D0}{\mbftwo                   }{\mathord}{mathematical bold digit 2}%
+\UnicodeMathSymbol{"1D7D1}{\mbfthree                 }{\mathord}{mathematical bold digit 3}%
+\UnicodeMathSymbol{"1D7D2}{\mbffour                  }{\mathord}{mathematical bold digit 4}%
+\UnicodeMathSymbol{"1D7D3}{\mbffive                  }{\mathord}{mathematical bold digit 5}%
+\UnicodeMathSymbol{"1D7D4}{\mbfsix                   }{\mathord}{mathematical bold digit 6}%
+\UnicodeMathSymbol{"1D7D5}{\mbfseven                 }{\mathord}{mathematical bold digit 7}%
+\UnicodeMathSymbol{"1D7D6}{\mbfeight                 }{\mathord}{mathematical bold digit 8}%
+\UnicodeMathSymbol{"1D7D7}{\mbfnine                  }{\mathord}{mathematical bold digit 9}%
+\UnicodeMathSymbol{"1D7D8}{\Bbbzero                  }{\mathord}{mathematical double-struck digit 0}%
+\UnicodeMathSymbol{"1D7D9}{\Bbbone                   }{\mathord}{mathematical double-struck digit 1}%
+\UnicodeMathSymbol{"1D7DA}{\Bbbtwo                   }{\mathord}{mathematical double-struck digit 2}%
+\UnicodeMathSymbol{"1D7DB}{\Bbbthree                 }{\mathord}{mathematical double-struck digit 3}%
+\UnicodeMathSymbol{"1D7DC}{\Bbbfour                  }{\mathord}{mathematical double-struck digit 4}%
+\UnicodeMathSymbol{"1D7DD}{\Bbbfive                  }{\mathord}{mathematical double-struck digit 5}%
+\UnicodeMathSymbol{"1D7DE}{\Bbbsix                   }{\mathord}{mathematical double-struck digit 6}%
+\UnicodeMathSymbol{"1D7DF}{\Bbbseven                 }{\mathord}{mathematical double-struck digit 7}%
+\UnicodeMathSymbol{"1D7E0}{\Bbbeight                 }{\mathord}{mathematical double-struck digit 8}%
+\UnicodeMathSymbol{"1D7E1}{\Bbbnine                  }{\mathord}{mathematical double-struck digit 9}%
+\UnicodeMathSymbol{"1D7E2}{\msanszero                }{\mathord}{mathematical sans-serif digit 0}%
+\UnicodeMathSymbol{"1D7E3}{\msansone                 }{\mathord}{mathematical sans-serif digit 1}%
+\UnicodeMathSymbol{"1D7E4}{\msanstwo                 }{\mathord}{mathematical sans-serif digit 2}%
+\UnicodeMathSymbol{"1D7E5}{\msansthree               }{\mathord}{mathematical sans-serif digit 3}%
+\UnicodeMathSymbol{"1D7E6}{\msansfour                }{\mathord}{mathematical sans-serif digit 4}%
+\UnicodeMathSymbol{"1D7E7}{\msansfive                }{\mathord}{mathematical sans-serif digit 5}%
+\UnicodeMathSymbol{"1D7E8}{\msanssix                 }{\mathord}{mathematical sans-serif digit 6}%
+\UnicodeMathSymbol{"1D7E9}{\msansseven               }{\mathord}{mathematical sans-serif digit 7}%
+\UnicodeMathSymbol{"1D7EA}{\msanseight               }{\mathord}{mathematical sans-serif digit 8}%
+\UnicodeMathSymbol{"1D7EB}{\msansnine                }{\mathord}{mathematical sans-serif digit 9}%
+\UnicodeMathSymbol{"1D7EC}{\mbfsanszero              }{\mathord}{mathematical sans-serif bold digit 0}%
+\UnicodeMathSymbol{"1D7ED}{\mbfsansone               }{\mathord}{mathematical sans-serif bold digit 1}%
+\UnicodeMathSymbol{"1D7EE}{\mbfsanstwo               }{\mathord}{mathematical sans-serif bold digit 2}%
+\UnicodeMathSymbol{"1D7EF}{\mbfsansthree             }{\mathord}{mathematical sans-serif bold digit 3}%
+\UnicodeMathSymbol{"1D7F0}{\mbfsansfour              }{\mathord}{mathematical sans-serif bold digit 4}%
+\UnicodeMathSymbol{"1D7F1}{\mbfsansfive              }{\mathord}{mathematical sans-serif bold digit 5}%
+\UnicodeMathSymbol{"1D7F2}{\mbfsanssix               }{\mathord}{mathematical sans-serif bold digit 6}%
+\UnicodeMathSymbol{"1D7F3}{\mbfsansseven             }{\mathord}{mathematical sans-serif bold digit 7}%
+\UnicodeMathSymbol{"1D7F4}{\mbfsanseight             }{\mathord}{mathematical sans-serif bold digit 8}%
+\UnicodeMathSymbol{"1D7F5}{\mbfsansnine              }{\mathord}{mathematical sans-serif bold digit 9}%
+\UnicodeMathSymbol{"1D7F6}{\mttzero                  }{\mathord}{mathematical monospace digit 0}%
+\UnicodeMathSymbol{"1D7F7}{\mttone                   }{\mathord}{mathematical monospace digit 1}%
+\UnicodeMathSymbol{"1D7F8}{\mtttwo                   }{\mathord}{mathematical monospace digit 2}%
+\UnicodeMathSymbol{"1D7F9}{\mttthree                 }{\mathord}{mathematical monospace digit 3}%
+\UnicodeMathSymbol{"1D7FA}{\mttfour                  }{\mathord}{mathematical monospace digit 4}%
+\UnicodeMathSymbol{"1D7FB}{\mttfive                  }{\mathord}{mathematical monospace digit 5}%
+\UnicodeMathSymbol{"1D7FC}{\mttsix                   }{\mathord}{mathematical monospace digit 6}%
+\UnicodeMathSymbol{"1D7FD}{\mttseven                 }{\mathord}{mathematical monospace digit 7}%
+\UnicodeMathSymbol{"1D7FE}{\mtteight                 }{\mathord}{mathematical monospace digit 8}%
+\UnicodeMathSymbol{"1D7FF}{\mttnine                  }{\mathord}{mathematical monospace digit 9}%
+\UnicodeMathSymbol{"1EEF0}{\arabicmaj                }{\mathop}{arabic mathematical operator meem with hah with tatweel}%
+\UnicodeMathSymbol{"1EEF1}{\arabichad                }{\mathop}{arabic mathematical operator hah with dal}%
+
+% /©
+%
+% ------------------------------------------------
+% The UNICODE-MATH package  <wspr.io/unicode-math>
+% ------------------------------------------------
+% This package is free software and may be redistributed and/or modified under
+% the conditions of the LaTeX Project Public License, version 1.3c or higher
+% (your choice): <http://www.latex-project.org/lppl/>.
+% ------------------------------------------------
+% Copyright 2006-2019  Will Robertson, LPPL "maintainer"
+% Copyright 2010-2017  Philipp Stephani
+% Copyright 2011-2017  Joseph Wright
+% Copyright 2012-2015  Khaled Hosny
+% ------------------------------------------------
+%
+% ©/
+
diff --git a/Master/texmf-dist/tex/optex/base/usebib.opm b/Master/texmf-dist/tex/optex/base/usebib.opm
new file mode 100644
index 00000000000..f37d21b3159
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/usebib.opm
@@ -0,0 +1,398 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \MakeReference {Reading bib databases <2021-03-12>} % loaded on demand by \usebib
+
+   \_doc -----------------------------
+   Loading the `librarian.tex` macro package. See `texdoc librarian`
+   for more information about it.
+
+   We want to ignore `\errmessage` and we want not to create `\jobname.lbr`
+   file.
+   \_cod -----------------------------
+
+\_def\errmessage#1{}
+\_def\newwrite#1{\_csname lb@restoreat\_endcsname \_endinput}
+\_def\_tmpb{\_catcode`\_=12 \_input librarian \_catcode`\_=11 }\_tmpb
+\_let\errmessage=\_errmessage
+\_let\newwrite=\_newwrite
+
+\_private \BibFile \ReadList \SortList \SortingOrder \NameCount \AbbreviateFirstname
+   \CreateField \RetrieveFieldInFor \RetrieveFieldIn ;
+
+   \_doc -----------------------------
+   The `\usebib` command.
+   \_cod -----------------------------
+
+\_def\_usebib/#1 (#2) #3 {%
+  \_let\_citeI=\_relax \_xdef\_citelist{\_citelist\_citelistB}%
+  \_global\_let\_addcitelist=\_writeXcite
+  \_ifx\_citelist\_empty
+     \_opwarning{No cited items. \_noexpand\usebib ignored}%
+  \_else
+     \_bgroup \_par
+        \_emergencystretch=.3\_hsize
+        \_ifx\_bibpart\_undefined \_def\_bibpart{none}\_fi
+        \_def\_optexbibstyle{#2}%
+        \_setctable\_optexcatcodes
+        \_ea \_skiptoendinput \_input languages.opm
+        \_input bib-#2.opm
+        \_the \_bibtexhook
+        \_ifcsname _mt:bib.and:\_cs{_lan:\_the\_language}\_endcsname \_else
+           \_opwarning{\_string\usebib: No phrases for language
+                       "\_cs{_lan:\_the\_language}" (using "en")}%
+           \_language=0 \_chardef\_documentlanguage=0
+        \_fi
+        \_def\_tmp##1[*]##2\_relax{\_def\_tmp{##2}}\_ea\_tmp\_citelist[*]\_relax
+        \_ifx\_tmp\_empty\_else % there was \nocite[*] used.
+           \_setbox0=\_vbox{\_hsize=\_maxdimen \_def\_citelist{}\_adef@{\_readbibentry}%
+           \_input #3.bib
+           \_ea}\_ea\_def\_ea\_citelist\_ea{\_citelist}%
+        \_fi
+        \_def\_citeI[##1]{\_csname lb@cite\_endcsname{##1}{\_bibpart}{}{}}\_citelist
+        \_BibFile{#3}%
+        \_if s#1\_SortList{\_bibpart}\_fi
+        \_ReadList{\_bibpart}%
+        \_restorectable
+     \_egroup
+  \_fi
+}
+\_long\_def\_skiptoendinput#1\_endinput{}
+\_def\_readbibentry#1#{\_readbibentryA}
+\_def\_readbibentryA#1{\_readbibentryB#1,,\_relax!.}
+\_def\_readbibentryB#1#2,#3\_relax!.{\_addto\_citelist{\_citeI[#1#2]}}
+
+   \_doc -----------------------------
+   Corrections in librarian macros.
+   \_cod -----------------------------
+
+\_tmpnum=\_catcode`\@  \_catcode`\@=11
+\_def\lb@checkmissingentries#1,{% we needn't \errmessage here, only \opmacwarning
+  \_def\lb@temp{#1}%
+  \_unless\_ifx\lb@temp\lb@eoe
+    \lb@ifcs{#1}{fields}%
+            {}%
+            {\_opwarning{\_string\usebib: entry [#1] isn't found in .bib}}%
+    \_ea\lb@checkmissingentries
+  \_fi
+}
+\_def\lb@readentry#1#2#3,{% space before key have to be ingnored
+  \_def\lb@temp{#2#3}%      we need case sensitive keys
+  \_def\lb@next{\_ea\lb@gotoat\lb@gobbletoeoe}%
+  \lb@ifcs\lb@temp{requested}%
+          {\_let\lb@entrykey\lb@temp
+           \lb@ifcs\lb@entrykey{fields}{}%
+                {\lb@defcs\lb@entrykey{fields}{}%
+                 \_lowercase{\lb@addfield{entrytype}{#1}}%
+                 \_let\lb@next\lb@analyzeentry}}{}%
+  \lb@next
+}
+\_let\lb@compareA=\lb@compare
+\_let\lb@preparesortA=\lb@preparesort
+\_def\lb@compare#1\lb@eoe#2\lb@eoe{% SpecialSort:
+  \_ifx\lb@sorttype\lb@namestring
+     \_ifx\_sortfield\_undefined \lb@compareA#1\lb@eoe#2\lb@eoe
+     \_else
+        \_ea\_RetrieveFieldInFor\_ea{\_sortfield}\lb@entrykey\lb@temp
+        \_ifx\lb@temp\_empty \_toks1={#1\lb@eoe}\_else \_toks1=\_ea{\lb@temp\lb@eoe}\_fi
+        \_ea\_RetrieveFieldInFor\_ea{\_sortfield}\lb@currententry\lb@temp
+        \_ifx\lb@temp\_empty \_toks2={#2\lb@eoe}\_else \_toks2=\_ea{\lb@temp\lb@eoe}\_fi
+        \_edef\lb@temp{\_noexpand\lb@compareA\_space\_the\_toks1 \_space\_the\_toks2}\lb@temp
+     \_fi
+  \_else \lb@compareA#1\lb@eoe#2\lb@eoe \_fi
+}
+\_def\lb@preparesort#1#2\lb@eoe{%
+  \_if#1-%
+    \_def\lb@sorttype{#2}%
+  \_else
+    \_def\lb@sorttype{#1#2}%
+  \_fi
+  \lb@preparesortA#1#2\lb@eoe
+}
+\_def\_SpecialSort#1{\_def\_sortfield{#1}}
+\_def\WriteImmediateInfo#1{}  % the existence of .lbr file bocks new reading of .bib
+\_catcode`\@=\_tmpnum
+
+   \_doc -----------------------------
+   Main action per each entry.
+   \_cod -----------------------------
+
+\_def\MakeReference{\_par \_bibskip
+  \_advance\_bibnum by1
+  \_isdefined{_bim:\_the\_bibnum}\_iftrue
+     \_edef\_tmpb{\_csname _bim:\_the\_bibnum\_endcsname}%
+     \_bibmark=\_ea{\_tmpb}%
+  \_else \_bibmark={}\_fi
+  \_edef\_tmpb{\EntryKey}%
+  \_noindent \_dest[cite:\_the\_bibnum]\_printlabel\EntryKey
+  \_printbib
+  {%
+     \_RetrieveFieldIn{entrytype}\_entrytype
+     \_csname _print:BEGIN\_endcsname
+     \_isdefined{_print:\_entrytype}\_iftrue
+        \_csname _print:\_entrytype\_endcsname
+     \_else
+        \_ifx\_entrytype\_empty \_else
+           \_opwarning{Entrytype @\_entrytype\_space from [\EntryKey] undefined}%
+           \_csname _print:misc\_endcsname
+     \_fi\_fi
+     \_csname _print:END\_endcsname
+     \_ifx\_wref\_wrefrelax\_else
+         \_immediate\_wref\_Xbib{{\EntryKey}{\_the\_bibnum}{\_the\_bibmark}}\_fi
+  }\_par
+}
+
+   \_doc -----------------------------
+   The \`\_bprinta`, \`\_bprintb`, \`\_bprintc`, \`\_bprintv`
+   commands used in the style files:
+   \_cod -----------------------------
+
+\_def\_bprinta {\_bprintb*}
+\_def\_bprintb #1[#2#3]{%
+   \_def\_bibfieldname{#2#3}%
+   \_if!#2\_relax
+      \_def\_bibfieldname{#3}%
+      \_RetrieveFieldIn{#3}\_bibfield
+      \_ifx\_bibfield\_empty\_else
+         \_RetrieveFieldIn{#3number}\_namecount
+         \_def\_bibfield{\_csname _Read#3\_ea\_endcsname \_csname _pp:#3\_endcsname}%
+      \_fi
+   \_else
+      \_RetrieveFieldIn{#2#3}\_bibfield
+   \_fi
+   \_if^#1^%
+      \_ifx\_bibfield\_empty \_ea\_ea\_ea \_doemptyfield
+      \_else \_ea\_ea\_ea \_dofullfield \_fi
+   \_else \_ea \_bprintaA
+   \_fi
+}
+\_def\_dofullfield#1#2{\_def\_dofield##1{#1}\_ea\_dofield\_ea{\_bibfield}}
+\_def\_doemptyfield#1#2{\_def\_dofield##1{#2}\_ea\_dofield\_ea{\_bibfield}}
+\_let\_Readauthor=\ReadAuthor  \_let\_Readeditor=\ReadEditor
+\_def\_bprintaA #1#2{\_ifx\_bibfield\_empty #2\_else\_bprintaB #1**\_eee\_fi}
+\_def\_bprintaB #1*#2*#3\_eee{\_if^#3^#1\_else\_ea\_bprintaC\_ea{\_bibfield}{#1}{#2}\_fi}
+\_def\_bprintaC #1#2#3{#2#1#3}
+\_def\_bprintc#1#2{\_bprintcA#1#2**\_relax}
+\_def\_bprintcA#1#2*#3*#4\_relax{\_ifx#1\_empty \_else \_if^#4^#2\_else#2#1#3\_fi\_fi}
+\_def\_bprintv [#1]#2#3{\_def\_tmpa{#2}\_def\_tmpb{#3}\_bprintvA #1,,}
+\_def\_bprintvA #1,{%
+   \_if^#1^\_tmpb\_else
+      \_RetrieveFieldIn{#1}\_tmp
+      \_ifx \_tmp\_empty
+      \_else \_tmpa \_def\_tmpb{}\_def\_tmpa{}%
+      \_fi
+   \_ea \_bprintvA
+   \_fi
+}
+\_sdef{_pp:author}{\_letNames\_authorname}
+\_sdef{_pp:editor}{\_letNames\_editorname}
+\_def\_letNames{\_let\_Firstname=\Firstname \_let\_Lastname=\Lastname
+   \_let\_Von=\Von \_let\_Junior=\Junior
+}
+
+   \_doc -----------------------------
+   Various macros + multilingual. Note that \`\_nobibwarnlist` is used in
+   \`\_bibwarning` and it is set by \^`\nobibwarning` macro.
+   \_cod -----------------------------
+
+\_def\_bibwarning{%
+   \_ea\_isinlist \_ea\_nobibwarnlist\_ea{\_ea,\EntryKey,}\_iffalse
+       \_opwarning{Missing field "\_bibfieldname" in [\EntryKey]}\_fi}
+
+\_endcode
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+The file `usebib.opm` implements the command
+\~`\usebib/<sorttype> (<style>) <bibfiles>`
+where `<sorttype>` is one letter `c` (references ordered by citation order in
+the text) or `s` (references ordered by key in the style file),
+`<style>` is the part of the name `bib-<style>.opm` of the style file
+and `<bibfiles>` are one or more `.bib` file names without suffix separated by
+comma without space. Example:
+
+\begtt
+\usebib/s (simple) mybase,yourbase
+\endtt
+
+This command reads the `<bibfiles>` directly and creates the list of
+bibliographic references (only those declared by \~`\cite[]` or
+\~`\nocite[]` in the text). The formatting of such references is defined in the style
+file.
+
+The principle \"first entry wins" is used. Suppose `\usebib/s (simple) local,global`.
+If an entry with the same label is declared in `local.bib` and in
+`global.bib` too then the first wins. So, you can set exceptions in your
+`local.bib` file for your document.
+
+The `bib-<style>.opm` declares entry types (like `@BOOK`, `@ARTICLE`) and declares
+their mandatory and optional fields (like `author`, `title`). When
+a mandatory field is missing in an entry in the `.bib` file then a warning is printed on the
+terminal about it. You can suppress such warnings by command
+\^`\nobibwarning`~`[<bib-labels>]`, where <bib-labels> is a comma-separated list
+of labels (without spaces) where missing mandatory fields will be no warned.
+
+Old `.bib` files may use the obscure notation for accents like `{\"o}`.
+Recommendation: convert such old files to Unicode encoding. If you are
+unable to do this then you can set \^`\bibtexhook={`\^`\oldaccents}`.
+
+\secc Notes for bib-style writers
+
+The `.bib` files include records in the format:
+
+\begtt \catcode`\<=13
+@<entry-type>{<label>,
+   <field-name> = "<field-data>",
+   <field-name> = "<field-data>",
+   ...etc
+}
+\endtt
+%
+see the file `demo/op-biblist.bib` for a real example. The <entry-types> and
+<field-names> are case insensitive.
+
+Ancient Bib\TeX/ has read such files and has generated files appropriate for
+reading by \LaTeX. It has worked with a set of <entry-types>, see the www
+page \url{http://en.wikipedia.org/wiki/BibTeX}. The set of entry types
+listed on this www page is de facto the Bib\TeX/ standard. The \OpTeX/ bib
+style writer must \"declare" all such entry types and more non-standard
+entry types can be declared too if there is a good reason for doing it. The
+word \"declare" used in the previous sentence means that a bib-style writer must
+define the printing rules for each <entry-type>.
+The printing rules for <entry-type> include: which fields will be printed, in
+what order, by what format they will be printed on (italic, caps, etc.),
+which fields are mandatory, which are optional, and which are ignored in
+`.bib` records.
+
+The style writer can be inspired by two styles already done: `bib-simple.opm`
+and `bib-iso690.opm`. The second one is documented in detail in
+section~\ref[isobib].
+
+The printing rules for each <entry-type> must be declared by
+`\_sdef{_print:<entry-type>}` in `bib-<style>.opm` file.
+The `<entry-type>` has to be lowercase here. \OpTeX/ supports following
+macros for a more comfortable setting of printing rules:
+
+\begitems
+* \^`\_bprinta` `[<field-name>]  {<if defined>} {<if not defined>}`. The part <if defined>
+    is executed if <field-name> is declared in .bib file for the entry which is
+    currently processed. Else the part <if not defined> is processed.
+    The part <if defined> can include the `*` parameter which is replaced
+    by the value of the <field-name>.
+*   The part <if not defined> can include
+    the \^`\_bibwarning` command if the <field-name> is mandatory.
+* \^`\_bprintb` `[<field-name>]  {<if defined>} {<if not defined>}`. The same as
+    `\_bprinta`, but the `##1` parameter is used instead `*`. Differences: `##1`
+    parameter can be used more than once and can be enclosed in nested
+    braces. The `*` parameter can be used at most once and cannot be enclosed
+    in braces. Warning: if the `\_bprintb` commands are nested (`\_bprintb` in
+    `\_bprintb`), then you need to write the `####1` parameter for internal `\_bprintb`.
+    But if `\_bprinta` commands are nested then the parameter is not duplicated.
+* \^`\_bprintc` `\macro {<if non-empty>}`. The <if non-empty> part is executed if
+    `\macro` is non-empty. The `*` parameter can be used, it is replaced by
+    the `\macro`.
+* \^`\_bprintv` `[<field1>,<field2>,...] {<if defined>} {<if not defined>}`.
+    The part <if defined> is executed if <field1> or <filed2> or ...
+    is defined, else the second part <if not defined> is executed.
+    There is one filed name or the list field names separated by commas.
+    The parts cannot include any parameters.
+\enditems
+
+There are two special field-names: `!author` and `!editor`. The processed list of
+authors or editors are printed here instead of raw data, see the commands
+\~`\_authorname` and \~`\_editorname` below.
+
+The bib-style writer can define `_print:BEGIN` and/or `_print:END`.
+They are executed at the beginning or
+end of each `<entry-type>`. The formatting does not solve the numbering and
+paragraph indentation of the entry. This is processed by \^`\_printbib` macro
+used in \OpTeX/ (and may be redefined by the author or document designer).
+
+The \^`\bibmark={something}` can be declared, for instance in the `_print:END` macro.
+Such \"bibmark" is saved to the `.ref` file and used in next \TeX/ run as
+`\cite` marks when `\nonumcitations` is set.
+
+Moreover, the bib-style writer must declare the format of
+special fields `author` and `editor`. These fields include a
+list of names, each name is precessed individually in a loop. The
+\^`\_authorname` or \^`\_editorname` is called for each name on the list.
+The bib-style writer must define
+the \`\_authorname` and \`\_editorname` commands
+in order to declare the format of printing each individual name.
+The following control sequences can be used in these macros:
+
+\begitems
+* `\_NameCount`: the number of the currently processed author in the list
+* `\_namecont`: the total number of the authors in the list
+* `\_Lastname`, `\_Firstname`, `\_Von`, `\_Junior`: the parts of the name.
+\enditems
+
+The whole style file is read in the group during the `\usebib` command is executed
+before typesetting the reference list. Each definition or setting is local
+here.
+
+The auto-generated phrases (dependent on current language) can be used in
+bib-style files by `\_mtext{bib.<identifier>}`, where <ident> is an identifier of
+the phrase and the phrase itself is defined by
+`\_sdef{_mt:bib.<identifier>:<language>}{<phrase>}`. See section~\ref[langphrases]
+for more detail. Phrases for <identifiers>:
+and, etal, edition, citedate, volume, number, prepages, postpages, editor,
+editors, available, availablealso, bachthesis, masthesis, phdthesis
+are defined already, see the end of section~\ref[langphrases].
+
+If you are using non-standard field-names in .bib database and bib-style,
+you have to declare them by `\_CreateField {<fieldname>}`.
+
+You can declare `\_SortingOrder` in the manner documented by librarian package.
+
+User or author of the bib-style can create the hidden field which has a
+precedence while sorting names. Example:
+
+\begtt
+\CreateField {sortedby}
+\SpecialSort {sortedby}
+\endtt
+Suppose that the .bib file includes:
+\begtt
+...
+author   = "Jan Chadima",
+sortedby = "Hzzadima Jan",
+...
+\endtt
+Now, this author is sorted between H and I, because the Ch digraph in this
+name has to be sorted by this rule.
+
+If you need (for example) to place the auto-citations before other citations,
+then you can mark your entries in `.bib` file by `sortedby = "@"`, because this
+character is sorted before `A`.
+
+\_endinput
+
+History:
+--------
+
+2021-03-12  \_citelistB added before first test.
+2021-02-15  \_expandafter -> \_ea
+Apr. 2014:  released in OPmac
+Jan. 2016:  "first entry wins" implemented
+Apr. 2016:  \readentry -> \readbibentry, \usebib->\MakeReference
+Feb. 2018:  \input librarian does not create \jobname.lbr
+
+% Source:
+
+% opmac-bib
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Petr Olsak, version Feb. 2018 (beta)
+
+% This is module for OPmac macros, see http://petr.olsak.net/opmac.html
+% The command:
+%    \usebib/<sorttype> (<style>) (bibfiles>
+% for direct reading .bib files by OPmac macros (without bibTeX) is implemented here.
+% The implementation depends on librarian.tex package by Paul Isambert.
+% Use:
+%    \input opmac  \input opmac-bib
+% or simply:
+%    \input opmac-bib
+% before using the command \usebib.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% end
+
diff --git a/Master/texmf-dist/tex/optex/base/verbatim.opm b/Master/texmf-dist/tex/optex/base/verbatim.opm
new file mode 100644
index 00000000000..8fd20ee5317
--- /dev/null
+++ b/Master/texmf-dist/tex/optex/base/verbatim.opm
@@ -0,0 +1,372 @@
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
+
+\_codedecl \begtt {Verbatim <2021-01-22>} % preloaded in format
+
+   \_doc ----------------------------
+   The internal parameters
+   \`\_ttskip`, \`\_ttpenalty`, \`\_viline`, \`\_vifile` and \`\_ttfont`
+   for verbatim macros are set.
+   \_cod ----------------------------
+
+\_def\_ttskip{\_medskip}           % space above and below \begtt, \verbinput
+\_mathchardef\_ttpenalty=100       % penalty between lines in \begtt, \verbinput
+\_newcount\_viline                 % last line number in \verbinput
+\_newread\_vifile                  % file given by \verinput
+\_def\_ttfont{\_tt}                % default tt font
+
+   \_doc ----------------------------
+   \`\code``{<text>}` expands to `\detokenize{<text>}` when `\escapechar=-1`. In
+   order to do it more robust when it is used in `\write` then it expands as
+   noexpanded `\code<space>` (followed by space in its csname). This macro
+   does the real work.
+
+   The \`\_printinverbatim``{<text>}` macro is used for `\code{<text>}` printing and for
+   \code{`}<text>\code{`} printing. It is defined as `\hbox`, so the in-verbatim <text>
+   will be never broken. But you can re-define this macro.
+
+   When `\code` occurs in PDF outlines then it does the same as `\detokenize`.
+   The macro for preparing outlines sets `\escapechar` to $-1$ and uses
+   \^`\_regoul` token list before `\edef`.
+
+   The `\code` is not `\proteced` because we want it expands to
+   `\unexpanded{\code<space>{<text>}}` in `\write` parameters. This protect the
+   expansions of the `\code` parameter (like `\\`, `\^` etc.).
+   \_cod ----------------------------
+
+\_def\_code#1{\_unexpanded\_ea{\_csname _code \_endcsname{#1}}}
+\_protected\_sdef{_code }#1{{\_escapechar=-1 \_ttfont \_the\_everyintt \_relax
+   \_ea\_printinverbatim\_ea{\_detokenize{#1}}}}
+\_def\_printinverbatim#1{\_leavevmode\_hbox{#1}}
+
+\_regmacro {}{}{\_let\code=\_detokenize \_let\_code=\_detokenize}
+\_public \code ;
+
+   \_doc ----------------------------
+   The \`\_setverb` macro sets all catcodes to \"verbatim mode". It should be used only
+   in a group, so we prepare a new catcode table with \"verbatim" catcodes and we define
+   it as\nl `\_catcodetable`\`\_verbatimcatcodes`. After the group is finished then
+   original catcode table is restored.
+   \_cod ----------------------------
+
+\_newcatcodetable \_verbatimcatcodes
+\_def\_setverb{\_begingroup
+   \_def\do##1{\_catcode`##1=12 }
+   \_dospecials
+   \_savecatcodetable\_verbatimcatcodes % all characters are normal
+   \_endgroup
+}
+\_setverb
+\_def\_setverb{\_catcodetable\_verbatimcatcodes }%
+
+   \_doc ----------------------------
+   \`\verbchar``<char>` saves original catcode of previously declared `<char>` (if
+   such character was declared) using \`\_savedttchar` and \`\_savedttcharc`
+   values. Then new such values are stored. The declared character is activated
+   by `\_adef` as a macro (active character) which opens a group,
+   does `\_setverb` and other settings and reads its parameter until second the same
+   character. This is done by the \`\_readverb` macro. Finally, it prints scanned
+   `<text>` by \^`\_printinverbatim` and closes group. Suppose that `\verbchar"` is
+   used. Then the following work is schematically done:
+   \begtt
+   \_def "{\_begingroup \_setverb ... \_readverb}
+   \_def \_readverb #1"{\_printinverbatim{#1}\_endgroup}
+   \endtt
+   Note that the second occurrence of `"` is not active because `\_setverb`
+   deactivates it.
+   \_cod ----------------------------
+
+\_def\_verbchar#1{%
+   \_ifx\_savedttchar\_undefined\_else \_catcode\_savedttchar=\_savedttcharc \_fi
+   \_chardef\_savedttchar=`#1
+   \_chardef\_savedttcharc=\_catcode`#1
+   \_adef{#1}{\_begingroup \_setverb \_adef{ }{\_dsp}\_ttfont \_the\_everyintt\_relax \_readverb}%
+   \_def\_readverb ##1#1{\_printinverbatim{##1}\_endgroup}%
+}
+\_let \_activettchar=\_verbchar % for backward compatibility
+\_public \verbchar \activettchar ;
+
+   \_doc ----------------------------
+   \`\begtt` is defined only as public. We don't need a private `\_begtt` variant.
+   This macro opens a group and sets `%` as an active character (temporary).
+   This will allow it to be used as the comment character at the same line after
+   `\begtt`. Then \`\_begtti` is run. It is defined by \^`\eoldef`,
+   so users can put a parameter at the
+   same line where `\begtt` is. This `#1` parameter is used after \^`\everytt`
+   parameters settings, so users can change them locally.
+
+   The \^`\_begtti` macro does \^`\_setverb` and another preprocessing, sets
+   `\endlinechar` to `^^J` and reads the following text in verbatim mode
+   until \`\endtt` occurs. This scanning is done by \`\_startverb` macro which is
+   defined as:
+   \begtt \adef/{\bslash}
+   \_def\_startverb #1/endtt #2^^J{...}
+   \endtt
+   We must to ensure that the backslash in `\endtt` has category 12 (this is a
+   reason of the `\ea` chain in real code).
+   The `#2` is something between `\endtt` and the end of the same line and it is simply
+   ignored.
+
+   The `\_startverb` puts the scanned data to \`\_prepareverbdata`. It sets the data
+   to `\_tmpb` without changes by default, but you should re-define it in order
+   to do special changes if you want. (For example, \^`\hisyntax` redefines
+   this macro.) The scanned data have `^^J` at each end of line and all spaces are
+   active characters (defined as {\visiblesp`\ `}).
+   Other characters have normal category 11 or 12.
+
+   When `\_prepareverbdata` finishes then `\_startverb` runs `\_printverb` loop
+   over each line of the data and does a final work: last skip plus `\noindent`
+   in the next paragraph.
+   \_cod ---------------------------
+
+\_def\begtt{\_par \_begingroup \_adef\%##1\_relax{\_relax}\_begtti}
+\_eoldef \_begtti#1{\_wipeepar \_setxhsize
+   \_vskip\_parskip \_ttskip
+   \_setverb
+   \_ifnum\_ttline<0 \_let\_printverblinenum=\_relax \_else \_initverblinenum \_fi
+   \_adef{ }{\_dsp}\_adef\^^I{\t}\_parindent=\_ttindent \_parskip=0pt
+   \_def\t{\_hskip \_dimexpr\_tabspaces em/2\_relax}%
+   \_the\_everytt \_relax #1\_relax \_ttfont
+   \_def\_testcommentchars##1\_iftrue{\_iffalse}\_let\_hicomments=\_relax
+   \_endlinechar=`^^J
+   \_startverb
+}
+\_ea\_def\_ea\_startverb \_ea#\_ea1\_csstring\\endtt#2^^J{%
+   \_prepareverbdata\_tmpb{#1^^J}%
+   \_ea\_printverb \_tmpb\_end
+   \_par
+   \_endgroup \_ttskip
+   \_isnextchar\_par{}{\_noindent}%
+}
+\_def\_prepareverbdata#1#2{\_def#1{#2}}
+
+   \_doc
+   The \`\_printverb` macro calls \^`\_printverbline``{<line>}` repeatedly
+   to each scanned line of verbatim text. The `\_printverb` is used from
+   `\begtt...\endtt` and from `\verbinput` too.
+
+   The \^`\_testcommentchars` replaces the following `\_iftrue` to
+   `\_iffalse` by default unless the \~`\commentchars` are set. So, the main body
+   of the loop is written in the `\_else` part of the `\_iftrue` condition.
+   The \^`\_printverbline``{<line>}` is called here.
+
+   The \`\_printverbline``{<line>}` expects that it starts in vertical mode and it must
+   do `\par` to return the vertical mode. The \`\_printverblinenum`
+   is used here: it does nothing when `\_ttline`\code{<0} else it prints the line
+   number using `\_llap`.
+
+   \`\_putttpenalty` puts \^`\_ttpenalty` before second and next lines, but
+   not before first line in each `\begtt...\endtt` environment.
+   \_cod ----------------------------
+
+\_def\_printverb #1^^J#2{%
+   \_ifx\_printverblinenum\_relax \_else \_incr\_ttline \_fi
+   \_testcommentchars #1\_relax\_relax\_relax
+   \_iftrue
+      \_ifx\_end#2 \_printcomments\_fi
+   \_else
+      \_ifx\_vcomments\_empty\_else  \_printcomments \_def\_vcomments{}\_fi
+      \_ifx\_end#2
+         \_bgroup \_adef{ }{}\_def\t{}% if the last line is emtpy, we don't print it
+         \_ifcat&#1&\_egroup \_else\_egroup \_printverbline{#1}\_fi
+      \_else
+         \_printverbline{#1}%
+      \_fi
+   \_fi
+   \_ifx\_end#2 \_let\_next=\_relax \_else \_def\_next{\_printverb#2}\_fi
+   \_next
+}
+\_def\_printverbline#1{\_putttpenalty \_indent \_printverblinenum \_kern\_ttshift #1\par}
+\_def\_initverblinenum{\_tenrm \_thefontscale[700]\_ea\_let\_ea\_sevenrm\_the\_font}
+\_def\_printverblinenum{\_llap{\_sevenrm \_the\_ttline\_kern.9em}}
+\_def\_putttpenalty{\_def\_putttpenalty{\_penalty\_ttpenalty}}
+
+   \_doc ----------------------------
+   Macro \`\verbinput` uses a file read previously or opens the given file. Then
+   it runs the parameter scanning by \`\_viscanparameter` and \`\_viscanminus`.
+   Finally the \`\_doverbinput` is run. At the beginning of `\_doverbinput`, we have
+   `\_viline`= number of lines already read using previous `\verbinput`,
+   `\_vinolines`= the number of lines we need to skip and `\_vidolnes`= the
+   number of lines we need to print.
+   A similar preparation is done as in `\begtt` after the group is opened. Then
+   we skip \`\_vinolines` lines in a loop a and we read \`\_vidolines` lines. The
+   read data is accumulated into `\_tmpb` macro. The next steps are equal to
+   the steps done in \^`\_startverb` macro: data are processed via
+   \^`\_prepareverbdata` and printed via \^`\_printverb` loop.
+   \_cod \_fin ----------------------
+
+\_def\_verbinput #1(#2) #3 {\_par \_def\_tmpa{#3}%
+   \_def\_tmpb{#1}%  cmds used in local group
+   \_ifx\_vifilename\_tmpa \_else
+      \_openin\_vifile={#3}%
+      \_global\_viline=0 \_global\_let\_vifilename=\_tmpa
+      \_ifeof\_vifile
+         \_opwarning{\_string\verbinput: file "#3" unable to read}
+         \_ea\_ea\_ea\_skiptorelax
+      \_fi
+   \_fi
+   \_viscanparameter #2+\_relax
+}
+\_def\_skiptorelax#1\_relax{}
+
+\_def \_viscanparameter #1+#2\_relax{%
+   \_if$#2$\_viscanminus(#1)\_else \_viscanplus(#1+#2)\_fi
+}
+\_def\_viscanplus(#1+#2+){%
+   \_if$#1$\_tmpnum=\_viline
+   \_else \_ifnum#1<0 \_tmpnum=\_viline \_advance\_tmpnum by-#1
+       \_else \_tmpnum=#1
+             \_advance\_tmpnum by-1
+             \_ifnum\_tmpnum<0 \_tmpnum=0 \_fi % (0+13) = (1+13)
+   \_fi \_fi
+   \_edef\_vinolines{\_the\_tmpnum}%
+   \_if$#2$\_def\_vidolines{0}\_else\_edef\_vidolines{#2}\_fi
+   \_doverbinput
+}
+\_def\_viscanminus(#1-#2){%
+   \_if$#1$\_tmpnum=0
+      \_else \_tmpnum=#1 \_advance\_tmpnum by-1 \_fi
+   \_ifnum\_tmpnum<0 \_tmpnum=0 \_fi  % (0-13) = (1-13)
+   \_edef\_vinolines{\_the\_tmpnum}%
+   \_if$#2$\_tmpnum=0
+      \_else \_tmpnum=#2 \_advance\_tmpnum by-\_vinolines \_fi
+   \_edef\_vidolines{\_the\_tmpnum}%
+   \_doverbinput
+}
+\_def\_doverbinput{%
+   \_tmpnum=\_vinolines
+   \_advance\_tmpnum by-\_viline
+   \_ifnum\_tmpnum<0
+      \_openin\_vifile={\_vifilename}%
+      \_global\_viline=0
+   \_else
+      \_edef\_vinolines{\_the\_tmpnum}%
+   \_fi
+   \_vskip\_parskip \_ttskip \_wipeepar \_setxhsize
+   \_begingroup
+   \_ifnum\_ttline<-1 \_let\_printverblinenum=\_relax \_else \_initverblinenum \_fi
+   \_setverb \_adef{ }{\_dsp}\_adef\^^I{\t}\_parindent=\_ttindent \_parskip=0pt
+   \_def\t{\_hskip \_dimexpr\_tabspaces em/2\_relax}%
+   \_the\_everytt\_relax \_tmpb\_relax \_ttfont
+   \_endlinechar=`^^J \_tmpnum=0
+   \_loop \_ifeof\_vifile \_tmpnum=\_vinolines\_space \_fi
+         \_ifnum\_tmpnum<\_vinolines\_space
+         \_vireadline \_advance\_tmpnum by1 \_repeat      %% skip lines
+   \_edef\_ttlinesave{\_ttline=\_the\_ttline}%
+   \_ifnum\_ttline=-1 \_ttline=\_viline \_fi
+   \_tmpnum=0 \_def\_tmpb{}%
+   \_ifnum\_vidolines=0 \_tmpnum=-1 \_fi
+   \_ifeof\_vifile \_tmpnum=\_vidolines\_space \_fi
+   \_loop \_ifnum\_tmpnum<\_vidolines\_space
+            \_vireadline
+            \_ifnum\_vidolines=0 \_else\_advance\_tmpnum by1 \_fi
+            \_ifeof\_vifile \_tmpnum=\_vidolines\_space \_else \_visaveline \_fi %% save line
+            \_repeat
+   \_ea\_prepareverbdata \_ea \_tmpb\_ea{\_tmpb^^J}%
+   \_catcode`\ =10 \_catcode`\%=9 % used in \commentchars comments
+   \_ea\_printverb \_tmpb\_end
+   \_global\_ttlinesave
+   \_par
+   \_endgroup
+   \_ttskip
+   \_isnextchar\_par{}{\_noindent}%
+}
+\_def\_vireadline{\_read\_vifile to \_tmp \_incr\_viline }
+\_def\_visaveline{\_ea\_addto\_ea\_tmpb\_ea{\_tmp}}
+
+\_public \verbinput ;
+
+   \_doc -----------------------------
+   If the language of your code\label[commentchars]\wlabel{}
+   printed by \^`\verbinput` supports the
+   format of comments started by two characters from the beginning of the
+   line then you can set these characters by \^`\commentchars``<first><second>`.
+   Such comments are printed in the non-verbatim mode without these two
+   characters and they look like the verbatim printing is interrupted
+   at the places where such comments are.
+   See the section~\ref[lua] for good illustration.
+   The file `optex.lua` is read by a single command
+   `\verbinput (4-) optex.lua` here and the `\commentchars --` was set before it.
+
+   If you need to set a special character by \^`\commentchars` then you must
+   to set the catcode to 12 (and space to 13). Examples:
+   \begtt
+   \commentchars //        % C++ comments
+   \commentchars --        % Lua comments
+   {\catcode`\%=12 \_ea}\commentchars %%                  % TeX comments
+   {\catcode`\#=12 \catcode`\ =13 \_ea}\commentchars#{ }  % bash comments
+   \endtt
+
+   There is one limitation when \TeX/ interprets the comments declared by
+   \^`\commentchars`. Each block of comments is accumulated to one line
+   and then it is re-interpreted by \TeX. So, the ends of lines in the
+   comments block are lost. You cannot use macros which
+   need to scan end of lines, for example `\begtt...\endtt` inside the comments
+   block does not work. The character `%` is ignored in comments but you can use `\%`
+   for printing or `%` alone for de-activating `\_endpar` from empty
+   comment lines.
+
+   Implementation: The \`\commentchars``<first><second>` redefines the \`\_testcommentchars`
+   used in \^`\_printverb` in order to it removes the following `\_iftrue`
+   and returns `\_iftrue` or `\_iffalse` depending on the fact that
+   the comment characters are or aren't present at the beginning of tested line.
+   If it is true (`\ifnum` expands to `\ifnum 10>0`) then the rest of the
+   line is added to the \`\_vcomments` macro.
+
+   The \`\_hicomments` is `\relax` by default but it is redefined by \^`\commentchars`
+   in order to keep no-colorized comments if we need to use feature from
+   \^`\commentchars`.
+
+   The accumulated comments are printed whenever the non-comment line
+   occurs. This is done by \`\_printcomments` macro.
+   You can re-define it, but the main idea must be kept: it is printed in the
+   group, `\_reloding \_rm` initializes normal font, `\catcodetable0`
+   returns to normal catcode table used before `\verbinput` is started, and
+   the text accumulated in `\_vcomments` must be printed by
+   `\_scantextokens` primitive.
+   \_cod -----------------------------
+
+\_def\_vcomments{}
+\_let\_hicomments=\_relax
+
+\_def\_commentchars#1#2{%
+   \_def\_testcommentchars ##1##2##3\_relax ##4\_iftrue{\_ifnum % not closed in this macro
+      \_ifx #1##1\_ifx#2##21\_fi\_fi 0>0
+      \_ifx\_relax##3\_relax \_addto\_vcomments{\_endgraf}% empty comment=\enfgraf
+      \_else \_addto\_vcomments{##3 }\_fi}%
+   \_def\_hicomments{\_replfromto{\b\n#1#2}{^^J}{\w{#1#2####1}^^J}}% used in \hisyntax
+}
+\_def\_testcommentchars #1\_iftrue{\_iffalse} % default value of \_testcommentchar
+\_def\_printcomments{\_ttskip
+   {\_catcodetable0 \_reloading \_rm \_everypar={}%
+    \_noindent \_ignorespaces \_scantextokens\_ea{\_vcomments}\_par}%
+   \_ttskip
+}
+\_public \commentchars ;
+
+   \_doc -----------------------------
+   The \`\visiblesp` sets spaces as visible characters \char9251.
+   It redefines the \^`\_dsp`, so it is useful for verbatim modes only.
+
+   The \`\_dsp` is equivalent to {\visiblesp`\ `} primitive.
+   It is used in all verbatim environments: spaces are active and defined as
+   `\_dsp` here.
+   \_cod -----------------------------
+
+\_def \_visiblesp{\_ifx\_initunifonts\_relax \_def\_dsp{\_char9251 }%
+                  \_else \_def\_dsp{\_char32 }\_fi}
+\_let\_dsp=\  % primitive "direct space"
+
+\_public \visiblesp ;
+
+\_endcode
+
+\_endinput
+
+History:
+2020-01-22 ... \activettchar changed to \verbchar
+2020-12-30 ... \secc followed by \begtt must be unbreakable
+2020-11-13 ... \commentchars implemented
+2020-04-22 ... \ttshift introduced
+2020-04-06 ... \visiblesp added
+2020-04-04 ... ^^I activated as \t for multiline verbatim
+               \verbinput <cmds> (...) <filename>, <cmds> added.