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+% \iffalse meta-comment
+%
+% Copyright 1993-2018
+% The LaTeX3 Project and any individual authors listed elsewhere
+% in this file.
+%
+% This file is part of the LaTeX base system.
+% -------------------------------------------
+%
+% It may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3c
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+%    https://www.latex-project.org/lppl.txt
+% and version 1.3c or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This file has the LPPL maintenance status "maintained".
+%
+% The list of all files belonging to the LaTeX base distribution is
+% given in the file `manifest.txt'. See also `legal.txt' for additional
+% information.
+%
+% The list of derived (unpacked) files belonging to the distribution
+% and covered by LPPL is defined by the unpacking scripts (with
+% extension .ins) which are part of the distribution.
+%
+% \fi
+%
+% \iffalse
+%<*driver>
+\documentclass{ltxdoc}
+\usepackage[latin1,utf8]{inputenc}% force utf8 to be re-loaded, to get version info
+\GetFileInfo{utf8.def}
+\title{Providing some UTF-8 support via \texttt{inputenc}}
+\date{\fileversion\space\filedate{} printed \today}
+ \author{%
+  David Carlisle \and Frank Mittelbach \and
+  Chris Rowley\thanks{Borrowing heavily from tables by Sebastian Rahtz; some table
+      and code cleanup by Javier Bezos}}
+\begin{document}
+ \MaintainedByLaTeXTeam{latex}
+ \maketitle
+ \tableofcontents
+ \DocInput{utf8ienc.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+%
+% \newpage
+%
+% \section{Introduction}
+%
+%
+% \subsection{Background and general stuff}
+%
+% For many reasons what this package provides is a long way from any
+% type of `Unicode compliance'.
+%
+% In stark contrast to 8-bit character sets, with 16 or more bits it can
+% easily be very inefficient to support the full range.\footnote{In
+% fact, \LaTeX's current 8-bit support does not go so far as to make
+% all 8-bit characters into valid input.}  Moreover, useful support of
+% character input by a typesetting system overwhelmingly means finding
+% an acceptable visual representation of a sequence of characters and
+% this, for \LaTeX{}, means having available a suitably encoded 8-bit
+% font.
+%
+% Unfortunately it is not possible to predict exactly what valid UTF-8
+% octet sequences will appear in a particular file so it is best to
+% make all the unsupported but valid sequences produce a reasonably
+% clear and noticeable error message.
+%
+% There are two directions from which to approach the question of what
+% to load.  One is to specify the ranges of Unicode characters that will
+% result in some sensible typesetting; this requires the provider to
+% ensure that suitable fonts are loaded and that these input characters
+% generate the correct typesetting via the encodings of those fonts.  The
+% other is to inspect the font encodings to be used and use these to
+% define which input Unicode characters should be supported.
+%
+% For Western European languages, at least, going in either direction
+% leads to many straightforward decisions and a few that are more
+% subjective.  In both cases some of the specifications are \TeX{}
+% specific whilst most are independent of the particular typesetting
+% software in use.
+%
+% As we have argued elsewhere, \LaTeX{} needs to refer to characters via
+% `seven-bit-text' names and, so far, these have been chosen by
+% reference to historical sources such as Plain \TeX{} or Adobe encoding
+% descriptions.  It is unclear whether this ad hoc naming structure should
+% simply be extended or whether it would be useful to
+% supplement it with standardised internal Unicode character names such as
+% one or more of the following:\footnote{Burkhard und Holger Mittelbach
+%   spielen mit mir!  Sie haben etwas hier geschrieben.}
+%
+% \begin{verbatim}
+%   \ltxutwochar <4 hex digits>
+%
+%   \ltxuchar {<hex digits>}
+%     B H U R R R
+%
+%   \ltxueightchartwo   <2 utf8 octets as 8-bit char tokens>
+%   \ltxueightcharthree <3 utf8 octets ...>
+%   \ltxueightcharfour  <4 utf8 octets ...>
+% \end{verbatim}
+%
+%
+% \subsection{More specific stuff}
+%
+% In addition to setting up the mechanism for reading UTF-8 characters
+% and specifying the \LaTeX-level support available, this package
+% contains support for some default historically expected \TeX-related
+% characters and some example `Unicode definition files' for standard
+% font encodings.
+%
+%
+% \subsection{Notes}
+%
+% This package does not support Unicode combining characters as \TeX{}
+% is not really equipped to make this possible.
+%
+%  No attempt is made to be useful beyond Latin, and maybe Cyrillic,
+%  for European languages (as of now).
+%
+%
+% \subsection{Basic operation of the code}
+%
+% The \texttt{inputenc} package makes the upper 8-bit characters active and
+%    assigns to all of them an error message. It then waits for the
+%    input encoding files to change this set-up.  Similarly, whenever
+%    |\inputencoding| is encountered in a document, first the upper
+%    8-bit characters are set back to produce an error and then the
+%    definitions for the new input encoding are loaded, changing some of the
+%    previous settings.
+%
+%    The 8-bit input encodings currently supported by \texttt{inputenc}
+%    all use declarations such as |\DeclareInputText| and the like to map an
+%    8-bit number to some \LaTeX{} internal form, e.g.~to |\"a|.
+%
+%    The situation when supporting UTF-8 as the input encoding is
+%    different, however. Here we only have to set up the actions of
+%    those 8-bit numbers that can be the first octet in a UTF-8
+%    representation of a Unicode character.  But we cannot simply set
+%    this to some internal \LaTeX{} form since the Unicode character
+%    consists of more than one octet; instead we have to define this
+%    starting octet to parse the right number of further octets that
+%    together form the UTF-8 representation of some Unicode character.
+%
+%    Therefore when switching to \texttt{utf8} within the
+%    \texttt{inputenc} framework the characters with numbers (hex)
+%    from \texttt{"C2} to \texttt{"DF} are defined to parse for a
+%    second octet following, the characters from \texttt{"E0} to
+%    \texttt{"EF} are defined to parse for two more octets and finally
+%    the characters from \texttt{"F0} to \texttt{"F3} are defined to
+%    parse for three additional octets.  These additional octets are
+%    always in the range \texttt{"80} to \texttt{"B9}.
+%
+%    Thus, when such a character is encountered in the document (so
+%    long as expansion is not prohibited) a defined number of
+%    additional octets (8-bit characters) are read and from them a
+%    unique control sequence name is immediately constructed.
+%
+%    This control sequence is either defined (good) or undefined
+%    (likely); in the latter case the user gets an error message
+%    saying that this UTF-8 sequence (or, better, Unicode character)
+%    is not supported.
+%
+%    If the control sequence is set up to do something useful then it will
+%    expand to a \LaTeX{} internal form: e.g.~for the utf8 sequence of
+%    two octets \texttt{"C3 "A4} we get |\"a| as the
+%    internal form which then, depending on the font encoding,
+%    eventually resolves to the single glyph `latin-a-umlaut' or to
+%    the composite glyph `latin-a with an umlaut accent'.
+%
+%    These mappings from (UTF-8 encoded) Unicode characters to \LaTeX{}
+%    internal forms are made indirectly.  The code below provides a
+%    declaration |\DeclareUnicodeCharacter| which maps Unicode numbers
+%    (as hexadecimal) to \LaTeX{} internal forms.
+%
+%    This mapping needs to be set up only once so it is done at
+%    |\begin{document}| by looking at the list of font encodings that
+%    are loaded by the document and providing mappings related to
+%    those font encodings whenever these are available. Thus at most
+%    only those Unicode characters that can be represented by the glyphs
+%    available in these encodings will be defined.
+%
+%    Technically this is done by loading one file per encoding,
+%    if available, that is supposed to provide the necessary mapping
+%    information.
+%
+%
+% \StopEventually{}
+%
+%
+%
+%
+% \section{Coding}
+%
+% \subsection{Housekeeping}
+%
+%    The usual introductory bits and pieces:
+%
+%    \begin{macrocode}
+%<utf8>\ProvidesFile{utf8.def}
+%<test>\ProvidesFile{utf8-test.tex}
+%<+lcy> \ProvidesFile{lcyenc.dfu}
+%<+ly1> \ProvidesFile{ly1enc.dfu}
+%<+oms> \ProvidesFile{omsenc.dfu}
+%<+ot1> \ProvidesFile{ot1enc.dfu}
+%<+ot2> \ProvidesFile{ot2enc.dfu}
+%<+t1>  \ProvidesFile{t1enc.dfu}
+%<+t2a> \ProvidesFile{t2aenc.dfu}
+%<+t2b> \ProvidesFile{t2benc.dfu}
+%<+t2c> \ProvidesFile{t2cenc.dfu}
+%<+ts1> \ProvidesFile{ts1enc.dfu}
+%<+x2>  \ProvidesFile{x2enc.dfu}
+%<+all> \ProvidesFile{utf8enc.dfu}
+   [2018/10/05 v1.2f UTF-8 support for inputenc]
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<*utf8>
+\makeatletter
+%    \end{macrocode}
+%    We restore the |\catcode| of space (which is set to ignore in
+%    \texttt{inputenc}) while reading \texttt{.def} files. Otherwise
+%    we would need to explicitly use |\space| all over the place in
+%    error and log messages.
+% \changes{v1.1d}{2004/05/08}{Explicitly set catcode of space}
+%    \begin{macrocode}
+\catcode`\ \saved@space@catcode
+%    \end{macrocode}
+%
+%
+%
+% \subsection{Parsing UTF-8 input}
+%
+% \begin{macro}{\UTFviii@two@octets}
+% \begin{macro}{\UTFviii@three@octets}
+% \begin{macro}{\UTFviii@four@octets}
+% \changes{v1.2a}{2018/03/24}{Macros made `\cs{long} for improved error messages}%
+%    A UTF-8 char (that is not actually a 7-bit char, i.e.~a single
+%    octet) is parsed as follows: each starting octet is an active
+%    \TeX{} character token; each of these is defined below to be a
+%    macro with one to three arguments nominally (depending on the
+%    starting octet). It calls one of |\UTFviii@two@octets|,
+%    |\UTFviii@three@octets|, or |\UTFviii@four@octets| which then
+%    actually picks up the argument(s).
+%
+%    From the arguments a control sequence with a name of the form
+%    \verb=u8:#1#2...= is constructed where the |#i| ($i>1$) are the
+%    arguments and |#1| is the starting octet (as a \TeX{} character
+%    token).  Since some or even all of these characters are active
+%    (when inputenc is loaded) we need to use |\string| when building
+%    the csname.
+%
+%    The csname thus constructed can of course be undefined but to
+%    avoid producing an unhelpful low-level undefined command error we
+%    pass it to |\UTFviii@defined| which is responsible for producing
+%    a more sensible error message (not yet done!!).  If, however, it is
+%    defined we simply execute the thing (which should then expand to
+%    an encoding specific internal \LaTeX{} form).
+%    \begin{macrocode}
+\long\def\UTFviii@two@octets#1#2{\expandafter
+    \UTFviii@defined\csname u8:#1\string#2\endcsname}
+%    \end{macrocode}
+% \end{macro}
+%
+%    \begin{macrocode}
+\long\def\UTFviii@three@octets#1#2#3{\expandafter
+    \UTFviii@defined\csname u8:#1\string#2\string#3\endcsname}
+%    \end{macrocode}
+% \end{macro}
+%
+%    \begin{macrocode}
+\long\def\UTFviii@four@octets#1#2#3#4{\expandafter
+    \UTFviii@defined\csname u8:#1\string#2\string#3\string#4\endcsname}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\UTFviii@defined}
+%    This tests whether its argument is different from |\relax|: it
+%    either calls for a sensible error message (not done), or it gets
+%    the |\fi| out of the way (in case the command has arguments) and
+%    executes it.
+%    \begin{macrocode}
+\def\UTFviii@defined#1{%
+  \ifx#1\relax
+%    \end{macrocode}
+% Test if the sequence is invalid UTF-8 or valid UTF-8 but without
+% a \LaTeX\ definition.
+%    \begin{macrocode}
+     \if\relax\expandafter\UTFviii@checkseq\string#1\relax\relax
+%    \end{macrocode}
+%    The endline character has a special definition within the
+%    inputenc package (it is gobbling spaces). For this reason we
+%    can't produce multiline strings without some precaution.
+% \changes{v1.1b}{2004/02/09}{No newlines allowed in error messages}
+% \changes{v1.1g}{2005/09/27}{Real spaces do not show up so use \cs{space}}
+% \changes{v1.1o}{2015/08/28}{Show Unicode number of character in hex}
+% \changes{v1.2a}{2018/03/24}{Error message improved for non-UTF-8 sequences}%
+%    \begin{macrocode}
+      \UTFviii@undefined@err{#1}%
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+     \else
+      \PackageError{inputenc}{Invalid UTF-8 byte sequence}%
+                             \UTFviii@invalid@help
+     \fi         
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+  \else\expandafter
+    #1%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\UTFviii@invalid@err}
+% \begin{macro}{\UTFviii@invalid@help}
+% \changes{v1.2a}{2018/03/24}{Macro added}%
+% \changes{v1.2f}{2018/10/05}{Show invalid byte in hex}%
+%    \begin{macrocode}
+\def\UTFviii@invalid@err#1{%
+ \PackageError{inputenc}{Invalid UTF-8 byte "\UTFviii@hexnumber{`#1}}%
+                        \UTFviii@invalid@help}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\def\UTFviii@invalid@help{%
+   The document does not appear to be in UTF-8 encoding.\MessageBreak
+   Try adding \noexpand\UseRawInputEncoding as the first line of the file\MessageBreak
+   or specify an encoding such as \noexpand\usepackage[latin1]{inputenc}\MessageBreak
+   in the document preamble.\MessageBreak
+   Alternatively, save the file in UTF-8 using your editor or another tool}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \begin{macro}{\UTFviii@undefined@err}
+% \changes{v1.2a}{2018/03/24}{Macro added}%
+%    \begin{macrocode}
+\def\UTFviii@undefined@err#1{%
+  \PackageError{inputenc}{Unicode character \expandafter
+                          \UTFviii@splitcsname\string#1\relax
+                          \MessageBreak
+                          not set up for use with LaTeX}%
+                         {You may provide a definition with\MessageBreak
+                          \noexpand\DeclareUnicodeCharacter}%
+   }
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \begin{macro}{\UTFviii@checkseq}
+% \begin{macro}{\UTFviii@check@continue}
+% \changes{v1.2a}{2018/03/24}{Macro added}%
+% Check that the csname consists of a valid UTF-8 sequence.
+%    \begin{macrocode}
+\def\UTFviii@checkseq#1:#2#3{%
+ \ifnum`#2<"80 %
+   \ifx\relax#3\else1\fi
+ \else
+   \ifnum`#2<"C0 %
+     1 %
+   \else
+     \expandafter\expandafter\expandafter\UTFviii@check@continue
+     \expandafter\expandafter\expandafter#3%
+   \fi
+  \fi}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\def\UTFviii@check@continue#1{%
+  \ifx\relax#1%
+  \else
+  \ifnum`#1<"80 1\else\ifnum`#1>"BF 1\fi\fi
+  \expandafter\UTFviii@check@continue
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+%
+% \begin{macro}{\UTFviii@loop}
+%    This bit of code derived from \texttt{xmltex}  defines the active character
+%    correspnding to starting octets to call |\UTFviii@two@octets| etc as appropriate.
+%    The starting octet itself is passed directly as the first argument, the others
+%    are picked up later en route.
+%
+%    The |\UTFviii@loop| loops through the numbers starting at
+%    |\count@| and ending at |\@tempcnta|${} - 1$, each time executing
+%    the code in |\UTFviii@tmp|.
+%
+%    All this is done in a group so that temporary catcode changes
+%    etc.~vanish after everything is set up.
+%
+%    \begin{macrocode}
+\begingroup
+\catcode`\~13
+\catcode`\"12
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\def\UTFviii@loop{%
+  \uccode`\~\count@
+  \uppercase\expandafter{\UTFviii@tmp}%
+  \advance\count@\@ne
+  \ifnum\count@<\@tempcnta
+  \expandafter\UTFviii@loop
+  \fi}
+%    \end{macrocode}
+%
+% Handle the single byte control characters.
+% \changes{v1.2a}{2018/03/24}{Loop over C0 controls added}%
+% C0 controls are valid UTF-8 but defined to give the ``Character not defined error''
+% They may be defined with |\DeclareUnicodeCharacter|.
+%    \begin{macrocode}
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@undefined@err{:\string~}}}
+% 0 ^^@ null
+    \count@"1
+    \@tempcnta9
+% 9 ^^I tab
+% 10 ^^J nl
+\UTFviii@loop
+    \count@11
+    \@tempcnta12
+\UTFviii@loop
+% 12 ^^L
+% 13 ^^M
+    \count@14
+    \@tempcnta32
+\UTFviii@loop
+%    \end{macrocode}
+%
+%
+% Bytes with leading bits |10| are not valid UTF-8 starting bytes
+%    \begin{macrocode}
+    \count@"80
+    \@tempcnta"C2
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@invalid@err\string~}}
+\UTFviii@loop
+%    \end{macrocode}
+%
+%    Setting up 2-byte UTF-8:
+%    \begin{macrocode}
+    \count@"C2
+    \@tempcnta"E0
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@two@octets\string~}}
+\UTFviii@loop
+%    \end{macrocode}
+%
+%    Setting up 3-byte UTF-8:
+%    \begin{macrocode}
+    \count@"E0
+    \@tempcnta"F0
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@three@octets\string~}}
+\UTFviii@loop
+%    \end{macrocode}
+%
+%    Setting up 4-byte UTF-8:
+% \changes{v1.2e}{2018/09/28}{Fix "F4 lead byte}%
+%    \begin{macrocode}
+    \count@"F0
+    \@tempcnta"F5
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@four@octets\string~}}
+\UTFviii@loop
+%    \end{macrocode}
+%
+% Bytes above F4 are not valid UTF-8 starting bytes as they would encode numbers beyond
+% the Unicode range
+%    \begin{macrocode}
+    \count@"F5
+    \@tempcnta"100
+    \def\UTFviii@tmp{\xdef~{\noexpand\UTFviii@invalid@err\string~}}
+\UTFviii@loop
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\endgroup
+%    \end{macrocode}
+%
+% \end{macro}
+%
+%    For this case we must disable the warning generated by
+%    \texttt{inputenc} if it doesn't see any new |\DeclareInputText|
+%    commands.
+%    \begin{macrocode}
+\@inpenc@test
+%    \end{macrocode}
+%
+%
+%    If this file (\texttt{utf8.def}) is not being read while setting
+%    up \texttt{inputenc}, i.e.~in the preamble, but when
+%    |\inputencoding| is called somewhere within the document, we do not
+%    need to input the specific Unicode mappings again. We therefore
+%    stop reading the file at this point.
+%    \begin{macrocode}
+\ifx\@begindocumenthook\@undefined
+  \makeatother
+%    \end{macrocode}
+%    The |\fi| must be on the same line as |\endinput| or else it will
+%    never be seen!
+%    \begin{macrocode}
+  \endinput \fi
+%    \end{macrocode}
+%
+%
+% \subsection{Mapping Unicode codes to \LaTeX{} internal forms}
+%
+%
+% \begin{macro}{\DeclareUnicodeCharacter}
+%    The |\DeclareUnicodeCharacter| declaration defines a mapping from
+%    a Unicode character code point to a \LaTeX{} internal form. The first
+%    argument is the Unicode number as hexadecimal digits and the second is
+%    the actual \LaTeX{} internal form.
+%
+%    We start by making sure that some characters have the right
+%    |\catcode| when they are used in the definitions below.
+%    \begin{macrocode}
+\begingroup
+\catcode`\"=12
+\catcode`\<=12
+\catcode`\.=12
+\catcode`\,=12
+\catcode`\;=12
+\catcode`\!=12
+\catcode`\~=13
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\gdef\DeclareUnicodeCharacter#1#2{%
+  \count@"#1\relax
+  \wlog{ \space\space defining Unicode char U+#1 (decimal \the\count@)}%
+  \begingroup
+%    \end{macrocode}
+%    Next we do the parsing of the number stored in |\count@| and assign the
+%    result to |\UTFviii@tmp|. Actually all this could be done in-line,
+%    the macro |\parse@XML@charref| is only there to extend this code
+%    to parsing Unicode numbers in other contexts one day (perhaps).
+%    \begin{macrocode}
+    \parse@XML@charref
+%    \end{macrocode}
+%
+%    Here is an example of what is happening, for the pair \texttt{"C2 "A3}
+%    (which is the utf8 represenation for the character \textsterling{}).
+%    After |\parse@XML@charref| we have, stored in |\UTFviii@tmp|, a
+%    single command with two character tokens as arguments:
+%    \begin{quote}
+%      [$t_{C2}$ and $t_{A3}$ are the characters corresponding to these
+%      two octets]\\
+%      |\UTFviii@two@octets| $t_{\rm C2}t_{\rm A3}$
+%    \end{quote}
+%    what we actually need to produce is a definition of the form
+%    \begin{quote}
+%    |\def\u8:|$t_{\rm C2}$$t_{\rm A3}$ |{|\textit{\LaTeX{} internal form}|}|\,.
+%    \end{quote}
+%    So here we temporarily redefine the prefix commands
+%    |\UTFviii@two@octets|, etc.~to
+%    generate the csname that we wish to define>  the |\string|s are
+%    added in case these tokens are still active.
+%    \begin{macrocode}
+    \def\UTFviii@two@octets##1##2{\csname u8:##1\string##2\endcsname}%
+    \def\UTFviii@three@octets##1##2##3{\csname u8:##1%
+                                     \string##2\string##3\endcsname}%
+    \def\UTFviii@four@octets##1##2##3##4{\csname u8:##1%
+                           \string##2\string##3\string##4\endcsname}%
+%    \end{macrocode}
+%    Now we simply:-) need to use the right number of |\expandafter|s to
+%    finally construct the definition: expanding |\UTFviii@tmp| once to get
+%    its contents, a second time to replace the prefix command by its
+%    |\csname| expansion, and a third time to turn the expansion into
+%    a csname after which the |\gdef| finally gets applied.
+%    We add an irrelevant |\IeC| and braces around the definition, in
+%    order to avoid any space after the command being gobbled up
+%    when the text is written out to an auxiliary file (see
+%    \texttt{inputenc} for further details
+%    \begin{macrocode}
+    \expandafter\expandafter\expandafter
+    \expandafter\expandafter\expandafter
+    \expandafter
+     \gdef\UTFviii@tmp{\IeC{#2}}%
+   \endgroup
+}
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \begin{macro}{\parse@XML@charref}
+%    This macro parses a Unicode number (decimal) and returns its
+%    UTF-8 representation as a sequence of non-active \TeX{} character
+%    tokens. In the
+%    original code it had two arguments delimited by \texttt{;} here,
+%    however, we supply the Unicode number implicitly.
+%    \begin{macrocode}
+\gdef\parse@XML@charref{%
+%    \end{macrocode}
+%    We need to keep a few things local, mainly the |\uccode|'s that
+%    are set up below. However, the group originally used here is
+%    actually unnecessary since we call this macro only within another
+%    group; but it will be important to restore the group if this
+%    macro gets used for other purposes.
+%    \begin{macrocode}
+%  \begingroup
+%    \end{macrocode}
+%    The original code from \texttt{xmltex} supported the convention that a
+%    Unicode slot number could be given either as a decimal or as a
+%    hexadecimal (by starting with \texttt{x}).  We do not do this so
+%    this code is also removed.  This could be reactivated if one
+%    wants to support document commands that accept Unicode numbers
+%    (but then the first case needs to be changed from an error
+%    message back to something more useful again).
+%    \begin{macrocode}
+%  \uppercase{\count@\if x\noexpand#1"\else#1\fi#2}\relax
+%    \end{macrocode}
+%    As |\count@| already contains the right value we make
+%    |\parse@XML@charref| work without arguments.
+% \changes{v1.1g}{2005/09/27}{Real spaces do not show up so use \cs{space}}
+% \changes{v1.2a}{2018/03/24}{Allow control characters if active}
+% In the case single byte UTF-8 sequences, only allow definition if
+% the character os already active.  The definition of |\UTFviii@tmp|
+% looks slightly strange but is designed for the sequence of |\expandafter|
+% in |\DeclareUnicodeCharacter|.
+% 
+%    \begin{macrocode}
+  \ifnum\count@<"A0\relax
+    \ifnum\catcode\count@=13
+      \uccode`\~=\count@\uppercase{\def\UTFviii@tmp{\@empty\@empty~}}%
+    \else
+      \PackageError{inputenc}%
+                   {Cannot define non-active Unicode char value < 00A0}%
+                   \@eha
+      \def\UTFviii@tmp{\UTFviii@tmp}%
+    \fi
+%    \end{macrocode}
+%    The code below is derived from \texttt{xmltex} and generates the UTF-8 byte sequence
+%    for the number in |\count@|.
+%
+%    The reverse operation (just used in error messages) 
+%    has now been added as \cs{decode@UTFviii}.
+%    \begin{macrocode}
+  \else\ifnum\count@<"800\relax
+     \parse@UTFviii@a,%
+     \parse@UTFviii@b C\UTFviii@two@octets.,%
+  \else\ifnum\count@<"10000\relax
+     \parse@UTFviii@a;%
+     \parse@UTFviii@a,%
+     \parse@UTFviii@b E\UTFviii@three@octets.{,;}%
+   \else
+%    \end{macrocode}
+%
+% Test added here for out of range values, the 4-octet definitions are still set up
+% so that |\DeclareUnicodeCharacter| does something sensible if the user scrolls
+% past this error.
+%    \begin{macrocode}
+     \ifnum\count@>"10FFFF\relax
+           \PackageError{inputenc}%
+                {\UTFviii@hexnumber\count@\space too large for Unicode}%
+                {Values between 0 and 10FFFF are permitted}%
+      \fi
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+     \parse@UTFviii@a;%
+     \parse@UTFviii@a,%
+     \parse@UTFviii@a!%
+     \parse@UTFviii@b F\UTFviii@four@octets.{!,;}%
+    \fi
+    \fi
+  \fi
+%  \endgroup
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\parse@UTFviii@a}
+%    \ldots so somebody else can document this part :-)
+% \changes{v1.1b}{2004/02/09}{Space in the wrong place \cs{count @64}}
+%    \begin{macrocode}
+\gdef\parse@UTFviii@a#1{%
+     \@tempcnta\count@
+     \divide\count@ 64
+     \@tempcntb\count@
+     \multiply\count@ 64
+     \advance\@tempcnta-\count@
+     \advance\@tempcnta 128
+     \uccode`#1\@tempcnta
+     \count@\@tempcntb}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\parse@UTFviii@b}
+%    \ldots same here
+%    \begin{macrocode}
+\gdef\parse@UTFviii@b#1#2#3#4{%
+     \advance\count@ "#10\relax
+     \uccode`#3\count@
+     \uppercase{\gdef\UTFviii@tmp{#2#3#4}}}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\decode@UTFviii}
+% \changes{v1.1o}{2015/08/28}{Macro added}
+%    In the reverse direction, take a sequence of octects(bytes)
+%    representing a character in UTF-8 and construct the Unicode number.
+%    The sequence is terminated by |\relax|.
+%
+%    In this version, if the sequence is not valid UTF-8 you probably
+%    get a low level arithmetic error from |\numexpr| or stray characters
+%    at the end. Getting a better error message would be somewhat expensive.
+%    As the main use is for reporting characters in messages, this is done
+%    just using expansion, so |\numexpr| is used, A stub returning 0 is defined
+%    if |\numexpr| is not available.
+%    \begin{macrocode}
+\ifx\numexpr\@undefined
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\gdef\decode@UTFviii#1{0}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\else
+%    \end{macrocode}
+%
+% If the input is malformed UTF-8 there may not be enough closing ) so
+% add 5 so there are always some remaining then cleanup and remove
+% any remaining ones at the end. This avoids |\numexpr| parse errors
+% while outputting a package error.
+%    \begin{macrocode}
+\gdef\decode@UTFviii#1\relax{%
+  \expandafter\UTFviii@cleanup
+    \the\numexpr\dec@de@UTFviii#1\relax)))))\@empty}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\gdef\UTFviii@cleanup#1)#2\@empty{#1}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\gdef\dec@de@UTFviii#1{%
+\ifx\relax#1%
+\else
+  \ifnum`#1>"EF 
+    ((((`#1-"F0)%
+  \else
+    \ifnum`#1>"DF 
+      (((`#1-"E0)%
+    \else
+      \ifnum`#1>"BF 
+        ((`#1-"C0)%
+      \else
+        \ifnum`#1>"7F 
+        )*64+(`#1-"80)%
+        \else
+        +`#1 %
+        \fi
+      \fi
+    \fi
+  \fi
+  \expandafter\dec@de@UTFviii
+\fi}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\fi
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\UTFviii@hexnumber}
+% \changes{v1.1o}{2015/08/28}{Macro added}
+%    Convert a number to a sequence of uppercase hex digits.
+% If |\numexpr| is not available, it returns its argument unchanged.
+%    \begin{macrocode}
+\ifx\numexpr\@undefined
+%    \end{macrocode}
+%    \begin{macrocode}
+\global\let\UTFviii@hexnumber\@firstofone
+\global\UTFviii@hexdigit\hexnumber@
+%    \end{macrocode}
+%    \begin{macrocode}
+\else
+%    \end{macrocode}
+%    \begin{macrocode}
+\gdef\UTFviii@hexnumber#1{%
+\ifnum#1>15 %
+\expandafter\UTFviii@hexnumber\expandafter{\the\numexpr(#1-8)/16\relax}%
+\fi
+\UTFviii@hexdigit{\numexpr#1\ifnum#1>0-((#1-8)/16)*16\fi\relax}%
+}
+%    \end{macrocode}
+%
+% Almost but not quite |\hexnumber@|.
+%    \begin{macrocode}
+\gdef\UTFviii@hexdigit#1{\ifcase\numexpr#1\relax
+  0\or1\or2\or3\or4\or5\or6\or7\or8\or9\or
+  A\or B\or C\or D\or E\or F\fi}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\fi
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\UTFviii@splitcsname}
+% \changes{v1.1o}{2015/08/28}{Macro added}
+% \begin{macro}{\UTFviii@hexcodepoint}
+% \changes{v1.2e}{2018/09/28}{Macro added: Format codepoint properly}
+%    Split a csname representing a unicode character and return
+%    the character and the unicode number in hex.
+%    \begin{macrocode}
+\gdef\UTFviii@hexcodepoint#1{U+%
+ \ifnum#1<16 0\fi
+ \ifnum#1<256 0\fi
+ \ifnum#1<4096 0\fi
+ \UTFviii@hexnumber{#1}%
+}%
+\gdef\UTFviii@splitcsname#1:#2\relax{%
+%    \end{macrocode}
+% \changes{v1.2b}{2018/03/26}{add percent as \cs{endlinechar} not -1 in the format}%
+% Need to pre-expand the argument to ensure cleanup in case of mal-formed UTF-8.
+%    \begin{macrocode}
+#2 (\expandafter\UTFviii@hexcodepoint\expandafter{%
+                     \the\numexpr\decode@UTFviii#2\relax})%
+}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+%    \begin{macrocode}
+\endgroup
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\@onlypreamble\DeclareUnicodeCharacter
+%    \end{macrocode}
+%    These are preamble only as long as we don't support Unicode
+%    charrefs in documents.
+%    \begin{macrocode}
+\@onlypreamble\parse@XML@charref
+\@onlypreamble\parse@UTFviii@a
+\@onlypreamble\parse@UTFviii@b
+%    \end{macrocode}
+%
+%
+% \subsection{Loading Unicode mappings at begin document}
+%
+% The original plan was to set up the UTF-8 support at
+% |\begin{document}|; but then any text characters used in the preamble
+% (as people do even though advised against it) would fail in one way or
+% the other.
+% So the implementation was changed and the Unicode definition files
+% for already defined encodings are loaded here.
+%
+%    We loop through all defined font encodings
+%    (stored in |\cdp@list|) and for each load a file
+%    \textit{name}\texttt{enc.dfu} if it exist. That file is then
+%    supposed to contain |\DeclareUnicodeCharacter| declarations.
+%    \begin{macrocode}
+\begingroup
+  \def\cdp@elt#1#2#3#4{%
+    \wlog{Now handling font encoding #1 ...}%
+    \lowercase{%
+        \InputIfFileExists{#1enc.dfu}}%
+           {\wlog{... processing UTF-8 mapping file for font %
+                     encoding #1}%
+%    \end{macrocode}
+% \changes{v1.1m}{2008/04/05}{Ensure we don't lose spaces in the log}
+%    The previous line is written to the log with the newline char being
+%    ignored (thus not producing a space). Therefore either everything has to
+%    be on a single input line or some special care must be taken.  From this
+%    point on we ignore spaces again, i.e., while we are reading the
+%    \texttt{.dfu} file. The |\endgroup| below will restore it again.
+% \changes{v1.1d}{2004/05/08}{Explicitly set catcode of space}
+% \changes{v1.1g}{2005/09/27}{We lost the ``false'' case}
+%    \begin{macrocode}
+            \catcode`\ 9\relax}%
+          {\wlog{... no UTF-8 mapping file for font encoding #1}}%
+  }
+  \cdp@list
+\endgroup
+%    \end{macrocode}
+% However, we don't know if there are font encodings still to be
+% loaded (either with \texttt{fontenc} or directly with |\input| by
+% some some package). Font encoding files are loaded only if the
+% corresponding encoding has not been loaded yet, and they always
+% begin with |\DeclareFontEncoding|. We now redefine the internal
+% kernel version of the latter to load the Unicode file if available.
+%
+%    \begin{macrocode}
+\def\DeclareFontEncoding@#1#2#3{%
+  \expandafter
+  \ifx\csname T@#1\endcsname\relax
+    \def\cdp@elt{\noexpand\cdp@elt}%
+    \xdef\cdp@list{\cdp@list\cdp@elt{#1}%
+                    {\default@family}{\default@series}%
+                    {\default@shape}}%
+    \expandafter\let\csname#1-cmd\endcsname\@changed@cmd
+    \begingroup
+      \wlog{Now handling font encoding #1 ...}%
+      \lowercase{%
+        \InputIfFileExists{#1enc.dfu}}%
+           {\wlog{... processing UTF-8 mapping file for font %
+                      encoding #1}}%
+           {\wlog{... no UTF-8 mapping file for font encoding #1}}%
+    \endgroup
+  \else
+     \@font@info{Redeclaring font encoding #1}%
+  \fi
+  \global\@namedef{T@#1}{#2}%
+  \global\@namedef{M@#1}{\default@M#3}%
+  \xdef\LastDeclaredEncoding{#1}%
+  }
+%</utf8>
+%    \end{macrocode}
+%
+%
+%
+% \section{Mapping characters ---\newline based on font (glyph) encodings}
+%
+% This section is a first attempt to provide Unicode definitions for
+% characters whose standard glyphs are currently provided by the
+% standard \LaTeX{} font-encodings |T1|, |OT1|, etc. They are by
+% no means completed and need checking.
+%
+% For example, one should check the already existing input encodings
+%    for glyphs that may in fact be available and required,
+%    e.g.~\texttt{latin4} has a number of glyphs with the |\=|
+%    accent. Since the |T1| encoding does not provide such glyphs,
+%    these characters are not listed below (yet).
+%
+% The list below was generated by looking at the current \LaTeX{} font
+%    encoding files, e.g., \texttt{t1enc.def} and using the work by
+%    Sebastian Rahtz (in \texttt{ucharacters.sty}) with a few
+%    modifications. In combinations such as |\^\i| the preferred form
+%    is that and not |\^i|.
+%
+% This list has been built from several sources, obviously including
+% the Unicode Standard itself. These sources include Passive \TeX{} by
+% Sebastian Rahtz, the \texttt{unicode}
+% package by Dominique P. G. Unruh (mainly for Latin encodings) and
+% \texttt{text4ht} by Eitan Gurari (for Cyrillic ones).
+%
+% Note that it strictly follows the Mittelbach principles for
+% input character encodings: thus it offers no support for using utf8
+% representations of math symbols such as $\times$ or $\div$ (in math mode).
+%
+%
+% \subsection{About the table itself}
+%
+% In addition to generating individual files, the table below is, at present,
+% a one-one (we think) partial relationship between the (ill-defined) set
+% of LICRs and the Unicode slots "0080 to "FFFF.  At present these entries
+% are used only to define a collection of partial mappings from Unicode
+% slots to LICRs; each of these mappings becomes full if we add an exception
+% value (`not defined') to the set of LICRs.
+%
+% It is probably not essential for the relationship in the full table to be
+% one-one; this raises questions such as: the exact role of LICRs;
+% the formal relationships on the set of LICRs; the (non-mathematical)
+% relationship between
+% LICRs and Unicode (which has its own somewhat fuzzy equivalences);
+% and ultimately what a character is and what a character representation
+% and/or name is.
+%
+% It is unclear the extent to which entries in this table should
+% resemble the closely related ones in the 8-bit \texttt{inputenc} files.
+% The Unicode standard claims that the first 256 slots `are' ASCII and
+% Latin-1.
+%
+% Of course, \TeX{} itself typically does not treat even many perfectly
+% `normal text' 7-bit slots as text characters, so it is unclear
+% whether \LaTeX{} should even attempt to deal in any consistent way with
+% those Unicode slots that are not definitive text characters.
+%
+%
+% \subsection{The mapping table}
+%
+% \begingroup
+% \hfuzz=12pt ^^A just because
+%
+% Note that the first argument must be a hex-digit number greater
+% than \texttt{00BF} and at most \texttt{10FFFF}.
+%
+% There are few notes about inconsistencies etc at the end of the table.
+%
+% \changes{v1.1o}{2015/08/28}{Add U+00A0 and U+00AD}
+% \changes{v1.1q}{2015/12/02}{Add remaining latin uses of accents in T1}
+% \changes{v1.1r}{2015/12/03}{Add some more ogoneck cases}
+% \changes{v1.1s}{2016/01/11}{Add some more caron and acute}
+% \changes{v1.1t}{2017/01/28}{Add caron cominations for GgYy}
+%    \begin{macrocode}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00A0}{\nobreakspace}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00A1}{\textexclamdown}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00A2}{\textcent}
+%<all,ts1,t1,ot1,ly1>\DeclareUnicodeCharacter{00A3}{\textsterling}
+%<all,x2,ts1,t2c,t2b,t2a,ly1,lcy>\DeclareUnicodeCharacter{00A4}{\textcurrency}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00A5}{\textyen}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00A6}{\textbrokenbar}
+%<all,x2,ts1,t2c,t2b,t2a,oms,ly1>\DeclareUnicodeCharacter{00A7}{\textsection}
+%<all,ts1>\DeclareUnicodeCharacter{00A8}{\textasciidieresis}
+%<all,ts1,utf8>\DeclareUnicodeCharacter{00A9}{\textcopyright}
+%<all,ts1,ly1,utf8>\DeclareUnicodeCharacter{00AA}{\textordfeminine}
+%<*all,x2,t2c,t2b,t2a,t1,ot2,ly1,lcy>
+\DeclareUnicodeCharacter{00AB}{\guillemotleft}
+%</all,x2,t2c,t2b,t2a,t1,ot2,ly1,lcy>
+%<all,ts1>\DeclareUnicodeCharacter{00AC}{\textlnot}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00AD}{\-}
+%<all,ts1,ly1,utf8>\DeclareUnicodeCharacter{00AE}{\textregistered}
+%<all,ts1>\DeclareUnicodeCharacter{00AF}{\textasciimacron}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00B0}{\textdegree}
+%<all,ts1>\DeclareUnicodeCharacter{00B1}{\textpm}
+%<all,ts1>\DeclareUnicodeCharacter{00B2}{\texttwosuperior}
+%<all,ts1>\DeclareUnicodeCharacter{00B3}{\textthreesuperior}
+%<all,ts1>\DeclareUnicodeCharacter{00B4}{\textasciiacute}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00B5}{\textmu} % micro sign
+%<all,ts1,oms,ly1>\DeclareUnicodeCharacter{00B6}{\textparagraph}
+%<all,oms,ts1,ly1>\DeclareUnicodeCharacter{00B7}{\textperiodcentered}
+%<all,ot1>\DeclareUnicodeCharacter{00B8}{\c\ }
+%<all,ts1>\DeclareUnicodeCharacter{00B9}{\textonesuperior}
+%<all,ts1,ly1,utf8>\DeclareUnicodeCharacter{00BA}{\textordmasculine}
+%<*all,x2,t2c,t2b,t2a,t1,ot2,ly1,lcy>
+\DeclareUnicodeCharacter{00BB}{\guillemotright}
+%</all,x2,t2c,t2b,t2a,t1,ot2,ly1,lcy>
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00BC}{\textonequarter}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00BD}{\textonehalf}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{00BE}{\textthreequarters}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00BF}{\textquestiondown}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C0}{\@tabacckludge`A}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C1}{\@tabacckludge'A}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C2}{\^A}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C3}{\~A}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C4}{\"A}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00C5}{\r A}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{00C6}{\AE}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C7}{\c C}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C8}{\@tabacckludge`E}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00C9}{\@tabacckludge'E}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CA}{\^E}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CB}{\"E}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CC}{\@tabacckludge`I}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CD}{\@tabacckludge'I}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CE}{\^I}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00CF}{\"I}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D0}{\DH}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D1}{\~N}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D2}{\@tabacckludge`O}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D3}{\@tabacckludge'O}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D4}{\^O}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D5}{\~O}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D6}{\"O}
+%<all,ts1>\DeclareUnicodeCharacter{00D7}{\texttimes}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{00D8}{\O}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00D9}{\@tabacckludge`U}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00DA}{\@tabacckludge'U}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00DB}{\^U}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00DC}{\"U}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00DD}{\@tabacckludge'Y}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00DE}{\TH}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{00DF}{\ss}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E0}{\@tabacckludge`a}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E1}{\@tabacckludge'a}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E2}{\^a}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E3}{\~a}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E4}{\"a}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E5}{\r a}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{00E6}{\ae}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E7}{\c c}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E8}{\@tabacckludge`e}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00E9}{\@tabacckludge'e}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00EA}{\^e}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00EB}{\"e}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00EC}{\@tabacckludge`\i}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00ED}{\@tabacckludge'\i}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00EE}{\^\i}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{00EF}{\"\i}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F0}{\dh}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F1}{\~n}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F2}{\@tabacckludge`o}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F3}{\@tabacckludge'o}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F4}{\^o}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F5}{\~o}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F6}{\"o}
+%<all,ts1>\DeclareUnicodeCharacter{00F7}{\textdiv}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{00F8}{\o}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00F9}{\@tabacckludge`u}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FA}{\@tabacckludge'u}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FB}{\^u}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FC}{\"u}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FD}{\@tabacckludge'y}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FE}{\th}
+%<all,t1,ly1>\DeclareUnicodeCharacter{00FF}{\"y}
+%<all,t1>\DeclareUnicodeCharacter{0100}{\@tabacckludge=A}
+%<all,t1>\DeclareUnicodeCharacter{0101}{\@tabacckludge=a}
+%<all,t1>\DeclareUnicodeCharacter{0102}{\u A}
+%<all,t1>\DeclareUnicodeCharacter{0103}{\u a}
+%<all,t1>\DeclareUnicodeCharacter{0104}{\k A}
+%<all,t1>\DeclareUnicodeCharacter{0105}{\k a}
+%<all,t1>\DeclareUnicodeCharacter{0106}{\@tabacckludge'C}
+%<all,t1>\DeclareUnicodeCharacter{0107}{\@tabacckludge'c}
+%<all,t1>\DeclareUnicodeCharacter{0108}{\^C}
+%<all,t1>\DeclareUnicodeCharacter{0109}{\^c}
+%<all,t1>\DeclareUnicodeCharacter{010A}{\.C}
+%<all,t1>\DeclareUnicodeCharacter{010B}{\.c}
+%<all,t1>\DeclareUnicodeCharacter{010C}{\v C}
+%<all,t1>\DeclareUnicodeCharacter{010D}{\v c}
+%<all,t1>\DeclareUnicodeCharacter{010E}{\v D}
+%<all,t1>\DeclareUnicodeCharacter{010F}{\v d}
+%<all,t1>\DeclareUnicodeCharacter{0110}{\DJ}
+%<all,t1>\DeclareUnicodeCharacter{0111}{\dj}
+%<all,t1>\DeclareUnicodeCharacter{0112}{\@tabacckludge=E}
+%<all,t1>\DeclareUnicodeCharacter{0113}{\@tabacckludge=e}
+%<all,t1>\DeclareUnicodeCharacter{0114}{\u E}
+%<all,t1>\DeclareUnicodeCharacter{0115}{\u e}
+%<all,t1>\DeclareUnicodeCharacter{0116}{\.E}
+%<all,t1>\DeclareUnicodeCharacter{0117}{\.e}
+%<all,t1>\DeclareUnicodeCharacter{0118}{\k E}
+%<all,t1>\DeclareUnicodeCharacter{0119}{\k e}
+%<all,t1>\DeclareUnicodeCharacter{011A}{\v E}
+%<all,t1>\DeclareUnicodeCharacter{011B}{\v e}
+%<all,t1>\DeclareUnicodeCharacter{011C}{\^G}
+%<all,t1>\DeclareUnicodeCharacter{011D}{\^g}
+%<all,t1>\DeclareUnicodeCharacter{011E}{\u G}
+%<all,t1>\DeclareUnicodeCharacter{011F}{\u g}
+%<all,t1>\DeclareUnicodeCharacter{0120}{\.G}
+%<all,t1>\DeclareUnicodeCharacter{0121}{\.g}
+%<all,t1>\DeclareUnicodeCharacter{0122}{\c G}
+%<all,t1>\DeclareUnicodeCharacter{0123}{\c g}
+%<all,t1>\DeclareUnicodeCharacter{0124}{\^H}
+%<all,t1>\DeclareUnicodeCharacter{0125}{\^h}
+%<all,t1>\DeclareUnicodeCharacter{0128}{\~I}
+%<all,t1>\DeclareUnicodeCharacter{0129}{\~\i}
+%<all,t1>\DeclareUnicodeCharacter{012A}{\@tabacckludge=I}
+%<all,t1>\DeclareUnicodeCharacter{012B}{\@tabacckludge=\i}
+%<all,t1>\DeclareUnicodeCharacter{012C}{\u I}
+%<all,t1>\DeclareUnicodeCharacter{012D}{\u\i}
+%<all,t1>\DeclareUnicodeCharacter{012E}{\k I}
+%<all,t1>\DeclareUnicodeCharacter{012F}{\k\i}
+%<all,t1>\DeclareUnicodeCharacter{0130}{\.I}
+%<all,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>\DeclareUnicodeCharacter{0131}{\i}
+%<all,t1>\DeclareUnicodeCharacter{0132}{\IJ}
+%<all,t1>\DeclareUnicodeCharacter{0133}{\ij}
+%<all,t1>\DeclareUnicodeCharacter{0134}{\^J}
+%<all,t1>\DeclareUnicodeCharacter{0135}{\^\j}
+%<all,t1>\DeclareUnicodeCharacter{0136}{\c K}
+%<all,t1>\DeclareUnicodeCharacter{0137}{\c k}
+%<all,t1>\DeclareUnicodeCharacter{0139}{\@tabacckludge'L}
+%<all,t1>\DeclareUnicodeCharacter{013A}{\@tabacckludge'l}
+%<all,t1>\DeclareUnicodeCharacter{013B}{\c L}
+%<all,t1>\DeclareUnicodeCharacter{013C}{\c l}
+%<all,t1>\DeclareUnicodeCharacter{013D}{\v L}
+%<all,t1>\DeclareUnicodeCharacter{013E}{\v l}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0141}{\L}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0142}{\l}
+%<all,t1>\DeclareUnicodeCharacter{0143}{\@tabacckludge'N}
+%<all,t1>\DeclareUnicodeCharacter{0144}{\@tabacckludge'n}
+%<all,t1>\DeclareUnicodeCharacter{0145}{\c N}
+%<all,t1>\DeclareUnicodeCharacter{0146}{\c n}
+%<all,t1>\DeclareUnicodeCharacter{0147}{\v N}
+%<all,t1>\DeclareUnicodeCharacter{0148}{\v n}
+%<all,t1>\DeclareUnicodeCharacter{014A}{\NG}
+%<all,t1>\DeclareUnicodeCharacter{014B}{\ng}
+%<all,t1>\DeclareUnicodeCharacter{014C}{\@tabacckludge=O}
+%<all,t1>\DeclareUnicodeCharacter{014D}{\@tabacckludge=o}
+%<all,t1>\DeclareUnicodeCharacter{014E}{\u O}
+%<all,t1>\DeclareUnicodeCharacter{014F}{\u o}
+%<all,t1>\DeclareUnicodeCharacter{0150}{\H O}
+%<all,t1>\DeclareUnicodeCharacter{0151}{\H o}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{0152}{\OE}
+%<all,t1,ot1,ly1,lcy>\DeclareUnicodeCharacter{0153}{\oe}
+%<all,t1>\DeclareUnicodeCharacter{0154}{\@tabacckludge'R}
+%<all,t1>\DeclareUnicodeCharacter{0155}{\@tabacckludge'r}
+%<all,t1>\DeclareUnicodeCharacter{0156}{\c R}
+%<all,t1>\DeclareUnicodeCharacter{0157}{\c r}
+%<all,t1>\DeclareUnicodeCharacter{0158}{\v R}
+%<all,t1>\DeclareUnicodeCharacter{0159}{\v r}
+%<all,t1>\DeclareUnicodeCharacter{015A}{\@tabacckludge'S}
+%<all,t1>\DeclareUnicodeCharacter{015B}{\@tabacckludge's}
+%<all,t1>\DeclareUnicodeCharacter{015C}{\^S}
+%<all,t1>\DeclareUnicodeCharacter{015D}{\^s}
+%<all,t1>\DeclareUnicodeCharacter{015E}{\c S}
+%<all,t1>\DeclareUnicodeCharacter{015F}{\c s}
+%<all,t1,ly1>\DeclareUnicodeCharacter{0160}{\v S}
+%<all,t1,ly1>\DeclareUnicodeCharacter{0161}{\v s}
+%<all,t1>\DeclareUnicodeCharacter{0162}{\c T}
+%<all,t1>\DeclareUnicodeCharacter{0163}{\c t}
+%<all,t1>\DeclareUnicodeCharacter{0164}{\v T}
+%<all,t1>\DeclareUnicodeCharacter{0165}{\v t}
+%<all,t1>\DeclareUnicodeCharacter{0168}{\~U}
+%<all,t1>\DeclareUnicodeCharacter{0169}{\~u}
+%<all,t1>\DeclareUnicodeCharacter{016A}{\@tabacckludge=U}
+%<all,t1>\DeclareUnicodeCharacter{016B}{\@tabacckludge=u}
+%<all,t1>\DeclareUnicodeCharacter{016C}{\u U}
+%<all,t1>\DeclareUnicodeCharacter{016D}{\u u}
+%<all,t1>\DeclareUnicodeCharacter{016E}{\r U}
+%<all,t1>\DeclareUnicodeCharacter{016F}{\r u}
+%<all,t1>\DeclareUnicodeCharacter{0170}{\H U}
+%<all,t1>\DeclareUnicodeCharacter{0171}{\H u}
+%<all,t1>\DeclareUnicodeCharacter{0172}{\k U}
+%<all,t1>\DeclareUnicodeCharacter{0173}{\k u}
+%    \end{macrocode}
+%
+% \changes{v1.1p}{2015/09/07}{Welsh circumflex combinations}
+%    \begin{macrocode}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0174}{\^W}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0175}{\^w}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0176}{\^Y}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0177}{\^y}
+%<all,t1,ly1>\DeclareUnicodeCharacter{0178}{\"Y}
+%<all,t1>\DeclareUnicodeCharacter{0179}{\@tabacckludge'Z}
+%<all,t1>\DeclareUnicodeCharacter{017A}{\@tabacckludge'z}
+%<all,t1>\DeclareUnicodeCharacter{017B}{\.Z}
+%<all,t1>\DeclareUnicodeCharacter{017C}{\.z}
+%<all,t1,ly1>\DeclareUnicodeCharacter{017D}{\v Z}
+%<all,t1,ly1>\DeclareUnicodeCharacter{017E}{\v z}
+%<all,ts1,ly1>\DeclareUnicodeCharacter{0192}{\textflorin}
+%    \end{macrocode}
+% \changes{v1.1s}{2016/01/11}{add 01CD-01F4}
+%    \begin{macrocode}
+%<all,t1>\DeclareUnicodeCharacter{01CD}{\v A}
+%<all,t1>\DeclareUnicodeCharacter{01CE}{\v a}
+%<all,t1>\DeclareUnicodeCharacter{01CF}{\v I}
+%<all,t1>\DeclareUnicodeCharacter{01D0}{\v \i}
+%<all,t1>\DeclareUnicodeCharacter{01D1}{\v O}
+%<all,t1>\DeclareUnicodeCharacter{01D2}{\v o}
+%<all,t1>\DeclareUnicodeCharacter{01D3}{\v U}
+%<all,t1>\DeclareUnicodeCharacter{01D4}{\v u}
+%<all,t1>\DeclareUnicodeCharacter{01E2}{\@tabacckludge=\AE}
+%<all,t1>\DeclareUnicodeCharacter{01E3}{\@tabacckludge=\ae}
+%<all,t1>\DeclareUnicodeCharacter{01E6}{\v G}
+%<all,t1>\DeclareUnicodeCharacter{01E7}{\v g}
+%<all,t1>\DeclareUnicodeCharacter{01E8}{\v K}
+%<all,t1>\DeclareUnicodeCharacter{01E9}{\v k}
+%<all,t1>\DeclareUnicodeCharacter{01EA}{\k O}
+%<all,t1>\DeclareUnicodeCharacter{01EB}{\k o}
+%<all,t1>\DeclareUnicodeCharacter{01F0}{\v\j}
+%<all,t1>\DeclareUnicodeCharacter{01F4}{\@tabacckludge'G}
+%<all,t1>\DeclareUnicodeCharacter{01F5}{\@tabacckludge'g}
+%    \end{macrocode}
+% \changes{v1.1o}{2015/08/28}{comma accent latex/4414}
+%    \begin{macrocode}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0218}{\textcommabelow S}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{0219}{\textcommabelow s}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{021A}{\textcommabelow T}
+%<all,t1,ot1,ly1>\DeclareUnicodeCharacter{021B}{\textcommabelow t}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,t1>\DeclareUnicodeCharacter{0232}{\@tabacckludge=Y}
+%<all,t1>\DeclareUnicodeCharacter{0233}{\@tabacckludge=y}
+%<all,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>\DeclareUnicodeCharacter{0237}{\j}
+%<all,ly1,utf8>\DeclareUnicodeCharacter{02C6}{\textasciicircum}
+%<all,ts1>\DeclareUnicodeCharacter{02C7}{\textasciicaron}
+%<all,ly1,utf8>\DeclareUnicodeCharacter{02DC}{\textasciitilde}
+%<all,ts1>\DeclareUnicodeCharacter{02D8}{\textasciibreve}
+%<all,t1>\DeclareUnicodeCharacter{02D9}{\.{}}
+%<all,t1>\DeclareUnicodeCharacter{02DB}{\k{}}
+%<all,ts1>\DeclareUnicodeCharacter{02DD}{\textacutedbl}
+%    \end{macrocode}
+%    The Cyrillic code points have been recently checked (2007) and extended
+%    and corrected by Matthias Noe (\verb=a9931078@unet.univie.ac.at=) --- thanks.
+% \changes{v1.1j}{2007/11/09}{Added a few new unicode decls in cyrillic (pr/3988)}
+% \changes{v1.1k}{2007/11/11}{Added and further unicode decls in cyrillic}
+% \changes{v1.1n}{2015/06/27}{correct accent https://tex.stackexchange.com/q/252521}
+%    \begin{macrocode}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{0400}{\@tabacckludge`\CYRE}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{0401}{\CYRYO}
+%<all,x2,t2a,ot2>\DeclareUnicodeCharacter{0402}{\CYRDJE}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{0403}{\@tabacckludge'\CYRG}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2a,ot2,lcy>\DeclareUnicodeCharacter{0404}{\CYRIE}
+%<all,x2,t2c,t2b,t2a,ot2>\DeclareUnicodeCharacter{0405}{\CYRDZE}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{0406}{\CYRII}
+%<all,x2,t2a,lcy>\DeclareUnicodeCharacter{0407}{\CYRYI}
+%<all,x2,t2c,t2b,t2a,ot2>\DeclareUnicodeCharacter{0408}{\CYRJE}
+%<all,x2,t2b,t2a,ot2>\DeclareUnicodeCharacter{0409}{\CYRLJE}
+%<all,x2,t2b,t2a,ot2>\DeclareUnicodeCharacter{040A}{\CYRNJE}
+%<all,x2,t2a,ot2>\DeclareUnicodeCharacter{040B}{\CYRTSHE}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{040C}{\@tabacckludge'\CYRK}
+\DeclareUnicodeCharacter{040D}{\@tabacckludge`\CYRI}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2b,t2a,lcy>\DeclareUnicodeCharacter{040E}{\CYRUSHRT}
+%<all,x2,t2c,t2a,ot2>\DeclareUnicodeCharacter{040F}{\CYRDZHE}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{0410}{\CYRA}
+\DeclareUnicodeCharacter{0411}{\CYRB}
+\DeclareUnicodeCharacter{0412}{\CYRV}
+\DeclareUnicodeCharacter{0413}{\CYRG}
+\DeclareUnicodeCharacter{0414}{\CYRD}
+\DeclareUnicodeCharacter{0415}{\CYRE}
+\DeclareUnicodeCharacter{0416}{\CYRZH}
+\DeclareUnicodeCharacter{0417}{\CYRZ}
+\DeclareUnicodeCharacter{0418}{\CYRI}
+\DeclareUnicodeCharacter{0419}{\CYRISHRT}
+\DeclareUnicodeCharacter{041A}{\CYRK}
+\DeclareUnicodeCharacter{041B}{\CYRL}
+\DeclareUnicodeCharacter{041C}{\CYRM}
+\DeclareUnicodeCharacter{041D}{\CYRN}
+\DeclareUnicodeCharacter{041E}{\CYRO}
+\DeclareUnicodeCharacter{041F}{\CYRP}
+\DeclareUnicodeCharacter{0420}{\CYRR}
+\DeclareUnicodeCharacter{0421}{\CYRS}
+\DeclareUnicodeCharacter{0422}{\CYRT}
+\DeclareUnicodeCharacter{0423}{\CYRU}
+\DeclareUnicodeCharacter{0424}{\CYRF}
+\DeclareUnicodeCharacter{0425}{\CYRH}
+\DeclareUnicodeCharacter{0426}{\CYRC}
+\DeclareUnicodeCharacter{0427}{\CYRCH}
+\DeclareUnicodeCharacter{0428}{\CYRSH}
+\DeclareUnicodeCharacter{0429}{\CYRSHCH}
+\DeclareUnicodeCharacter{042A}{\CYRHRDSN}
+\DeclareUnicodeCharacter{042B}{\CYRERY}
+\DeclareUnicodeCharacter{042C}{\CYRSFTSN}
+\DeclareUnicodeCharacter{042D}{\CYREREV}
+\DeclareUnicodeCharacter{042E}{\CYRYU}
+\DeclareUnicodeCharacter{042F}{\CYRYA}
+\DeclareUnicodeCharacter{0430}{\cyra}
+\DeclareUnicodeCharacter{0431}{\cyrb}
+\DeclareUnicodeCharacter{0432}{\cyrv}
+\DeclareUnicodeCharacter{0433}{\cyrg}
+\DeclareUnicodeCharacter{0434}{\cyrd}
+\DeclareUnicodeCharacter{0435}{\cyre}
+\DeclareUnicodeCharacter{0436}{\cyrzh}
+\DeclareUnicodeCharacter{0437}{\cyrz}
+\DeclareUnicodeCharacter{0438}{\cyri}
+\DeclareUnicodeCharacter{0439}{\cyrishrt}
+\DeclareUnicodeCharacter{043A}{\cyrk}
+\DeclareUnicodeCharacter{043B}{\cyrl}
+\DeclareUnicodeCharacter{043C}{\cyrm}
+\DeclareUnicodeCharacter{043D}{\cyrn}
+\DeclareUnicodeCharacter{043E}{\cyro}
+\DeclareUnicodeCharacter{043F}{\cyrp}
+\DeclareUnicodeCharacter{0440}{\cyrr}
+\DeclareUnicodeCharacter{0441}{\cyrs}
+\DeclareUnicodeCharacter{0442}{\cyrt}
+\DeclareUnicodeCharacter{0443}{\cyru}
+\DeclareUnicodeCharacter{0444}{\cyrf}
+\DeclareUnicodeCharacter{0445}{\cyrh}
+\DeclareUnicodeCharacter{0446}{\cyrc}
+\DeclareUnicodeCharacter{0447}{\cyrch}
+\DeclareUnicodeCharacter{0448}{\cyrsh}
+\DeclareUnicodeCharacter{0449}{\cyrshch}
+\DeclareUnicodeCharacter{044A}{\cyrhrdsn}
+\DeclareUnicodeCharacter{044B}{\cyrery}
+\DeclareUnicodeCharacter{044C}{\cyrsftsn}
+\DeclareUnicodeCharacter{044D}{\cyrerev}
+\DeclareUnicodeCharacter{044E}{\cyryu}
+\DeclareUnicodeCharacter{044F}{\cyrya}
+\DeclareUnicodeCharacter{0450}{\@tabacckludge`\cyre}
+\DeclareUnicodeCharacter{0451}{\cyryo}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2a,ot2>\DeclareUnicodeCharacter{0452}{\cyrdje}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{0453}{\@tabacckludge'\cyrg}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2a,ot2,lcy>\DeclareUnicodeCharacter{0454}{\cyrie}
+%<all,x2,t2c,t2b,t2a,ot2>\DeclareUnicodeCharacter{0455}{\cyrdze}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{0456}{\cyrii}
+%<all,x2,t2a,lcy>\DeclareUnicodeCharacter{0457}{\cyryi}
+%<all,x2,t2c,t2b,t2a,ot2>\DeclareUnicodeCharacter{0458}{\cyrje}
+%<all,x2,t2b,t2a,ot2>\DeclareUnicodeCharacter{0459}{\cyrlje}
+%<all,x2,t2b,t2a,ot2>\DeclareUnicodeCharacter{045A}{\cyrnje}
+%<all,x2,t2a,ot2>\DeclareUnicodeCharacter{045B}{\cyrtshe}
+%<*all,x2,t2c,t2b,t2a,ot2,lcy>
+\DeclareUnicodeCharacter{045C}{\@tabacckludge'\cyrk}
+\DeclareUnicodeCharacter{045D}{\@tabacckludge`\cyri}
+%</all,x2,t2c,t2b,t2a,ot2,lcy>
+%<all,x2,t2b,t2a,lcy>\DeclareUnicodeCharacter{045E}{\cyrushrt}
+%<all,x2,t2c,t2a,ot2>\DeclareUnicodeCharacter{045F}{\cyrdzhe}
+%<all,x2,ot2>\DeclareUnicodeCharacter{0462}{\CYRYAT}
+%<all,x2,ot2>\DeclareUnicodeCharacter{0463}{\cyryat}
+%<all,x2>\DeclareUnicodeCharacter{046A}{\CYRBYUS}
+%<all,x2>\DeclareUnicodeCharacter{046B}{\cyrbyus}
+%    \end{macrocode}
+%    The next two declarations are questionable, the encoding definition
+%    should probably contain |\CYROTLD| and |\cyrotld|. Or alternatively, if
+%    the characters in the X2 encodings are really meant to represent the
+%    historical characters in Ux0472 and Ux0473 (they look like them) then
+%    they would need to change instead.
+%
+%    However, their looks are probably a font designers decision and the next
+%    two mappings are wrong or rather the names in OT2 should change for
+%    consistency.
+%
+%    On the other hand the names |\CYROTLD| are somewhat questionabled as the
+%    Unicode standard only describes ``Cyrillic barred O'' while |TLD| refers
+%    to a tilde (which is more less what the ``Cyrillic FITA looks according
+%    to the Unicode book).
+%    \begin{macrocode}
+%<all,ot2>\DeclareUnicodeCharacter{0472}{\CYRFITA}
+%<all,ot2>\DeclareUnicodeCharacter{0473}{\cyrfita}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,x2,ot2>\DeclareUnicodeCharacter{0474}{\CYRIZH}
+%<all,x2,ot2>\DeclareUnicodeCharacter{0475}{\cyrizh}
+%    \end{macrocode}
+%    While the double grave accent seems to exist in X2, T2A, T2B and T2C
+%    encoding, the letter izhitsa exists only in X2 and OT2. Therefore,
+%    izhitsa with double grave seems to be possible only using X2.
+%    \begin{macrocode}
+%<all,x2>\DeclareUnicodeCharacter{0476}{\C\CYRIZH}
+%<all,x2>\DeclareUnicodeCharacter{0477}{\C\cyrizh}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,t2c>\DeclareUnicodeCharacter{048C}{\CYRSEMISFTSN}
+%<all,t2c>\DeclareUnicodeCharacter{048D}{\cyrsemisftsn}
+%<all,t2c>\DeclareUnicodeCharacter{048E}{\CYRRTICK}
+%<all,t2c>\DeclareUnicodeCharacter{048F}{\cyrrtick}
+%<all,x2,t2a,lcy>\DeclareUnicodeCharacter{0490}{\CYRGUP}
+%<all,x2,t2a,lcy>\DeclareUnicodeCharacter{0491}{\cyrgup}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{0492}{\CYRGHCRS}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{0493}{\cyrghcrs}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{0494}{\CYRGHK}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{0495}{\cyrghk}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{0496}{\CYRZHDSC}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{0497}{\cyrzhdsc}
+%<all,x2,t2a>\DeclareUnicodeCharacter{0498}{\CYRZDSC}
+%<all,x2,t2a>\DeclareUnicodeCharacter{0499}{\cyrzdsc}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{049A}{\CYRKDSC}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{049B}{\cyrkdsc}
+%<all,x2,t2a>\DeclareUnicodeCharacter{049C}{\CYRKVCRS}
+%<all,x2,t2a>\DeclareUnicodeCharacter{049D}{\cyrkvcrs}
+%<all,x2,t2c>\DeclareUnicodeCharacter{049E}{\CYRKHCRS}
+%<all,x2,t2c>\DeclareUnicodeCharacter{049F}{\cyrkhcrs}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04A0}{\CYRKBEAK}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04A1}{\cyrkbeak}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04A2}{\CYRNDSC}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04A3}{\cyrndsc}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{04A4}{\CYRNG}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{04A5}{\cyrng}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04A6}{\CYRPHK}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04A7}{\cyrphk}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04A8}{\CYRABHHA}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04A9}{\cyrabhha}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04AA}{\CYRSDSC}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04AB}{\cyrsdsc}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04AC}{\CYRTDSC}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04AD}{\cyrtdsc}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{04AE}{\CYRY}
+%<all,x2,t2b,t2a>\DeclareUnicodeCharacter{04AF}{\cyry}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04B0}{\CYRYHCRS}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04B1}{\cyryhcrs}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04B2}{\CYRHDSC}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04B3}{\cyrhdsc}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04B4}{\CYRTETSE}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04B5}{\cyrtetse}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04B6}{\CYRCHRDSC}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04B7}{\cyrchrdsc}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04B8}{\CYRCHVCRS}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04B9}{\cyrchvcrs}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04BA}{\CYRSHHA}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04BB}{\cyrshha}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04BC}{\CYRABHCH}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04BD}{\cyrabhch}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04BE}{\CYRABHCHDSC}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04BF}{\cyrabhchdsc}
+%    \end{macrocode}
+%    The character |\CYRpalochka| is not defined by OT2 and LCY. However it is
+%    looking identical to |\CYRII| and the Unicode standard explicitly refers
+%    to that (and to Latin I). So perhaps those encodings could get an alias?
+%    On the other hand, why are there two distinct slots in the T2 encodings
+%    even though they are so pressed for space? Perhaps they don't always look
+%    alike.
+%    \begin{macrocode}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04C0}{\CYRpalochka}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04C1}{\U\CYRZH}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04C2}{\U\cyrzh}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04C3}{\CYRKHK}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04C4}{\cyrkhk}
+%    \end{macrocode}
+%    According to the Unicode standard Ux04C5 should be an L with ``tail'' not
+%    with descender (which also exists as Ux04A2) but it looks as if the char
+%    names do not make this distinction). Should they?
+%    \begin{macrocode}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04C5}{\CYRLDSC}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04C6}{\cyrldsc}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04C7}{\CYRNHK}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04C8}{\cyrnhk}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04CB}{\CYRCHLDSC}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04CC}{\cyrchldsc}
+%    \end{macrocode}
+%    According to the Unicode standard Ux04CD should be an M with ``tail'' not
+%    with descender. However this time there is no M with descender in the
+%    Unicode standard.
+%    \begin{macrocode}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04CD}{\CYRMDSC}
+%<all,x2,t2c>\DeclareUnicodeCharacter{04CE}{\cyrmdsc}
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D0}{\U\CYRA}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D1}{\U\cyra}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D2}{\"\CYRA}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D3}{\"\cyra}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04D4}{\CYRAE}
+%<all,x2,t2a>\DeclareUnicodeCharacter{04D5}{\cyrae}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D6}{\U\CYRE}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04D7}{\U\cyre}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04D8}{\CYRSCHWA}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04D9}{\cyrschwa}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04DA}{\"\CYRSCHWA}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04DB}{\"\cyrschwa}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04DC}{\"\CYRZH}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04DD}{\"\cyrzh}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04DE}{\"\CYRZ}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04DF}{\"\cyrz}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04E0}{\CYRABHDZE}
+%<all,x2,t2c,t2b>\DeclareUnicodeCharacter{04E1}{\cyrabhdze}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E2}{\@tabacckludge=\CYRI}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E3}{\@tabacckludge=\cyri}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E4}{\"\CYRI}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E5}{\"\cyri}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E6}{\"\CYRO}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04E7}{\"\cyro}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04E8}{\CYROTLD}
+%<all,x2,t2c,t2b,t2a>\DeclareUnicodeCharacter{04E9}{\cyrotld}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04EC}{\"\CYREREV}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04ED}{\"\cyrerev}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04EE}{\@tabacckludge=\CYRU}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04EF}{\@tabacckludge=\cyru}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F0}{\"\CYRU}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F1}{\"\cyru}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F2}{\H\CYRU}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F3}{\H\cyru}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F4}{\"\CYRCH}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F5}{\"\cyrch}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04F6}{\CYRGDSC}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04F7}{\cyrgdsc}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F8}{\"\CYRERY}
+%<all,x2,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{04F9}{\"\cyrery}
+%<all,t2b>\DeclareUnicodeCharacter{04FA}{\CYRGDSCHCRS}
+%<all,t2b>\DeclareUnicodeCharacter{04FB}{\cyrgdschcrs}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04FC}{\CYRHHK}
+%<all,x2,t2b>\DeclareUnicodeCharacter{04FD}{\cyrhhk}
+%<all,t2b>\DeclareUnicodeCharacter{04FE}{\CYRHHCRS}
+%<all,t2b>\DeclareUnicodeCharacter{04FF}{\cyrhhcrs}
+%<all,ts1>\DeclareUnicodeCharacter{0E3F}{\textbaht}
+%<all,t1>\DeclareUnicodeCharacter{1E02}{\.B}
+%<all,t1>\DeclareUnicodeCharacter{1E03}{\.b}
+%<all,t1>\DeclareUnicodeCharacter{1E9E}{\SS}
+%<all,x2,t2c,t2b,t2a,t1,utf8>\DeclareUnicodeCharacter{200C}{\textcompwordmark}
+%    \end{macrocode}
+% \changes{v1.1s}{2016/02/28}{Add more hyphens and dashes}
+%    \begin{macrocode}
+%<all,t1>\DeclareUnicodeCharacter{2010}{-}
+%<all,t1>\DeclareUnicodeCharacter{2011}{\mbox{-}}
+%    \end{macrocode}
+% U+2012 should be the width of a digit, endash is OK in many fonts including cm.
+%    \begin{macrocode}
+%<all,t1>\DeclareUnicodeCharacter{2012}{\textendash}
+%<*all,x2,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>
+\DeclareUnicodeCharacter{2013}{\textendash}
+\DeclareUnicodeCharacter{2014}{\textemdash}
+%    \end{macrocode}
+% U+2015 is Horizontal bar
+%    \begin{macrocode}
+%<all,t1>\DeclareUnicodeCharacter{2015}{\textemdash}
+%</all,x2,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>
+%<all,ts1>\DeclareUnicodeCharacter{2016}{\textbardbl}
+%<*all,x2,t2c,t2b,t2a,t1,ot2,ot1,lcy>
+\DeclareUnicodeCharacter{2018}{\textquoteleft}
+\DeclareUnicodeCharacter{2019}{\textquoteright}
+%</all,x2,t2c,t2b,t2a,t1,ot2,ot1,lcy>
+%<all,t1>\DeclareUnicodeCharacter{201A}{\quotesinglbase}
+%<*all,x2,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>
+\DeclareUnicodeCharacter{201C}{\textquotedblleft}
+\DeclareUnicodeCharacter{201D}{\textquotedblright}
+%</all,x2,t2c,t2b,t2a,t1,ot2,ot1,ly1,lcy>
+%<all,x2,t2c,t2b,t2a,t1,lcy>\DeclareUnicodeCharacter{201E}{\quotedblbase}
+%<all,ts1,oms,ly1>\DeclareUnicodeCharacter{2020}{\textdagger}
+%<all,ts1,oms,ly1>\DeclareUnicodeCharacter{2021}{\textdaggerdbl}
+%<all,ts1,oms,ly1>\DeclareUnicodeCharacter{2022}{\textbullet}
+%<all,ly1,utf8>\DeclareUnicodeCharacter{2026}{\textellipsis}
+%<*all,x2,ts1,t2c,t2b,t2a,t1,ly1>
+\DeclareUnicodeCharacter{2030}{\textperthousand}
+%</all,x2,ts1,t2c,t2b,t2a,t1,ly1>
+%<*all,x2,ts1,t2c,t2b,t2a,t1>
+\DeclareUnicodeCharacter{2031}{\textpertenthousand}
+%</all,x2,ts1,t2c,t2b,t2a,t1>
+%<all,t1,ly1>\DeclareUnicodeCharacter{2039}{\guilsinglleft}
+%<all,t1,ly1>\DeclareUnicodeCharacter{203A}{\guilsinglright}
+%<all,ts1>\DeclareUnicodeCharacter{203B}{\textreferencemark}
+%<all,ts1>\DeclareUnicodeCharacter{203D}{\textinterrobang}
+%<all,ts1>\DeclareUnicodeCharacter{2044}{\textfractionsolidus}
+%<all,ts1>\DeclareUnicodeCharacter{204E}{\textasteriskcentered}
+%<all,ts1>\DeclareUnicodeCharacter{2052}{\textdiscount}
+%<all,ts1>\DeclareUnicodeCharacter{20A1}{\textcolonmonetary}
+%<all,ts1>\DeclareUnicodeCharacter{20A4}{\textlira}
+%<all,ts1>\DeclareUnicodeCharacter{20A6}{\textnaira}
+%<all,ts1>\DeclareUnicodeCharacter{20A9}{\textwon}
+%<all,ts1>\DeclareUnicodeCharacter{20AB}{\textdong}
+%<all,ts1>\DeclareUnicodeCharacter{20AC}{\texteuro}
+%<all,ts1>\DeclareUnicodeCharacter{20B1}{\textpeso}
+%<all,ts1>\DeclareUnicodeCharacter{2103}{\textcelsius}
+%<all,x2,ts1,t2c,t2b,t2a,ot2,lcy>\DeclareUnicodeCharacter{2116}{\textnumero}
+%<all,ts1>\DeclareUnicodeCharacter{2117}{\textcircledP}
+%<all,ts1>\DeclareUnicodeCharacter{211E}{\textrecipe}
+%<all,ts1>\DeclareUnicodeCharacter{2120}{\textservicemark}
+%<all,ts1,ly1,utf8>\DeclareUnicodeCharacter{2122}{\texttrademark}
+%<all,ts1>\DeclareUnicodeCharacter{2126}{\textohm}
+%<all,ts1>\DeclareUnicodeCharacter{2127}{\textmho}
+%<all,ts1>\DeclareUnicodeCharacter{212E}{\textestimated}
+%<all,ts1>\DeclareUnicodeCharacter{2190}{\textleftarrow}
+%<all,ts1>\DeclareUnicodeCharacter{2191}{\textuparrow}
+%<all,ts1>\DeclareUnicodeCharacter{2192}{\textrightarrow}
+%<all,ts1>\DeclareUnicodeCharacter{2193}{\textdownarrow}
+%<all,x2,ts1,t2c,t2b,t2a>\DeclareUnicodeCharacter{2329}{\textlangle}
+%<all,x2,ts1,t2c,t2b,t2a>\DeclareUnicodeCharacter{232A}{\textrangle}
+%<all,ts1>\DeclareUnicodeCharacter{2422}{\textblank}
+%<all,x2,t2c,t2b,t2a,t1,utf8>\DeclareUnicodeCharacter{2423}{\textvisiblespace}
+%<all,ts1>\DeclareUnicodeCharacter{25E6}{\textopenbullet}
+%<all,ts1>\DeclareUnicodeCharacter{25EF}{\textbigcircle}
+%<all,ts1>\DeclareUnicodeCharacter{266A}{\textmusicalnote}
+%<all,t1>\DeclareUnicodeCharacter{1E20}{\@tabacckludge=G}
+%<all,t1>\DeclareUnicodeCharacter{1E21}{\@tabacckludge=g}
+%    \end{macrocode}
+% \changes{v1.2c}{2018/04/05}{Add BOM}
+%    \begin{macrocode}
+%<all,ts1,utf8>\DeclareUnicodeCharacter{FEFF}{\ifhmode\nobreak\fi}
+%    \end{macrocode}
+% 
+% \endgroup
+% \subsection{Notes}
+%
+% \changes{v1.1e}{2004/05/22}{Added notes on inconsistency with `8-bit files'.}
+% The following inputs are inconsistent with the 8-bit inputenc files
+% since they will always only produce the `text character'.  This is an
+% area where inputenc is notoriously confused.
+% \begin{verbatim}
+% %<all,ts1,t1,ot1,ly1>\DeclareUnicodeCharacter{00A3}{\textsterling}
+% %<*all,x2,ts1,t2c,t2b,t2a,oms,ly1>
+% \DeclareUnicodeCharacter{00A7}{\textsection}
+% %</all,x2,ts1,t2c,t2b,t2a,oms,ly1>
+% %<all,ts1,utf8>\DeclareUnicodeCharacter{00A9}{\textcopyright}
+% %<all,ts1>\DeclareUnicodeCharacter{00B1}{\textpm}
+% %<all,ts1,oms,ly1>\DeclareUnicodeCharacter{00B6}{\textparagraph}
+% %<all,ts1,oms,ly1>\DeclareUnicodeCharacter{2020}{\textdagger}
+% %<all,ts1,oms,ly1>\DeclareUnicodeCharacter{2021}{\textdaggerdbl}
+% %<all,ly1,utf8>\DeclareUnicodeCharacter{2026}{\textellipsis}
+% \end{verbatim}
+%
+%    The following definitions are in an encoding file but have no
+%    direct equivalent in Unicode, or they simply do not make sense in that
+%    context (or we have not yet found anything or \ldots :-).  For
+%    example, the non-combining accent characters are certainly
+%    available somewhere but these are not equivalent to a \TeX{}
+%    accent command.
+%\begin{verbatim}
+%\DeclareTextSymbol{\j}{OT1}{17}
+%\DeclareTextSymbol{\SS}{T1}{223}
+%\DeclareTextSymbol{\textcompwordmark}{T1}{23}
+%
+%\DeclareTextAccent{\"}{OT1}{127}
+%\DeclareTextAccent{\'}{OT1}{19}
+%\DeclareTextAccent{\.}{OT1}{95}
+%\DeclareTextAccent{\=}{OT1}{22}
+%\DeclareTextAccent{\H}{OT1}{125}
+%\DeclareTextAccent{\^}{OT1}{94}
+%\DeclareTextAccent{\`}{OT1}{18}
+%\DeclareTextAccent{\r}{OT1}{23}
+%\DeclareTextAccent{\u}{OT1}{21}
+%\DeclareTextAccent{\v}{OT1}{20}
+%\DeclareTextAccent{\~}{OT1}{126}
+%\DeclareTextCommand{\b}{OT1}[1]
+%\DeclareTextCommand{\c}{OT1}[1]
+%\DeclareTextCommand{\d}{OT1}[1]
+%\DeclareTextCommand{\k}{T1}[1]
+%\end{verbatim}
+%
+%
+%
+% \subsection{Mappings for OT1 glyphs}
+%
+%    This is even more incomplete as again it covers only the single
+%    glyphs from |OT1| plus some that have been explicitly defined for
+%    this encoding. Everything that is provided in |T1|, and that
+%    could be provided as composite glyphs via |OT1|, could and
+%    probably should be set up as well.  Which leaves the many things
+%    that are not provided in |T1| but can be provided in |OT1| (and
+%    in |T1|) by composite glyphs.
+%
+% Stuff not mapped (note that |\j| ($\jmath$) is not equivalent to any
+% Unicode character):
+%\begin{verbatim}
+%\DeclareTextSymbol{\j}{OT1}{17}
+%\DeclareTextAccent{\"}{OT1}{127}
+%\DeclareTextAccent{\'}{OT1}{19}
+%\DeclareTextAccent{\.}{OT1}{95}
+%\DeclareTextAccent{\=}{OT1}{22}
+%\DeclareTextAccent{\^}{OT1}{94}
+%\DeclareTextAccent{\`}{OT1}{18}
+%\DeclareTextAccent{\~}{OT1}{126}
+%\DeclareTextAccent{\H}{OT1}{125}
+%\DeclareTextAccent{\u}{OT1}{21}
+%\DeclareTextAccent{\v}{OT1}{20}
+%\DeclareTextAccent{\r}{OT1}{23}
+%\DeclareTextCommand{\b}{OT1}[1]
+%\DeclareTextCommand{\c}{OT1}[1]
+%\DeclareTextCommand{\d}{OT1}[1]
+%\end{verbatim}
+%
+%
+%
+% \subsection{Mappings for OMS glyphs}
+%
+% Characters like |\textbackslash| are not mapped as they are
+%    (primarily) only in the lower 127 and the code here only sets up
+%    mappings for UTF-8 characters that are at least 2 octets long.
+%\begin{verbatim}
+%\DeclareTextSymbol{\textbackslash}{OMS}{110}        % "6E
+%\DeclareTextSymbol{\textbar}{OMS}{106}              % "6A
+%\DeclareTextSymbol{\textbraceleft}{OMS}{102}        % "66
+%\DeclareTextSymbol{\textbraceright}{OMS}{103}       % "67
+%\end{verbatim}
+%
+% But the following (and some others) might actually lurk in Unicode
+%    somewhere\ldots
+%\begin{verbatim}
+%\DeclareTextSymbol{\textasteriskcentered}{OMS}{3}   % "03
+%\DeclareTextCommand{\textcircled}{OMS}
+%\end{verbatim}
+%
+%
+%
+%
+% \subsection{Mappings for TS1 glyphs}
+%
+% Exercise for somebody else.
+%
+%
+% \subsection{Mappings for \texttt{latex.ltx} glyphs}
+%
+% There is also a collection of characters already set up in the kernel,
+% one way or the other. Since these do not clearly relate to any
+%    particular font encoding they are mapped when the
+% \texttt{utf8} support is first set up.
+%
+% Also there are a number of |\providecommand|s in the various input
+% encoding files which may or may not go into this part.
+% \changes{v1.1b}{2004/02/09}{Added commands already defined in the kernel}
+%    \begin{macrocode}
+%<*utf8>
+% This space is intentionally empty ...
+%</utf8>
+%    \end{macrocode}
+%
+%
+% \section{A test document}
+%
+%    Here is a very small test document which may or may not survive
+%    if the current document is transferred from one place to the
+%    other.
+%    \begin{macrocode}
+%<*test>
+\documentclass{article}
+
+\usepackage[latin1,utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{trace}
+
+\scrollmode  % to run past the error below
+
+\begin{document}
+
+ German umlauts in UTF-8: ^^c3^^a4^^c3^^b6^^c3^^bc  %%% äöü
+
+\inputencoding{latin1}  % switch to latin1
+
+ German umlauts in UTF-8 but read by latin1 (and will produce one
+ error since \verb=\textcurrency= is not provided):
+ ^^c3^^a4^^c3^^b6^^c3^^bc
+
+\inputencoding{utf8}    % switch back to utf8
+
+ German umlauts in UTF-8: ^^c3^^a4^^c3^^b6^^c3^^bc
+
+
+Some codes that should produce errors as nothing is set up
+for them: ^^c3F ^^e1^^a4^^b6
+
+And some that are not legal utf8 sequences: ^^c3X ^^e1XY
+
+\showoutput
+\tracingstats=2
+\stop
+%</test>
+%    \end{macrocode}
+%
+% \Finale
+%
+\endinput