macros2e (25jul11)

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+%&pdflatex
+% $Id: macros2e.tex 2521 2011-07-23 19:14:33Z martin $
+\documentclass[12pt,a4paper]{article}
+\usepackage[margin=1in]{geometry}
+\usepackage{ydoc-desc}[2010/02/16]
+\usepackage{newverbs}
+\MakeShortVerb\|
+\def\q#1{`#1'}
+\def\qq#1{``#1''}
+\MakeSpecialShortVerb\qverb\"
+\AtBeginDocument{\MakeShortMacroArgs*\`}
+\AtEndDocument{\DeleteShortMacroArgs\`}
+
+\usepackage{hyperref}
+\usepackage{xcolor}
+\hypersetup{filecolor=macrodesc}
+
+\usepackage{booktabs}
+\usepackage{tabularx}
+\usepackage{multicol}
+
+\usepackage{zref-user}
+\usepackage{zref-abspos}
+\usepackage{zref-xr}
+\usepackage{graphicx}
+
+% Relative position of `source2e` without extension
+\def\sourceIIe{/usr/local/texlive/2010/texmf-dist/doc/latex/base/source2e}
+%source2e}
+
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+% Bug-fix for missing declaration:
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+
+% Redefine the format of macro names to link to 'source2e':
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+    \escapechar\m@ne
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+% Load the external references
+%\zexternaldocument{\sourceIIe}
+
+\title{List of internal \LaTeX2e Macros useful to Package Authors}
+\author{Compiled by Martin Scharrer\\\url{martin@scharrer-online.de}}
+\date{Version 0.4 -- July 23rd 2011}
+
+\setlength{\descindent}{0pt}
+\setlength{\parindent}{0pt}
+\makeatletter
+\begin{document}
+\maketitle
+\begin{abstract}
+This document lists the internal macros defined by the \LaTeX2e base files which can be also useful
+to package authors.  The macros are hyper-linked to their description in \emph{source2e}.
+For this to work both PDFs must be inside the same directory.
+
+This document is not yet complete in content and format and may miss some macros. 
+\end{abstract}
+
+\begin{multicols}{2}
+\tableofcontents
+\end{multicols}
+
+\clearpage
+
+\section{Constants}
+
+\subsection{Number Constants}
+
+Some of the following integer values are defined using `\countdef` (for $-1$),
+`\chardef` (for values between 0--255) and `\mathchardef` ($>255$).  They are
+robust and do not expand in an `\edef` context. When used on the right side of an
+assignment the act the same way as a count register.  The `\m@ne` is a real count register and can
+still be modified, but doing so would certainly break various code.  In the terms defined by
+\emph{The TeXbook}, this integer constants yield \emph{internal integers} rather than \emph{integer
+denotations}.
+
+The other numbers are defined as normal macros, which will simply expand to the containing number.
+They were defined
+to be used to set font sizes, which explains the non-integer numbers.  Please note that if they
+are used for an assignment or other numeric context (e.g.\ |\ifnum|) TeX will keep expanding the
+following tokens until a non-numeric token is found.%, e.g.\ a space or |\relax|.
+
+
+\bigskip
+\noindent\hbox to \linewidth\bgroup\hss
+\begin{tabular}{lrl}
+  \toprule
+         Macro     & Value & Defined using \\
+  \midrule
+   \Macro\@ne      &     1 & chardef \\
+   \Macro\tw@      &     2 & chardef \\
+   \Macro\thr@@    &     3 & chardef \\
+   \Macro\sixt@@n  &    16 & chardef \\
+   \Macro\@xxxii   &    32 & chardef \\
+   \Macro\@cclv    &   255 & chardef \\
+   \Macro\@cclvi   &   256 & mathchardef \\
+   \Macro\@m       &  1000 & mathchardef \\
+   \Macro\@M       & 10000 & mathchardef \\
+   \Macro\@Mi      & 10001 & mathchardef \\
+   \Macro\@Mii     & 10002 & mathchardef \\
+   \Macro\@Miii    & 10003 & mathchardef \\
+   \Macro\@Miv     & 10004 & mathchardef \\
+   \Macro\@MM      & 20000 & mathchardef \\
+  \bottomrule
+\end{tabular}
+\hss
+\begin{tabular}{lrl}
+  \toprule
+         Macro     & Value & Defined using \\
+  \midrule
+   \Macro\@vpt     &     5 & def \\
+   \Macro\@vipt    &     6 & def \\
+   \Macro\@viipt   &     7 & def \\
+   \Macro\@viiipt  &     8 & def \\
+   \Macro\@ixpt    &     9 & def \\
+   \Macro\@xpt     &    10 & def \\
+   \Macro\@xipt    & 10.95 & def \\
+   \Macro\@xiipt   &    12 & def \\
+   \Macro\@xivpt   &  14.4 & def \\
+   \Macro\@xviipt  & 17.28 & def \\
+   \Macro\@xxpt    & 20.74 & def \\
+   \Macro\@xxvpt   & 24.88 & def \\
+  \\%\midrule
+   \Macro\m@ne     &  $-1$ & countdef \\
+  \bottomrule
+\end{tabular}%
+\hss\egroup
+
+
+\subsection{Dimension Constants}
+The following dimension and skip constants are defined using registers. They must not be changed.
+
+\begin{center}
+\begin{tabularx}{\linewidth}{lrlX}
+  \toprule
+    Macro           & Value         & Defined using & Notes \\
+  \midrule
+    \Macro\p@       & 1pt           & newdimen      & Can be used as a replacement of pt behind a number due to the resulting multiplication \\
+    \Macro\z@       & 0pt           & newdimen      & Can be used both for 0pt and 0 \\
+    \Macro\maxdimen & 16383.99999pt & newdimen      & Largest valid dimension \\
+  \bottomrule
+\end{tabularx}
+\par\medskip
+\begin{tabularx}{\linewidth}{lrlX}
+  \toprule
+    Macro             & Value                 & Defined using & Notes\\
+    \midrule
+    \Macro\z@skip     & 0pt plust0pt minus0pt & newskip       & \\
+    \Macro\hideskip   & $-1000$pt plus 1fill    & newskip       & negative but can grow \\
+    \Macro\@flushglue & 0pt plus 1fil         & newskip       & \\
+  \bottomrule
+\end{tabularx}
+\end{center}
+
+\subsection{String Constants}
+The following macros hold common strings and are fully expandable.
+Some special characters are defined here as their verbatim ASCII representation.
+This makes them useful if such characters are to be written into an auxiliary file.
+
+\bigskip\noindent
+\begin{tabularx}{\linewidth}{llX}
+  \toprule
+    Macro                 & Value                        & Note\\
+  \midrule
+    \Macro\space          & One space                    & An explicit space (catcode 10 \qq{space}).\\
+    \Macro\@spaces        & Four spaces                  & Contains $4\times$\Macro\space.\\
+    \Macro\empty          & Empty string                 & Commonly used to define empty macros using \Macro\let. \\
+    \Macro\@empty         & Empty string                 & Same as above. Used by the \LaTeX{} kernel commands. \\
+    \Macro\@backslashchar & \qq{\texttt{\@backslashchar}} & Backslash with catcode 12 (other), i.e. simple ASCII backlash usable in e.g.\ \Macro\write.\\
+    \Macro\@percentchar   & \qq{\texttt{\@percentchar}}   & Percent character with catcode 12 (other), i.e. simple ASCII percent usable in e.g.\ \Macro\write.\\
+    \Macro\@charlb        & \qq{\texttt{\@charlb}}        & Left brace with catcode 11 (letter). \\
+    \Macro\@charrb        & \qq{\texttt{\@charrb}}        & Right brace with catcode 11 (letter). \\
+    \Macro\@clsextension  & \qq{\texttt{cls}}             & Used for comparison with \Macro\@currext. \\
+    \Macro\@pkgextension  & \qq{\texttt{sty}}             & Used for comparison with \Macro\@currext. \\
+    \Macro\@depth         & \qq{\texttt{depth}}           & Used for box size declarations (\Macro\hb@xt@).\\
+    \Macro\@height        & \qq{\texttt{height}}          & Used for box size declarations.\\
+    \Macro\@width         & \qq{\texttt{width}}           & Used for box size declarations.\\
+    \Macro\@minus         & \qq{\texttt{minus}}           & Used for skip declarations.\\
+    \Macro\@plus          & \qq{\texttt{plus}}            & Used for skip declarations.\\
+  \bottomrule
+\end{tabularx}
+
+\subsection{Token Constants}
+The following macros are defined using \Macro\let<macro>'='<token> and therefore equal to this token. They are useful for |\ifx| comparisons
+with tokens read by |\let| or |\futurelet|.
+
+\bigskip\noindent
+\begin{tabular}{llll}
+ \toprule
+   Name & Token & Catcode & Note \\
+ \midrule
+   \Macro\@sptoken & Space & 10 & Should not be confused with \Macro\space \\ 
+   \Macro\bgroup   & |{|   &  1 & Begin of group \\
+   \Macro\egroup   & |}|   &  2 & End of group \\
+ \bottomrule
+\end{tabular}
+
+\subsection{Other}
+
+\begin{tabularx}{\linewidth}{lllX}
+  \toprule
+    Macro            & Value   & Defined using & Notes \\
+  \midrule
+   \Macro\voidb@x    & (void)  & newbox        & permanently void box register \\
+   \Macro\@undefined & (undef) & (undefined)   & This macro is not defined.
+       It is used to test if other macros are undefined (using \Macro\ifx) or set them to an undefined state (using \Macro\let).\\
+  \bottomrule
+\end{tabularx}
+
+
+\clearpage
+\section{Variables}
+
+\subsection{Temporary Variables}
+The following variables are defined and used by the \LaTeX{} kernel commands as scratch registers and macros.
+They can be used with care, but should only be redefined inside a local group to avoid interference with other
+code. Care must also be taken if they are used together with external macros, which might use them as well
+-- maybe not yet but in the next release.
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{llX}
+  \toprule
+  Temp variable      & Type              & Note \\
+  \midrule
+  \Macro\count@      & counter           & \\
+  \Macro\@tempcnta   & counter           & \\
+  \Macro\@tempcntb   & counter           & \\
+  \Macro\dimen@      & dimension         & \\
+  \Macro\dimen@i     & dimension         & Marked as \qq{global only} \\
+  \Macro\dimen@ii    & dimension         & \\
+  \Macro\@tempdima   & dimension \\
+  \Macro\@tempdimb   & dimension \\
+  \Macro\@tempdimc   & dimension \\
+  \Macro\@tempa      & macro \\
+  \Macro\@tempb      & macro \\
+  \Macro\@tempc      & macro \\
+  \Macro\@gtempa     & macro             & For temporary definitions which must be made global\\
+  \Macro\skip@       & skip              & \\
+  \Macro\@tempskipa  & skip \\
+  \Macro\@tempskipb  & skip \\
+  \Macro\toks@       & token register    & \\
+  \Macro\@temptokena & token register \\
+  \Macro\if@tempswa  & if switch         & Comes with the usual setters \Macro\@tempswatrue and \Macro\@tempswafalse \\
+  \Macro\@tempboxa   & box register \\
+  \Macro\@let@token  & \q{let}  & Used by \Macro\@ifnextchar to temporary store the next token using \Macro\futurelet. Can be used for similar purposes. \\
+  \bottomrule
+\end{tabularx}
+
+
+\subsection{Dimension Variables}
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\@wholewidth & 
+   This |dimen| register holds the half line width (thickness) in \env{picture} environments. \\
+   \Macro\@halfwidth  &
+   This |dimen| register hold the full line width (thickness) in \env{picture} environments. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{String and Other Variables}
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\@currext   & Extension of the current package or class file, empty outside. \\
+   \Macro\@currname  & File name base of the current package or class file, empty outside. \\
+   \Macro\@currenvir & Name of the current environment. \\
+   \Macro\@currenvline  & Line number of the begin of the current environment \\
+   \Macro\@currentlabel  &  The value a \Macro\label will point to. Set by \Macro\stepcounter and \Macro\refstepcounter. \\
+   \bottomrule
+\end{tabularx}
+
+
+\section{Macros}
+
+\subsection{Macro Definition}
+\DescribeMacro\@namedef{<name>}<parameter list>{<definition>}
+\noindent
+Defines macro \MacroArgs'\'<name>\relax using \Macro\def. Can be prefixed with \Macro\long and \Macro\global.
+
+\DescribeMacro\@nameuse{<name>}
+\noindent
+Expands to macro \MacroArgs'\'<name>.
+
+\DescribeMacro\@ifnextchar<token>{<yes>}{<no>}
+\noindent
+Tests if next non-space token is equal to \MacroArgs<token>. 
+
+\DescribeMacro\@ifstar{<yes>}{<no>}
+\noindent
+Tests of next non-space token is "*". Removes star for \MacroArgs<yes> branch.   
+
+\DescribeMacro\@dblarg{<cmd>}{<arg>}
+\noindent
+Expands to \MacroArgs<cmd>[<arg>]{<arg>}. 
+
+\DescribeMacro\@ifundefined{<name>}{<yes>}{<no>}
+\noindent
+Tests if \MacroArgs!\@backslashchar!<name> is defined (and not equal to \Macro\relax). 
+
+\DescribeMacro\@ifdefinable'\'<name>{<yes>}
+\noindent
+Tests if \MacroArgs'\'<name> is undefined, \MacroArgs<name> not "relax"
+and doesn't start with "end", and if \Macro{end}<name> is not defined. 
+
+\DescribeMacro\@onlypreamble<macro>
+\noindent
+The given \meta{macro} is marked as only be valid in the preamble. It will be redefined as an error message AtBeginDocument.
+
+\DescribeMacro\@star@or@long
+\noindent
+Tests for a following "*", if found \Macro\l@ngrel@x will be let to \Macro\relax, but \Macro\long
+otherwise. It can the be used before \Macro\def as an potential prefix.
+
+\DescribeMacro\@testopt{<1>}{<2>} 
+\noindent
+Short for \Macro\@ifnextchar'['{<1>}{<1>[{<2>}]}, i.e.\ \meta{2} will be used as default argument if non was given. 
+
+\DescribeMacro\@protected@testopt
+\noindent
+Robust version of \Macro\@testopt? 
+
+\DescribeMacro\addto@hook<token register>{<code>}
+\noindent
+Appends code to the token register. 
+
+\DescribeMacro\g@addto@macro<macro>{<code>}
+\noindent
+Appends \meta{code} to the definition of \MacroArgs<macro>.\\
+
+\subsection{Expanding/Gobbling Arguments}
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\@gobble{<arg>} & Removes (gobbles) its argument. (long)\\
+   \Macro\@gobbletwo{<arg 1>}{<arg 2>} & Removes (gobbles) two arguments. (long)\\
+   \Macro\@gobblefour{<1>}{<2>}{<3>}{<4>} & Removes (gobbles) four arguments. (long)\\
+   \Macro\@gobblecr & Gobbles a following carriage return, ignores spaces otherwise \\
+   \Macro\@firstofone{<arg>} & Expands to \meta{arg}, i.e. is used to remove braces. (long)\\
+   \Macro\@iden{<arg>} & Identity. Same as \Macro\@firstofone for compatibility reasons. (long)\\
+   \Macro\@firstoftwo{<1>}{<2>}  & Expands to \meta{1}, discards \meta{2}. (long)\\
+   \Macro\@secondoftwo{<1>}{<2>} & Expands to \meta{2}, discards \meta{1}. (long)\\
+   \Macro\@thirdofthree{<1>}{<2>}{<3>} & Expands to \meta{3}, discards \meta{1} and \meta{2}. (long)\\
+   \Macro\@expandtwoargs\AlsoMacro\macro{<1>}{<2>} & Expands the two arguments using \Macro\edef and feeds it to \Macro\macro.\\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Lists}
+
+\DescribeMacro\in@{<1>}{<2>}
+Checks if first argument occurs in the second and sets the switch \Macro\ifin@ accordantly.
+The arguments are not expanded. This must be done beforehand.
+
+\DescribeMacro\@removeelement{<element>}{<list>}{<cs>}
+Removes an element from a comma-separated list and puts it into a control sequence.
+
+\subsection{Loops}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\loop' ... '\AlsoMacro\iterate' ... '\AlsoMacro\repeat & \\
+   \Macro\@whilenum <test>  \AlsoMacro\do {<body>}  &  While loop with \Macro\ifnum test.  \\
+   \Macro\@whiledim <test>  \AlsoMacro\do {<body>}  &  While loop with \Macro\ifdim test.  \\
+   \Macro\@whilesw <switch> \AlsoMacro\fi {<body>}  &  While loop with \MacroArgs<switch> test.  \\
+   \Macro\@for<macro>':='<list>\AlsoMacro\do{<body>} & For loop. The \MacroArgs<list> is supposed to expand to a comma separated list.
+        Defines \MacroArgs<macro> to each element of the list and executes \meta{body} each time.
+        Supports an empty lists without errors. \\
+   \Macro\@tfor<macro>':='<list>\AlsoMacro\do{<body>} & For loop. The \MacroArgs<list> is not expanded and taken as a list of tokens or \MacroArgs{...}.
+        Defines \MacroArgs<macro> to each element of the list and executes \meta{body} each time.
+        Supports an empty lists without errors. \\
+   \Macro\@break@tfor & Break out of a \Macro\@tfor loop. This should be called \emph{inside} the scope of an \Macro\fi.\\
+   \bottomrule
+\end{tabularx}
+\par\bigskip\noindent
+NOTES:\par\vspace{-1ex}
+\begin{enumerate}\itemsep=0pt
+ \item These macros use no |\@temp| sequences.
+ \item These macros do not work if the body contains anything that
+looks syntactically to TeX like an improperly balanced |\if \else \fi|.
+\end{enumerate}
+
+\subsection{Colors}
+The following macros are defined equal to |\relax| by LaTeX2e as placeholder for the
+real code added by the \pkg{color} or \pkg{xcolor} package.
+They are needed to handle colors inside saved boxes correctly.
+See the definitions of \Macro\sbox for an example.
+
+\begin{tabularx}{\linewidth}{lX}
+  \toprule
+    Macro & Definition given by \pkg{color} \\
+  \midrule
+    \Macro\color@begingroup & \leavevmode\Macro\begingroup \\
+    \Macro\color@endgroup   & \leavevmode\Macro\endgroup \\
+    \Macro\color@setgroup   & \leavevmode\Macro\begingroup\AlsoMacro\set@color \\
+    \Macro\color@hbox       & \leavevmode\Macro\hbox\AlsoMacro\bgroup\AlsoMacro\color@begingroup \\
+    \Macro\color@vbox       & \leavevmode\Macro\vbox\AlsoMacro\bgroup\AlsoMacro\color@begingroup \\
+    \Macro\color@endbox     & \leavevmode\Macro\color@endgroup\AlsoMacro\egroup \\
+  \bottomrule
+\end{tabularx}
+
+\subsection{Auxiliary Macros}
+
+This auxiliary macros were originally defined to handle font changes but can be used for other code as well.
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\ifnot@nil{<1>}{<2>} & Checks if \meta{1} is the token \Macro\@nil. If so gobbles \meta{2} 
+   otherwise uses \Macro\@firstofone to remove the braces around \meta{2}.\\
+   \Macro\@nil  & This macro is undefined on purpose and used as endmarker in loops and other macros which process token lists. \\
+   \Macro\@nnil & Definition contains only \Macro\@nil and is used beside others to test for the presents of \Macro\@nil in \Macro\ifnot@nil. Is also used as endmarker.\\
+   \Macro\remove@to@nnil & Removes everything behind it until and including \Macro\@nnil.\\
+   \Macro\remove@star & Removes everything behind it until and including *.\\
+   \Macro\zap@space<text>!\verb*+ +!\AlsoMacro\@empty & Removes all spaces from \meta{text}. Expandable. \\
+   \Macro\strip@prefix & Removes everything up to and including to the next \texttt{>}. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Catcodes}
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+  \toprule
+  Name   &   Description    \\
+  \midrule
+   \Macro\strip@prefix & Removes everything up to and including to the next \texttt{>}. \\
+   \Macro\@makeother{<letter>} & Changes the catcode of the letter to \q{other} (12). Special letters must be escaped with a backslash. \\
+   \Macro\@sanitize & Changes catcodes of everything except braces to \q{other} (12).\\
+   \Macro\@onelevel@sanitize<macro> & Sanitizes \meta{macro}, turns it definition into verbatim code. Resulting characters except spaces are in catcode \q{other} (12)! Uses \Macro\meaning and \Macro\strip@prefix. (With $\epsilon$-\TeX\ many applications can be replaced by \Macro\detokenize{<content>}.)  \\
+ \bottomrule
+\end{tabularx}
+
+
+\subsection{Messages}
+\DescribeMacro\MessageBreak
+\noindent
+Inside a message this macro create a new line followed by a continuation text. Outside it is equal to |\relax|.
+
+\DescribeMacro\GenericInfo{<continuation>}{<message>}
+\noindent
+Prints \meta{message} to a log file. An included \Macro\MessageBreak\relax will cause a new line which start with \meta{continuation}.
+
+\DescribeMacros
+  \hbox{\Macro\GenericError{<continuation>}{<error message>}}%
+  \hbox{\phantom{\ttfamily\textbackslash GenericError}\MacroArgs{<where to go for further information>}{<help text>}}%
+\endDescribeMacros
+\noindent
+Print error message to log file followed by the \q{further information} line.
+The help text is displayed if the user presses "h".
+
+\DescribeMacro\wlog{<log message>}
+\noindent
+Write on log file only.
+
+\subsection{Dimensions, Length and Skips}
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{lX}
+  \toprule
+  Name   &   Description    \\
+  \midrule
+   \Macro\@settopoint<register>   & Rounds register to whole number of points. \\
+   \Macro\rem@pt<dimension value> & Awaits a value dimension value (\MacroArgs<int>'.'<frac>'pt') as string where the "pt" is removed. If \meta{frac} is numerical equal to 0, then it and the decimal dot are removed as well. \\
+   \Macro\strip@pt<dimension>     & Expands dimension using \cs{the} and strips the "pt" using \Macro\rem@pt. \\
+   \Macro\@killglue & 
+   Removes (|\unskip|s) the last and then all further skips (|\lastskip|) till one with a size of zero is reached. \\
+ \bottomrule
+\end{tabularx}
+
+\DescribeMacro\@defaultunits
+\noindent
+Used to provide a default unit for |dimen| or |skip| assignment.\\
+Usage: |\@defaultunits\dimen=#1pt\relax\@nnil|.
+Other units can be used instead of "pt".
+
+\subsection{Class and Package Options}
+
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+    \Macro\@classoptionslist & List of options of the main class. \\
+    \Macro\@unusedoptionlist & List of options to the main class that haven't been declared. \\
+    \Macro\@declaredoptions & Comma separated list of the options declared by the current package or class.
+    The list is in the order in which the options were declared. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Files}
+
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\if@filesw & If false the package should not be produce or write to output files. Set to false by \cs{nofiles}.\\
+   \Macro\if@partsw & \\
+   \Macro\@currdir  & Holds the current directory, e.g. "./" in an Unix OS. \\
+   \Macro\input@path & List of input paths. Each path should be enclosed in braces with no delimiters between paths. \\
+   \Macro\@filelist & The comma separated list of all files read so far. Only active if \cs{listfiles} is used in the preamble. \\
+   \Macro\@inputcheck&  Input file handle to check for the existence of the file.\\
+   \Macro\@unused    &  Output file handle used to reserve the standard output. Used in \Macro\typeout to write to the terminal.\\
+   \Macro\@mainaux   &  Output file handle for the main |aux| file.\\
+   \Macro\@partaux   &  Output file handle for include file |aux| files.\\
+   \Macro\@auxout    &  Let to \Macro\@partaux inside include files, but to \Macro\@mainaux otherwise.\\
+   \Macro\@partlist  &  Holds the comma-separated list defined by \Macro\includeonly. \\
+   \Macro\@pushfilename & pushes file name, extension and current catcode of "@" onto the file stack. \\
+   \Macro\@popfilename  & pushes file name, extension and current catcode of "@" onto the file stack. \\
+   \Macro\@currnamestack & file name stack.\\
+   \bottomrule
+\end{tabularx}
+
+
+\DescribeMacro\filename@parse{<filename>}
+\noindent
+Parses \meta{filename} and provides its directory, name base and extension in \Macro\filename@area,
+\Macro\filename@base and \Macro\filename@ext. The latter is let to \Macro\relax if it does not
+exists.
+
+\DescribeMacro\@filef@und
+The macro \Macro\IfFileExists (which is used by \Macro\InputIfFileExists) stores the found file followed by a space in this macro.
+
+\DescribeMacro\@starttoc{<ext>}
+\noindent
+Reads the file with the given extension (\texttt{\string\jobname.}\meta{ext}) and opens it for
+writing afterwards. The file is initially empty. Creates the output file handle \Macro\tf@<ext>.
+
+\DescribeMacro\@writefile{<ext>}{<code>}
+\noindent
+Writes code using the output handle \Macro\tf@<ext> if it exists.
+
+
+\DescribeMacro\@iffileonpath{<filename>}
+\noindent
+Check if given file is found by \TeX{} directly or in any of the directories given by \cs{input@path}. 
+
+\DescribeMacro\@obsoletefile{<new>}{<obsolete>}
+\noindent
+Prints warning message (only) that now a different file is used a input.
+
+\DescribeMacro\@addtofilelist{<filename>}
+\noindent
+Adds the given filename to the list of files. Only active if \cs{listfiles} is used in the preamble. 
+
+\DescribeMacro\@ptionlist{<filename>}
+\noindent
+Expands the option list of package, class or file given by full filename. 
+
+\DescribeMacro\@ifpackageloaded{<package>}{<true>}{<false>}
+\DescribeMacro\@ifclassloaded{<class>}{<true>}{<false>}
+\DescribeMacro\@ifl@aded{<extension>}{<file base>}{<true>}{<false>}
+Tests if given package/class/file has been loaded.
+
+
+\DescribeMacros
+\Macro\@ifpackagewith{<name>}{<option-list>}{<true>}{<false>}
+\Macro\@ifclasswith{<name>}{<option-list>}{<true>}{<false>}
+\Macro\@if@ptions{<extension>}{<name>}{<option-list>}{<true>}{<false>}
+\endDescribeMacros
+\noindent
+Tests if given package/class/file has been loaded with the given options.
+
+\DescribeMacros
+\Macro\@ifpackagelater{<name>}{<date YYYY/MM/DD>}{<true>}{<false>}
+\Macro\@ifclasslater{<name>}{<date YYYY/MM/DD>}{<true>}{<false>}
+\Macro\@ifl@ter{<extension>}{<file base>}{<date YYYY/MM/DD>}{<true>}{<false>}
+\endDescribeMacros
+\noindent
+Tests if given package/class/file has been loaded with a version more recent than \meta{version}.
+
+
+\subsection{Saved plain\TeX{} primitives}
+The following plain\TeX{} macros are redefined by \LaTeX{} and therefore saved away first:
+
+\par\bigskip\noindent
+\begin{tabularx}{\linewidth}{llX}
+   \toprule
+   \LaTeX{} Macro             & plain\TeX{} original & Description/Note \\
+   \midrule
+   \Macro\@@par               & \Macro{par}          & Some \LaTeX{} environments redefine \Macro{par} locally \\
+   \Macro\@@input             & \Macro\input         & Syntax: \Macro\input~<filename> \\
+   \Macro\@@end               & \Macro{end}          & \\
+   \Macro\@@underline         & \Macro\underline     & \\
+   \Macro\frozen@everymath    & \Macro\everymath     & \\
+   \Macro\frozen@everydisplay & \Macro\everydisplay  & \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Fonts}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+    \Macro\f@encoding     & Holds the current font encoding. \\
+    \Macro\f@family       & Holds the current font family. \\
+    \Macro\f@series       & Holds the current font series. \\
+    \Macro\f@shape        & Holds the current font shape. \\
+    \Macro\f@size         & Holds the current font size (in pt but without unit). \\
+    \Macro\f@baselineskip & Holds the current baseline skip (in pt but without unit). \\
+    \Macro\f@linespread   & Holds the current internal value for \Macro\baselinestretch. \\
+    \Macro\@currsize      & Let to the last font size command (e.g.\ |\small|). \\
+    \Macro\curr@math@size & Holds locally the current math size. \\
+    \Macro\curr@fontshape & |\f@encoding /\f@family /\f@series /\f@shape| \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Paragraph}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\@@par          & Plain\TeX{} primitive \cs{par}. \\
+   \Macro\@setpar{<val>} & Used to make environment-wide changes to \cs{par}. Sets both \cs{par} and \cs{@par} to \meta{val}.  \\
+   \Macro\@restorepar    & Defines \cs{par} to \cs{@par}. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Space Hack}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\@bsphack & \\
+   \Macro\@esphack & Both of these macro ensure that the code between them does not insert any spaces into the document.
+    The code itself should not produce any text and not change the mode (e.g.\ start or stop math mode).\\
+   \Macro\@Esphack & Variant of \cs{@esphack} which sets the |@ignore| switch to true which causes an \cs{ignorespaces}
+                after the \cs{end} of the environment.\\
+   \Macro\@vbsphack & Variant of \cs{@bsphack} which ensure the invisible material is \emph{not} set in vmode. Not used by \LaTeX{} itself at the moment. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Boxes}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+   \Macro\null & Empty \Macro\hbox. Good to fill places which must not be empty. \\
+   \Macro\strutbox & Box with dimension of |\strut|, i.e.\ maximum height and depth of the current font and zero width. Can be used to extract this dimension
+                     with \texttt{\string\ht\string\strutbox} and \texttt{\string\dp\string\strutbox}. \\
+   \Macro\@arstrutbox & Defined inside array and tabular. Like \Macro\strutbox but stretched by \Macro\arraystretch. \\
+   \Macro\@begin@tempboxa<box>{<content>} & Stores \meta{content} into \Macro\@tempboxa as \meta{box} (\cs{hbox} or \cs{vbox}) and stores its dimension into \Macro\width, \Macro\height, \Macro\depth and \Macro\totalheight. \\
+   \Macro\@end@tempboxa  & Ends a \Macro\@begin@tempboxa environment. \\
+   \Macro\hb@xt@    & \Macro\hbox~'to' \\
+   \Macro\hmode@bgroup & \Macro\leavevmode\AlsoMacro\bgroup \\
+   \bottomrule
+\end{tabularx}
+
+\DescribeMacro\@settodim{<dimension cs>}{<length register>}{<content>}
+Sets the \meta{length register} to the dimension given by the \meta{dimension} (\Macro\ht, \Macro\dp and \Macro\wd\relax) of the \meta{content}.
+Example: \Macro\@settodim{\Macro\wd}{\Macro\@tempdima}{Hello World}
+will set \Macro\@tempdima  to the width of \qq{Hello World}.
+
+
+
+
+\subsection{Base Conversion}
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+     \Macro\hexnumber@{<number>} & Returns a single digit hexadecimal number (\mbox{0--9}, \mbox{A--F}) from given \meta{number}, which must either be a numeric register or a number ending with a space! \\
+     \Macro\@alph{<number>} & Expands to lower case letter corresponding to the given number (1=a, 2=b, \ldots). Expands to \Macro\@ctrerr if number is larger then~26.\\
+     \Macro\@Alph{<number>} & Expands to upper case letter corresponding to the given number (1=A, 2=B, \ldots). Expands to \Macro\@ctrerr if number is larger then~26.\\
+    \Macro\two@digits{<number>} &
+        Returns \meta{number} (e.g.\ a |count| register) as string and ensures that it has at least two digits 
+        by appending a "0" if required. \\
+   \bottomrule
+\end{tabularx}
+
+\subsection{Conditionals}
+
+\begin{tabularx}{\linewidth}{lX}
+   \toprule
+   Macro & Description \\
+   \midrule
+\Macro{if@compatibility} & Switch to indicate if the LaTeX2.09 compatibility mode is active. \\
+\Macro{if@ignore} &  Whether or not to ignore spaces after an environment. Set to true by \Macro\ignorespacesafterend.\\
+\Macro{if@minipage} & True for a |minipage|, false for a |parbox|. Responsible for adding space, skips and paragraph indents for a |parbox|.\\
+\Macro{if@twoside}    & True for two-sided documents \\
+\Macro{if@twocolumn}  & Indicates if two-column mode is active \\
+\Macro{if@firstcolumn}& Indicates if the first column is processed \\
+   \bottomrule
+\end{tabularx}
+
+
+% ToDo Check footnote makros
+
+
+\end{document}
+
+
diff --git a/Master/tlpkg/tlpsrc/collection-documentation-english.tlpsrc b/Master/tlpkg/tlpsrc/collection-documentation-english.tlpsrc
index fcef3412f09..1219c13e341 100644
--- a/Master/tlpkg/tlpsrc/collection-documentation-english.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-documentation-english.tlpsrc
@@ -26,6 +26,7 @@ depend latex2e-help-texinfo
 depend latex4wp
 depend latexcheat
 depend lshort-english
+depend macros2e
 depend math-e
 depend mathmode
 depend memdesign
diff --git a/Master/tlpkg/tlpsrc/macros2e.tlpsrc b/Master/tlpkg/tlpsrc/macros2e.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/macros2e.tlpsrc