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+% \iffalse meta-comment
+%
+% Copyright (C) 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either
+% version 1.3 of this license or (at your option) any later
+% version. The latest version of this license is in
+% http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of
+% LaTeX version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status "maintained".
+%
+% This Current Maintainer of this work is Heiko Oberdiek.
+%
+% This work consists of the main source file colonequals.dtx
+% and the derived files
+% colonequals.sty, colonequals.pdf, colonequals.ins, colonequals.drv.
+%
+% Distribution:
+% CTAN:macros/latex/contrib/oberdiek/colonequals.dtx
+% CTAN:macros/latex/contrib/oberdiek/colonequals.pdf
+%
+% Unpacking:
+% (a) If colonequals.ins is present:
+% tex colonequals.ins
+% (b) Without colonequals.ins:
+% tex colonequals.dtx
+% (c) If you insist on using LaTeX
+% latex \let\install=y\input{colonequals.dtx}
+% (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+% (a) If colonequals.drv is present:
+% latex colonequals.drv
+% (b) Without colonequals.drv:
+% latex colonequals.dtx; ...
+% The class ltxdoc loads the configuration file ltxdoc.cfg
+% if available. Here you can specify further options, e.g.
+% use A4 as paper format:
+% \PassOptionsToClass{a4paper}{article}
+%
+% Programm calls to get the documentation (example):
+% pdflatex colonequals.dtx
+% makeindex -s gind.ist colonequals.idx
+% pdflatex colonequals.dtx
+% makeindex -s gind.ist colonequals.idx
+% pdflatex colonequals.dtx
+%
+% Installation:
+% TDS:tex/latex/oberdiek/colonequals.sty
+% TDS:doc/latex/oberdiek/colonequals.pdf
+% TDS:source/latex/oberdiek/colonequals.dtx
+%
+%<*ignore>
+\begingroup
+ \def\x{LaTeX2e}
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+ \ifx\csname processbatchFile\endcsname\relax\else1\fi
+ \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: colonequals 2006/08/01 v1.0 Colon equals symbols (HO)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\preamble
+
+This is a generated file.
+
+Copyright (C) 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either
+version 1.3 of this license or (at your option) any later
+version. The latest version of this license is in
+ http://www.latex-project.org/lppl.txt
+and version 1.3 or later is part of all distributions of
+LaTeX version 2005/12/01 or later.
+
+This work has the LPPL maintenance status "maintained".
+
+This Current Maintainer of this work is Heiko Oberdiek.
+
+This work consists of the main source file colonequals.dtx
+and the derived files
+ colonequals.sty, colonequals.pdf, colonequals.ins, colonequals.drv.
+
+\endpreamble
+
+\generate{%
+ \file{colonequals.ins}{\from{colonequals.dtx}{install}}%
+ \file{colonequals.drv}{\from{colonequals.dtx}{driver}}%
+ \usedir{tex/latex/oberdiek}%
+ \file{colonequals.sty}{\from{colonequals.dtx}{package}}%
+}
+
+\obeyspaces
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{* colonequals.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `colonequals.drv'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesFile{colonequals.drv}%
+ [2006/08/01 v1.0 Colon equals symbols (HO)]
+\documentclass{ltxdoc}
+\usepackage{holtxdoc}
+\usepackage{colonequals}
+\usepackage{array}
+\usepackage{capt-of}
+\usepackage{longtable}
+\begin{document}
+ \DocInput{colonequals.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{92}
+%
+% \CharacterTable
+% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+% Digits \0\1\2\3\4\5\6\7\8\9
+% Exclamation \! Double quote \" Hash (number) \#
+% Dollar \$ Percent \% Ampersand \&
+% Acute accent \' Left paren \( Right paren \)
+% Asterisk \* Plus \+ Comma \,
+% Minus \- Point \. Solidus \/
+% Colon \: Semicolon \; Less than \<
+% Equals \= Greater than \> Question mark \?
+% Commercial at \@ Left bracket \[ Backslash \\
+% Right bracket \] Circumflex \^ Underscore \_
+% Grave accent \` Left brace \{ Vertical bar \|
+% Right brace \} Tilde \~}
+%
+% \GetFileInfo{colonequals.drv}
+%
+% \title{The \xpackage{colonequals} package}
+% \date{2006/08/01 v1.0}
+% \author{Heiko Oberdiek\\\xemail{oberdiek@uni-freiburg.de}}
+%
+% \maketitle
+%
+% \begin{abstract}
+% Package \xpackage{colonequals} defines poor man's symbols
+% for math relation symbols such as ``colon equals''.
+% The colon is centered around the horizontal math axis.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section{User interface}
+%
+% \subsection{Introduction}
+%
+% Math symbols consisting of the colon character can be
+% constructed with the colon text character, if the math font
+% lacks of the complete symbol. Often, however, the colon text
+% character is not centered around the math axis. Especially
+% combined with the equals symbol the composed symbol does not
+% look symmetrically. Thus this packages defines a colon
+% math symbol \cs{ratio} that is centered around the horizontal
+% math axis. Also math symbols are provided that consist of the
+% colon symbol. The package is not necessary, if the math
+% font contains the composed symbols. Examples are \textsf{txfonts}
+% (\cite{txfonts}) or \textsf{mathabx} (\cite{mathabx}).
+%
+% \subsection{Symbols}
+%
+% All symbols of this package are relation symbols.
+% The relation property can be changed by the appropriate
+% \TeX\ command \cs{mathbin}, \cs{mathord}, \dots
+%
+% \begin{center}
+% \captionof{table}{Unicode mathematical operators}
+% \kern1ex
+% \begin{tabular}{l>{\scshape}l>{$}l<{$}l}
+% U+2236 & ratio & \ratio & \cs{ratio} \\
+% U+2237 & proportion & \coloncolon & \cs{coloncolon} \\
+% U+2239 & excess & \colonminus & \cs{colonminus} \\
+% U+2254 & colon equals & \colonequals & \cs{colonequals} \\
+% U+2255 & equals colon & \equalscolon & \cs{equalscolon} \\
+% \end{tabular}
+% \end{center}
+%
+% The following grammar generates all symbols that are supported by
+% this package:
+% \begin{center}
+% \captionof{table}{Symbol grammar}
+% \kern1ex
+% \begin{tabular}{@{}l>{$}r<{$}l@{}}
+% symbols & \coloncolonequals & col \\
+% & \mid & col symbol \\
+% & \mid & symbol col \\
+% & ; & \\[1ex]
+% col & \coloncolonequals & '\texttt{:}' \\
+% & \mid & '\texttt{::}' \\
+% & ; & \\[1ex]
+% symbol & \coloncolonequals & '\texttt{=}' \\
+% & \mid & '\texttt{-}' \\
+% & \mid & '$\approx$' \\
+% & \mid & '$\sim$' \\
+% & ; &
+% \end{tabular}
+% \end{center}
+%
+% \def\entry#1{\csname #1\endcsname&\cs{#1}\\}
+% \def\entryset#1{^^A
+% \entry{colon#1}^^A
+% \entry{coloncolon#1}^^A
+% \entry{#1colon}^^A
+% \entry{#1coloncolon}^^A
+% }
+% \begin{longtable}{>{$}l<{$}l}
+% \caption{All relation symbols}\\
+% \entry{ratio}
+% \entry{coloncolon}
+% \entryset{equals}
+% \entryset{minus}
+% \entryset{approx}
+% \entryset{sim}
+% \end{longtable}
+%
+% \subsection{Fine tuning}
+%
+% The distances in composed symbols can be configured:
+%
+% \begin{declcs}{colonsep}
+% \end{declcs}
+% Macro \cs{colonsep} is executed between the colon and
+% the other symbol.
+%
+% \begin{declcs}{doublecolonsep}
+% \end{declcs}
+% Macro \cs{doublecolonsep} controls the distance between
+% two colons.
+%
+% \subsubsection{Example}
+% \begin{quote}
+% \verb|\renewcommand*{\colonsep}{\mskip-.5\thinmuskip}|
+% \end{quote}
+%
+%
+% \StopEventually{
+% }
+%
+% \section{Implementation}
+%
+% \subsection{Identification}
+%
+% \begin{macrocode}
+%<*package>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{colonequals}%
+ [2006/08/01 v1.0 Colon equals symbols (HO)]
+% \end{macrocode}
+%
+% \subsection{Distance control}
+%
+% \begin{macro}{\colonsep}
+% \begin{macrocode}
+\newcommand*{\colonsep}{}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\doublecolonsep}
+% \begin{macrocode}
+\newcommand*{\doublecolonsep}{}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Centered colons}
+%
+% \begin{macrocode}
+\def\@center@colon{%
+ \mathpalette\@center@math{:}%
+}
+\def\@center@math#1#2{%
+ \vcenter{%
+ \m@th
+ \hbox{$#1#2$}%
+ }%
+}
+% \end{macrocode}
+%
+% \begin{macro}{\ratio}
+% Because the name \cs{colon} is already in use, the Unicode name
+% \cs{ratio} is used for the centered colon relation symbol.
+% (The \cs{ratio} of package \textsf{calc} is not used outside
+% calc expressions.)
+% \begin{macrocode}
+\newcommand*{\ratio}{%
+ \ensuremath{%
+ \mathrel{%
+ \@center@colon
+ }%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\coloncolon}
+% \begin{macrocode}
+\newcommand*{\coloncolon}{%
+ \ensuremath{%
+ \mathrel{%
+ \@center@colon
+ \doublecolonsep
+ \@center@colon
+ }%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Combined symbols}
+%
+% \begin{macrocode}
+\def\@make@colon@set#1#2{%
+ \begingroup
+ \let\@center@colon\relax
+ \let\newcommand\relax
+ \let\ensuremath\relax
+ \let\mathrel\relax
+ \let\colonsep\relax
+ \let\doublecolonsep\relax
+ \def\csx##1{%
+ \expandafter\noexpand\csname ##1\endcsname
+ }%
+ \edef\x{\endgroup
+ \newcommand*{\csx{colon#1}}{%
+ \ensuremath{%
+ \mathrel{%
+ \@center@colon
+ \colonsep
+ {#2}%
+ }%
+ }%
+ }%
+ \newcommand*{\csx{coloncolon#1}}{%
+ \ensuremath{%
+ \mathrel{%
+ \@center@colon
+ \doublecolonsep
+ \@center@colon
+ \colonsep
+ {#2}%
+ }%
+ }%
+ }%
+ \newcommand*{\csx{#1colon}}{%
+ \ensuremath{%
+ \mathrel{%
+ {#2}%
+ \colonsep
+ \@center@colon
+ }%
+ }%
+ }%
+ \newcommand*{\csx{#1coloncolon}}{%
+ \ensuremath{%
+ \mathrel{%
+ {#2}%
+ \colonsep
+ \@center@colon
+ \doublecolonsep
+ \@center@colon
+ }%
+ }%
+ }%
+ }%
+ \x
+}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\@make@colon@set{equals}{=}%
+\@make@colon@set{minus}{-}%
+\@make@colon@set{approx}{\approx}
+\@make@colon@set{sim}{\sim}
+% \end{macrocode}
+%
+% \begin{macrocode}
+%</package>
+% \end{macrocode}
+% \section{Installation}
+%
+% \paragraph{CTAN.} This package is available on
+% CTAN\footnote{\url{ftp://ftp.ctan.org/tex-archive/}}:
+% \begin{description}
+% \item[\CTAN{macros/latex/contrib/oberdiek/colonequals.dtx}] The source file.
+% \item[\CTAN{macros/latex/contrib/oberdiek/colonequals.pdf}] Documentation.
+% \end{description}
+%
+% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
+% \docstrip\ archive. The files are extracted by running the
+% \xfile{.dtx} through \plainTeX:
+% \begin{quote}
+% \verb|tex colonequals.dtx|
+% \end{quote}
+%
+% \paragraph{TDS.} Now the different files must be moved into
+% the different directories in your installation TDS tree
+% (also known as \xfile{texmf} tree):
+% \begin{quote}
+% \sbox0{^^A
+% \begin{tabular}{@{}>{\ttfamily}l@{$\quad\rightarrow\quad$}>{\ttfamily}l@{}}
+% colonequals.sty & tex/latex/oberdiek/colonequals.sty\\
+% colonequals.pdf & doc/latex/oberdiek/colonequals.pdf\\
+% colonequals.dtx & source/latex/oberdiek/colonequals.dtx\\
+% \end{tabular}^^A
+% }%
+% \ifdim\wd0>\linewidth
+% \mbox{}\nobreak\hskip0pt minus\leftmargin
+% \usebox0
+% \nobreak\hskip0pt minus\rightmargin
+% \else
+% \usebox0
+% \fi
+% \end{quote}
+% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
+% TDS installing feature, then some files can already be in the right
+% place, see the documentation of \docstrip.
+%
+% \paragraph{Refresh file databases.} If your \TeX~distribution
+% (\teTeX, \mikTeX, \dots) rely on file databases, you must refresh
+% these. For example, \teTeX\ users run \verb|texhash| or
+% \verb|mktexlsr|.
+%
+% \subsection{Some details for the interested}
+%
+% \paragraph{Attached source.}
+%
+% The PDF documentation on CTAN also includes the
+% \xfile{.dtx} source file. It can be extracted by
+% AcrobatReader 6 or higher. Another option is \textsf{pdftk},
+% e.g. unpack the file into the current directory:
+% \begin{quote}
+% \verb|pdftk colonequals.pdf unpack_files output .|
+% \end{quote}
+%
+% \paragraph{Unpacking with \LaTeX.}
+% The \xfile{.dtx} chooses its action depending on the format:
+% \begin{description}
+% \item[\plainTeX:] Run \docstrip\ and extract the files.
+% \item[\LaTeX:] Generate the documentation.
+% \end{description}
+% If you insist on using \LaTeX\ for \docstrip\ (really,
+% \docstrip\ does not need \LaTeX), then inform the autodetect routine
+% about your intension:
+% \begin{quote}
+% \verb|latex \install=y\input{colonequals.dtx}|
+% \end{quote}
+% Do not forget to quote the argument according to the demands
+% of your shell.
+%
+% \paragraph{Generating the documentation.}
+% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
+% the documentation. The process can be configured by the
+% configuration file \xfile{ltxdoc.cfg}. For instance, put this
+% line into this file, if you want to have A4 as paper format:
+% \begin{quote}
+% \verb|\PassOptionsToClass{a4paper}{article}|
+% \end{quote}
+% An example follows how to generate the
+% documentation with pdf\LaTeX:
+% \begin{quote}
+%\begin{verbatim}
+%pdflatex colonequals.dtx
+%makeindex -s gind.ist colonequals.idx
+%pdflatex colonequals.dtx
+%makeindex -s gind.ist colonequals.idx
+%pdflatex colonequals.dtx
+%\end{verbatim}
+% \end{quote}
+%
+% \begin{thebibliography}{9}
+%
+% \bibitem{txfonts}
+% Young Ryu: \textit{The TX Fonts};
+% 2000/12/15;
+% \CTAN{fonts/txfonts/}.
+%
+% \bibitem{mathabx}
+% Anthony Phan: \textit{Mathabx font series};
+% 2005/05/16;
+% \CTAN{fonts/mathabx/}.
+%
+% \end{thebibliography}
+%
+% \begin{History}
+% \begin{Version}{2006/08/01 v1.0}
+% \item
+% First version.
+% \end{Version}
+% \end{History}
+%
+% \PrintIndex
+%
+% \Finale
+\endinput