new latex package acro (23jul12)

git-svn-id: svn://tug.org/texlive/trunk@27113 c570f23f-e606-0410-a88d-b1316a301751

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diff --git a/Master/texmf-dist/doc/latex/acro/README b/Master/texmf-dist/doc/latex/acro/README
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+--------------------------------------------------------------------------
+the ACRO package
+
+  Typeset Acronyms
+
+2012/07/23 v0.3d
+--------------------------------------------------------------------------
+Clemens Niederberger
+Web:    https://bitbucket.org/cgnieder/acro/
+E-Mail: contact@mychemistry.eu
+--------------------------------------------------------------------------
+Copyright 2012 Clemens Niederberger
+
+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'.
+
+The Current Maintainer of this work is Clemens Niederberger.
+--------------------------------------------------------------------------
+The acro package consists of the files
+ - acro.sty, acro_en.tex, acro_en.pdf, README
+--------------------------------------------------------------------------
+If you have any ideas, questions, suggestions or bugs to report, please
+feel free to contact me.
+--------------------------------------------------------------------------
\ No newline at end of file
diff --git a/Master/texmf-dist/doc/latex/acro/acro_en.pdf b/Master/texmf-dist/doc/latex/acro/acro_en.pdf
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diff --git a/Master/texmf-dist/doc/latex/acro/acro_en.tex b/Master/texmf-dist/doc/latex/acro/acro_en.tex
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+% arara: pdflatex
+% arara: makeindex: { sort: true, style: acro_en.ist }
+% arara: biber
+% arara: pdflatex
+% arara: pdflatex
+% --------------------------------------------------------------------------
+% the ACRO package
+% 
+%   Typeset Acronyms
+% 
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    https://bitbucket.org/cgnieder/acro/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2012 Clemens Niederberger
+% 
+% 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'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% --------------------------------------------------------------------------
+% The acro package consists of the files
+%  - acro.sty, acro_en.tex, acro_en.pdf, README
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+%
+% if you want to compile this documentation you'll need the document class
+% `cnpkgdoc' which you can get here:
+%    https://bitbucket.org/cgnieder/cnpkgdoc/
+% the class is licensed LPPL 1.3 or later
+%
+\documentclass[DIV10,toc=index,toc=bib,hyperfootnotes=false]{cnpkgdoc}
+\docsetup{
+  pkg = {[single,macros,sort]acro} ,
+  code-box = {
+    backgroundcolor  = gray!7!white ,
+    skipbelow        = .6\baselineskip plus .5ex minus .5ex ,
+    skipabove        = .6\baselineskip plus .5ex minus .5ex ,
+    roundcorner      = 3pt ,
+  } ,
+  gobble   = 1
+}
+
+% Layout:
+\usepackage[osf]{libertine}
+\acsetup{hyperref}
+\cnpkgcolors{
+  main   => cnpkgred ,
+  key    => yellow!40!brown ,
+  module => cnpkgblue ,
+  link   => black!90
+}
+\renewcommand*\othersectionlevelsformat[3]{%
+  \textcolor{main}{#3\autodot}\enskip}
+\renewcommand*\partformat{%
+  \textcolor{main}{\partname~\thepart\autodot}}
+\usepackage[biblatex]{embrac}[2012/06/29]
+\ChangeEmph{[}[,.02em]{]}[.055em,-.08em]
+\ChangeEmph{(}[-.01em,.04em]{)}[.04em,-.05em]
+
+% highlight commands in listings:
+\addcmds{
+  ac,
+  aca,
+  acap,
+  acf,
+  acfp,
+  acl,
+  aclp,
+  acp,
+  acresetall,
+  DeclareAcronymFormat,
+  acs,
+  acsetup,
+  acsp,
+  addcolon,
+  nato,
+  DeclareAcronym,
+  linewidth,
+  newlist,
+  ny,
+  printacronyms,
+  setlist
+}
+
+\usepackage{filecontents}
+
+% bibliography:
+\usepackage[backend=biber,style=alphabetic,maxnames=10]{biblatex}
+\addbibresource{\jobname.bib}
+\begin{filecontents}{\jobname.bib}
+@software{abbrevs,
+  title   = {abbrevs},
+  author  = {Matt Swift},
+  date    = {2001-09-08},
+  version = {1.4},
+  url     = {http://www.ctan.org/pkg/abbrevs}
+}
+@software{acromake,
+  title   = {acromake},
+  author  = {Paul A. Thompson},
+  date    = {1995-07-16},
+  version = {na},
+  url     = {http://www.ctan.org/pkg/acromake}
+}
+@software{acronym,
+  title   = {acronym -- An Acronym Environment for \LaTeXe},
+  author  = {Tobias Oetiker},
+  date    = {2010-09-08},
+  version = {1.36},
+  url     = {http://www.ctan.org/pkg/acronym}
+}
+@software{acroterm,
+  title   = {acroterm},
+  author  = {Jakob Voss},
+  date    = {2010-11-19},
+  version = {0.1},
+  url     = {http://www.ctan.org/pkg/acroterm}
+}
+@software{glossaries,
+  title   = {glossaries},
+  author  = {Nicola L.C. Talbot},
+  date    = {2011-04-12},
+  version = {3.01},
+  url     = {http://www.ctan.org/pkg/glossaries}
+}
+@software{nomencl,
+  title   = {nomencl -- A Package to Create a Nomenclature},
+  author  = {Boris Veytsman and Bernd Schandl and Lee Netherton and C.V. Radhakrishnan},
+  date    = {2005-09-22},
+  version = {4.2},
+  url     = {http://www.ctan.org/pkg/nomencl}
+}
+@online{wikipedia,
+  author  = {Wikipedia},
+  title   = {Acronym and initialism},
+  urldate = {2012-06-21},
+  url     = {http://en.wikipedia.org/wiki/Acronyms},
+  year    = {2012}
+}
+\end{filecontents}
+
+% index:
+\usepackage{makeidx}
+\begin{filecontents}{\jobname.ist}
+ heading_prefix "{\\bfseries "
+ heading_suffix "\\hfil}\\nopagebreak\n"
+ headings_flag  1
+ delim_0 "\\dotfill "
+ delim_1 "\\dotfill "
+ delim_2 "\\dotfill "
+ delim_r "\\textendash"
+ suffix_2p "\\nohyperpage{\\,f.}"
+ suffix_3p "\\nohyperpage{\\,ff.}"
+\end{filecontents}
+
+% abstract:
+\TitlePicture{\parbox{.75\linewidth}{%
+  \acro not only allows you to create acronyms in a simple way but also lets you
+  add them to different classes of acronyms. Lists can be created of separate classes
+  wherever you want the list to appear.\par
+  \acro also provides an option \key{single} which ignores acronyms that are used
+  only once in the whole document.\par
+  As an experimental feature \acro also offers the option \key{sort} which
+  automatically sorts the list created by \cmd{printacronyms}.}}
+
+% footnotes:
+\usepackage{fnpct}
+% \usepackage{bigfoot}
+% \DeclareNewFootnote[para]{default}
+
+% additional packages:
+\usepackage{longtable,enumitem,ragged2e}
+
+% custom macros:
+\newcommand*\wikipedia{\libertineGlyph{W.alt}\kern-.055em\textsc{ikipedia}}
+\newcommand*\h[1]{\textcolor{main}{\textbf{#1}}}
+
+\ExplSyntaxOn
+\NewDocumentCommand \Default {g}
+  {
+    \hfill\llap
+      {
+        \IfNoValueTF { #1 }
+          {(initially~empty)}
+          {Default:~\code{#1}}
+      }
+    \newline
+  }
+\ExplSyntaxOff
+
+% define acronyms:
+\DeclareAcronym{cd}{cd}{Compact Disc}
+  \DeclareAcronymFormat{cd}{\scshape}
+\DeclareAcronym{id}{id}{identification string}
+  \DeclareAcronymFormat{id}{\scshape}
+\DeclareAcronym{jpg}{JPEG}[JPG]{Joint Photographic Experts Group}
+\DeclareAcronym{la}{LA,}{Los Angeles,}[city]
+\DeclareAcronym*{mp}{MP}{Member of Parliament,Members of Parliament}
+\DeclareAcronym{nato}{nato}{North Atlantic Treaty Organization}{\textit{deutsch}: Organisation des Nordatlantikvertrags}
+  \DeclareAcronymFormat{nato}{\scshape}
+\DeclareAcronym{ny}{NY,}{New York,}[city]
+\DeclareAcronym{ot}{ot}{Other Test}
+  \DeclareAcronymFormat{ot}{\scshape}
+\DeclareAcronym{sw}{SW}{Sammelwerk,e}
+\DeclareAcronym{test}{ST}{Some Test}
+\DeclareAcronym{texse}{\{TeX\}.SE}{\TeX\ StackExchange}
+
+\makeindex
+\begin{document}
+\newpage
+\section{Licence and Requirements}
+Permission is granted to copy, distribute and/or modify this software under the
+terms of the \LaTeX{} Project Public License, version 1.3 or later
+(\url{http://www.latex-project.org/lppl.txt}). The package has the status
+``maintained.''
+
+\acro loads and needs the following packages: \paket{expl3},
+\paket{xparse}, \paket{xtemplate} and \paket{l3keys2e}.
+
+\section{About}
+\begin{zitat}[\cite{wikipedia}]
+ Acronyms and initialisms are abbreviations formed from the initial components
+ in a phrase or a word. These components may be individual letters (as in CEO)
+ or parts of words (as in Benelux and Ameslan). There is no universal agreement
+ on the precise definition of the various terms nor on written usage.
+\end{zitat}
+After \wikipedia\ told us what acronyms are and we won't confuse them with units
+or other kinds of abbreviations -- why would we need another package for them?
+There are several already: \paket{acronym}~\cite{acronym}, \paket{acromake}%
+~\cite{acromake}, \paket{acroterm}~\cite{acroterm}, the abbreviations package
+\paket{abbrevs}~\cite{abbrevs} (the current version 1.4 has a bug\footnote{see
+\url{http://tex.stackexchange.com/q/59840/5049} for solutions.}, though), the
+nomenclature package \paket{nomencl}~\cite{nomencl}, and of course the mighty
+\paket{glossaries}~\cite{glossaries}. So there is really no \emph{need} for a
+new package.
+
+On the other hand \paket{acronym}, the best of the acronym specific packages,
+has one or two shortcomings and sometimes using \paket{glossaries} seems a bit
+of an overkill (or simply inconvenient as one has to run \code{makeglossaries},
+\code{makeindex} or \code{xindy}, then). So \acro stands somewhere in between
+(but much closer to \paket{acronym}).
+
+The main reason for the existance of \acro is a question on \acs{texse}%
+\footnote{\url{http://tex.stackexchange.com/q/59449/5049}} which intrigued
+me and in consequence led to \acro and it's option \key{single}.
+
+\acro has many similarities with the \paket{acronym} package. In fact, quite
+some macros have the same name and meaning\footnote{\emph{Not} in the sense of
+\code{\textbackslash\textcolor{code}{meaning}}!}.
+
+\section{Basics}\secidx{Basics}
+\subsection{Creating New Acronyms}\secidx[new acronyms]{Basics}
+Acronyms are created with the command \cmd{DeclareAcronym} that can only be used in
+the preamble.
+\begin{beschreibung}
+ \Befehl{DeclareAcronym}*{<id>}\ma{<short>,<pl>}\oa{<alt.>}\ma{<long>,<pl>}\ma{<extra>}\oa{<class>}
+ \verb+% can be used only in preamble+
+ \Befehl{DeclareAcronymFormat}{<id>}\ma{<format>} \verb+% can be used only in preamble+
+\end{beschreibung}
+Although this command has quite a number of arguments. In the simplest case you'll
+only need three:
+\begin{beispiel}[code only]
+ % preamble
+ \DeclareAcronym{test}{ST}{Some Test}
+\end{beispiel}
+This creates the acronym ``\acs{test}'' with the \acs{id} ``test'' and the long
+form ``\acl{test}''. The other arguments will be described later in this document.
+
+\cmd{DeclareAcronymFormat} lets you assign a special format to an acronym. Maybe
+small caps:
+\begin{beispiel}[code only]
+ % preamble:
+ \DeclareAcronym{ot}{ot}{Other Test}
+ \DeclareAcronymFormat{ot}{\scshape}
+\end{beispiel}
+The short form now looks like this: \acs{ot}.
+
+\subsection{Using the Acronyms -- the Commands}\secidx[using acronyms]{Basics}
+Acronyms are used with with one of the following commands:
+\begin{beschreibung}
+ \befehl{ac} basic command; the first output is different from subsequent ones.
+ \befehl{Ac} same as \cmd{ac} but capitalizes the first letter of the long form.
+ \befehl{acs} \h{s}hort form; the actual acronym.
+ \befehl{acl} \h{l}ong form; the meaning of the acronym.
+ \befehl{Acl} same as \cmd{acl} but capitalizes first letter.
+ \befehl{aca} \h{a}lternative short form as specified in the \oa{<short>} argument
+ of \cmd{DeclareAcronym}; if it hasn't been specified this is identical to \cmd{acs}.
+ \befehl{acf} first form; output like the first time \cmd{ac} is output.
+ \befehl{Acf} same as \cmd{acf} but capitalizes first letter of the long form.
+ \befehl{acp} \h{p}lural form of \cmd{ac};
+ \befehl{Acp} same as \cmd{acp} but capitalizes first letter of the long form.
+ \befehl{acsp} plural form of \cmd{acs};
+ \befehl{aclp} plural form of \cmd{acp};
+ \befehl{Aclp} same as \cmd{aclp} but capitalizes first letter.
+ \befehl{acap} plural form of \cmd{aca};
+ \befehl{acfp} plural form of \cmd{acf};
+ \befehl{Acfp} same as \cmd{acfp} but capitalizes first letter of the long form.
+\end{beschreibung}
+If an acronym is used the first time with \cmd{ac} its output is different from
+subsequent uses. To be clear on this: the first time! If the acronym has been
+used with \emph{any} of the output commands before it is \emph{not} the first
+time any more.
+
+\begin{beispiel}
+ % preamble: \DeclareAcronym{cd}{cd}{Compact Disc}
+ % \DeclareAcronymFormat{cd}{\scshape}
+ first time: \ac{cd} \\
+ second time: \ac{cd} \\
+ short: \acs{cd} \\
+ alternative: \aca{cd} \\
+ first again: \acf{cd} \\
+ long: \acl{cd} \\
+ short plural: \acsp{cd} \\
+ long plural: \aclp{cd}
+\end{beispiel}
+
+\subsection{Plural Forms}\secidx[plural forms]{Basics}
+If an acronym is defined in the standard way \acro uses an `s' that's appended to
+both the short and the long form when one of the plural commands is used. However,
+that is not always the best solution. For one thing not all acronyms may have a
+plural form. Second, the plural form especially of the long forms may be fomed
+differently. And third, other languages can have other plural endings.
+
+For this reason \cmd{DeclareAcronym} provides additional arguments:
+\begin{beschreibung}
+ \Befehl{DeclareAcronym}{<id>}\ma{<short>,<plural ending>}\ma{<long>,<plural ending>}
+ \Befehl{DeclareAcronym}*{<id>}\ma{<short>,<plural ending>}\ma{<long>,<plural form>}
+\end{beschreibung}
+These arguments are optional. If they're not used, the default setting is `s'.
+If you use the starred version the long form will be replaced by the specified
+plural form when necessary. A given short plural will still be appended.
+
+\begin{beispiel}
+ % preamble:
+ % \DeclareAcronym{cd}{\textsc{cd}}{Compact Disc}
+ %   \DeclareAcronymFormat{cd}{\scshape}
+ % \DeclareAcronym{ny}{NY,}{New York,}
+ % \DeclareAcronym{sw}{SW}{Sammelwerk,e}
+ % \DeclareAcronym*{mp}{MP}{Member of Parliament,Members of Parliament}
+ \acsp{cd}, \aclp{cd} \\
+ \acsp{ny}, \aclp{ny} \\
+ \acsp{sw}, \aclp{sw} \\
+ \acsp{mp}, \aclp{mp}
+\end{beispiel}
+
+\subsection{Alternative Short Forms}\secidx[alternative forms]{Basics}
+For some acronyms it might be useful to have alternative forms. For this
+\cmd{DeclareAcronym} has another optional argument:
+\begin{beschreibung}
+ \Befehl{DeclareAcronym}{<id>}\ma{<short>}\oa{<alternative>}\ma{<long>}
+\end{beschreibung}
+\begin{beispiel}
+ % preamble \DeclareAcronym{jpg}{JPEG}[JPG]{Joint Photographic Experts Group}
+ default: \acs{jpg} \\
+ alt.: \aca{jpg}
+\end{beispiel}
+The alternative form uses the same plural ending as the default short form and
+is formatted in the same way.
+
+\subsection{Extra Information for the List Entry}\secidx[extra information]{Basics}
+Of course you can print a list of acronyms where their meaning is explained.
+Sometimes it can be useful to add additional information there. This is done with
+another optional argument to \cmd{DeclareAcronym}:
+\begin{beschreibung}
+ \Befehl{DeclareAcronym}{<id>}\ma{<short>}\ma{<long>}\ma{<extra>}
+\end{beschreibung}
+These information will only be displayed in the list. See section~\ref{sec:print_lists}
+for the impact of the following example.
+
+\begin{beispiel}
+ % preamble:
+ % \DeclareAcronym{nato}{nato}{North Atlantic Treaty Organization}{\textit{deutsch}: Organisation des Nordatlantikvertrags}
+ % \DeclareAcronymFormat{nato}{\scshape}
+ The \ac{nato} is an intergovernmental military alliance based on the
+ North Atlantic Treaty which was signed on 4~April 1949. \ac{nato}
+ headquarters are in Brussels, Belgium, one of the 28 member states
+ across North America and Europe, the newest of which, Albania and
+ Croatia, joined in April 2009.
+\end{beispiel}
+\secidx*{Basics}
+
+\section{Additional Commands and Possibilities}\secidx{Additional Commands}
+\subsection{Using Classes}\secidx[classes]{Additional Commands}
+The acronyms of \acro can be divided into different classes. This doesn't change
+the output but allows different acronym lists, see section~\ref{sec:print_lists}.
+For this \cmd{DeclareAcronym} has an optional argument:
+\begin{beschreibung}
+ \Befehl{DeclareAcronym}{<id>}\ma{<short>}\ma{<long>}\oa{<class>}
+\end{beschreibung}
+\begin{beispiel}
+ % preamble:
+ % \DeclareAcronym{la}{LA,}{Los Angeles,}[city]
+ % \DeclareAcronym{ny}{NY,}{New York,}[city]
+ \acl{la} (\acs{la}) \\
+ \acl{ny} (\acs{ny})
+\end{beispiel}
+This might be useful if you can and want to divide your acronyms into different
+types, technical and grammatical ones, say, that shall be listed in different
+lists.
+
+\subsection{Resetting}\secidx[resetting]{Additional Commands}
+If you want for some reason to fool \acro into thinking that an acronym is used
+for the first time you can call this command:
+\begin{beschreibung}
+ \Befehl{acresetall}
+\end{beschreibung}
+\begin{beispiel}
+ \acresetall
+ \ac{ny}
+\end{beispiel}
+Beware that this command acts \emph{globally} and effects \emph{all} acronyms!
+
+\subsection{Labels}\secidx[labels]{Additional Commands}
+The first usage of an acronym sets a label \verb+\label{ac:<id>}+, regardless
+which command has been used to typeset it. This label is used to create the page
+numbers in the list (see section~\ref{sec:print_lists} for details) but can also
+be used for other references if needed.
+\secidx*{Additional Commands}
+
+\section{Printing the List}\label{sec:print_lists}\secidx{Printing the List}
+Printing the whole list of acronyms is easy: just place \cmd{printacronyms}
+wherever you want the list to be.
+\begin{beschreibung}
+ \Befehl{printacronyms}{<list of classes>}\oa{<excluded classes>} \cnpkgdocarrow\
+ the first \emph{optional} (!) argument \ma{<list of classes>} takes a comma-separated
+ list of the classes of acronyms that should be in the list. If the argument is
+ left out, \emph{all} acronyms are printed. In the optional argument \oa{<excluded
+ classes>} classes can be specified that shall not be included into the list.
+\end{beschreibung}
+\begin{beispiel}[below]
+ \acsetup{hyperref=false,extra-style=comma}
+ \printacronyms[city]
+ \acsetup{list-name=City Acronyms}
+ \printacronyms{city}
+\end{beispiel}
+You can see that the default layout is a \code{description} list with a
+\code{section*} title. Both can be changed, see section~\ref{sec:customization}.
+
+The command \cmd{printacronyms} needs two \LaTeX\ runs. This is a precaution to
+avoid error messages with a possibly empty list. But since almost all documents
+need at least two runs and often are compiled much more often than that, this
+fact shouldn't cause too much inconvenience.
+\secidx*{Printing the List}
+
+\section{Customization}\label{sec:customization}\secidx{Customization}
+\subsection{General Options}\secidx[general options]{Customization}
+There are a few options which change the general behaviour of \acro.
+\default{Underlined} values are used if no value is given.
+\begin{beschreibung}
+ %%
+ \Option{single}{\default{true}|false}\Default{false} If set to \code{true} an
+ acronym that's used only once '(with \cmd{ac}) in a document will only print
+ the long form and will not be printed in the list.
+ %%
+ \Option{hyperref}{\default{true}|false}\Default{false} If set to \code{true}
+ the short forms of the acronyms will be linked to their list entry.
+ %%
+ \Option{only-used}{\default{true}|false}\Default{true} This option is \code{true}
+ as default. It means that only acronyms that are actually used in the document
+ are printed in the list. If \code{false}, all acronyms defined with \cmd{DeclareAcronym}
+ will be written to the list.
+ %%
+ \Option{macros}{\default{true}|false}\Default{false} If set to \code{true} this
+ option will create a macro \cmd{<id>} for each acronym as a shortcut for
+ \cmd{ac}{<id>}.  Already existing macros will \emph{not} be overwritten.
+ %%
+ \Option{strict}{\default{true}|false}\Default{false} If set to \code{true} and
+ the option \key{macros}{true} is in effect then already existing macros will be
+ overwritten.
+ %%
+ \Option{sort}{\default{true}|false}\Default{false} If set to \code{true} the
+ acronym list will be sorted automatically. The entries are sorted by their
+ \acs{id} ignoring upper and lower case. This option needs the experimental
+ package \paket*{l3sort} (from the \paket{l3experimental} bundle) and can only
+ be set in the preamble.
+\end{beschreibung}
+
+All options of this and the following sections can be set up either as package
+options or via the setup command:
+\begin{beschreibung}
+ \Befehl{acsetup}{<options>} set up \acro anywhere in the document. Or separate
+ package loading from setup.
+\end{beschreibung}
+
+\begin{beispiel}
+ % with \acsetup{macros}; remember I used \acresetall before
+ we could have used these before: \nato, \ny
+\end{beispiel}
+
+\subsection{Options Regarding Acronyms}\secidx[acronyms]{Customization}
+The options described in this section all influence the layout of one of the
+possible output forms of the acronyms.
+\begin{beschreibung}
+ %%
+ \Option{short-format}{<format>}\Default Sets a format for all short forms.
+ For example \key{short-format}{\cmd{scshape}} would print all short forms in
+ small caps.
+ %%
+ \Option{long-format}{<format>}\Default The same for the long forms.
+ %%
+ \Option{extra-format}{<format>}\Default The same for the extra information.
+ %%
+ \Option{first-style}{default|plain|footnote|square|short|reversed|plain-reversed}\\
+ \null\Default{default}
+ The basic style of the first appearance of an acronym.
+ %%
+ \Option{extra-style}{plain|comma|paren|bracket}\Default{plain} Defines the way
+ the extra information is printed in the list.
+ %%
+ \Option{plural-ending}{<tokenlist>}\Default{s} With this option the default
+ plural ending can be set.
+\end{beschreibung}
+
+\begin{beispiel}
+ % (Keep in mind that we're in
+ % a minipage here!)
+ \acsetup{first-style=footnote}
+ \acf{ny} \\
+ \acsetup{first-style=square}
+ \acf{ny} \\
+ \acsetup{first-style=short}
+ \acf{ny} \\
+ \acsetup{first-style=reversed}
+ \acf{ny} \\
+ \acsetup{first-style=plain}
+ \acf{ny} \\
+ \acsetup{first-style=plain-reversed}
+ \acf{ny}
+\end{beispiel}
+
+\subsection{Options Regarding the List}\secidx[list]{Customization}
+\begin{beschreibung}
+ %%
+ \Option{page-ref}{none|plain|comma|paren}\Default{none} The style with which
+ the page number of the first appearance of the acronym in the text is displayed.
+ %%
+ \Option{page-name}{<page name>}\Default{p.} The ``name'' of the page label.
+ %%
+ \Option{list-type}{table|<list>}\Default{description} This option let's you
+ choose how the list is printed. \code{<list>} can be any valid list like
+ \code{itemize} or \code{description}.
+ %%
+ \Option{list-style}{list|tabular|longtable|extra-tabular|extra-longtable|\\
+ extra-tabular-rev|extra-longtable-rev}\Default{list} If you choose
+ \key{list-type}{table} you have to specify which kind of table should be used.
+ If you choose \code{longtable}, \code{extra-longtable} or \code{extra-longtable-rev}
+ you have to load \paket{longtable} in your preamble. The values
+ \code{extra-longtable} and \code{extra-longtable-rev} put the extra information
+ in a column of its own.
+ %%
+ \Option{list-header}{chapter|chapter*|section|section*|subsection|subsection*}\\
+ The header type of the list.\Default{section*}
+ %%
+ \Option{list-name}{<list name>}\Default{Acronyms} The name of the list. This is
+ what's written in the list-header.
+ %%
+ \Option{list-table-width}\Default{.7\cmd{linewidth}} This has only an effect if
+ you chose \key{list-type}{table}. The second column (or the third if you choose
+ one of the \code{-rev} styles) of the table is a \code{p} column whose width can
+ be specified with this option.
+ %%
+ \Option{list-caps}{\default{true}|false}\Default{false} Print the first letters
+ of the long form capitalized.
+\end{beschreibung}
+
+If you for example have loaded \paket{enumitem} you can define a custom list for
+the acronym list:
+\begin{beispiel}
+ % preamble:
+ % \usepackage{enumitem}
+ \newlist{acronyms}{description}{1}
+ \newcommand*\addcolon[1]{#1:}
+ \setlist[acronyms]{labelwidth=3em,leftmargin=3.5em,noitemsep,itemindent=0pt,font=\addcolon}
+ \acsetup{list-type=acronyms,hyperref=false,extra-style=comma}
+ \printacronyms
+\end{beispiel}
+\secidx*{Customization}
+
+\section{hyperref Support}\secidx{\paket{hyperref} support}[hyperref Support]
+The option \key{hyperref}{true} adds internal links from all short (or alternative)
+forms to their respective list entries. Of course this only works if you have
+loaded the \paket{hyperref} package in your preamble. You should use this option
+with care: if you don't use \cmd{printacronyms} anywhere this option will result
+in loads of \paket{hyperref} warnings. Also printing several lists can result in
+warnings if don't clearly separate the lists into different classes. If an acronym
+appears in more than one list there will also be more than one hypertarget for this
+acronym.
+\secidx*{\paket{hyperref} support}[hyperref Support]
+
+\appendix
+\section{All Acronyms Used in this Documentation}\label{sec:documentation_acronyms}
+\begin{beispiel}[code only]
+ \acsetup{
+   list-type   = table,
+   list-style  = longtable,
+   list-header = subsection*,
+   extra-style = comma,
+   page-ref    = comma,
+   list-name   = All Acronyms}
+ \printacronyms
+\end{beispiel}
+\acsetup{
+  list-type   = table,
+  list-style  = longtable,
+  list-header = subsection*,
+  extra-style = comma,
+  page-ref    = comma,
+  list-name   = All Acronyms}
+\printacronyms
+
+\begin{beispiel}[code only]
+ \acsetup{
+   list-type   = table,
+   list-style  = longtable,
+   list-header = subsection*,
+   page-ref    = comma,
+   list-name   = City-Acronyms}
+ \printacronyms{city}
+\end{beispiel}
+\acsetup{list-name=City-Acronyms}
+\printacronyms{city}
+
+{\RaggedRight\EmbracOff
+\printbibliography}
+
+\setindexpreamble{Section titles are indicated \textbf{bold}, packages
+\textsf{sans serif}, commands \code{\textbackslash\textcolor{code}{brown}}
+ and options \textcolor{key}{\code{yellow}}.\par\bigskip}
+\printindex
+\end{document}
\ No newline at end of file
diff --git a/Master/texmf-dist/doc/latex/acro/example_one.tex b/Master/texmf-dist/doc/latex/acro/example_one.tex
new file mode 100644
index 00000000000..e2bff36d42c
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/acro/example_one.tex
@@ -0,0 +1,46 @@
+% arara: pdflatex
+% arara: pdflatex
+\documentclass{scrartcl}
+\usepackage[T1]{fontenc}
+\usepackage[utf8]{inputenc}
+\usepackage{acro}
+\acsetup{
+  page-ref    = paren,% Seitennummer in Klammern
+  extra-style = comma,% extra-Informationen mit Komma anhängen
+  only-used   = false,% für das Beispiel auch die nicht verwendeten in die Liste aufnehmen
+  sort        = true  % Liste sortieren
+}
+
+\usepackage{longtable,siunitx}
+
+\DeclareAcronym{ecm}{ECM}  {Electro Chemical Machining}{Elektrochemisches Abtragen}
+\DeclareAcronym{adc}{ADC}  {Analog-to-Digital-Converter}
+\DeclareAcronym{edm}{EDM}  {Electro Discharge Machining}
+\DeclareAcronym{ecdm}{ECDM}{Electro Chemical Discharge Machining}{Kombination aus \acs{ecm} und \acs{edm}}
+
+% "Acronyme" (tatsächlich physikalische Größen) einer speziellen Klasse:
+\DeclareAcronym{f}{\ensuremath{f}}{Frequenz}{\si{\hertz}}[physics]
+\DeclareAcronym{A}{\ensuremath{A}}{Fläche}{\si{\metre^2}}[physics]
+\DeclareAcronym{C}{\ensuremath{C}}{Kapazität}{\si{\farad}}[physics]
+\DeclareAcronym{F}{\ensuremath{F}}{Kraft}{\si{\newton}}[physics]
+
+\begin{document}
+
+erstes Mal: \ac{ecm}
+
+zweites Mal: \ac{ecm}
+
+% alle außer der Klasse 'physics' auflisten:
+\acsetup{list-name=Abkürzungsverzeichnis}
+\printacronyms[physics]
+
+% nur die Klasse 'physics' auflisten:
+\acsetup{
+  list-name   = Formelverzeichnis,
+  list-type   = table,
+  list-style  = extra-longtable-rev,
+  extra-style = plain
+}
+\printacronyms{physics}
+
+\end{document}
\ No newline at end of file
diff --git a/Master/texmf-dist/doc/latex/acro/example_two.tex b/Master/texmf-dist/doc/latex/acro/example_two.tex
new file mode 100644
index 00000000000..75b009e33d0
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/acro/example_two.tex
@@ -0,0 +1,66 @@
+% arara: pdflatex
+% arara: pdflatex
+% this file is an adapted version of acrotest.tex shipped out with the `acronym'
+% package
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage{acro}
+\acsetup{sort,page-ref=comma,extra-style=paren,hyperref}
+
+\DeclareAcronym{CDMA}{CDMA}{Code Division Multiple Access}
+\DeclareAcronym{GSM}{GSM}{Global System for Mobile communication}
+\DeclareAcronym{NA}{\ensuremath{N_{\mathrm A}}}{Number of Avogadro}{see \S\ref{Chem}}
+\DeclareAcronym{NAD+}{NAD\textsuperscript{+}}{Nicotinamide Adenine Dinucleotide}
+\DeclareAcronym{NUA}{NUA}{Not Used Acronym}
+\DeclareAcronym{TDMA}{TDMA}{Time Division Multiple Access}
+\DeclareAcronym{UA}{UA}{Used Acronym}
+\DeclareAcronym{lox}{\ensuremath{LOX}}{Liquid Oxygen}%
+\DeclareAcronym{lh2}{\ensuremath{LH_2}}{Liquid Hydrogen}%
+\DeclareAcronym{IC}{IC}{Integrated Circuit}%
+\DeclareAcronym*{BUT}{BUT}{Block Under Test,Blocks Under Test}%
+\begin{document}
+
+\section{Intro}
+In the early nineties, \acs{GSM} was deployed in many European
+countries. \ac{GSM} offered for the first time international
+roaming for mobile subscribers. The \acs{GSM}'s use of \ac{TDMA} as
+its communication standard was debated at length. And every now
+and then there are big discussion whether \ac{CDMA} should have
+been chosen over \ac{TDMA}.
+
+\section{Furthermore}
+\acreset
+The reader could have forgotten all the nice acronyms, so we repeat the
+meaning again.
+
+If you want to know more about \acf{GSM}, \acf{TDMA}, \acf{CDMA}
+and other acronyms, just read a book about mobile communication. Just
+to mention it: There is another \ac{UA}, just for testing purposes!
+
+\begin{figure}[h]
+Figure
+\caption{A float also admits references like \ac{GSM} or \acf{CDMA}.}
+\end{figure}
+
+\subsection{Some chemistry and physics}
+\label{Chem}
+\ac{NAD+} is a major electron acceptor in the oxidation
+of fuel molecules. The reactive part of \ac{NAD+} is its nictinamide
+ring, a pyridine derivate.
+
+One mol consists of \acs{NA} atoms or molecules. There is a relation
+between the constant of Boltzmann and the \acl{NA}:
+\begin{equation}
+  k = R/\acs{NA}
+\end{equation}
+
+\acl{lox}/\acl{lh2} (\acs{lox}/\acs{lh2})
+
+\subsection{Some testing fundamentals}
+When testing \acp{IC}, one typically wants to identify functional
+blocks to be tested separately. The latter are commonly indicated as
+\acp{BUT}. To test a \ac{BUT} requires defining a testing strategy\dots
+
+\printacronyms
+
+\end{document}
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/latex/acro/acro.sty b/Master/texmf-dist/tex/latex/acro/acro.sty
new file mode 100644
index 00000000000..6b5cb5cd1ce
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/acro/acro.sty
@@ -0,0 +1,1119 @@
+% --------------------------------------------------------------------------
+% the ACRO package
+% 
+%   Typeset Acronyms
+% 
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    https://bitbucket.org/cgnieder/acro/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2011-2012 Clemens Niederberger
+% 
+% 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'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% --------------------------------------------------------------------------
+% The acro package consists of the files
+%  - acro.sty, acro_en.tex, acro_en.pdf, README
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+\RequirePackage{expl3,xparse,l3keys2e,xtemplate}
+\ProvidesExplPackage
+  {acro}
+  {2012/07/23}
+  {0.3d}
+  {Typeset Acronyms}
+
+% error messages:
+\msg_new:nnnn { acro } { undefined }
+  { You've~requested~acronym~`#1'~but~it~seems~that~it~was~never~defined! }
+  {
+    You've~requested~acronym~`#1'~\msg_line_context: \c_space_tl but~you~
+    apperantly~haven't~defined~it,~yet!~Maybe~you've~mispelled~it?
+  }
+
+% boolean variables:
+\bool_new:N \l_acro_use_single_bool
+\bool_new:N \l_acro_print_only_used_bool
+\bool_set_true:N \l_acro_print_only_used_bool
+\bool_new:N \l_acro_use_plural_bool
+\bool_new:N \l_acro_hyperref_loaded_bool
+\bool_new:N \l_acro_use_hyperref_bool
+\bool_new:N \l_acro_custom_format_bool
+\bool_new:N \l_acro_strict_bool
+\bool_new:N \l_acro_create_macros_bool
+\bool_new:N \l_acro_first_upper_bool
+\bool_new:N \l_acro_sort_bool
+\bool_new:N \l_acro_capitalize_list_bool
+
+% tokenlist variables:
+\tl_new:N   \l_acro_short_format_tl
+\tl_new:N   \l_acro_long_format_tl
+\tl_new:N   \l_acro_extra_format_tl
+\tl_new:N   \l_acro_first_instance_tl
+\tl_set:Nn  \l_acro_first_instance_tl { default }
+\tl_new:N   \l_acro_extra_instance_tl
+\tl_set:Nn  \l_acro_extra_instance_tl { default }
+\tl_new:N   \l_acro_page_instance_tl
+\tl_set:Nn  \l_acro_page_instance_tl  { none }
+\tl_new:N   \l_acro_page_name_tl
+\tl_set:Nn  \l_acro_page_name_tl      { p. }
+\tl_new:N   \l_acro_list_instance_tl
+\tl_set:Nn  \l_acro_list_instance_tl  { list }
+\tl_new:N   \l_acro_list_type_tl
+\tl_set:Nn  \l_acro_list_type_tl      { description }
+\tl_new:N   \l_acro_list_title_tl
+\tl_set:Nn  \l_acro_list_title_tl     { section* }
+\tl_new:N   \l_acro_list_name_tl
+\tl_set:Nn  \l_acro_list_name_tl      { Acronyms }
+\tl_new:N   \l_acro_short_tl
+\tl_new:N   \l_acro_short_plural_tl
+\tl_new:N   \l_acro_default_plural_tl
+\tl_set:Nn  \l_acro_default_plural_tl { s }
+\tl_new:N   \l_acro_alt_tl
+\tl_new:N   \l_acro_long_tl
+\tl_new:N   \l_acro_custom_format_tl
+\tl_new:N   \l_acro_first_between_tl
+
+% property list variables:
+\prop_new:N \l_acro_short_prop
+\prop_new:N \l_acro_alt_prop
+\prop_new:N \l_acro_long_prop
+\prop_new:N \l_acro_class_prop
+\prop_new:N \l_acro_replace_plural_prop
+\prop_new:N \l_acro_short_plural_prop
+\prop_new:N \l_acro_long_plural_prop
+\prop_new:N \l_acro_extra_prop
+\prop_new:N \l_acro_format_prop
+
+% length variables:
+\dim_new:N  \l_acro_table_width_dim
+\dim_set:Nn \l_acro_table_width_dim { .7\linewidth }
+
+% options:
+\keys_define:nn { acro }
+  {
+    macros           .bool_set:N = \l_acro_create_macros_bool   ,
+    strict           .bool_set:N = \l_acro_strict_bool          ,
+    sort             .bool_set:N = \l_acro_sort_bool            ,
+    short-format     .tl_set:N   = \l_acro_short_format_tl      ,
+    long-format      .tl_set:N   = \l_acro_long_format_tl       ,
+    extra-format     .tl_set:N   = \l_acro_extra_format_tl      ,
+    single           .bool_set:N = \l_acro_use_single_bool      ,
+    first-style      .tl_set:N   = \l_acro_first_instance_tl    ,
+    extra-style      .tl_set:N   = \l_acro_extra_instance_tl    ,
+    page-ref         .tl_set:N   = \l_acro_page_instance_tl     ,
+    page-name        .tl_set:N   = \l_acro_page_name_tl         ,
+    list-style       .tl_set:N   = \l_acro_list_instance_tl     ,
+    list-type        .tl_set:N   = \l_acro_list_type_tl         ,
+    list-header      .tl_set:N   = \l_acro_list_title_tl        ,
+    list-name        .tl_set:N   = \l_acro_list_name_tl         ,
+    list-table-width .dim_set:N  = \l_acro_table_width_dim      ,
+    hyperref         .bool_set:N = \l_acro_use_hyperref_bool    ,
+    only-used        .bool_set:N = \l_acro_print_only_used_bool ,
+    plural-ending    .tl_set:N   = \l_acro_default_plural_tl    ,
+    list-caps        .bool_set:N = \l_acro_capitalize_list_bool ,
+  }
+
+% setup command:
+\NewDocumentCommand \acsetup { m }
+  { \keys_set:nn { acro } { #1 } \ignorespaces }
+
+% --------------------------------------------------------------------------
+% adding an acronym, internal command:
+% #1: use/replace plural (boolean)
+% #2: id
+% #3: short
+% #4: short plural
+% #5: alt
+% #6: long
+% #7: long plural
+% #8: class
+% #9: extra
+\cs_new:Npn \acro_new:nnnnnnnnn #1#2#3#4#5#6#7#8#9
+  {
+    \IfBooleanTF { #1 }
+      { \prop_put:Nnn \l_acro_replace_plural_prop { #2 } { \c_true_bool } }
+      { \prop_put:Nnn \l_acro_replace_plural_prop { #2 } { \c_false_bool } }
+    \prop_put:Nnn \l_acro_short_prop { #2 } { #3 }
+    \IfNoValueTF { #4 }
+      { \prop_put:Nnn \l_acro_short_plural_prop { #2 } { \l_acro_default_plural_tl } }
+      { \prop_put:Nnn \l_acro_short_plural_prop { #2 } { #4 } }
+    \IfNoValueTF { #5 }
+      { \prop_put:Nnn \l_acro_alt_prop { #2 } { #2 } }
+      { \prop_put:Nnn \l_acro_alt_prop { #2 } { #5 } }
+    \prop_put:Nnn \l_acro_long_prop { #2 } { #6 }
+    \IfNoValueTF { #7 }
+      { \prop_put:Nnn \l_acro_long_plural_prop { #2 } { \l_acro_default_plural_tl } }
+      { \prop_put:Nnn \l_acro_long_plural_prop { #2 } { #7 } }
+    \IfNoValueF { #8 }
+      { \prop_put:Nnn \l_acro_class_prop { #2 } { #8} }
+    \IfNoValueF { #9 }
+      { \prop_put:Nnn \l_acro_extra_prop { #2 } { #9 } }
+    \bool_new:c { g_acro_#2_used_bool }
+    \bool_new:c { g_acro_#2_label_bool }
+    \bool_if:NT \l_acro_create_macros_bool
+      {
+        \cs_if_exist:cTF { #2 }
+          {
+            \bool_if:NT \l_acro_strict_bool
+              { \cs_set:cpn { #2 } { \ac { #2 } } }
+          }
+          { \cs_new:cpn { #2 } { \ac { #2 } } }
+      }
+  }
+
+% typeset the short form:
+\cs_new:Npn \acro_write_short:n #1
+  {
+    \mode_if_horizontal:F { \leavevmode }
+    \group_begin:
+      \bool_if:NTF \l_acro_custom_format_bool
+        { \l_acro_custom_format_tl }
+        { \l_acro_short_format_tl }
+      { \hbox:n { #1 } }
+    \group_end:
+    \bool_if:NT \l_acro_use_plural_bool
+      { \tl_use:N \l_acro_short_plural_tl }
+  }
+\cs_generate_variant:Nn \acro_write_short:n { V }
+
+% typeset the longform,...:
+\cs_new:Npn \acro_write:Nn #1#2
+  {
+    \mode_if_horizontal:F { \leavevmode }
+    \group_begin:
+      \tl_use:N #1
+      \bool_if:NTF \l_acro_first_upper_bool
+        { \tl_to_uppercase:n { \tl_head:n { #2 } } \tl_tail:n { #2 } }
+        { #2 }
+    \group_end:
+  }
+\cs_generate_variant:Nn \acro_write:Nn { NV,No,Nf }
+
+% --------------------------------------------------------------------------
+% hyperref support
+\cs_new_eq:NN \acro_hyper_target:nn \use_ii:nn
+\cs_new_eq:NN \acro_hyper_link:nn \use_ii:nn
+
+\cs_new:Npn \acro_activate_hyperref_support:
+  {
+    \bool_if:nT { \l_acro_hyperref_loaded_bool && \l_acro_use_hyperref_bool }
+      {
+        \cs_set_eq:NN \acro_hyper_link:nn \hyperlink
+        \cs_set:Npn \acro_hyper_target:nn ##1##2
+          { \raisebox { 3ex } [ 0pt ] { \hypertarget { ##1 } { } } ##2 }
+      }
+  }
+
+\cs_new:Npn \acro_make_link:nNN #1#2#3
+  {
+    \tl_set:Nn #2
+       {
+         \acro_hyper_link:nn { #1 } { \phantom { #3 } }
+         \acro_is_single:nTF { #1 } { \hbox_overlap_left:n { #3 } }
+           {
+             \bool_if:nTF { \l_acro_use_hyperref_bool && \l_acro_hyperref_loaded_bool }
+               { \textcolor { \@linkcolor } { \hbox_overlap_left:n { #3 } } }
+               { \hbox_overlap_left:n { #3 } }
+           }
+       }
+  }
+
+% --------------------------------------------------------------------------
+% output style of the first time an acronym is used
+\bool_new:N \l_acro_first_use_brackets_bool
+\bool_new:N \l_acro_first_only_short_bool
+\bool_new:N \l_acro_first_reversed_bool
+\tl_new:N   \l_acro_first_brackets_tl
+
+% #1: short
+% #2: long
+\DeclareObjectType { acro-first } { 2 }
+
+\DeclareTemplateInterface { acro-first } { text } { 2 }
+  {
+    brackets      : boolean   = true  ,
+    brackets-type : tokenlist = ()    ,
+    only-short    : boolean   = false ,
+    reversed      : boolean   = false ,
+    between       : tokenlist         ,
+  }
+\DeclareTemplateCode { acro-first } { text } { 2 }
+  {
+    brackets      = \l_acro_first_use_brackets_bool ,
+    brackets-type = \l_acro_first_brackets_tl       ,
+    only-short    = \l_acro_first_only_short_bool   ,
+    reversed      = \l_acro_first_reversed_bool     ,
+    between       = \l_acro_first_between_tl        ,
+  }
+  {
+    \AssignTemplateKeys
+    \bool_if:nT { !\l_acro_first_only_short_bool && !\l_acro_first_reversed_bool }
+      {
+        \acro_write:No \l_acro_long_format_tl { #2 }
+        \tl_use:N \c_space_tl
+        \tl_if_blank:VF \l_acro_first_between_tl
+          {
+            \tl_use:N \l_acro_first_between_tl
+            \tl_use:N \c_space_tl
+          }
+      }
+    \bool_if:nT { \l_acro_first_use_brackets_bool && !\l_acro_first_reversed_bool }
+      { \tl_head:N \l_acro_first_brackets_tl }
+    \acro_write_short:n { #1 }
+    \bool_if:nT { \l_acro_first_use_brackets_bool && !\l_acro_first_reversed_bool }
+      { \tl_tail:N \l_acro_first_brackets_tl }
+    \bool_if:nT { !\l_acro_first_only_short_bool && \l_acro_first_reversed_bool }
+      {
+        \tl_if_blank:VF \l_acro_first_between_tl
+          {
+            \tl_use:N \c_space_tl
+            \tl_use:N \l_acro_first_between_tl
+          }
+        \tl_use:N \c_space_tl
+        \bool_if:nT { \l_acro_first_use_brackets_bool && \l_acro_first_reversed_bool }
+          { \tl_head:N \l_acro_first_brackets_tl }
+        \acro_write:No \l_acro_long_format_tl { #2 }
+        \bool_if:nT { \l_acro_first_use_brackets_bool && \l_acro_first_reversed_bool }
+          { \tl_tail:N \l_acro_first_brackets_tl }
+      }
+  }
+
+\DeclareTemplateInterface { acro-first } { footnote } { 2 } { }
+\DeclareTemplateCode { acro-first } { footnote } { 2 } { }
+  {
+    \AssignTemplateKeys
+    \acro_write_short:n { #1 }
+    \footnote { \acro_write:No \l_acro_long_format_tl { #2 } } 
+  }
+
+% the different styles:
+\DeclareInstance { acro-first } { default        } { text     } { }
+\DeclareInstance { acro-first } { square         } { text     }
+  { brackets-type = [] }
+\DeclareInstance { acro-first } { plain          } { text     }
+  { brackets = false , between = -- }
+\DeclareInstance { acro-first } { plain-reversed } { text     }
+  { brackets = false , between = -- , reversed = true }
+\DeclareInstance { acro-first } { footnote       } { footnote } { }
+\DeclareInstance { acro-first } { short          } { text     }
+  { only-short = true , brackets = false }
+\DeclareInstance { acro-first } { reversed       } { text     }
+  { reversed = true }
+
+% --------------------------------------------------------------------------
+% formatting the extras information:
+\bool_new:N \l_acro_extra_punct_bool
+\bool_new:N \l_acro_extra_use_brackets_bool
+\tl_new:N   \l_acro_extra_brackets_tl
+\tl_new:N   \l_acro_extra_punct_tl
+
+\DeclareObjectType { acro-extra } { 1 }
+
+\DeclareTemplateInterface { acro-extra } { default } { 1 }
+  {
+    punct         : boolean   = false ,
+    punct-symbol  : tokenlist = {,}   ,
+    brackets      : boolean   = true  ,
+    brackets-type : tokenlist = ()
+  }
+
+\DeclareTemplateCode { acro-extra } { default } { 1 }
+  {
+    punct         = \l_acro_extra_punct_bool        ,
+    punct-symbol  = \l_acro_extra_punct_tl          ,
+    brackets      = \l_acro_extra_use_brackets_bool ,
+    brackets-type = \l_acro_extra_brackets_tl
+  }
+  {
+    \AssignTemplateKeys
+    \bool_if:NT \l_acro_extra_punct_bool
+      { \tl_use:N \l_acro_extra_punct_tl \tl_use:N \c_space_tl }
+    \bool_if:NT \l_acro_extra_use_brackets_bool
+      { \tl_head:N \l_acro_extra_brackets_tl }
+    \acro_write:Nn \l_acro_extra_format_tl { #1 }
+    \bool_if:NT \l_acro_extra_use_brackets_bool
+      { \tl_tail:N \l_acro_extra_brackets_tl }
+  }
+
+% the different styles:
+\DeclareInstance { acro-extra } { default } { default }
+  { brackets = false , punct = true , punct-symbol = . }
+\DeclareInstance { acro-extra } { plain   } { default }
+  { brackets = false , punct = false }
+\DeclareInstance { acro-extra } { paren   } { default } { }
+\DeclareInstance { acro-extra } { bracket } { default } { brackets-type=[] }
+\DeclareInstance { acro-extra } { comma   } { default }
+  { punct = true, brackets = false }
+
+% --------------------------------------------------------------------------
+% outputting the page number:
+\bool_new:N \l_acro_page_punct_bool
+\bool_new:N \l_acro_page_display_bool
+\tl_new:N   \l_acro_page_punct_tl
+\dim_new:N  \l_acro_page_space_dim
+
+\cs_new:Npn \acro_no_break: { \tex_penalty:D \c_ten_thousand }
+
+\DeclareObjectType { acro-page-number } { 1 }
+
+\DeclareTemplateInterface { acro-page-number } { default } { 1 }
+  {
+    display       : boolean   = true  ,
+    punct         : boolean   = false ,
+    punct-symbol  : tokenlist = {,}   ,
+    brackets      : boolean   = false ,
+    brackets-type : tokenlist = ()    ,
+    space         : length    = .3ex  ,
+    name          : tokenlist         ,
+  }
+
+\DeclareTemplateCode { acro-page-number } { default } { 1 }
+  {
+    display       = \l_acro_page_display_bool  ,
+    punct         = \l_acro_page_punct_bool    ,
+    punct-symbol  = \l_acro_page_punct_tl      ,
+    brackets      = \l_acro_page_brackets_bool ,
+    brackets-type = \l_acro_page_brackets_tl   ,
+    space         = \l_acro_page_space_dim     ,
+    name          = \l_acro_page_name_tl       ,
+  }
+  {
+    \AssignTemplateKeys
+    \bool_if:NT \l_acro_page_display_bool
+      {
+        \bool_if:NT \l_acro_page_punct_bool
+          { \tl_use:N \l_acro_page_punct_tl }
+        \tl_use:N \c_space_tl
+        \bool_if:NT \l_acro_page_brackets_bool
+          { \tl_head:N \l_acro_page_brackets_tl }
+        \tl_use:N \l_acro_page_name_tl
+        \acro_no_break:
+        \skip_horizontal:N \l_acro_page_space_dim
+        \acro_no_break:
+        \pageref { ac:#1 }
+        \bool_if:NT \l_acro_page_brackets_bool
+          { \tl_tail:N \l_acro_page_brackets_tl }
+      }
+  }
+
+% the different styles:
+\DeclareInstance { acro-page-number } { default } { default }
+  { punct = true , punct-symbol = . }
+\DeclareInstance { acro-page-number } { plain   } { default }
+  { punct = false }
+\DeclareInstance { acro-page-number } { comma   } { default } { punct = true }
+\DeclareInstance { acro-page-number } { paren   } { default }
+  { brackets=true , punct-symbol = ~ }
+\DeclareInstance { acro-page-number } { none    } { default }
+  { display = false }
+
+% --------------------------------------------------------------------------
+% the title of the list:
+\cs_new:Npn \acro_list_title_format:n #1 { #1 }
+
+\DeclareObjectType { acro-title } { 1 }
+
+\DeclareTemplateInterface { acro-title } { sectioning } { 1 }
+  { name-format : function 1 = #1 }
+
+\DeclareTemplateCode { acro-title } { sectioning } { 1 }
+  { name-format = \acro_list_title_format:n }
+  {
+    \AssignTemplateKeys
+    \acro_list_title_format:n { #1 }
+  }
+
+% the different styles:
+\DeclareInstance { acro-title } { chapter*    } { sectioning }
+  { name-format = \chapter* { #1 } }
+\DeclareInstance { acro-title } { part*       } { sectioning }
+  { name-format = \part* { #1 } }
+\DeclareInstance { acro-title } { section*    } { sectioning }
+  { name-format = \section* { #1 } }
+\DeclareInstance { acro-title } { subsection* } { sectioning }
+  { name-format = \subsection* { #1 } }
+\DeclareInstance { acro-title } { chapter     } { sectioning }
+  { name-format = \chapter { #1 } }
+\DeclareInstance { acro-title } { part        } { sectioning }
+  { name-format = \part { #1 } }
+\DeclareInstance { acro-title } { section     } { sectioning }
+  { name-format = \section { #1 } }
+\DeclareInstance { acro-title } { subsection  } { sectioning }
+  { name-format = \subsection { #1 } }
+
+% --------------------------------------------------------------------------
+% outputting the whole list
+\DeclareObjectType { acro-list } { 3 }
+
+% excluded items:
+\bool_new:N \l_acro_is_excluded_bool
+\cs_generate_variant:Nn \tl_if_eq:nnT { nV }
+% #1: id
+% #2: excluded classes
+% #3: continue if not excluded
+\cs_new:Npn \acro_is_excluded:nnF #1#2#3
+  {
+    \bool_set_false:N \l_acro_is_excluded_bool
+    \IfNoValueTF { #2 }
+      { #3 }
+      {
+        \clist_map_inline:nn { #2 }
+          {
+            \prop_get:NnN \l_acro_class_prop { #1 } \l_tmpa_tl
+            \tl_if_eq:nVT { ##1 } \l_tmpa_tl
+              { \bool_set_true:N \l_acro_is_excluded_bool }
+          }
+        \bool_if:NF \l_acro_is_excluded_bool { #3 }
+      }
+  }
+
+% build the list, dummy functions to be redefined in the template code:
+\cs_new:Npn \acro_print_list_short:nn #1#2 { }
+\cs_new:Npn \acro_print_list_long:n   #1   { }
+\cs_new:Npn \acro_print_list_extra:n  #1   { }
+\cs_new:Npn \acro_print_list_page:n   #1   { }
+
+% Test, if acronyms should be printed or not; needs testing for in/excluded
+% classes and options `only-used' and `single':
+\cs_new:Npn \acro_list_allow_items:nn #1#2
+  {
+    \prop_map_inline:Nn \l_acro_short_prop
+      {
+        \acro_get:n { ##1 }
+        \bool_if:nT
+          {
+            ( \l_acro_use_single_bool && \cs_if_exist_p:c { acro@##1@twice } ) ||
+            ( !\l_acro_use_single_bool && \cs_if_exist_p:c { acro@##1@once } && \l_acro_print_only_used_bool ) ||
+            ( !\l_acro_use_single_bool && !\l_acro_print_only_used_bool )
+          }
+          {
+            \acro_is_excluded:nnF { ##1 } { #2 }
+              {
+                \tl_if_blank:nTF { #1 }
+                  {
+                    \acro_print_list_short:nn { ##1 } { ##2 }
+                    \bool_if:NT \l_acro_capitalize_list_bool
+                      { \bool_set_true:N \l_acro_first_upper_bool }
+                    \acro_print_list_long:n { ##1 }
+                    \bool_set_false:N \l_acro_first_upper_bool
+                    \acro_print_list_extra:n { ##1 }
+                    \acro_print_list_page:n { ##1 }
+                  }
+                  {
+                    \clist_map_inline:nn { #1 }
+                      {
+                        \prop_get:NnNT \l_acro_class_prop { ##1 } \l_tmpa_tl
+                          {
+                            \tl_set:Nn \l_tmpb_tl { ####1 }
+                            \tl_trim_spaces:N \l_tmpa_tl
+                            \tl_trim_spaces:N \l_tmpb_tl
+                            \tl_if_eq:NNT \l_tmpa_tl \l_tmpb_tl
+                              {
+                                \acro_print_list_short:nn { ##1 } { ##2 }
+                                \bool_if:NT \l_acro_capitalize_list_bool
+                                  { \bool_set_true:N \l_acro_first_upper_bool }
+                                \acro_print_list_long:n { ##1 }
+                                \bool_set_false:N \l_acro_first_upper_bool
+                                \acro_print_list_extra:n { ##1 }
+                                \acro_print_list_page:n { ##1 }
+                              }
+                          }
+                      }
+                  }
+              }
+          }
+      }
+  }
+
+% list template:
+\DeclareTemplateInterface { acro-list } { list } { 3 }
+  {  }
+
+\DeclareTemplateCode { acro-list } { list } { 3 }
+  {  }
+  {
+    \AssignTemplateKeys
+    \acro_activate_hyperref_support:
+    \cs_set:Npn \acro_print_list_short:nn ##1##2
+      { \item [ \acro_hyper_target:nn { ##1 } { \acro_write_short:n { ##2 } } ] }
+    \cs_set:Npn \acro_print_list_long:n ##1
+      { \acro_write:Nf \l_acro_long_format_tl { \prop_get:Nn \l_acro_long_prop { ##1 } } }
+    \cs_set:Npn \acro_print_list_extra:n ##1
+      {
+        \prop_get:NnNT \l_acro_extra_prop { ##1 } \l_tmpa_tl
+          {
+            \UseInstance { acro-extra } { \l_acro_extra_instance_tl }
+              { \l_tmpa_tl }
+          }
+      }
+    \cs_set:Npn \acro_print_list_page:n ##1
+      {
+        \bool_if:nT { \cs_if_exist_p:c { acro@##1@once } }
+          { \UseInstance { acro-page-number } { \l_acro_page_instance_tl } { ##1 } }
+      }
+    \begin { #1 }
+      \acro_list_allow_items:nn { #2 } { #3 }
+    \end { #1 }
+  }
+
+% table template:
+\tl_new:N \l_acro_list_table_tl
+\tl_new:N \l_acro_list_table_spec_tl
+
+\DeclareTemplateInterface { acro-list } { table } { 3 }
+  {
+    table      : tokenlist = longtable         ,
+    table-spec : tokenlist = lp{\l_acro_table_width_dim}
+  }
+
+\DeclareTemplateCode { acro-list } { table } { 3 }
+  {
+    table      = \l_acro_list_table_tl      ,
+    table-spec = \l_acro_list_table_spec_tl
+  }
+  {
+    \AssignTemplateKeys
+    \acro_activate_hyperref_support:
+    \cs_set:Npn \acro_print_list_short:nn ##1##2
+      { \acro_hyper_target:nn { ##1 } { \acro_write_short:n { ##2 } } & }
+    \cs_set:Npn \acro_print_list_long:n ##1
+      { \acro_write:Nf \l_acro_long_format_tl { \prop_get:Nn \l_acro_long_prop { ##1 } } }
+    \cs_set:Npn \acro_print_list_extra:n ##1
+      {
+        \prop_get:NnNT \l_acro_extra_prop { ##1 } \l_tmpa_tl
+          {
+            \UseInstance { acro-extra } { \l_acro_extra_instance_tl }
+              { \l_tmpa_tl }
+          }
+      }
+    \cs_set:Npn \acro_print_list_page:n ##1
+      {
+        \bool_if:nT { \cs_if_exist_p:c { acro@##1@once } }
+          { \UseInstance { acro-page-number } { \l_acro_page_instance_tl } { ##1 } }
+        \tabularnewline
+      }
+    \exp_args:Noo \begin { \l_acro_list_table_tl } { \l_acro_list_table_spec_tl }
+      \acro_list_allow_items:nn { #2 } { #3 }
+    \exp_args:No \end { \l_acro_list_table_tl }
+  }
+
+% extra-table template:
+\DeclareTemplateInterface { acro-list } { extra-table } { 3 }
+  {
+    table      : tokenlist = longtable         ,
+    table-spec : tokenlist = lp{\l_acro_table_width_dim}ll
+  }
+
+\DeclareTemplateCode { acro-list } { extra-table } { 3 }
+  {
+    table      = \l_acro_list_table_tl      ,
+    table-spec = \l_acro_list_table_spec_tl
+  }
+  {
+    \AssignTemplateKeys
+    \acro_activate_hyperref_support:
+    \cs_set:Npn \acro_print_list_short:nn ##1##2
+      { \acro_hyper_target:nn { ##1 } { \acro_write_short:n { ##2 } } & }
+    \cs_set:Npn \acro_print_list_long:n ##1
+      { \acro_write:Nf \l_acro_long_format_tl { \prop_get:Nn \l_acro_long_prop { ##1 } } & }
+    \cs_set:Npn \acro_print_list_extra:n ##1
+      {
+        \prop_get:NnNT \l_acro_extra_prop { ##1 } \l_tmpa_tl
+          {
+            \UseInstance { acro-extra } { \l_acro_extra_instance_tl }
+              { \l_tmpa_tl }
+          }
+        &
+      }
+    \cs_set:Npn \acro_print_list_page:n ##1
+      {
+        \bool_if:nT { \cs_if_exist_p:c { acro@##1@once } }
+          { \UseInstance { acro-page-number } { \l_acro_page_instance_tl } { ##1 } }
+        \tabularnewline
+      }
+    \exp_args:Noo \begin { \l_acro_list_table_tl } { \l_acro_list_table_spec_tl }
+      \acro_list_allow_items:nn { #2 } { #3 }
+    \exp_args:No \end { \l_acro_list_table_tl }
+  }
+
+% extra-table-rev template:
+\DeclareTemplateInterface { acro-list } { extra-table-rev } { 3 }
+  {
+    table      : tokenlist = longtable         ,
+    table-spec : tokenlist = llp{\l_acro_table_width_dim}l
+  }
+
+\DeclareTemplateCode { acro-list } { extra-table-rev } { 3 }
+  {
+    table      = \l_acro_list_table_tl      ,
+    table-spec = \l_acro_list_table_spec_tl
+  }
+  {
+    \AssignTemplateKeys
+    \acro_activate_hyperref_support:
+    \cs_set:Npn \acro_print_list_short:nn ##1##2
+      { \acro_hyper_target:nn { ##1 } { \acro_write_short:n { ##2 } } & }
+    \cs_set:Npn \acro_print_list_extra:n ##1
+      {
+        \bool_if:NT \l_acro_capitalize_list_bool
+          { \bool_set_true:N \l_acro_first_upper_bool }
+        \acro_write:Nf \l_acro_long_format_tl
+          { \prop_get:Nn \l_acro_long_prop { ##1 } } &
+      }
+    \cs_set:Npn \acro_print_list_long:n ##1
+      {
+        \prop_get:NnNT \l_acro_extra_prop { ##1 } \l_tmpa_tl
+          {
+            \UseInstance { acro-extra } { \l_acro_extra_instance_tl }
+              { \l_tmpa_tl }
+          }
+        &
+      }
+    \cs_set:Npn \acro_print_list_page:n ##1
+      {
+        \bool_if:nT { \cs_if_exist_p:c { acro@##1@once } }
+          { \UseInstance { acro-page-number } { \l_acro_page_instance_tl } { ##1 } }
+        \tabularnewline
+      }
+    \exp_args:Noo \begin { \l_acro_list_table_tl } { \l_acro_list_table_spec_tl }
+      \acro_list_allow_items:nn { #2 } { #3 }
+    \exp_args:No \end { \l_acro_list_table_tl }
+  }
+
+% the different styles:
+\DeclareInstance { acro-list } { list }                { list }  { }
+\DeclareInstance { acro-list } { tabular }             { table }
+  { table = tabular }
+\DeclareInstance { acro-list } { longtable }           { table }
+  { table = longtable }
+\DeclareInstance { acro-list } { extra-longtable }     { extra-table }
+  { table      = longtable }
+\DeclareInstance { acro-list } { extra-tabular }       { extra-table }
+  { table      = tabular }
+\DeclareInstance { acro-list } { extra-longtable-rev } { extra-table-rev }
+  { table      = longtable }
+\DeclareInstance { acro-list } { extra-tabular-rev }   { extra-table-rev }
+  { table      = tabular }
+
+% --------------------------------------------------------------------------
+% automatic typesetting, the internals of \ac:
+% #1: id
+\cs_new:Npn \acro_use:n #1
+  {
+    % get the acronym and the plural settings:
+    \acro_get:n { #1 }
+    \acro_set_plural:n { #1 }
+    \acro_is_used:nTF { #1 }
+      {
+        % this is not the first time
+        \acro_write_short:V \l_acro_short_tl
+      }
+      {
+        % this is the first time
+        \acro_is_single:nTF { #1 }
+          { \acro_write:NV \l_acro_long_format_tl \l_acro_long_tl }
+          { 
+            \UseInstance { acro-first } { \l_acro_first_instance_tl }
+              { \l_acro_short_tl } { \l_acro_long_tl }
+          }
+      }
+  }
+
+\cs_new:Npn \acro_is_single:nTF #1#2#3
+  {
+    \bool_if:nTF { !\l_acro_use_single_bool || \cs_if_exist_p:c { acro@#1@twice } }
+      { #3 } { #2 }
+  }
+
+\cs_new:Npn \acro_is_single:nT #1#2
+  {
+    \bool_if:nF { !\l_acro_use_single_bool || \cs_if_exist_p:c { acro@#1@twice } }
+      { #2 }
+  }
+
+% --------------------------------------------------------------------------
+% some helpers we'll need more often:
+\cs_new:Npn \acro_get:n #1
+  {
+    \acro_activate_hyperref_support:
+    \prop_get:NnNF \l_acro_short_prop { #1 } \l_tmpa_tl
+      { \msg_error:nnx { acro } { undefined } { #1 } }
+    \acro_make_link:nNN { #1 } \l_acro_short_tl \l_tmpa_tl
+    \prop_get:NnN \l_acro_short_plural_prop { #1 } \l_acro_short_plural_tl
+    \prop_get:NnN \l_acro_long_prop { #1 } \l_acro_long_tl
+    \prop_get:NnN \l_acro_alt_prop { #1 } \l_tmpb_tl
+    \acro_make_link:nNN { #1 } \l_acro_alt_tl \l_tmpb_tl
+    \prop_get:NnNTF \l_acro_format_prop { #1 } \l_acro_custom_format_tl
+      { \bool_set_true:N \l_acro_custom_format_bool }
+      { \bool_set_false:N \l_acro_custom_format_bool }
+  }
+
+\cs_generate_variant:Nn \tl_put_right:Nn { NV }
+
+\cs_new:Npn \acro_set_plural:n #1
+  {
+    \bool_if:NT \l_acro_use_plural_bool
+      {
+        \bool_if:nTF { \prop_get:Nn \l_acro_replace_plural_prop { #1 } }
+          {
+            \prop_get:NnN \l_acro_short_plural_prop { #1 } \l_acro_alt_tl
+            \prop_get:NnN \l_acro_long_plural_prop { #1 } \l_acro_long_tl
+          }
+          {
+            \tl_put_right:Nn \l_acro_long_tl
+              { \prop_get:Nn \l_acro_long_plural_prop { #1 } }
+          }
+      }
+  }
+
+% --------------------------------------------------------------------------
+% enable us to know if the acronym is used only once and provide a different
+% style for that:
+\cs_new:Npn \acro_is_used:nTF #1#2#3
+  {
+    \bool_if:cTF { g_acro_#1_used_bool }
+      { \iow_now:Nx \@auxout { \string \acro@used@twice { #1 } } #2 }
+      {
+        \iow_now:Nx \@auxout { \string \acro@used@once { #1 } }
+        \bool_if:cF { g_acro_#1_label_bool }
+          {
+            \bool_gset_true:c { g_acro_#1_label_bool }
+            \label{ac:#1}
+          }
+        \bool_gset_true:c { g_acro_#1_used_bool }
+        #3
+      }
+  }
+
+\cs_new:Npn \acro_is_used:n #1
+  { \acro_is_used:nTF { #1 } { } { } }
+
+\cs_new:Npn \acro@used@once #1
+  { \expandafter\xdef\csname acro@#1@once \endcsname { #1 } }
+\cs_new:Npn \acro@used@twice #1
+  { \expandafter\xdef\csname acro@#1@twice \endcsname { #1 } }
+
+\AtEndDocument
+  {
+    \cs_set:Npn \acro@used@twice #1
+      {
+        \def\reserved@a{#1}%
+        \expandafter\ifx\csname acro@#1@twice \endcsname\reserved@a\else
+        \@tempswatrue\fi
+      }
+  }
+
+% --------------------------------------------------------------------------
+% the standard internals:
+\cs_new:Npn \acro_short:n #1
+  {
+    \acro_get:n { #1 }
+    \acro_set_plural:n { #1 }
+    \acro_is_used:n { #1 }
+    \acro_is_single:nT { #1 }
+      { \cs_set_eq:NN \acro_hyper_link:nn \use_ii:nn }
+    \acro_write_short:V \l_acro_short_tl
+  }
+
+% get alternative entry:
+\cs_new:Npn \acro_alt:n #1
+  {
+    \acro_get:n { #1 }
+    \acro_set_plural:n { #1 }
+    \acro_is_used:n { #1 }
+    \acro_is_single:nT { #1 }
+      { \cs_set_eq:NN \acro_hyper_link:nn \use_ii:nn }
+    \acro_write_short:V \l_acro_alt_tl
+  }
+
+% get long entry:
+\cs_new:Npn \acro_long:n #1
+  {
+    \acro_get:n { #1 }
+    \acro_set_plural:n { #1 }
+    \acro_is_used:n { #1 }
+    \acro_is_single:nT { #1 }
+      { \cs_set_eq:NN \acro_hyper_link:nn \use_ii:nn }
+    \acro_write:NV \l_acro_long_format_tl \l_acro_long_tl
+  }
+
+% output like the first time:
+\cs_new:Npn \acro_first:n #1
+  {
+    \acro_get:n { #1 }
+    \acro_set_plural:n { #1 }
+    \acro_is_used:n { #1 }
+    \acro_is_single:nT { #1 }
+      { \cs_set_eq:NN \acro_hyper_link:nn \use_ii:nn }
+    \UseInstance { acro-first } { \l_acro_first_instance_tl }
+      { \l_acro_short_tl } { \l_acro_long_tl }
+  }
+
+% set custom format:
+\cs_new:Npn \acro_format:nn #1#2
+  { \prop_put:Nnn \l_acro_format_prop { #1 } { #2 } }
+
+% --------------------------------------------------------------------------
+% experimental sorting feature:
+\AtBeginDocument
+  {
+    \bool_if:NT \l_acro_sort_bool
+      {
+        \RequirePackage { l3sort }
+        \prop_new:N \l_tmpa_prop
+        \seq_new:N  \l_tmpa_seq
+
+        \cs_new:Npn \acro_sort_prop:N #1
+          {
+            \seq_clear:N \l_tmpa_seq
+            \prop_map_inline:Nn #1
+              { \seq_put_right:Nn \l_tmpa_seq { ##1 } }
+            \seq_sort:Nn \l_tmpa_seq
+              {
+                \tl_to_lowercase:n {
+                  \int_compare:nTF { \pdfstrcmp { ##1 } { ##2 } = -1 }
+                    { \sort_ordered: }
+                    { \sort_reversed: }
+                }
+              }
+            \prop_clear:N \l_tmpa_prop
+            \seq_map_inline:Nn \l_tmpa_seq
+              {
+                \prop_get:NnN #1 { ##1 } \l_tmpa_tl
+                \prop_put:NnV \l_tmpa_prop { ##1 } \l_tmpa_tl
+              }
+            \prop_set_eq:NN #1 \l_tmpa_prop
+          }
+      }
+  }
+
+% --------------------------------------------------------------------------
+% print the whole list:
+\cs_new:Npn \acro_print_acronyms:nn #1#2
+  {
+    \iow_now:Nx \@auxout { \string \acro@print@list }
+    \bool_if:NT \l_acro_sort_bool
+      { \acro_sort_prop:N \l_acro_short_prop }
+    \UseInstance { acro-title } { \l_acro_list_title_tl }
+      { \l_acro_list_name_tl }
+    \cs_if_exist:NTF \acro@printed@list
+      {
+        \UseInstance { acro-list } { \l_acro_list_instance_tl }
+          { \l_acro_list_type_tl } { #1 } { #2 }
+      }
+      { \@latex@warning@no@line {Rerun~to~get~acronym~list~right} }
+  }
+
+\cs_new:Npn \acro@print@list
+  { \cs_if_exist:NF \acro@printed@list { \cs_new:Npn \acro@printed@list {} } }
+
+% --------------------------------------------------------------------------
+% USER COMMANDS
+% adding an acronym, user command:
+% #1: use/replace plural (boolean)
+% #2: id
+% #3: short
+% #4: short plural
+% #5: alt
+% #6: long
+% #7: long plural
+% #8: class
+% #9: extra
+\NewDocumentCommand \DeclareAcronym { sm>{\SplitArgument{1}{,}}mo>{\SplitArgument{1}{,}}+mgo }
+  { \acro_new:nnnnnnnnn { #1 } { #2 } #3 { #4 } #5 { #7 } { #6 } }
+\@onlypreamble \DeclareAcronym
+
+\NewDocumentCommand \DeclareAcronymFormat { mm }
+  { \acro_format:nn { #1 } { #2 } }
+\@onlypreamble \DeclareAcronymFormat
+
+% automatic:
+\NewDocumentCommand \ac { m }
+  {
+    \group_begin:
+      \acro_use:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Ac { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_use:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \acp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \acro_use:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Acp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_use:n { #1 }
+    \group_end:
+  }
+
+% short:
+\NewDocumentCommand \acs { m }
+  {
+    \group_begin:
+      \acro_short:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \acsp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \acro_short:n { #1 }
+    \group_end:
+  }
+
+% alt:
+\NewDocumentCommand \aca { m }
+  {
+    \group_begin:
+      \acro_alt:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \acap { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \acro_alt:n { #1 }
+    \group_end:
+  }
+
+% long:
+\NewDocumentCommand \acl { m }
+  {
+    \group_begin:
+      \acro_long:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Acl { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_long:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \aclp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \acro_long:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Aclp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_long:n { #1 }
+    \group_end:
+  }
+
+% first:
+\NewDocumentCommand \acf { m }
+  {
+    \group_begin:
+      \acro_first:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Acf { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_first:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \acfp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \acro_first:n { #1 }
+    \group_end:
+  }
+
+\NewDocumentCommand \Acfp { m }
+  {
+    \group_begin:
+      \bool_set_true:N \l_acro_use_plural_bool
+      \bool_set_true:N \l_acro_first_upper_bool
+      \acro_first:n { #1 }
+    \group_end:
+  }
+
+% reset outputs, they'll behave like the first time again (!not like the _only_
+% time!):
+\NewDocumentCommand \acresetall {}
+  {
+    \prop_map_inline:Nn \l_acro_short_prop
+      { \bool_gset_false:c { g_acro_##1_used_bool } }
+  }
+
+% typeset the list:
+\NewDocumentCommand \printacronyms { G{}o }
+  { \acro_print_acronyms:nn { #1 } { #2 } }
+
+\ProcessKeysOptions { acro }
+
+\AtBeginDocument
+  {
+    \@ifpackageloaded { hyperref }
+      { \bool_set_true:N \l_acro_hyperref_loaded_bool } {}
+  }
+
+\tex_endinput:D
+% --------------------------------------------------------------------------
+% HISTORY:
+2012/06/22 v0.1  - first public release
+2012/06/23 v0.1a - bug fix, added `strict' and `macros' option and creation of
+                   shortcut macros
+                 - added capitalized version of long forms
+                 - added `sort' option
+2012/06/24 v0.1b - added \Acf and \Acfp, added option `plural-ending'
+2012/06/24 v0.1c - added excluded argument to \printacronyms
+2012/06/24 v0.2  - renamed \NewAcronym => \DeclareAcronym
+                   \AcronymFormat => \DeclareAcronymFormat
+2012/06/25 v0.2a - new first-style's: `short' and `reversed'
+2012/06/25 v0.3  - new list formats: extra-tabular, extra-longtable,
+                   extra-tabular-rev, extra-longtable-rev
+                 - extra precaution when using \printacronyms to avoid errors.
+2012/06/27 v0.3a - new option `list-caps', \Acp added
+2012/06/29 v0.3b - extended the `text' template to the `acro-first' object
+                 - added `acro-first' instances `plain' and `plain-reversed'
+2012/07/16 v0.3c - small adjustments to the documentation
+2012/07/23 v0.3d - first CTAN version
+
+% --------------------------------------------------------------------------
+% TODO:
+- Sprach-Support Überschrift der Acronym-Liste
+- Option `totoc'?
\ No newline at end of file