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+% \iffalse meta-comment
+%
+% unitsdef.dtx
+%
+% This file is part of the package unitsdef for use with LaTeX2e
+%
+% Function: Typesetting units in a proper way
+% 
+% Copyright (C) 2004, Patrick Happel
+%
+% This program may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.2
+% 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 1.2 or later is part of all distributions of LaTeX
+% version 1999/12/01 or later.
+%
+% Please send error reports and suggestions for improvements to 
+%    Patrick Happel <patrick.happel@ruhr-uni-bochum.de>
+%
+%
+%<*dtx>
+  \ProvidesFile{unitsdef.dtx}
+%</dtx>
+%<package>\NeedsTeXFormat{LaTeX2e}
+%<package>\ProvidesPackage{unitsdef}[2005/01/04 v0.2 Typesetting units]
+%<driver>\ProvidesFile{unitsdef.dtx}
+% \fi
+          \ProvidesFile{unitsdef.dtx}
+          [2004/01/05 Typesetting units a proper way]
+%
+% \GetFileInfo{unitsdef.sty}
+%
+% \CheckSum{1054}
+%
+%% \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         \~}
+%%
+% \iffalse
+%<*driver>
+\documentclass[a4paper,10pt]{ltxdoc}
+\usepackage{tabularx}
+\usepackage{longtable}
+\usepackage{ltxtable}
+\usepackage{unitsdef}
+\usepackage[latin1]{inputenc}
+\usepackage[english]{babel}
+\usepackage[DIVcalc]{typearea}
+\usepackage{multicol}
+\usepackage{color}
+  \definecolor{dred}{rgb}{.5,0,0}
+  \definecolor{gray}{rgb}{.9,.9,.9}
+\usepackage{url}
+\usepackage{soul}
+\usepackage{booktabs}
+\newcommand{\paket}[1]{\textsf{#1}}
+\newcommand{\option}[1]{\texttt{#1}}
+\newcommand{\name}[1]{\caps{#1}}
+\newcommand{\zitat}[1]{\frqq#1\flqq}
+
+\GlossaryPrologue{\section*{Changes}}
+\makeatletter
+
+\newenvironment{example}{\par\vspace*{.5\baselineskip}}{\par}
+\makeatother
+\RecordChanges
+\EnableCrossrefs         
+\CodelineIndex
+\begin{document}
+   \DocInput{unitsdef.dtx}
+\end{document}
+%</driver>
+% \fi
+% \MakeShortVerb{\§}
+% \title{\paket{unitsdef} -- Typesetting units with \LaTeXe\thanks{Version \fileversion}}
+% \author{\name{Patrick Happel}\thanks{patrick.happel@rub.de}}
+% \date{\filedate}
+% \setcounter{tocdepth}{2}
+% \DoNotIndex{\csname,\endcsname,\expandafter,\noexpand,\string}
+% \DoNotIndex{\begingroup,\endgroup,\def,\xdef,\long,\let}
+% \DoNotIndex{\ifx,\newcommand,\renewcommand}
+% \DoNotIndex{\\,\%,\,\@ifpackageloaded,\@tempa,\AtBeginDocument}
+% \DoNotIndex{\cdot,\DeclareOption,\DeclareRobustCommand,\edef}
+% \DoNotIndex{\else,\ensuremath,\f@family,\fi,\global,\ifmmode}
+% \DoNotIndex{\ifnum,\InputIfFileExists,\mathrm,\MessageBreak,\newif}
+% \DoNotIndex{\PackageError,\PackageInfo,\PackageWarning,\PassOptionsToPackage}
+% \DoNotIndex{\prime,\ProcessOptions,\relax,\RequirePackage,\sfdefault}
+% \DoNotIndex{\text,\unit,\upshape,\xspace}
+% \DoNotIndex{\unit@@literfalse,\unit@@litertrue,\unit@@numprintfalse,\unit@@numprinttrue}
+% \DoNotIndex{\unit@@Ohmfalse,\unit@@Ohmtrue,\unit@@redefgensymbfalse,\unit@@redefgensymbtrue}
+% \DoNotIndex{\unit@@useabbrvtrue,\unit@@useabbrvfalse}
+% \DoNotIndex{\unit@@useampabbrvfalse,\unit@@useampabbrvtrue,\unit@@useampabbrvtrue,\unit@@useampabbrvtrue}
+% \DoNotIndex{\unit@@useconfigfiletrue,\unit@@useconfigfilefalse,\unit@@useenergyabbrvtrue}
+% \DoNotIndex{\unit@@useenergyabbrvfalse,\unit@@usefreqabbrvtrue,\unit@@usefreqabbrvfalse}
+% \DoNotIndex{\unit@@uselengthabbrvtrue,\unit@@uselengthabbrvfalse,\unit@@usemolabbrvfalse}
+% \DoNotIndex{\unit@@usemolabbrvtrue,\unit@@usetimeabbrvtrue,\unit@@usetimeabbrvfalse}
+% \DoNotIndex{\unit@@usevolabbrvtrue,\unit@@usevolabbrvfalse,\unit@@usevoltabbrvtrue,\unit@@usevoltabbrvfalse}
+% \DoNotIndex{\unit@@useweightabbrvtrue,\unit@@useweightabbrvfalse,\unit@@xspacetrue,\unit@@xspacefalse}
+% \changes{v0.1}{2004/02/14}{First public release}
+% \changes{v0.11}{2004/02/17}{Added electronvolt}
+% \changes{v0.12}{2004/02/26}{Fixed some bugs relating to
+%   \paket{gensymb}.}
+% \changes{v0.13}{2004/03/02}{Some bugfixes and some units added.}
+% \changes{v0.13a}{2004/04/27}{More bugfixes. \cmd{\utimes} is now
+%   called \cmd{\unittimes}}
+% \maketitle
+% \begin{abstract}
+% There are a lot of packages for typesetting units in
+% \LaTeXe. Some define macros to typeset a lot of units but do not suit
+% to the actual font settings, some make the characters needed available
+% but do not predefine any unit.\par
+% This package tries to comply with both requirements. It predefines
+% common units, defines an easy to use interface to define new units and
+% changes the output concerning to the surrounding font settings.
+% \end{abstract}
+% \begin{multicols}{2}
+% \tableofcontents
+% \end{multicols}
+% \PrintChanges
+% \vfill
+% \section*{Thanks}
+% \begin{multicols}{2}\small\noindent\raggedright
+% I have to thank some people who helped me by delivering suggestions, bug-reports,
+% feature request, providing general ideas or anything else:
+% \name{Frank Heimann}, \name{Stephan Mann}, \name{Frank Küster}, \name{Stefan
+% Salewski}, \name{Stephan Hennig}, \name{Klaus Wacker}, \name{Christoph Löser}
+% \end{multicols}\newpage
+% \section{Packages loaded by \paket{unitsdef}}
+% \paket{unitsdef} loads (and so needs) the following packages with the given
+% options: 
+% \begin{itemize}
+% \item \paket{[T1]fontenc}
+% \item \paket{textcomp}
+% \item \paket{amsmath}
+% \item \paket{units}
+% \item \paket{xspace} (as long as \option{noxspace}, see
+% section~\ref{sec:more-options}, isn't specified) 
+% \end{itemize}
+% The first two packages are needed for different characters in the
+% encodings set by these packages, \paket{amsmath} provides the very useful
+% |\text| macro and \paket{units} is used for typesetting the
+% units. \paket{xpsace} is included to obtain the facility to write
+% §5\mm and some text§ instead of §5\mm\ and some text§.
+% \section{General usage}\label{generell}
+% To use \paket{unitsdef} simply specify
+% \begin{verse}
+% \cmd{\usepackage}\oarg{options}|{unitsdef}|
+% \end{verse} 
+% in the preamble of your document.
+% \section{Options}\label{sec:options}
+% \subsection{Options related to \paket{gensymb}}\label{sec:gensymb-options}
+% \paket{unitsdef} knows three options to avoid conflicts with the
+% \paket{gensymb}-package that also predefines macros for typesetting
+% »\textmu«, »\textohm« and »\textcelsius«. Some macros are definied both by
+% \paket{gensymb} and \paket{unitsdef}. To solve this problem three different
+% options exist:
+% \begin{description}
+% \item[OHM] makes \paket{unitsdef} use uppercase macros (\cmd{\Ohm},
+%   \cmd{\Celsius}, \cmd{\Micro} and \cmd{\Degree}). The predefined units with
+%   prefixes still appear lowercase (\cmd{\kiloohm}).
+% \item[ohm] is the opposite to \option{OHM} and is the default setting.
+% \item[redef-gensymb] This option copies \cmd{\ohm}, \cmd {\celsius},
+%   \cmd{\micro} and \cmd{\degree} from \paket{gensymb} to \cmd{\gensymbohm},
+%   \cmd{\gensymbcelsius}, \cmd{\gensymbmicro} and \cmd{\gensymbdegree}.
+%   \paket{unitsdef} then redefines this four commands so that they
+%   have the same meaning as without \paket{gensymb}. \textbf{Important:} To
+%   use this option \paket{gensymb} has to be loaded \emph{before}
+%   \paket{unitsdef}!
+% \end{description}
+% \subsection{More options}\label{sec:more-options}
+% \paket{unitsdef} knows some other options to change its behaviour:
+% \begin{description}
+% \item[LITER] Makes \paket{unitsdef} use the \emph{uppercase} L as the sign produced
+% by \cmd{\liter}. This is default behaviour.
+% \item[liter] Makes \paket{unitsdef} use the \emph{lowercase} l as the sign produced
+% by \cmd{\liter}.
+% \item[noxspace] Maybe some problems occur due to the \paket{xspace}
+% functionality of \paket{unitsdef}. This option forces \paket{unitsdef} to do
+% without \paket{xspace}.
+% \item[noconfig] Tells \paket{unitsdef} not to look for a local
+% \paket{unitsdef} configuration file §unitsdef.cfg§ (see
+% section~\ref{config-file} for details).
+% \item[noabbrv] Is an abbreviation for \emph{no abbreviations}. \paket{unitsdef}
+% does not define any short commands for a unit. This might be helpfull if
+% another package defines a command with the same name and \LaTeX\ exits with
+% an error.
+% \item[ugly] Applies the option \option{ugly} to \paket{units}, thus all
+% units containing fraction will be typeset like m/s in text mode and
+% $\frac{\mathrm{m}}{\mathrm{s}}$ in mathmode.
+% \item[\emph{skipping only particular abbreviations}] Usually only
+% one macro causes conflict between a definition made by
+% \paket{unitsdef} and another package. There are some options to
+% avoid loading only particular abbreviations to avoid the definition
+% that causes the conflict:
+% \begin{description}
+% \item[noamperageabbr] Avoids defining the abbreviations for units of
+% amperage (\cmd{\pA}, \cmd{\nA}, \cmd{\micA}, \cmd{\mA}, \cmd{\kA}).
+% \item[nofrequncyabbr] Avoids defining \cmd{\kHz}, \cmd{\MHz} and
+% \cmd{\GHz}.
+% \item[nomolabbr] Avoids defining \cmd{\fmol}, \cmd{\pmol},
+% \cmd{\nmol}, \cmd{\micmol} and \cmd{\mmol}.
+% \item[novoltageabbr] Avoids defining \cmd{\kV} and \cmd{\mv}.
+% \item[novolumeabbr] Avoids defining \cmd{\fl}, \cmd{\pl}, \cmd{\nl},
+% \cmd{\micl}, \cmd{\ml}, \cmd{\cl} and \cmd{\dl}.
+% \item[noweightabbr] Avoids defining \cmd{\kg}, \cmd{\fg}, \cmd{\pg},
+% \cmd{\nanog}, \cmd{\micg} and \cmd{\mg}.
+% \item[noenergyabbr] Avoids defining \cmd{\kJ}, \cmd{\eV},
+% \cmd{\meV}, \cmd{\keV}, \cmd{\MeV}, \cmd{\GeV} and \cmd{\TeV}.
+% \item[nolengthabbr] Avoids defining \cmd{\picom}, \cmd{\nm},
+% \cmd{\micm}, \cmd{\mm}, \cmd{\cm}, \cmd{\dm} and \cmd{\km}.
+% \item[notimeabbr] Avoids defining \cmd{\sek}, \cmd{\fs}, \cmd{\ps},
+% \cmd{\ns}, \cmd{\mics} and \cmd{\ms}.
+% \end{description}
+% \end{description}
+% \section{Typesetting units}\label{setzen}
+% \paket{unitsdef} includes a large set of predefined units. They are listed
+% in section~\ref{definierte}. These units, as well as units defined by 
+% you with \cmd{\newunit} (see below), can be used as follows:
+% \begin{verse}
+% |\|\meta{unitmacro}$\left[\left<\text{value}\right>\right]$
+% \end{verse}
+% As you see, the value is an optional argument. Thus you can write |5\kg|
+% (instead of |\kg[5]|), this may simplify the writing process. The distance
+% in both cases is |\unitvaluesep|.\par
+% If the optional argument is not used you still can write 
+% |5\kg and some text|
+%  due to the \paket{xspace} functionality of \paket{unitsdef}.\par
+% \DescribeMacro{\unitvaluesep} If you want another distance between value and
+% unit you simply have to redefine |\unitvaluesep|:
+% \begin{verse}
+% |\renewcommand{\unitvaluesep}{\hspace*{|$\left<\text{\textit{distance}}\right>$|}}|
+% \end{verse}
+% \DescribeMacro{\unitsignonly} If you want to typeset the sign of a unit
+% without any value (for introducing a new unit-sign f.e.) |\unitvaluesep|
+% must not be set. This is provided by the macro
+% |\unitsignonly{\<unitmacro>}|.\par
+% \textbf{Important!} If you want to specify a unit with a prefix, never use
+% something like |\milli\hour|. This will lead to problems. Always define the
+% units first using \cmd{\newunit} or use the command \cmd{\ilu} to
+% typeset an unit without defining it first!
+% \subsection{Inline units}\label{sec:inlineunits}
+% \DescribeMacro{\ilu}
+% Some packages for typesetting units provide the possibility to write
+% things like |\micro\meter| to obtain \unitsignonly{\micrometer}. With
+% \paket{unitsdef} this will cause some problems due to the toggling of
+% some internal switches. If you want to use prefices without defining
+% a new unit you have to use the command \cmd{\ilu}. It has one
+% optional and one mandatory argument. The first contains the value to
+% be typeset, the latter contains the unit:
+% \begin{example}
+% \noindent\begin{minipage}{\textwidth}
+%   \begin{minipage}{.45\linewidth}
+%     \begin{verbatim}
+% A force of 
+% \ilu[17]{\micro\newton} 
+% is applied. 
+% $F=17\ilu{\micro\newton}$
+% \textsf{17\ilu{\micro\newton}}
+%     \end{verbatim}
+%   \end{minipage}\hfill
+%   \colorbox{gray}{%
+%   \begin{minipage}{.45\linewidth}  
+% A force of \ilu[17]{\micro\newton} is
+% applied. $F=17\ilu{\micro\newton}$% \textsf{17\ilu{\micro\newton}}
+%   \end{minipage}}
+% \end{minipage}
+% \end{example}
+% \subsection{Typesetting angles and arcs}\label{angles}
+% If you type |5\degree10\arcmin12\arcsec| you will get the following result:
+% \zitat{5\degree10\arcmin12\arcsec}. There are full spaces between the single
+% values and the preceding unit-symbol. This is due to the \paket{xspace} 
+% functionality of \paket{unitsdef}. The correct output you will obtain by using
+% the macro \cmd{\arc}\footnote{It is expected to have (nearly?) the same
+% usage and results as \cmd{\ang} from the \paket{SIstyle} package.}. Using 
+% it in this way |\arc{5;10;12}| will lead to  \zitat{\arc{5;10;12}}. There
+% are some more features of this macro, best understood if you look at this
+% example:
+% \begin{example}
+% \begin{minipage}{.45\textwidth}
+% \begin{verbatim}
+%  \begin{enumerate}
+%    \item \arc{1}      % 1
+%    \item \arc{1;2}    % 2
+%    \item \arc{1;2;3}  % 3
+%    \item \arc{;2;3}   % 4
+%    \item \arc{;;3}    % 5
+%    \item \arc{1;;2}   % 6
+%    \item \arc{1;;}    % 7 
+%    \item \arc{;;;}    % 8
+%  \end{enumerate}
+% \end{verbatim}
+% \end{minipage}\hfill\colorbox{gray}{%
+% \begin{minipage}{.45\textwidth}\small
+%  \begin{enumerate}
+%  \item \arc{1}
+%  \item \arc{1;2}
+%  \item \arc{1;2;3}
+%  \item \arc{;2;3}
+%  \item \arc{;;3}
+%  \item \arc{1;;2}
+%  \item \arc{1;;}
+%  \item \arc{;;;}
+%  \end{enumerate}
+% \end{minipage}}
+% \end{example}
+% \subsection{Logical markup for units}\label{sec:logicalmarkup}
+% One advantage of \paket{unitsdef} is that it typesets the units
+% suiting to the surrounding font settings. But some people
+% (magazines, universities, \ldots) want units always to be typeset in
+% a special way. There is a checklist available at
+% \url{http://physics.nist.gov/cuu/Units/checklist.html}. 
+% \paket{unitsdef} does not fit to all these requirements by
+% default. But there are some macros for figuring out the
+% output. \DescribeMacro{\SI}First, there is the command \cmd{\SI} which typesets (by
+% default) all units in upright shape, but doesn't change anything
+% else according to the font settings. The command \cmd{\SI} has two
+% mandatory arguments, the first has to contain the value, the latter
+% contains the unit:
+% \begin{example}
+% \begin{minipage}{.45\textwidth}
+%   \begin{verbatim}
+%  \textbf{\textit{A force of  
+%   \SI{17}{\newton} 
+%   was applied.}} 
+%   \end{verbatim}
+% \end{minipage}\hfill\colorbox{gray}{%
+% \begin{minipage}{.45\textwidth}
+% \textbf{\textit{A force of \SI{17}{\newton} was applied.}}
+% \end{minipage}}
+% \end{example} 
+% If you want to customize the output of \cmd{\SI}, you can redefine
+% the macro \cmd{\unitSIdef}. By default it contains \cmd{\upright},
+% but if you want units to be typeset upright in serif family, you can
+% achieve this by redefining it to |\upshape\rmfamily|:
+% \begin{example}
+% \begin{minipage}{.45\textwidth}
+%   \begin{verbatim}
+%  \renewcommand{\unitSIdef}
+%    {\upshape\rmfamily}
+%  \textsf{\textbf{\textit{%
+%   A force of  
+%   \SI{17}{\newton} 
+%   was applied.}}}
+%   \end{verbatim}
+% \end{minipage}\hfill\colorbox{gray}{%
+% \begingroup
+% \begin{minipage}{.45\textwidth}
+%  \renewcommand{\unitSIdef}{\upshape\rmfamily}
+%  \textsf{\textbf{\textit{%
+%   A force of  
+%   \SI{17}{\newton} 
+%   was applied.}}}
+% \end{minipage}\endgroup}
+% \end{example} 
+% \section{The interface}\label{schnittstelle}
+% \subsection{Defining new units}
+% \DescribeMacro{\newunit}
+% Besides the predefined unit-macros (see section~\ref{definierte})
+% \paket{unitsdef} offers the possibility to define new
+% units. This is done with the macro \cmd{\newunit}:
+% \begin{verse}
+% \cmd{\newunit}\{|\|\meta{unitmacro}\}\marg{unitsign}
+% \end{verse}
+% To typeset a unit \emph{Newton} (represented by |N|) you have to
+% define\footnote{You do not really have to define \emph{newton}, it is
+% already defined by \paket{unitsdef}. This is just an example.} it
+% as follows:
+% \begin{verbatim}
+%     \newunit{\newton}{N}
+% \end{verbatim}
+% After this you can use the macro \cmd{\newton}:
+% \begin{verbatim}
+%     5\newton plus \newton[3] is 8\newton.
+% \end{verbatim}
+% This will give the following output:
+% \begin{verse}
+% 5\newton plus \newton[3] is 8\newton.
+% \end{verse}
+% To define a unit \emph{millinewton} (|mN|) simply define:
+% \begin{verbatim}
+%     \newunit{\millinewton}{\milli\newton}
+% \end{verbatim}
+% \DescribeMacro{\renewunit} For redefining units, the macro
+% \cmd{\renewunit} can be used with the same syntax as \cmd{\newunit} 
+% (on the lines of \cmd{\newcommand} and \cmd{\renewcommand}).\par
+% \DescribeMacro{\newnosepunit} As an additional facility to define new units
+% the macro \cmd{\newnosepunit} exists with the same syntax as \cmd{\newunit}.
+% It allows you to define a unit without  any space between the value and the
+% unit-symbol. The only unit I know typeset without leading space is
+% \emph{degree}. You typeset 5\degree instead of 5\,\degree. But maybe there
+% are other units that must not have leading space, so I included this command
+% in the user interface. 
+%
+% \DescribeMacro{\renewnosepunit} If you want to redifine a unit to be typeset 
+% without leading space, use \cmd{\renewnosepunit}.\par
+% \DescribeMacro{\per} To typeset units containing a fraction the macro
+% \cmd{\per} is defined. The usage is:
+% \begin{verse}
+% \cmd{\per}\marg{numerator}\marg{denominator}
+% \end{verse}
+% To define \emph{newton per squaremeter} you have to say:
+% \begin{verbatim}
+%     \newunit{\newtonpersmeter}{\per{\newton}{\squaremeter}}
+% \end{verbatim}\par
+% \DescribeMacro{\unittimes} To typeset a multiplication sign between two
+% units the macro \cmd{\unittimes}  is used:
+% \begin{verbatim}
+%     \newunit{\newtonmeter}{\newton\unittimes\meter}
+%     \newunit{\newtonmeterpersec}{\per{\newton\unittimes\meter}{\second}}
+% \end{verbatim}\par
+% \DescribeMacro{\unitsep} To typeset additional space (instead of \cmd{\unittimes}) between two units
+% you can use \cmd{\unitsep} (do NOT use \cmd{\,}):
+% \begin{verbatim}
+%     \newunit{\newtonmeter}{\newton\unitsep\meter}
+% \end{verbatim}
+% The default is \cmd{\,} but if you want different amount of space you can
+% simply |\renewcommand{\unitsep}|\marg{distance}.\par
+% \DescribeMacro{\unitsuperscript} To typeset superscripts use \cmd{\unitsuperscript}:
+% \begin{verbatim}
+%     \newunit{\squaremeter}{\meter\unitsuperscript{2}}
+% \end{verbatim}
+% \subsection{Typesetting \textmu, \textohm, \textdegree\ and  
+% \textcelsius}\label{diesache} 
+% \DescribeMacro{\setTextOmega}\DescribeMacro{\setMathOmega}
+% \DescribeMacro{\setTextmu}\DescribeMacro{\setMathmu}
+% \DescribeMacro{\setTextCelsius}\DescribeMacro{\setMathCelsius}
+% \DescribeMacro{\setMathDegree}\DescribeMacro{\setTextDegree}  
+% Typesetting units would be quite easy without \emph{Ohm} and \emph{micro}
+% (\emph{degree} and \emph{degree Celsius} as well). The representing
+% characters \textmu\ and  \textohm\ have to exist in three variants: One for
+% use in math-mode 
+% (suiting to \cmd{\mathrm}) the latter two for use in \cmd{\rmfamily} and
+% \cmd{\sffamily}. Most fonts have a suiting \textmu\ but very few fonts own a
+% \textohm. The fonts from \name{Bitstream} (delivered with some versions of
+% \name{Corel Draw}) have an italic non-suiting \textmu, so you have to take care
+% of a \textmu\ when using such fonts, too. Also the \textmu\ in Latin Modern
+% fonts isn't very good looking yet (but LM is still in
+% beta-state). Because of nearly infinite combinations of different
+% fonts it is impossible to choose the correct characters for \textmu,
+% \textohm\ and \textcelsius\ automatically. To define these characters
+% use the macros \cmd{\setTextOmega}, \cmd{\setMathOmega}, \cmd{\setTextmu},
+% \cmd{\setMathmu}, \cmd{\setTextCelsius}, \cmd{\setMathCelsius},
+% \cmd{\setMathDegree} and \cmd{\setTextDegree}:
+% \begin{verse}
+% \cmd{\setTextOmega}\marg{serif-definition}\marg{sans-serif-definition}\\
+% \cmd{\setMathOmega}\marg{definition}\\[.5\baselineskip]
+% \cmd{\setTextmu}\marg{serif-definition}\marg{sans-serif-definition}\\
+% \cmd{\setMathmu}\marg{definition}\\[.5\baselineskip]
+% \cmd{\setTextCelsius}\marg{serif-definition}\marg{sans-serif-definition}\\
+% \cmd{\setMathCelsius}\marg{definition}\\[.5\baselineskip]
+% \cmd{\setTextDegree}\marg{serif-definition}\marg{sans-serif-definition}\\
+% \cmd{\setMathDegree}\marg{definition}
+% \end{verse}
+% \textbf{Important!}  The macros concerning typesetting in math-mode use
+% \paket{amsamth}'s \cmd{\text}-macro. So you have to switch to math-mode to use a
+% character out of the math alphabet. The reason for this is
+% \paket{units}. \paket{units} uses \cmd{\mathrm} to typeset in math-mode. But only few
+% mathfonts have a suitable \textohm, for example:
+% \begin{verbatim}
+%     \documentclass{article}
+%
+%     \usepackage[T1]{fontenc}
+%     \usepackage{textcomp}
+%     \usepackage{mathpazo}
+%
+%     \begin{document}
+%       $\Omega\qquad\mathrm{\Omega}$
+%     \end{document}
+% \end{verbatim}
+% \paket{unitsdef} sets the defaults in a way suitable to the CM-family:
+% \begin{verbatim}
+%     \setMathOmega{$\mathrm{\Omega}$}
+%     \setMathmu{\textmu}
+%     \setTextOmega{\textohm}{\textohm}
+%     \setTextmu{\textmu}{\textmu}
+%     \setMathCelsius{\textcelsius}
+%     \setTextCelsius{\textcelsius}{\textcelsius}
+%     \setMathDegree{\textdegree}
+%     \setTextDegree{\textdegree}{\textdegree}
+% \end{verbatim}
+% To find a suitable \textohm\ for different fonts use \name{Walter Schmidt}'s
+% \paket{gensymb}-package\footnote{\texttt{CTAN:macros/latex/contrib/was/}}
+% and read the documentation of this package.
+% \section{Local configuration file}\label{config-file}
+% Since version~0.2 unitsdef by default looks for a file §unitsdef.cfg§ and
+% inputs its contents. This is useful if you frequently use a similar set of
+% units in your documents. You put your definitions in §unitsdef.cfg§ and they
+% are included automaticly in your document\footnote{Keep in mind that \TeX\
+% has to find the file, so follow the instructions given by your
+% \TeX-distribution. On §*nix§-like systems and a TDS compliant distribution it might
+% be possible to put |unitsdef.cfg| in \texttt{\textasciitilde}|/texmf/tex/latex/unitsdef/config/|
+% and update the filename database.}
+%
+% A configuration file may look like this: 
+% \begin{verbatim}
+% \ProvidesFile{unitsdef.cfg}%
+%    [2004/12/09 v1.0 some definitions for unitsdef]
+% 
+% \newunit{\molar}{\per{\mole}{\liter}}
+% \newunit{\millimolar}{\per{\millimole}{\liter}}
+%
+% \endinput
+% \end{verbatim}
+% If, by some reason, you don't want your local config file to be loaded
+% specify the option \option{noconfig} in the \cmd{\usepackage} command.
+% \section{Predefined units and prefices}\label{definierte}
+% \LTXtable{\textwidth}{defedpraef.tex}
+% \LTXtable{\textwidth}{defedunits.tex}
+% \section{To Do}\label{sec:todo}
+% There are a lot of things to be done. Some are mentioned here: 
+% \begin{itemize}
+% \item Add some more macros to figure out the ouptut (something
+% similar to \cmd{\SI}). Provide the possibility to typeset all units
+% in math mode.
+% \item Improve the documentation.
+% \item Adding interfaces units for \AA, \textperthousand\ and \unitsignonly{\degree}F
+% \end{itemize}
+% \StopEventually{}   
+% \section{Code}\label{code}
+%    \begin{macrocode}
+%<*package>
+%    \end{macrocode}
+% \subsection{switches}
+%    \begin{macro}{\if@@setunitsep}
+% This switch is used internally to decide, whether a distance is to be
+% typesetted or not.
+%    \begin{macrocode}
+\newif\if@@setunitsep
+\@@setunitseptrue
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ifunit@@Ohm}
+% This switch decides whether \cmd{\ohm} or \cmd{\Ohm} and 
+% \cmd{\celsius} or \cmd{\Celsius} is defined (according to \paket{gensymb}).
+%    \begin{macrocode}
+\newif\ifunit@@Ohm%
+\unit@@Ohmfalse
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ifunit@@redefgensymb}
+% This switch makes \paket{gensymb}'s macros \cmd{\ohm} and \cmd{\celsius}
+% available as \cmd{\gensymbohm} and \cmd{\gensymbcelsius}. \paket{unitsdef}
+% uses \cmd{\ohm} and \cmd{\celsius}.
+%    \begin{macrocode}
+\newif\ifunit@@redefgensymb
+\unit@@redefgensymbfalse
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ifunit@@liter}
+% This switch decides whether the output of the unit \cmd{liter} is typeset as
+% |l| or |L|
+%    \begin{macrocode}
+\newif\ifunit@@liter
+\unit@@literfalse
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ifunit@@xspace}
+% This switch decides whether \paket{xspace} is used.
+%    \begin{macrocode}
+\newif\ifunit@@xspace
+\unit@@xspacetrue
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ifunit@@xspace}
+% This switch decides whether abbreviattions are loaded.
+%    \begin{macrocode}
+\newif\ifunit@@useabbrv
+\unit@@useabbrvtrue
+%    \end{macrocode}
+%    \end{macro}
+% The follwing switches decide whether to load a |.cfg| file containing some
+% abbreviations or not. 
+%    \begin{macrocode}
+\newif\ifunit@@useampabbrv
+\unit@@useampabbrvtrue
+\newif\ifunit@@usefreqabbrv
+\unit@@usefreqabbrvtrue
+\newif\ifunit@@usemolabbrv
+\unit@@usemolabbrvtrue
+\newif\ifunit@@usevoltabbrv
+\unit@@usevoltabbrvtrue
+\newif\ifunit@@usevolabbrv
+\unit@@usevolabbrvtrue
+\newif\ifunit@@useweightabbrv
+\unit@@useweightabbrvtrue
+\newif\ifunit@@useenergyabbrv
+\unit@@useenergyabbrvtrue
+\newif\ifunit@@uselengthabbrv
+\unit@@uselengthabbrvtrue
+\newif\ifunit@@usetimeabbrv
+\unit@@usetimeabbrvtrue
+%    \end{macrocode}
+%    \begin{macro}{\ifunit@@useconfigfile}
+% This switch stores whether the option \option{noconfig} is given.
+%    \begin{macrocode}
+\newif\ifunit@@useconfigfile
+\unit@@useconfigfiletrue
+%    \end{macrocode}
+%    \end{macro}
+% \subsection{Options}
+%    \begin{macrocode}
+\DeclareOption{OHM}{\unit@@Ohmtrue}
+\DeclareOption{ohm}{\unit@@Ohmfalse}
+\DeclareOption{redef-gensymb}{%
+  \@ifpackageloaded{gensymb}{%
+    \unit@@redefgensymbtrue%
+    \AtBeginDocument{%
+      \let\gensymbohm\ohm%
+      \let\gensymbcelsius\celsius%
+      \let\gensymbmicro\micro%
+      \renewunit{\ohm}{\unitOmega}%
+      \renewunit{\celsius}{\unitCelsius}%
+      \renewcommand{\micro}{\unitmu\@@setunitsepfalse}%
+    }
+  }{%
+    \PackageError{unitsdef}{
+      You requestet me to save some macros from the\MessageBreak 
+      gensymb-package. This package is  not loaded.\MessageBreak
+      If you load it later, tell me to use  uppercase\MessageBreak
+      macronames where conflicts appear by giving me\MessageBreak
+      the option OHM.
+    }
+  }
+}
+\DeclareOption{liter}{\unit@@litertrue}
+\DeclareOption{LITER}{\unit@@literfalse}
+\DeclareOption{noxspace}{\unit@@xspacefalse}
+\DeclareOption{noabbrv}{\unit@@useabbrvfalse}
+\DeclareOption{ugly}{\PassOptionsToPackage{ugly}{units}}
+\DeclareOption{noamperageabbr}{\unit@@useampabbrvfalse}
+\DeclareOption{nofrequncyabbr}{\unit@@usefreqabbrvfalse}
+\DeclareOption{nomolabbr}{\unit@@usemolabbrvfalse}
+\DeclareOption{novoltageabbr}{\unit@@usevoltabbrvfalse}
+\DeclareOption{novolumeabbr}{\unit@@usevolabbrvfalse}
+\DeclareOption{noweightabbr}{\unit@@useweightabbrvfalse}
+\DeclareOption{noenergyabbr}{\unit@@useenergyabbrvfalse}
+\DeclareOption{nolengthabbr}{\unit@@uselengthabbrvfalse}
+\DeclareOption{notimeabbr}{\unit@@usetimeabbrvfalse}
+\DeclareOption{noconfig}{\unit@@useconfigfilefalse}
+\ProcessOptions
+%    \end{macrocode}
+% \subsection{Loading packages}
+%    \begin{macrocode}
+\RequirePackage[T1]{fontenc}
+\RequirePackage{amsmath}
+\RequirePackage{textcomp}
+\RequirePackage{units}
+\ifunit@@xspace
+  \RequirePackage{xspace}%
+  \let\unit@@xspace\xspace%
+\else
+  \let\unit@@xspace\relax
+\fi
+%    \end{macrocode}
+% \subsection{The interface}
+%    \begin{macro}{\unitsignonly}
+% This macro is used to typeset a unit without leading spacing. To
+% achieve this \cmd{\@@setunitsep} is set to
+% §false§. \cmd{\unitsignonly} has an mandatory argument containig the
+% unit to typeset: \cmd{\unitsignonly}\marg{unit}.
+% \changes{v0.2}{2004/11/28}{Now defined by \cmd{\DeclareRobustCommand}}
+%    \begin{macrocode}
+\DeclareRobustCommand{\unitsignonly}[1]{%
+  \@@setunitsepfalse%
+  \begingroup%
+  \let\unit@@xspace\relax%
+  #1%
+  \endgroup}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitvaluesep}
+% This Macro specifies the distance between value and unit, default value is
+% \cmd{\,}. 
+%    \begin{macrocode}
+\newcommand{\unitvaluesep}{}
+\let\unitvaluesep\,%
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\newunit}
+% \changes{v0.2}{2004/11/23}{Added code for the use of \paket{xspace}}
+% This macro is the interface to define new units. Usage is:
+% \begin{verse}
+% \cmd{\newunit}\{\textbackslash\meta{unitmacro}\}\marg{unitsign}. 
+% \end{verse}
+%    \begin{macrocode} 
+\newcommand{\newunit}[2]{%
+%    \end{macrocode}
+% \changes{v0.2}{2004/11/28}{\cmd{\newunit} now uses \cmd{\DeclareRobustCommand}
+% instead of \cmd{\newcommand}}
+% First there is a check whether the macro already exists:
+%    \begin{macrocode}
+    \newcommand{#1}{}%
+%    \end{macrocode}    
+% then its definition is performed.
+%    \begin{macrocode}
+    \DeclareRobustCommand{#1}[1][]{##1%
+%    \end{macrocode}
+% The redefinition of \cmd{\unitvaluesep} has to stay local:
+%    \begin{macrocode}
+      \begingroup%
+%    \end{macrocode}
+% \cmd{\xpsace} must not do anything when invoked inside a unit. So it is set to
+% \cmd{\relax} inside this group. 
+%    \begin{macrocode}
+       \let\unit@@xspace\relax%
+       \if@@setunitsep%
+%    \end{macrocode}
+% \changes{v0.2}{2004/11/28}{Now \paket{unitsdef} uses \cmd{\unitvaluesep}
+% inistead of \cmd{\,}, thereby the interface is more flexible and allows the
+% users to commit changes.}
+%    \begin{macrocode}
+         \unitvaluesep%
+%    \end{macrocode}
+% Once a spacing is typeset there must no further spacing be
+% typeset. To avoid typesetting more spacings I redefine \cmd{\unitvaluesep}
+% to \cmd{\relax}.
+%    \begin{macrocode}
+         \let\unitvaluesep\relax%
+       \fi%
+       \unit{#2}\global\@@setunitseptrue%
+      \endgroup%
+%    \end{macrocode}
+% Now \cmd{\xspace} has to be invoked, as long as \option{noxspace} is not set.
+%    \begin{macrocode}
+      \unit@@xspace%
+    }%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\renewunit}
+% \changes{v0.2}{2004/11/23}{Added code for the use of
+% \paket{xspace}. \cmd{\DeclareRobustCommand} is used instead of
+% \cmd{\renewcommand}.}
+% This macro is to redifine existing units.
+%    \begin{macrocode} 
+\newcommand{\renewunit}[2]{%
+    \renewcommand{#1}{}%
+    \DeclareRobustCommand{#1}[1][]{##1%
+      \begingroup%
+       \let\unit@@xspace\relax%
+       \if@@setunitsep%
+         \unitvaluesep%
+         \let\,\relax%
+       \fi%
+       \unit{#2}\global\@@setunitseptrue%
+      \endgroup%
+      \unit@@xspace%
+    }%
+}
+
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\newnosepunit}
+% \changes{v0.2}{2004/11/26}{Added \cmd{\newnosepunit} and \cmd{\renewnosepunit}
+% for units without any space between value and unitsign}
+%    \begin{macrocode}
+\newcommand{\newnosepunit}[2]{%
+    \newcommand{#1}{}%
+    \DeclareRobustCommand{#1}[1][]{##1%
+      \begingroup%
+       \let\xspace\relax%
+       \if@@setunitsep%
+         \let\,\relax%
+       \fi%
+       \unit{#2}\global\@@setunitseptrue%
+      \endgroup%
+      \unit@@xspace%
+    }%
+}
+\newcommand{\renewnosepunit}[2]{%
+    \renewcommand{#1}{}%
+    \DeclareRobustCommand{#1}[1][]{##1%
+      \begingroup%
+       \let\unit@@xspace\relax%
+       \if@@setunitsep%
+         \let\,\relax%
+       \fi%
+       \unit{#2}\global\@@setunitseptrue%
+      \endgroup%
+      \unit@@xspace%
+    }%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\per}
+%    \begin{macrocode}
+\newcommand\per[2]{%
+  \@@setunitsepfalse%
+  \unitfrac{#1}{#2}%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\ilu}
+% The command \cmd{\ilu} provides the possibility to typeset
+% inline-units that are not defined by a previous \cmd{\newunit}
+% command. 
+%    \begin{macrocode}
+\newcommand{\ilu}[2][]{%
+  \begingroup%
+    \@@setunitsepfalse%
+    \let\unit@@xspace\relax%
+    #1\,\unit{#2}%
+  \endgroup%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unittimes}
+%    \begin{macrocode} 
+\newcommand{\unittimes}{\@@setunitsepfalse\ensuremath{\cdot}}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitsep}
+%    \begin{macrocode} 
+\let\unitsep\,
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitsuperscript}
+%    \begin{macrocode}
+\newcommand{\unitsuperscript}[1]{%
+  \ifmmode^{#1}\else\textsuperscript{#1}\fi%
+} 
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitMathOmega}
+%    \begin{macrocode} 
+\newcommand{\unitMathOmega}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitTextOmega}
+%    \begin{macrocode} 
+\newcommand{\unitTextOmega}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unittextmu}
+%    \begin{macrocode} 
+\newcommand{\unitTextmu}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitmathmu}
+%    \begin{macrocode} 
+\newcommand{\unitMathmu}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitMathCelsius}
+%    \begin{macrocode}
+\newcommand{\unitMathCelsius}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitTextCelsius}
+%    \begin{macrocode}
+\newcommand{\unitTextCelsius}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitTextDegree}
+%    \begin{macrocode}
+\newcommand{\unitTextDegree}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitMathDegree}
+%    \begin{macrocode}
+\newcommand{\unitMathDegree}{}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitCelsius}
+%    \begin{macrocode} 
+\newcommand{\unitCelsius}{%
+  \ifmmode\unitMathCelsius\else\unitTextCelsius\fi%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitmu}
+%    \begin{macrocode} 
+\newcommand{\unitmu}{%
+  \ifmmode\unitMathmu\else\unitTextmu\fi%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitOmega}
+%    \begin{macrocode} 
+\newcommand{\unitOmega}{%
+  \ifmmode\unitMathOmega\else\unitTextOmega\fi%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitDegree}
+%    \begin{macrocode} 
+\newcommand{\unitDegree}{%
+  \ifmmode\unitMathDegree\else\unitTextDegree\fi%
+}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setMathOmega}
+%    \begin{macrocode} 
+\newcommand{\setMathOmega}[1]{%
+  \renewcommand{\unitMathOmega}{\text{#1}}%
+}
+\setMathOmega{$\mathrm{\Omega}$}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setMathmu}
+%    \begin{macrocode} 
+\newcommand{\setMathmu}[1]{%
+  \renewcommand{\unitMathmu}{\text{#1}}%
+}
+\setMathmu{\textmu}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setMathCelsius}
+%    \begin{macrocode} 
+\newcommand{\setMathCelsius}[1]{%
+  \renewcommand{\unitMathCelsius}{\text{#1}}%
+}
+\setMathCelsius{\textcelsius}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setMathDegree}
+%    \begin{macrocode} 
+\newcommand{\setMathDegree}[1]{%
+  \renewcommand{\unitMathDegree}{\text{#1}}%
+}
+\setMathDegree{\textdegree}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setTextOmega}
+% This macro is to define the \zitat{\textohm} that is used in text
+% mode. The first argument is used when \cmd{\rmfamily} is active, the
+% latter when \cmd{\sffamily} is active.
+%    \begin{macrocode}
+\newcommand{\setTextOmega}[2]{%
+  \renewcommand{\unitTextOmega}{%
+    \begingroup%
+      \edef\@tempa{\sfdefault}%
+      \ifx\f@family\@tempa%
+        #2%
+      \else%
+        #1%
+      \fi%
+    \endgroup%
+  }%
+}
+\setTextOmega{\textohm}{\textohm}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setTextmu}
+% This macro is to define the \zitat{\textmu} that is used in text
+% mode. The first argument is used when \cmd{\rmfamily} is active, the
+% latter when \cmd{\sffamily} is active.
+%    \begin{macrocode}
+\newcommand{\setTextmu}[2]{%
+  \renewcommand{\unitTextmu}{%
+    \begingroup%
+      \edef\@tempa{\sfdefault}%
+      \ifx\f@family\@tempa%
+        #2%
+      \else%
+        #1%
+      \fi%
+    \endgroup%
+  }%
+}
+\setTextmu{\textmu}{\textmu}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setTextCelsius}
+% This macro is to define the \zitat{\textcelsius} that is used in text
+% mode. The first argument is used when \cmd{\rmfamily} is active, the
+% latter when \cmd{\sffamily} is active.
+%    \begin{macrocode}
+\newcommand{\setTextCelsius}[2]{%
+  \renewcommand{\unitTextCelsius}{%
+    \begingroup%
+      \edef\@tempa{\sfdefault}%
+      \ifx\f@family\@tempa%
+        #2%
+      \else%
+        #1%
+      \fi%
+    \endgroup%
+  }%
+}
+\setTextCelsius{\textcelsius}{\textcelsius}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\setTextDegree}
+% This macro is to define the \zitat{\textdegree} that is used in text
+% mode. The first argument is used when \cmd{\rmfamily} is active, the
+% latter when \cmd{\sffamily} is active.
+%    \begin{macrocode}
+\newcommand{\setTextDegree}[2]{%
+  \renewcommand{\unitTextDegree}{%
+    \begingroup%
+      \edef\@tempa{\sfdefault}%
+      \ifx\f@family\@tempa%
+        #2%
+      \else%
+        #1%
+      \fi%
+    \endgroup%
+  }%
+}
+\setTextDegree{\textdegree}{\textdegree}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\unitSIdef}
+% \changes{v0.2}{2004/12/22}{Added \cmd{\unitSIdef} to define units
+% typeset by \cmd{\SI}.}
+%    \begin{macrocode}
+\newcommand\unitSIdef{\upshape}
+%    \end{macrocode}
+%    \end{macro}
+%    \begin{macro}{\SI}
+% \changes{v0.2}{2004/12/22}{Added \cmd{\SI} to typeset units and
+% values obeying the SI-rules.}
+%    \begin{macrocode}
+\newcommand{\SI}{}
+\DeclareRobustCommand{\SI}[2]{%
+  \begingroup%
+    \let\unit@@xspace\relax%
+    \unitSIdef\selectfont%
+      #1#2%
+  \endgroup%
+}
+%    \end{macrocode}
+%    \end{macro}
+% \subsection{Definition of prefices}
+%    \begin{macrocode}
+\newcommand{\yocto}{y\@@setunitsepfalse}            % -24
+\newcommand{\zepto}{z\@@setunitsepfalse}            % -21
+\newcommand{\atto}{a\@@setunitsepfalse}             % -18
+\newcommand{\femto}{f\@@setunitsepfalse}            % -15
+\newcommand{\pico}{p\@@setunitsepfalse}             % -12
+\newcommand{\nano}{n\@@setunitsepfalse}             %  -9
+\ifunit@@Ohm
+  \newcommand{\Micro}{\unitmu\@@setunitsepfalse}
+  \let\@unit@micro\Micro
+\else
+  \ifunit@@redefgensymb\else
+    \newcommand{\micro}{\unitmu\@@setunitsepfalse}
+  \let\@unit@micro\micro
+  \fi
+\fi
+\newcommand{\milli}{m\@@setunitsepfalse}            %  -3
+\newcommand{\centi}{c\@@setunitsepfalse}            %  -2
+\newcommand{\deci}{d\@@setunitsepfalse}             %  -1
+
+\newcommand{\deca}{da\@@setunitsepfalse}            %  +1
+\newcommand{\hecto}{h\@@setunitsepfalse}            %  +2
+
+\newcommand{\kilo}{k\@@setunitsepfalse}             %  +3
+\newcommand{\mega}{M\@@setunitsepfalse}             %  +6
+\newcommand{\giga}{G\@@setunitsepfalse}             %  +9
+\newcommand{\tera}{T\@@setunitsepfalse}             % +12
+\newcommand{\peta}{P\@@setunitsepfalse}             % +15
+\newcommand{\exa}{E\@@setunitsepfalse}              % +18
+\newcommand{\zetta}{Z\@@setunitsepfalse}            % +21
+\newcommand{\yotta}{Y\@@setunitsepfalse}            % +24
+
+%    \end{macrocode}
+% \subsection{Definitions of units}
+% \subsubsection{base units}
+%    \begin{macrocode}
+\newunit{\meter}{m}
+    \newunit{\gram}{g}
+\newunit{\kilogram}{\kilo\gram}
+\newunit{\mole}{mol}
+\newunit{\second}{s}
+\newunit{\ampere}{A}
+\newunit{\kelvin}{K}
+\newunit{\candela}{cd}
+
+%    \end{macrocode}
+% \subsubsection{Units of length}
+%    \begin{macrocode}
+
+\newunit{\picometer}{\pico\meter}
+\newunit{\nanometer}{\nano\meter}
+\newunit{\micrometer}{\@unit@micro\meter}
+\newunit{\millimeter}{\milli\meter}
+\newunit{\centimeter}{\centi\meter}
+\newunit{\decimeter}{\deci\meter}
+\newunit{\kilometer}{\kilo\meter}
+
+%    \end{macrocode}
+% \subsubsection{Units of weight}
+%    \begin{macrocode}
+
+\newunit{\femtogram}{\femto\gram}
+\newunit{\picogram}{\pico\gram}
+\newunit{\nanogram}{\nano\gram}
+\newunit{\microgram}{\@unit@micro\gram}
+\newunit{\milligram}{\milli\gram}
+
+%    \end{macrocode}
+% \subsubsection{Units of quantity}
+%    \begin{macrocode}
+
+\newunit{\femtomole}{\femto\mole}
+\newunit{\picomole}{\pico\mole}
+\newunit{\nanomole}{\nano\mole}
+\newunit{\micromole}{\@unit@micro\mole}
+\newunit{\millimole}{\milli\mole}
+
+
+%    \end{macrocode}
+% \subsubsection{Units of time}
+%    \begin{macrocode}
+                    
+\newunit{\attosecond}{\atto\sek}
+\newunit{\femtosecond}{\femto\sek}
+\newunit{\picosecond}{\pico\sek}
+\newunit{\nanosecond}{\nano\sek}
+\newunit{\microsecond}{\@unit@micro\sek}
+\newunit{\millisecond}{\milli\sek}
+
+
+%    \end{macrocode}
+% \subsubsection{amperage}
+%    \begin{macrocode}
+
+\newunit{\picoampere}{\pico\ampere}
+\newunit{\nanoampere}{\nano\ampere}
+\newunit{\microampere}{\@unit@micro\ampere}
+\newunit{\milliampere}{\milli\ampere}
+\newunit{\kiloampere}{\kilo\ampere}
+
+%    \end{macrocode}
+% \subsubsection{Percent}
+%    \begin{macrocode}
+
+\newunit{\percent}{\%}
+
+%    \end{macrocode}
+% \subsubsection{Volumes}
+%    \begin{macrocode}
+
+\ifunit@@liter
+  \newunit{\liter}{l}
+\else
+  \newunit{\liter}{L}
+\fi
+
+\newunit{\femtoliter}{\femto\liter}
+\newunit{\picoliter}{\pico\liter}
+\newunit{\nanoliter}{\nano\liter}
+\newunit{\microliter}{\@unit@micro\liter}
+\newunit{\milliliter}{\milli\liter}
+\newunit{\centiliter}{\centi\liter}
+\newunit{\deciliter}{\deci\liter}
+\newunit{\hectoliter}{\hecto\liter}
+
+\newunit{\cubicmeter}{\meter\unitsuperscript{3}}
+\newunit{\cubicmicrometer}{\micrometer\unitsuperscript{3}}
+\newunit{\cubicmillimeter}{\millimeter\unitsuperscript{3}}
+
+
+%    \end{macrocode}
+% \subsubsection{Areas}
+%    \begin{macrocode}
+
+\newunit{\squaremeter}{\meter\unitsuperscript{2}}
+
+\newunit{\ar}{a}
+\newunit{\hektar}{\hecto\ar}
+
+\newunit{\squarecentimeter}{\centimeter\unitsuperscript{2}}
+\newunit{\squaremillimeter}{\millimeter\unitsuperscript{2}}
+\newunit{\squarekilometer}{\kilometer\unitsuperscript{2}}
+%    \end{macrocode}
+% \subsubsection{more units of weight}
+%    \begin{macrocode}
+
+\newunit{\ton}{t}
+
+%    \end{macrocode}
+% \subsubsection{Derived electrical units}
+%    \begin{macrocode}
+
+\newunit{\volt}{V}
+\newunit{\millivolt}{\milli\volt}
+
+\newunit{\kilovolt}{\kilo\volt}
+
+\newunit{\watt}{W}
+\newunit{\milliwatt}{\milli\watt}
+\newunit{\kilowatt}{\kilo\watt}
+\newunit{\megawatt}{\mega\watt}
+
+\newunit{\coulomb}{C}
+%    \end{macrocode}
+% Don't forget the options when typesetting \textohm!
+%    \begin{macrocode}
+\ifunit@@Ohm
+  \newunit{\Ohm}{\unitOmega}
+  \newunit{\kiloohm}{\kilo\Ohm}
+  \newunit{\megaohm}{\mega\Ohm}
+  \newunit{\gigaohm}{\giga\Ohm}
+\else
+  \ifunit@@redefgensymb\else
+    \newunit{\ohm}{\unitOmega}
+  \fi
+  \newunit{\kiloohm}{\kilo\ohm}
+  \newunit{\megaohm}{\mega\ohm}
+  \newunit{\gigaohm}{\giga\ohm}
+\fi
+\newunit{\siemens}{S}
+\newunit{\millisiemens}{\milli\siemens}
+\newunit{\farad}{F}
+\newunit{\femtofarad}{\femto\farad}
+\newunit{\picofarad}{\pico\farad}
+\newunit{\nanofarad}{\nano\farad}
+\newunit{\microfarad}{\@unit@micro\farad}
+\newunit{\millifarad}{\milli\farad}
+%    \end{macrocode}
+% \subsubsection{Units of energy}
+%    \begin{macrocode}
+\newunit{\joule}{J}
+\newunit{\millijoule}{\milli\joule}
+\newunit{\kilojoule}{\kilo\joule}
+\newunit{\megajoule}{\mega\joule}
+
+\newunit{\calory}{cal}
+\newunit{\kilocalory}{\kilo\calory}
+\newunit{\electronvolt}{eV}
+\newunit{\millielectronvolt}{\milli\eV}
+\newunit{\kiloelectronvolt}{\kilo\eV}
+\newunit{\megaelectronvolt}{\mega\eV}
+\newunit{\gigaelectronvolt}{\giga\eV}
+\newunit{\teraelectronvolt}{\tera\eV}
+
+%    \end{macrocode}
+% \subsubsection{more units of time}
+%    \begin{macrocode}
+\newunit{\minute}{min}
+\newunit{\hour}{h}
+\newunit{\days}{d}
+%    \end{macrocode}
+% \subsubsection{more units of temperature}
+% Don't forget \paket{gensymb} when typesetting degree Celsius.
+%    \begin{macrocode}
+\ifunit@@Ohm
+  \newunit{\Celsius}{\unitCelsius}
+\else
+  \ifunit@@redefgensymb\else
+    \newunit{\celsius}{\unitCelsius}
+  \fi
+\fi
+%    \end{macrocode}
+% \subsubsection{Angles and arcs}
+%    \begin{macrocode}
+\newunit{\radian}{rad}
+\newunit{\steradian}{sr}
+\ifunit@@Ohm
+  \newnosepunit{\Degree}{\unitDegree}
+\else
+  \ifunit@@redefgensymb\else
+    \newnosepunit{\degree}{\unitDegree}
+  \fi
+\fi
+
+\newunit{\arcmin}{\ensuremath{{}^\prime}}
+\newunit{\arcsec}{\ensuremath{{}^{\prime\prime}}}
+%    \end{macrocode}
+% Some \TeX\ to realize the syntax using |;| as separator.
+%    \begin{macrocode}
+\DeclareRobustCommand{\arc}[1]{\expandafter\unit@arc#1;;!}
+
+\def\unit@arc#1;#2;#3!{%
+   \ifx\\#1\\\def\unit@arcdegreevalue{0}%
+   \else\def\unit@arcdegreevalue{#1}\fi%
+   \ifx\\#2\\\def\unit@arcminvalue{0}%
+   \else\def\unit@arcminvalue{#2}\fi%
+   \ifx\\#3\\\def\unit@arcsecvalue{0}%
+   \else\edef\unit@arcsecvalue{\expandafter\unit@strip#3;!}\fi%
+   \begingroup%
+     \let\unit@@xspace\relax%
+     \ifnum\unit@arcsecvalue=0\relax%
+       \ifnum\unit@arcminvalue=0\relax%
+         \ifnum\unit@arcdegreevalue=0\relax\else%
+           \unit@arcdegreevalue\degree% 
+         \fi%
+       \else%
+         \unit@arcdegreevalue\degree%
+         \unitvaluesep%
+         \unit@arcminvalue\arcmin%
+       \fi%
+     \else%
+       \unit@arcdegreevalue\degree%
+       \unitvaluesep%
+       \unit@arcminvalue\arcmin%
+       \unitvaluesep%
+       \unit@arcsecvalue\arcsec%
+     \fi%
+   \endgroup%
+}
+
+\def\unit@strip#1;#2!{%
+  \ifx\\#1\\0\else#1\fi%
+}
+
+%    \end{macrocode}
+% \subsubsection{Frequencies}
+%    \begin{macrocode}
+\newunit{\hertz}{Hz}
+  \newunit{\kilohertz}{\kilo\hertz}
+  \newunit{\megahertz}{\mega\hertz}
+  \newunit{\gigahertz}{\giga\hertz}
+
+%    \end{macrocode}
+% \subsubsection{Force}
+%    \begin{macrocode}
+\newunit{\newton}{N}
+  \newunit{\millinewton}{\milli\newton}
+  \newunit{\kilonewton}{\kilo\newton}
+%    \end{macrocode}
+% \subsubsection{Pressure}
+%    \begin{macrocode}
+\newunit{\pascal}{Pa}
+  \newunit{\hectopascal}{\hecto\pascal}
+\newunit{\uBar}{bar}
+  \newunit{\millibar}{\milli\uBar}
+%    \end{macrocode}
+% \subsubsection{magnetic field strength}
+%    \begin{macrocode}
+\newunit{\weber}{Wb}
+%    \end{macrocode}
+% \subsubsection{magnetic flux density}
+%    \begin{macrocode}
+\newunit{\tesla}{T}
+%    \end{macrocode}
+% \subsubsection{Induction}
+%    \begin{macrocode}
+\newunit{\henry}{H}
+%    \end{macrocode}
+% \subsubsection{Lumen}
+%    \begin{macrocode}
+\newunit{\lumen}{lm}
+%    \end{macrocode}
+% \subsubsection{Illuminance}
+%    \begin{macrocode}
+\newunit{\lux}{lx}
+%    \end{macrocode}
+% \subsubsection{Radioactivity}
+%    \begin{macrocode}
+\newunit{\becquerel}{Bq}
+  \newunit{\megabecquerel}{\mega\becquerel}
+\newunit{\curie}{Cu}
+%    \end{macrocode}
+% \subsubsection{Sievert}
+%    \begin{macrocode}
+\newunit{\sievert}{Sv}
+  \newunit{\millisievert}{\milli\sievert}
+%    \end{macrocode}
+% \subsection{Loading abbreviations}\label{sec:loading-abbr}
+% Now the abbreviations are loaded if no option is specified to
+% withhold some abbreviations.
+%    \begin{macrocode}
+\ifunit@@useabbrv
+  \ifunit@@useampabbrv
+     \InputIfFileExists{ampabbrv.cfg}%
+       {\PackageInfo{unitsdef}{Abbreviations for units of amperage loaded.}}%
+       {\PackageWarning{unitsdef}{ampabbrv.cfg not found!}}%
+  \fi
+  \ifunit@@usefreqabbrv
+     \InputIfFileExists{freqabbr.cfg}%
+       {\PackageInfo{unitsdef}{Abbreviations for units of frequency loaded.}}%
+       {\PackageWarning{unitsdef}{freqabbr.cfg not found!}}%
+  \fi
+  \ifunit@@usemolabbrv
+     \InputIfFileExists{molabbrv.cfg}%
+       {\PackageInfo{unitsdef}{Abbreviations for units of amount of substances loaded.}}%
+       {\PackageWarning{unitsdef}{molabbrv.cfg not found!}}%
+  \fi
+  \ifunit@@usevoltabbrv
+    \InputIfFileExists{voltabbr.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of voltage loaded.}}%
+      {\PackageWarning{unitsdef}{voltabbr.cfg not found!}}%
+  \fi
+  \ifunit@@usevolabbrv
+    \InputIfFileExists{volabbrv.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of volume loaded.}}%
+      {\PackageWarning{unitsdef}{volabbrv.cfg not found!}}%  
+  \fi
+  \ifunit@@useweightabbrv
+    \InputIfFileExists{weigabbr.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of weight loaded.}}%
+      {\PackageWarning{unitsdef}{weigabbr.cfg not found!}}%        
+  \fi
+  \ifunit@@useenergyabbrv
+    \InputIfFileExists{enerabbr.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of energy loaded.}}%
+      {\PackageWarning{unitsdef}{enerabbr.cfg not found!}}%
+  \fi
+  \ifunit@@uselengthabbrv
+    \InputIfFileExists{lengabbr.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of length loaded.}}%
+      {\PackageWarning{unitsdef}{lengabbr.cfg not found!}}%
+  \fi
+  \ifunit@@usetimeabbrv
+    \InputIfFileExists{timeabbr.cfg}%
+      {\PackageInfo{unitsdef}{Abbreviations for units of time loaded.}}%
+      {\PackageWarning{unitsdef}{timeabbr.cfg not found!}}%
+  \fi
+\fi
+\ifunit@@useconfigfile
+  \InputIfFileExists{unitsdef.cfg}%
+    {\PackageInfo{unitsdef}{Local config file loaded.}}%
+    {\PackageInfo{unitsdef}{No local config file found.}}%
+\else
+  \PackageInfo{unitsdef}{Local config file not loaded.}
+\fi
+%  
+%</package>
+%    \end{macrocode}
+% \PrintIndex
+% \Finale
+\endinput
diff --git a/Master/texmf-dist/source/latex/unitsdef/unitsdef.ins b/Master/texmf-dist/source/latex/unitsdef/unitsdef.ins
new file mode 100644
index 00000000000..3dd2ee9edca
--- /dev/null
+++ b/Master/texmf-dist/source/latex/unitsdef/unitsdef.ins
@@ -0,0 +1,52 @@
+%% 
+%% Copyright (C) 2004 by Patrick Happel
+%% 
+%% This file may be distributed and/or modified under the 
+%% conditions of the LaTeX Project Public License, either 
+%% version 1.2 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 1.2 or later is part of all distributions of 
+%% LaTeX version 1999/12/01 or later.
+%%
+\input docstrip.tex
+\keepsilent
+\usedir{tex/latex/unitsdef}
+\preamble
+
+This is a generated file. 
+
+Copyright (C) hyeari by hyour namei 
+
+This file may be distributed and/or modified under the 
+conditions of the LaTeX Project Public License, either 
+version 1.2 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 1.2 or later is part of all distributions of 
+LaTeX version 1999/12/01 or later. 
+
+\endpreamble
+
+\generate{\file{unitsdef.sty}{\from{unitsdef.dtx}{package}}}
+
+\obeyspaces
+\Msg{****************************************************} 
+\Msg{*                                                  *} 
+\Msg{* To finish the installation you have to move the  *} 
+\Msg{* following file into a directory searched by TeX: *} 
+\Msg{*                                                  *} 
+\Msg{* unitsdef.sty                                     *} 
+\Msg{*                                                  *} 
+\Msg{* To produce the documentation run the file        *} 
+\Msg{* unitsdef.dtx through LaTeX.                      *} 
+\Msg{*                                                  *} 
+\Msg{* Happy TeXing!                                    *} 
+\Msg{*                                                  *} 
+\Msg{****************************************************}
+
+\endbatchfile