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-\documentclass[a4paper]{article}
-\usepackage[scale=0.75]{geometry}
-\usepackage{shortvrb}
-\MakeShortVerb{\|}
-\newcommand{\PkgVersion}{1.1}
-\newcommand{\PkgDate}{2020/09/25}
-\newcommand{\Pkg}[1]{\textsf{#1}}
-\newcommand{\Meta}[1]{$\langle$\textit{#1}$\rangle$}
-\newcommand{\Note}{\par\noindent \textbf{NB:}\quad}
-\newcommand{\Means}{~:\quad}
-\providecommand{\eTeX}{$\varepsilon$-{\TeX}}
-%-----------------------------------------------------------
-\begin{document}
-\title{The \Pkg{bxcalcux} package}
-\author{Takayuki YATO\quad (aka.~``ZR'')}
-\date{v\PkgVersion \quad[\PkgDate]}
-\maketitle
-
-%===========================================================
-\section{Overview}
-
-This package allows one to create a new unit of length
-that can be used in length expressions
-of the \Pkg{calc} package.
-For example,
-\begin{quote}\small\begin{verbatim}
-\newcalcunit{thou}{0.07227pt}% thousandth of inch
-\setlength{\lengthA}{10thou}
-\end{verbatim}\end{quote}
-will assign 0.72266\,pt to |\lengthA|.%
-\footnote{Using \texttt{0.001in} instead of
-\texttt{0.07227pt} will give rather inaccurate results,
-since \texttt{0.001in} is evaluated to 0.7277\,pt.}
-
-\paragraph{Supported format} \LaTeX.
-\paragraph{Supported engine} Any engine with {\eTeX} extension.
-\paragraph{Prerequisite packages}
-\Pkg{calc}, \Pkg{etoolbox}.
-
-%===========================================================
-\section{Package Loading}
-
-Use |\usepackage| as usual, with no options.
-\begin{quote}\small\begin{verbatim}
-\usepackage{bxcalcux}
-\end{verbatim}\end{quote}
-
-%===========================================================
-\section{Usage}
-
-\begin{itemize}
-\item |\newcalcunit{|\Meta{unit}|}{|\Meta{length}|}|\Means
-Declares a new unit \Meta{unit} as equal to \Meta{length}.
-The unit name must consist only of alphabets.
-You can use relative units such as |0.5em| in \Meta{length},
-and such relative units are resolved
-when \Pkg{calc} expressions are evaluated.
-
-\item |\DeclareCalcUnit{|\Meta{unit}|}{|\Meta{text}|}|\Means
-\textsl{(for {\TeX}nicians)}
-Declares a new unit \Meta{unit} as equal to the unit
-expressed by a token list \Meta{text},
-which must form a ``unit of dimen'' (in {\TeX} terminology).
-Here is an example.
-\begin{quote}\small\begin{verbatim}
-\DeclareCalcUnit{ls}{\baselineskip}% current line skip
-\end{verbatim}\end{quote}
-
-\end{itemize}
-
-%===========================================================
-\section{Notices}
-
-\begin{itemize}
-\item Usually unit names are treated as case-insensitive;
-but as exception, unit names with a single letter are
-case-sensitive.
-\item You must not create a unit name that coincides
-with a prefix of existing (built-in or created) units
-or any keywords that could be used in \Pkg{calc} expressions
-(such as |plus|, |fil|, etc.); otherwise unexpected
-things would occur.
-\end{itemize}
-
-%===========================================================
-\end{document}