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+%%
+%% This is file `xkvex4.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% xkeyval.dtx (with options: `xkvex4')
+%%
+%% ---------------------------------------
+%% Copyright (C) 2004-2014 Hendri Adriaens
+%% ---------------------------------------
+%%
+%% 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 2003/12/01 or later.
+%%
+%% This work has the LPPL maintenance status "maintained".
+%%
+%% This Current Maintainer of this work is Hendri Adriaens.
+%%
+%% This work consists of the file xkeyval.dtx and derived files
+%% keyval.tex, xkvtxhdr.tex, xkeyval.sty, xkeyval.tex, xkvview.sty,
+%% xkvltxp.sty, pst-xkey.tex, pst-xkey.sty, xkveca.cls, xkvecb.cls,
+%% xkvesa.sty, xkvesb.sty, xkvesc.sty, xkvex1.tex, xkvex2.tex,
+%% xkvex3.tex and xkvex4.tex.
+%%
+%% The following files constitute the xkeyval bundle and must be
+%% distributed as a whole: readme, xkeyval.pdf, keyval.tex,
+%% pst-xkey.sty, pst-xkey.tex, xkeyval.sty, xkeyval.tex, xkvview.sty,
+%% xkvltxp.sty, xkvtxhdr.tex, pst-xkey.dtx and xkeyval.dtx.
+%%
+%% Load LaTeX kernel macros patch
+\RequirePackage{xkvltxp}
+
+%% keyi will set \keyi in xkveca.cls
+%% keyvi will set \keyvi in xkveca.cls and xkvesc.sty will pick
+%% it up from \documentclass and redefine it
+%% IgnoredGlobal and another=key will be considered as global
+%% options to be passed on to packages. Not used anymore.
+\documentclass[keyi=test1 on page \thepage,keyvi,another=key,IgnoredGlobal,10pt]{xkveca}
+
+%% keyii will set \keyii in xkvesa.sty
+%% keyiv will be passed to xkvesb.sty as unknown option
+%% the other input will be passed on to xkvesb as well.
+\usepackage[keyii=test2 on page \thepage,keyiv=test4 on page \thepage,test5]{xkvesa}
+
+%% keyvii will set \keyvii in xkvesc.sty
+\usepackage[keyvii]{xkvesc}
+
+\title{\textsf{xkeyval} package\\\normalsize\emph{Example 4}}
+\author{Hendri Adriaens}
+\setlength{\parindent}{0cm}
+
+\makeatletter
+\let\@tempa\@classoptionslist
+\let\@tempb\@unusedoptionlist
+\let\@tempc\XKV@classoptionslist
+\@onelevel@sanitize\@tempc
+
+\begin{document}
+\maketitle
+
+This example demonstrates the use of the new macros for declaring
+class and package options of the \textsf{xkeyval} package. Please
+study the files \verb+xkvex2.tex+, \verb+xkveca.cls+,
+\verb+xkvecb.cls+, \verb+xkvesa.sty+, \verb+xkvesb.sty+ and
+\verb+xkvesc.sty+ carefully to understand the output below.\\
+
+Set by \verb+xkveca.cls+: \keyi\par
+Set by \verb+xkvesa.sty+, copied from \verb+\documentclass+: \keyia\par
+Set by \verb+xkvesa.sty+: \keyii\par
+Set by \verb+xkvesb.sty+, passed on from \verb+xkvesa.sty+: \keyiii\par
+Set by \verb+xkvesb.sty+, passed on as unknown from \verb+xkvesa.sty+: \keyiv\par
+Set by \verb+xkvesb.sty+, passed on as unknown from \verb+xkvesa.sty+: \keyv\par
+Set by the class, copied by \verb+xkvesc.sty+: \keyvi\par
+Set by \verb+xkvesc.sty+: \keyvii\par
+Set by \verb+xkvecb.cls+, passed on from \verb+xkveca.cls+: \keyviii\\
+
+The document class is: \XKV@documentclass\par
+Unused global options: \texttt{\@tempb}\\
+
+Notice the content of the following macros.\par
+\verb+\@classoptionslist+: \texttt{\@tempa}\par
+\verb+\XKV@classoptionslist+:\par\texttt{\@tempc}\\
+
+This shows that \verb+key=value+ pairs have been deleted from the
+class options list so that subsequent packages which are not using
+\textsf{xkeyval} and are scanning this list will not run into
+problems.\\
+
+\newpage
+This page shows that key values are only expanded when they are
+actually used. They are not expanded during option processing.\\
+
+\keyi\par
+\keyii\par
+\keyiv
+
+\end{document}
+\endinput
+%%
+%% End of file `xkvex4.tex'.