<!DOCTYPE set PUBLIC "-//OASIS//DTD DocBook V3.1//EN" [
<!ENTITY prefs "
<preface><title>Forward</title>
<para>para</para>
</preface>
<preface><title>Introduction</title>
<para>para</para>
</preface>">
<!ENTITY chaps "
<chapter><title>First Chapter</title>
<para>para</para>
</chapter>
<chapter><title>Second Chapter</title>
<para>para</para>
<sect1><title>First Section</title>
<sect2><title>First Subsection</title>
<sect3><title>First Subsubsection</title>
<sect4><title>First Subsubsubsection</title>
<sect5><title>First Subsubsubsubsection</title>
<para>para</para>
</sect5>
<sect5><title>Second Subsubsubsubsection</title>
<para>para</para>
</sect5>
</sect4>
<sect4><title>Second Subsubsubsection</title>
<para>para</para>
</sect4>
</sect3>
<sect3><title>Second Subsubsection</title>
<para>para</para>
</sect3>
</sect2>
<sect2><title>Second Subsection</title>
<para>para</para>
</sect2>
</sect1>
<sect1><title>Second Section</title>
<para>para</para>
</sect1>
</chapter>
<chapter><title>Third Chapter</title>
<para>para</para>
</chapter>">
<!ENTITY apps "
<appendix><title>First Appendix</title>
<para>para</para>
</appendix>
<appendix><title>Second Appendix</title>
<para>para</para>
</appendix>">
]>
<set><title>Set Title</title>
<book><title>Book 1 Title</title>
&prefs;
&chaps;
&apps;
</book>
<book><Title>Book 2 Title</title>
&prefs;
<part><title>First Part</title>
&chaps;
</part>
<part><title>Second Part</title>
&chaps;
</part>
&apps;
</book>
</set>


