<?xml version="1.0"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<book><chapter><title>Required Chapter</title><para>
At least one chapter, reference, part, or article is required in a book.
</para></chapter><appendix><title>Demonstration Appendix</title><para>
This appendix demonstrates an appendix in a book.  It has the
same broad content model as a chapter.
</para></appendix></book>
