1 <book xmlns='http://docbook.org/ns/docbook'>
  2 <title>Example book</title>
    
  4 <chapter>
    <title>Required Chapter</title>
  6 
    <para>At least one chapter, reference, part, or article is required in
  8 a book.
    </para>
 10 
    </chapter>
 12 
    <appendix>
 14 <title>Demonstration Appendix</title>
    
 16 <para>This appendix demonstrates an appendix in a book. It has the
    same broad content model as a chapter.
 18 </para>
    
 20 </appendix>
    </book>