A DocBook book can be divided into chapters such as:

<!--$Id: docs-xml-tags-en.xml,v 1.12 2004/09/30 14:25:36 tfox Exp $ -->

  <chapter id="ch-sample">
    <title>Sample Chapter</title>

    <para>This is a sample chapter, showing you the XML tags used to create a
    chapter, sections, and subsections.</para>
    
  </chapter>

The chapter can also be further divided into sections (sect1, sect2, sect3, etc.). Refer to Section 6.23, “Sections” for details.