<chapter xmlns:xi="http://www.w3.org/2001/XInclude">

<para>
This is the first document, a, that then includes b.xml
<xi:include href="b.xml"/>
</para>

<para>
This is the second paragraph in a, a, that then includes c.xml
<xi:include href="c.xml"/>
</para>

<xi:include href="d.xml"/>

</chapter>
