1<x xmlns:xinclude="http://www.w3.org/2001/XInclude">
2   <!-- Simple test of a fallback on unavailble URI -->
3   <xinclude:include href="something.xml">
4     <xinclude:fallback><warning>Inclusion failed</warning></xinclude:fallback>
5   </xinclude:include>
6</x>
7