2 <xi:include href=
"b.xml" xmlns:
xi=
"http://www.w3.org/2001/XInclude">
3 <xi:fallback>There is no b.xml ...
</xi:fallback>
5 <xi:include href=
"c.xml" xmlns:
xi=
"http://www.w3.org/2001/XInclude">
6 <xi:fallback>There is no c.xml ...
</xi:fallback>