THE XML REVOLUTION - TECHNOLOGIES FOR THE FUTURE WEB

An XInclude example

A document containing:

`<foo xmlns:xi="http://www.w3.org/2001/XInclude"> <xi:include href="somewhere.xml"/> </foo>`

where somewhere.xml contains:
<bar>...</bar>

`<bar>...</bar>`

is equivalent to:
<foo xmlns:xi="http://www.w3.org/2001/XInclude"> <bar>...</bar> </foo>

`<foo xmlns:xi="http://www.w3.org/2001/XInclude"> <bar>...</bar> </foo>`

http://www.w3.org/2001/XInclude is the official XInclude namespace
the include element name in that namespace is an inclusion directive
right after parsing and before other processing, an XInclude processor performs the inclusion (tree substitution)
the original and the resulting document should be considered equivalent
it is an error to have cyclic includes