Re: [relax-ng] Competitive analysis

xsi:nil="true" in XML Schema means that the content of an element is
intentionally empty. The fact that it is empty is supposed to indicate
something like <ilikekumquats xsi:nil="true"></ilikekumquats> or some such.
The element must be declared with a nillable="true" attribute in the schema
and the namespace for XMLSchema-instance must also be declared in the
instance.

Mike