>The Extensibility in XML comes from being able to create multiple
>vocabularies from a single syntax - not from recasting types. That is a
>feature of XSD.
this is arguable. One common usage of extensibility in the context of xml is
the extension of a known dialect of xml with some other namespace (often
rdf-xml because those rdf guys are always running around trying to get it in
everything) http://www.w3.org/DesignIssues/Toolbox.html gives examples. This
document doesn't seem to be focussed on reuse of schemas as providing some
sort of extensibility, nor does it seem to presume that by having made a
format in a language with extensibility in its name the format is by default
extensible.
Regards,
Bryan Rasmussen
