Questions and Resources

Microsoft info http://msdn.microsoft.com/xml
Mozilla info http://www.mozilla.org/docs/ (near the bottom)
Perl http://www.perl.org, http://www.perl.com, http://activestate.com, http://www.perl.com/reference/query.cgi?xml
Python http://www.python.org, http://www.python.org/sigs/xml-sig/ (XML Special Interest Group)
Zope http://www.zope.org
REBOL http://www.rebol.com, http://www.rebol.org
Zvon tutorialshttp://zvon.vscht.cz/ZvonHTML/Zvon/zvonHomepage_en.html