in reply to Automatically creating data validation module from XSD

Have you looked at XML::LibXML::Schema? I haven't used it but it looks like it might do exactly what you're looking for. That is to say that it doesn't build validation modules, but purports to validate XML against XSD and appears to have been much more recently updated than XML::Validator::Schema. 
perl -e 'split//,q{john hurl, pest caretaker}and(map{print @_[$_]}(joi
+n(q{},map{sprintf(qq{%010u},$_)}(2**2*307*4993,5*101*641*5261,7*59*79
+*36997,13*17*71*45131,3**2*67*89*167*181))=~/\d{2}/g));'

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