Deployment Issues
RDF Schemas vs. ěXML Schemasî
- The problems of controlled vocabulary metadata and self-describing DTDs are close enough to cause confusion
- XML-Data, by Microsoft & Co conflates the two
- DTDs-in-XML is a work item before the rechartered XML WG
URI versioning issues
- As with DTDs, the permanence of the schema identifier is a popular red herring (as is ěperformanceî)
Compatibilty with ëpushí product formats
- Channel Definition Format, Open Software Description,...
But products and services are shipping...