After last month's furure over the XHTML namespaces issue, the XHTML working group has reissued the draft specification. The spec has been unified under a single namespace and the problem of extending the spec using additional namespaces has been deferred.

The XHTML namespace may be used with other XML namespaces as per [XMLNAMES], although such documents are not strictly conforming XHTML 1.0 documents as defined above. Future work by W3C will address ways to specify conformance for documents involving multiple namespaces.