Namespace conformance & SAX2

[Chris Nokleberg <chris@sixlegs.com>]

The Namespace spec adds additional conformance constraints beyond XML 1.0:
  * All element types and attribute names contain either zero or one colon.
  * No entity names, PI targets, or notation names contain any colons.

Is a non-validating SAX2 parser required to check these constraints?
My suggestion is that it should be required to check iff the
http://xml.org/sax/features/namespaces feature is true.

Thanks,
Chris