Philip Taylor wrote:
Empty values for namespace prefix declarations are a well-formedness
error in all XML parsers that I'm aware of, so this document should
cause a fatal error (and no triples) in any RDFa-in-XML parser.
(I can't actually see where http://www.w3.org/TR/REC-xml-names/ really
says it's an error - the closest requirement is "If the attribute name
matches PrefixedAttName [...] the namespace name may not be empty",
which seems like misuse of RFC 2119 keywords but presumably is why
everyone implements it as a well-formedness error.)
(Whoops, I missed the bit where only emphasized terms are meant to be
interpreted as keywords, and also I missed the errata document that adds
"NSC: No Prefix Undeclaring. In a namespace declaration for a prefix
(i.e where the NSAttName is a PrefixedAttName), the attribute value MUST
NOT be empty.", so it seems clear enough.)
--
Philip Taylor
pj...@cam.ac.uk
