- From: Philip Taylor <pjt47@cam.ac.uk>
- Date: Thu, 04 Jun 2009 22:56:41 +0100
- To: Shane McCarron <shane@aptest.com>
- CC: "public-rdf-in-xhtml-tf.w3.org" <public-rdf-in-xhtml-tf@w3.org>
Shane McCarron wrote: > Inspired by a couple of Philips tests... > [...] > <div id="author" about="#author" xmlns:foaf=""> 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.) (In text/html there is no concept of well-formedness and no fatal parse errors, and no specification defines how xmlns attributes are meant to be processed in that environment; I don't have preferences for any particular behaviour, as long as it's clearly defined somewhere.) -- Philip Taylor pjt47@cam.ac.uk
Received on Thursday, 4 June 2009 21:57:20 UTC