2. Documents
A data object is an _XML document_ if it is well-formed, as defined in
this specification.
[...]
2.1 Well-Formed XML Documents
A textual object is a well-formed XML document if:
1. Taken as a whole, it matches the production labeled _document_.
[...]
So, to my reading, if it doesn't match _document_, it isn't XML, and
is outside the scope of the spec. The XML spec shouldn't dictate
error-handling behavior for non-XML objects; otherwise, future
browsers would be required not to process GIFs, Word documents, HTML,
etc. That would be silly.
-Chris
-- <!NOTATION SGML.Geek PUBLIC "-//Anonymous//NOTATION SGML Geek//EN"> <!ENTITY crism PUBLIC "-//O'Reilly//NONSGML Christopher R. Maden//EN" "<URL>http://www.oreilly.com/people/staff/crism/ <TEL>+1.617.499.7487 <USMAIL>90 Sherman Street, Cambridge, MA 02140 USA" NDATA SGML.Geek>