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Rick Jelliffe wrote: > Actually, it does not even need any change in DTD syntax AFAIK. > It just needs a change in the way that validation is performed using DTDs. > > The validator needs to understand that given > <!ATTLIST x xmlns CDATA "123"> > or > <!ATTLIST x xmlns CDATA #FIXED "123"> > etc. that an instance with > <y:x xmlns:y="123"> > is correct. Funny. MSXML implemented this a while back and Microsoft was pilloried for not being standards compliant :) Personally, I always thought it was a good way to resolve the namespaces / DTD dilemma. > You would also need the rule that an unprefixed element name > could only be declared once per DTD, which is not particularly > objectionable. Another possibility is that any element in a namespace would have to declare that namespace, regardless of whether it was the default namespace or a namespace using a prefix. Some sort of restriction along these lines is necessary anyway, since element declarations form a (possibly cyclical) graph and the notion of "earlier in the graph" is a bit tenuous. -- Ron
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