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Sean McGrath wrote: > [Jonathon Borden] > >In our rush to 'move beyond' DTDs we sometimes neglect > >the lowly internal subset which _is_ instance data, so for example > >specifications like SOAP which are now stuck with the inability to have IDs > >(shrug). > > The case against internal subsets is compelling IMHO. They don't round > trip. This creates significant problems for software developers > working with hetrogenous, loosely coupled XML processing > systems. i.e. anything other than XML "viewers". > > I have droned on about this for years now and > will spare everyone a replay[1] :-) > > I believe (correct me if I'm wrong James) that James Clark > is referring to this problem when he says of the internal > subset approach to this problem ([2]) > > "(iii) It doesn't work with streaming output. This is in my view the most > important technical problem" > Err, so wouldn't it be easier to fix the streaming output systems (I believe Xalan already implements the SAX DeclHandler interface on its default output handler) than to: 1) Create an entirely new specification 2) Update every XML parser and XPath and DOM implementation 3) Deploy the new implementions The problem is in _implementations_ not _specifications_. Perhaps I am missing something? James: On the other hand I _do_ think there is value in 'moving beyond' DTDs to XML syntax schemas. Since you are working with RELAXNG, rather than propose _xml:atts_ which is a partial solution to the problem, will you include the _xml:atts_ proposal as a part of RELAXNG in some fashion? Jonathan
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