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3/28/2002 4:49:10 PM, Fredrik Lindgren <fredrik.lindgren@c...> wrote: >My main concern are the parts related to modification of schemas and >their impact on the whole design. What is discomforting is that >something called Abstract Schemas has constants, methods and attributes >that gives the impression of being a union of known schema constructs >rather than the intersection. You're right ... it is pretty much the intersection, or basically DTD functionality the details of the underlying schema language abstracted away. >The specified types of content models are a union of the ones for DTDs >and XML Schema. In DTDs we have AS_CHOICE and AS_SEQUENCE. XML Schema >has these and adds AS_ALL. As far as I can see some patterns that are >available in RELAX NG such as interleave can not be supported. The idea of using a string/URI to represent a wider range of options makes sense to me. I'll bring it up ... >Apart from RELAX NG having a problem with this DTD centric model I can't >say that it's obvious how a Schematron based schema would fit into the >model either. No, it's not :~) That was clearly not in scope a couple of years ago when the DOM AS work was begun, and I'm not sure that any useable abstraction COULD cover DTDs, RELAX, XSD, and Schematron. Ideas, anyone?
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