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At 03:46 PM 7/31/00 -0700, yimin zhu wrote: >I recently attended an XML training course and the instructor was teaching >DTD rather than schema, so I asked him if there were still a lot of people >using DTD rather than schema. I got a "yes", but I was not convinced. Does >anyone have any idea? Besides the reasons various people have already given, remember that there are certain things that you can do with DTDs, such as declare external entities, that I don't believe that you can do with any existing schema specs. So whatever the future of schemas for declaring constraints on document structure and content, DTDs aren't going away in the forseeable future as the place to make such declarations. And the question of how to handle the case where both the DTD and schema contain content model constraints is not easy to answer. I write this [sorry, Lauren!] while listening to the DOM WG beat their collective heads against the wall trying to figure this out ... and lets not even talk about the little nuggets of complexity that namespaces throw into this toxic stew.
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