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   Re: DTD vs Schema

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  • From: David Megginson <david@megginson.com>
  • To: "XML Developers' List" <xml-dev@ic.ac.uk>
  • Date: Thu, 10 Sep 1998 09:33:25 -0400

James Tauber writes:

 > DTDs are the only finalised schema language for XML at
 > present. Alternatives such as DCD, XML-Data and XSchema are
 > proposals still being developed (although it looks like DCD
 > replaces XML-Data).

Since XML-Data was never a work item for a W3C working group, there is
no one who can official declare its passing, but yes, it's dead.

I still haven't had time to give XSchema a proper going-over, but from
what I've seen, XSchema and DCD are not competing for the same

- XSchema defines an instance-based representation of DTDs
- DCD defines an alternative to DTDs

Does this make sense?

All the best,


David Megginson                 david@megginson.com

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