Check out the DCD submission

Tim Bray tbray at
Tue Aug 11 01:22:20 BST 1998

There's a new IBM/Microsoft submission at

I'm a co-author.  Here's the abstract:

 This document proposes a structural schema facility, Document Content 
 Description (DCD), for specifying rules covering the structure and content 
 of XML documents. The DCD proposal incorporates a subset of the XML-Data 
 Submission [XML-Data] and expresses it in a way which is consistent with 
 the ongoing W3C RDF (Resource Description Framework) [RDF] effort; in 
 particular, DCD is an RDF vocabulary. DCD is intended to define document 
 constraints in an XML syntax; these constraints may be used in the same 
 fashion as traditional XML DTDs. DCD also provides additional properties, 
 such as basic datatypes. 

I have lots of opinions about it, which can wait for Montreal now. -Tim

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