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Re: Version 1.4 of XSV released: derivation-by-restriction experiment

Noah_Mendelsohn@lotus.com writes:

> Henry: do you have any implementation experience that would bear on the 
> practicality and scaleability of this as a general solution?  Are you 
> computing the intersection of the models, or are you just double 
> validating against both base and derived?  Thanks.

Neither.  Intersection is not what's wanted, subsumption is.

What I do is 'parse' every path through the derived type's content
model with the base type's content model.

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/