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RE: Potential TAG issue in re consistency, Schema, etc.

From: Rick Jelliffe <ricko@topologi.com>
Date: Fri, 18 Oct 2002 21:45:47 +1000
Message-ID: <034501c2769b$e6cf29e0$4bc8a8c0@AlletteSystems.com>
To: <www-tag@w3.org>

From: "Dare Obasanjo" <dareo@microsoft.com>

> XPath 2.0 and XQuery use W3C XML Schema as a basis for a type system and 
> not merely as a validation language. 

But XQuery has its own data model and  "The data model does not represent element 
or attribute declaration schema components, but it supports various type-related 
operations." [1]   

The distinctive feature of WXS is not the type lattice in a resulting type-augmented
infoset (other schema languages could be invented to provide that, if there were
a reason) as much as its specific components: elements, abstract types, 
substitution groups, etc.

(And, for the an interesting disconnect between XQuery and WXS, see also
http://lists.w3.org/Archives/Member/w3c-xml-query-wg/2002Oct/0317.html)


Cheers
Rick Jelliffe

[1] http://www.w3.org/TR/query-datamodel/#types
Received on Friday, 18 October 2002 07:46:18 GMT

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