LC-198: Provide type-information in PSV Infoset

The W3C XML Schema Working Group has spent the last several months
working through the comments received from the public on the last-call
draft of the XML Schema specification.  We thank you for the comments
you made on our specification during our last-call comment period, and
want to make sure you know that all comments received during the
last-call comment period have been recorded in our last-call issues
list (http://www.w3.org/2000/05/12-xmlschema-lcissues).

Among other issues, you raised the point registered as issue LC-198,
requesting more detailed type definition information in the
post-schema-validation infoset.

The WG has agreed with this request, conditionally.  That is, we have
specified in detail (in the most recent PWD [1]) how a schema-aware
processor should record the schema components, including the type
definition components, used to assess the schema-validity of element
and attribute information items.  This information, if provided, is
sufficient to determine all type-definition-subsumption relations
relevant to XML Query, as we understand it.

However the WG did not feel able to _require_ conformant processors to
provide this level of detail, so the provision of component-isomorphic
information items is optional (although the _names_ of type
definitions must be provided by all conformant processors).  We expect
that XML Query will simply require that schema-validity assessment for
Query _does_ in fact provide it.

It would be helpful to us to know whether you are satisfied with the
decision taken by the WG on this issue, or wish your dissent from the
WG's decision to be recorded for consideration by the Director of
the W3C.

ht
-- 
  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/

Received on Saturday, 7 October 2000 07:09:58 UTC