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Re: Comments on the Charter of the XML Schema Working Group

From: <Simon.Cox@csiro.au>
Date: Sun, 5 Sep 2004 19:31:55 +0800
Message-ID: <2A2B2F12CF99EA4A898E2D4729441B41D781E1@exwa2-per.wa.csiro.au>
To: <www-xml-schema-comments@w3.org>
Cc: <w3c-xml-schema-ig@w3.org>

John Hockaday wrote:

"There needs to be some sort of PUBLIC identifier and Oasis Catalogue
system within the XML Schema specification so that one can identify on
his or her system where the validators can find the local copies of the
XML Schemas and so that one doesn't have to edit his or her XML Schemas
and XML Document Instances to find the location of the relative XML
Schemas."

It is not clear that this is an issue related to the XML Schema
specification. It is made quite clear in the XML Schema specification
that the values of both xsi:schemaLocation and xsd:schemaLocation
attributes should be treated as "hints"
(http://www.w3.org/TR/xmlschema-1/#xsi_schemaLocation,
http://www.w3.org/TR/xmlschema-1/#composition-schemaImport) for
precisely the reasons described - it is legal for a processor to prefer
a different source for descriptions of the components. So in fact it is
a processor configuration issue. And most XML Schema processors *do*
provide at least some support for OASIS Catalog - in the case of XML Spy
this is quite limited, but it is there so the tool may be configured. 

However, I believe that the issue is really the "processing model" for
which there is or was another W3C working group. See
http://www.xml.com/pub/a/2002/03/13/processing-model.html and
http://www.w3.org/TR/2004/NOTE-proc-model-req-20040405/

______
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Received on Sunday, 5 September 2004 11:32:30 UTC

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