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XML Schema issue LC-204 (was: XML Query Comments to XML Schema (2nd part))

From: C. M. Sperberg-McQueen <cmsmcq@acm.org>
Date: Thu, 29 Jun 2000 13:30:41 -0600
Message-Id: <4.1.20000629132427.01cc9580@tigger.cc.uic.edu>
To: Paul Cotton <paulcotton@alumni.uwaterloo.ca>, www-xml-schema-comments@w3.org
Cc: w3c-xml-query-wg@w3.org
At 12:28 00/05/29 -0400, Paul Cotton wrote:

>3.1 Operations
>There is a need for operations to be defined on base types. Schema
>doesn't define any built-in operations or provide any mechanism for
>user-defined operations on types. As a result, the Query WG needs to
>define these. The Query WG will also need to determine the type of the
>arguments to select the right operator (e.g., floating point
>vs. integer arithmetic) and do the appropriate type coercion. The type
>coercion rules need to be defined.  The Query WG is intending to
>define these operations and looks forward to doing this in cooperation
>with the Schema WG.

Thank you for your note.  For tracking purposes, this topic has been 
assigned issue number LC-204 in the XML Schema last-call issues 
document at 


During its teleconference today, the XML Schema WG took up this issue,
and agreed that it would indeed be useful for a joint task force of
members of the XML Schema and XML Query working groups to address the
topic and make recommendations.  Since, as you point out, the XML
Schema language does not define operations on types, we do not anticipate
that the work of the joint task will result in necessary changes to
the XML Schema specification, but we agree with you that it will be
useful for the work to be carried out jointly.

Paul Biron, David  Cleary, Martin Gudgin, Ashok Malhotra, and
Jonathan Robie volunteered to serve on the task force; other members
of the XML Schema WG may volunteer later.

-C. M. Sperberg-McQueen
 Dave Hollander
 co-chairs, W3C XML Schema WG
Received on Thursday, 29 June 2000 15:41:06 UTC

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