W3C home > Mailing lists > Public > www-xml-schema-comments@w3.org > October to December 2001

variables and conditional statements

From: Jane Hunter <jane@dstc.edu.au>
Date: Tue, 20 Nov 2001 16:29:30 +1000
Message-Id: <200111200629.fAK6TP802127@piglet.dstc.edu.au>
To: www-xml-schema-comments@w3.org
I'm sending this query on behalf of Sylvain Devillers, for MPEG's 
Bitstream Syntax Description Language (BSDL) Ad-hoc Group.

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MPEG is currently investigating methods to enable scalable adaptation 
of multimedia content (audio, video & image) depending on available 
bandwidth/client capabilities etc. This technology is based on W3C 
XML-Schema and may become a part of the emerging MPEG-21 standard.

The proposed approach requires new features in XML Schema language, 
including:
- variables (as in XSLT)
- conditional statement (if/then/else...)

Since we would like to conform as closely as possible to XML Schema, we 
would like to know if there are any plans to introduce such features 
into future versions of XML Schema - and if so, when we could expect 
these to become available.

If there are no plans to introduce such features, are there other 
existing extensions or adjuncts to XML Schema, developed by other 
communities, which already provide such features.

    Sylvain Devillers,
    on behalf of the Bitstream Syntax Description Language (BSDL)
Ad-hoc Group

*********************

+-----------------------------+-------------------------------------+
| Jane Hunter                 | Senior Research Scientist           |
| DSTC Pty Ltd                | Distributed Systems Technology CRC  |
| Level 7, GP South           | Tel   : +61 7 3365 4310             |
| University of Queensland    | Fax   : +61 7 3365 4311             |
| Queensland 4072, Australia  | Email : jane@dstc.edu.au            |
+-----------------------------+-------------------------------------+
Received on Tuesday, 20 November 2001 01:29:34 GMT

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