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Re: XML Schema

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Fri, 20 Jan 2006 10:50:26 +0000
To: "Jack Lindsey" <tuquenukem@hotmail.com>
Cc: xmlschema-dev@w3.org, chandrashekarrvt@gmail.com
Message-ID: <f5bvewf2mx9.fsf@erasmus.inf.ed.ac.uk>

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Jack Lindsey writes:

> Why was [XPath in Identity Constraints] so restricted and is that a
> good thing in your opinion?
>
> I mean it is not very orthogonal when compared to XPointer, XSLT,
> XQuery and Schematron.

The decision was based, IIRC, on a desire to minimize complexity, both
for readers and for implementors.

There was a particular concern to ensure that a streaming schema
validator could be built, something which a richer XPath subset would
have precluded.

ht
- -- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
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Received on Friday, 20 January 2006 10:50:40 GMT

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