Why was it 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.

Cheers  Jack Lindsey


>From: ht@i... (Henry S. Thompson)
>To: Chandrasekhar A <chandrashekarrvt@g...>
>CC: xmlschema-dev@w...
>Subject: Re: XML Schema
>Date: Wed, 11 Jan 2006 15:29:53 +0000
>
>
>-----BEGIN PGP SIGNED MESSAGE-----
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>Chandrasekhar A writes:
>
> > Is it possible to specify XPATH functions in XS:field, XML schema 
>element ?
> > Like
> >
> > <xs:field xpath="concat('abc','def')/>
>
>No.  The allowed XPath subset is very restricted and is set out
>explicitly in the REC [1].
>
>ht
>
>[1] http://www.w3.org/TR/xmlschema-1/#coss-identity-constraint
>- --
>  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@i...
>                    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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From mike@s... Fri Jan 20 08:43:20 2006
Received: from maggie.w3.org ([193.51.208.6