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RE: about the "missing" axes in XQuery

From: Paul Cotton <pcotton@microsoft.com>
Date: Sat, 23 Aug 2003 19:32:33 -0400
Message-ID: <E7AC4500EAB7A442ABA7521D18814397063255E7@tor-msg-01.northamerica.corp.microsoft.com>
To: <jan.hidders@ua.ac.be>
Cc: <www-ql@w3.org>

In the XQuery specs published on Aug 22, you will note that we have
added the missing axes (except for the Namespace axes) to XQuery.  

Please see Section 2.6.3 Full Axis Feature:
http://www.w3.org/TR/2003/WD-xquery-20030822/#id-full-axis  

/paulc
Chair, XML Query WG

Paul Cotton, Microsoft Canada 
17 Eleanor Drive, Nepean, Ontario K2E 6A3 
Tel: (613) 225-5445 Fax: (425) 936-7329 
mailto:pcotton@microsoft.com

  

> -----Original Message-----
> From: www-ql-request@w3.org [mailto:www-ql-request@w3.org] On Behalf
Of
> Jan Hidders
> Sent: July 18, 2003 9:55 AM
> To: www-ql@w3.org
> Subject: about the "missing" axes in XQuery
> 
> 
> This has probably been asked several times before, but I couldn't find
it
> in
> the archives, so here goes.
> 
>   Why are there axes missing in XQuery?
> 
> I would assume this was to keep the language simple, but it seems to
me
> that
> many optimization tricks that are known for these missing axes become
more
> difficult or even impossible if the user has to simulate them. So not
> having
> these axes makes query optimization actually harder. So why are they
not
> in
> there?
> 
> Kind regards,
> 
> -- Jan Hidders
> 
>
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Received on Saturday, 23 August 2003 19:32:36 UTC

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