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RE: XQuery vs XML Query Algebra

From: Jonathan Robie <Jonathan.Robie@SoftwareAG-USA.com>
Date: Mon, 05 Mar 2001 09:40:41 -0500
Message-Id: <>
To: "Peter Fankhauser" <fankhaus@darmstadt.gmd.de>, <www-ql@w3.org>
At 12:50 PM 3/3/2001 +0100, Peter Fankhauser wrote:
> > Or, to put it another way, does XQuery fulfill the XML Query
> > Requirements any better than the Algebra would?

I agree with everything Peter said in his response to Michael.

>As pointed out above, the goals of the XQuery WD, and the
>the goals of the XML Query Algebra WD are complementary, so
>the question of which is "better" is hard to ask/answer. But indeed the
>more they agree syntax wise without compromising their purpose
>(readability vs. straightforward formalizability) the better.

Right. If the Algebra and the Query Language were so different that mapping 
was not straightforward, I would wonder if we had done something wrong. 
Aligning the syntax is also a useful goal - after all, mapping is not an 
end in itself. Phil Wadler likes to say that the Algebra should be a subset 
of the Query Language.

Received on Monday, 5 March 2001 09:39:27 UTC

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