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Re: Supplemental XQuery reading list

From: Eric Prud'hommeaux <eric@w3.org>
Date: Thu, 15 Apr 2004 13:20:09 -0400
To: Howard Katz <howardk@fatdog.com>
Cc: RDF Data Access Working Group <public-rdf-dawg@w3.org>
Message-ID: <20040415172009.GE25212@w3.org>

On Thu, Apr 15, 2004 at 09:33:30AM -0700, Howard Katz wrote:
> 
> Here's the additional reference on XQuery for those who like lots of code
> snippets when exploring new languages:
> 
>      http://www.datadirect.com/news/whatsnew/xquerybook/index.ssp
> 
> This is Jonathan's Robie's Chapter One tutorial introduction to XQuery from
> "XQuery from the Experts". It's lengthy (78 pages I think) but highly
> readable.
> 
> Who was it that requested pointers on XQuery and SQL? Was that you, Andy?
> Sorry, I didn't jot down what your specific interest was. If you can let me
> know, I can point you in the appropriate direction.

I can't speak to Andy's agenda, but one point that's been kicking
around in the XQuery/RDF Query arena for a while is that XQuery can be
used to express SQL queries so it must be able to express RDF
queries. I've seen a couple approaches that I believe workable [1]
[2], but would like to see how people solve the problem for SQL.

I suspect that in standardizing an RDF query language we are going
beyond where existing SQL mappings to XQuery have gone in that we want
*one* mapping to XQuery that operates on XQuery+whatever
implementations from different vendors. Does such a "standard" mapping
to SQL exist?

[1] http://www.w3.org/2001/11/13-RDF-Query-Rules/#XQueryFA
[2] http://www.w3.org/2001/11/13-RDF-Query-Rules/#TreeHugger
-- 
-eric

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