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Re: Scheduling chat: SPARQL, SQL & RDF

From: Chris Bizer <chris@bizer.de>
Date: Tue, 6 Jun 2006 12:25:39 +0200
To: <connolly@w3.org>, <danbri@danbri.org>, <danny.ayers@gmail.com>, "'Richard Cyganiak'" <richard@cyganiak.de>
Cc: <www-archive@w3.org>, <Lehmann.Christian@gmx.net>, "Seaborne, Andy" <Andy_Seaborne@hplb.hpl.hp.com>, <eric@w3.org>
Message-ID: <E1FnYla-0005j8-JP@maggie.w3.org>

Hi all,

I also cced Andy Seaborne, Eric Prud'hommeaux, Richard Cyganiak and
Christian Lehmann. To them, this mail is in reply to:

We are of course very interested in joining efforts on database to RDF
mapping. So a sceduled chat or a BOF at ESWC are both good ideas.

We plan to do the following stuff for D2RQ and D2R server in the next
- implement a smarter SPARQL-to-SQL rewriting algorithm, which will speed up
queries. Richard's "A relational algebra for SPARQL" was the first step into
this direction.
- do some fine tuning on the language and introduce some language constructs
that make it easier to write mappings or make the language more flexible.
Did anybody hear of use cases where something couldn't be mapped using D2RQ?
- improve Richard's tool for the automatic generation of mappings.
- write a nice setup routine which will make it easyer to get the server
- publish additional mappings for commonly used wikis, blogs and CMSs in
order to speed up the creation of public SPARQL endpoints.

So if anybody knows about related work or wants to contribute ideas to any
of the topics, everything is welcome.

Christian Lehmann (University Leipzig) is working on a D2RQ imlementation in
PHP. It would be great to be able to use D2RQ in PHP applications and we
hope to integrate his code into our RAP - RDF API for PHP.

Who of you is attending ESWC? What about a BOF meeting on Tuesday?


Chris Bizer
Freie Universitšt Berlin
Phone: +49 30 838 54057
Mail: chris@bizer.de
Web: www.bizer.de
Received on Tuesday, 6 June 2006 10:26:40 UTC

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