W3C home > Mailing lists > Public > www-rdf-interest@w3.org > June 2004

Re: ANN: D2RQ Jena plug-in released for treating non-RDF databases as virtual RDF graphs]

From: Chris Bizer <chris@bizer.de>
Date: Wed, 23 Jun 2004 10:07:56 +0200
Message-ID: <004801c458f9$3105c820$0f8d2da0@wrz03295>
To: <danny666@virgilio.it>, <foafnet@yahoogroups.com>, <www-rdf-interest@w3.org>

Hi Danny,

> forwarded over to foafnet list as there is the general lurking issue of
> CMSs with existing DBs that are unlikely to get swapped out for
> triplestores...
>

yes, I also have thought about CMS, blog, forum and other standard software.
It would be nice to have a website, which collets D2RQ mappings for the
databases of the most commonly used open source systems. Then a
administrator could just download Joseki and D2RQ together with the mapping
file for this system and his data would be availible on the Semantic Web
(even without him knowing in detail what the Semantic Web and RDF is :-)

Chris


> -------- Original Message --------
> Subject: ANN: D2RQ Jena plug-in released for treating non-RDF databases
> as virtual RDF graphs
> Resent-Date: Tue, 22 Jun 2004 08:19:14 -0400 (EDT)
> Resent-From: www-rdf-interest@w3.org
> Date: Tue, 22 Jun 2004 14:18:10 +0200
> From: Chris Bizer <chris@bizer.de>
> To: <www-rdf-interest@w3.org>
> CC: Richard Cyganiak <richard@cyganiak.de>, <wilkinson@hpl.hp.com>,
> <kers@hpl.hp.com>, Seaborne, Andy <Andy_Seaborne@hplb.hpl.hp.com>,
> <dwood@tucanatech.com>, Krishnamurthy, Venkat
> <Venkat.Krishnamurthy@gs.com>, Leo Sauermann <leo@gnowsis.com>, Sunil
> Goyal <sgoyal@salzburgresearch.at>,
> <nbi_wn@lists.spline.inf.fu-berlin.de>, Uwe Suhl
<suhl@wiwiss.fu-berlin.de>
>
>
>
> Hi all,
>
> we released the initial version of the D2RQ Jena plug-in under General
> Public License today.
>
> D2RQ is a declarative mapping language for treating non-RDF databases as
> virtual RDF graphs within the Jena toolkit.
>
> Using D2RQ you can:
>
> 1. access information in a non-RDF database using the Jena model API.
> 2. query a non-RDF database using RDQL or find(spo).
> 3. do RDFS and OWL inferencing over the content of a non-RDF database
using
> the Jena ontology API.
> 4. publish the content of a non-RDF database on the Semantic Web using the
> Joseki RDF server.
>
> The goal of D2RQ is to expose the content of huge, live, non-RDF databases
> to the Semantic Web without having to replicate the database into RDF.
>
> D2RQ is implemented as a Jena graph, the basic information representation
> object within the Jena framework. A D2RQ graph wraps one or more local
> relational databases into a virtual, read-only RDF graph. It rewrites Jena
> API calls, find() and RDQL queries to application-data-model specific SQL
> queries. The result sets of these SQL queries are transformed into RDF
> triples which are passed up to the higher layers of the Jena framework.
>
> For more information about D2RQ see
> 1. the D2RQ User Manual and Language Specification:
> http://www.wiwiss.fu-berlin.de/suhl/bizer/d2rq/spec/index.htm
> 2. the D2RQ Website:
> http://www.wiwiss.fu-berlin.de/suhl/bizer/d2rq/index.htm
>
> The D2RQ Jena plug-in can be downloaded from:
> http://sourceforge.net/projects/d2rq-map/
>
> Lots of thanks to
> 1. Andy Seaborne (HP Labs, Bristol), Chris Dollin (HP Labs, Bristol) and
> Kevin Wilkinson (HP Labs, Palo Alto) for their feedback on the D2RQ
language
> specification.
> 2. Richard Cyganiak (FU Berlin) for helping to implement D2RQ and for
> developing a performance test suite for D2RQ (results will be released
> soon).
>
> Cheers,
>
> Chris Bizer
>
>
>
>
>
>
>
>
> -- 
>
> Raw
> http://dannyayers.com
>
>
Received on Wednesday, 23 June 2004 04:03:06 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 7 December 2009 10:52:07 GMT