Re: Generate r2rml mapping document

Barry,

The R2RML support is fairly complete, but not as well-tested as the rest of D2RQ.

The main missing feature is support for named graphs.

It works well for creating RDF dumps of the DB (using D2RQ’s dump-rdf command). Virtual SPARQL endpoints over the DB *work*, but are very slow, as even fairly basic optimisations are still missing from the R2RML engine.

Best,
Richard


On 28 Mar 2014, at 11:50, Barry Norton <BNorton@britishmuseum.org> wrote:
> Richard, how complete now is the D2RQ implementation of R2RML 'execution' (enactment?) ?
> 
> You may have caught MusicBrainz' announcement of RDF/SPARQL support at: http://linkedbrainz.org/
> 
> This mapping is effected using R2RML: https://github.com/LinkedBrainz/MusicBrainz-R2RML
> and more than one RDB-mapping implementation is using these definitions for test, including Ultrawrap (used at MusicBrainz to produce the LinkedBrainz dump) and OBDA Semantika (see the latest 1.1.5 release notes).
> 
> I'd be very keen to try out the mappings using D2RQ if this is now feasible.
> 
> Cheers,
> 
> Barry
> 
> 
> 
> -----Original Message-----
> From: Richard Cyganiak [mailto:richard@cyganiak.de] 
> Sent: 28 March 2014 11:41
> To: Katerin
> Cc: SW-forum Web
> Subject: Re: Generate r2rml mapping document
> 
> Hi Katerin,
> 
> The unreleased R2RML-compatible version of D2RQ can generate R2RML mappings from the schema of an existing database.
> 
> You can find it as "d2rq-r2rml-preview-v4" here: http://download.d2rq.org
> 
> Use it like this:
> 
>    ./generate-mapping --r2rml -u user -p password jdbc:mysql://localhost/mydatabase
> 
> There is (currently incomplete) documentation in the /doc directory of the download.
> 
> The *very* latest version of that code, which may have more recent bugfixes, is available in the project's "develop" branch on GitHub: https://github.com/d2rq/d2rq
> 
> Hope that helps,
> Richard
> 
> 
> 
> On 21 Mar 2014, at 14:56, Katerin <kmrojas@estudiantes.uci.cu> wrote:
> 
>> I'm using r2rml-parser and I need the mapping document to this. I have 
>> been searching for a tool that generate the r2rml mapping document but 
>> I didn't find it, if you know about some tool to this I will be thanks for it.
>> Regards, Katerin. 
>> 
>> 
>> 
> 
>

Received on Friday, 28 March 2014 11:58:56 UTC