Hi Shahim,

On 2 Jun 2011, at 10:45, Shahim Essaid wrote:
> I am new to D2RQ and Joseki. I have a database mapped and I can query it
> from the D2RQ web interface. I also managed to setup a Joseki dataset
> with an owl ontology in a named graph and the same ontology with pellet
> in another graph.
> 
> I am now interested in writing sparql queries that use the ontology in
> the named graphs and the mapped data from D2RQ. Is there any way for
> doing this?
> 
> I saw few posts from two or three years ago about not being able to have
> a dataset in Joseki that can query D2RQ at<http://localhost:2020/all>
> with other named graph (my ontology) in the dataset. Did I understand
> this limitation correctly?  

Yes. D2RQ has its own SPARQL engine which only handles D2RQ models and doesn't 
mix with other models.

> Do I have to dump the database by using D2RQ
> and then load the rdf file into a Joseki dataset?

If the size of your DB is manageable, then this is the easiest way to go.

Best,
Richard


> 
> When I try to query in the Joseki web interface with a FROM
> <http://localhost:2020/all>  I only see the vocabulary from the D2RQ
> mapping file, no data triples.
> 
> Thank you,
> Shahim
> 
> 
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