Re: [Rdfapi-php-interest] Running non-graph queries on a dataset

[Alexandre P. <al...@pa...>]

On 8/17/07, Richard Cyganiak <ri...@cy...> wrote:
> SPARQL Queries that don't use the GRAPH keyword match only the
> default graph. Are there any triples in the dataset's default graph?
No, I didn't put any triples in it.

So, if I understood well, as I want to make both graph and non-graph
queries over the same set of statements, each time I add a quad, I
also have to add the triple in the default graph, as:

// Loop to parse RDF files, identified by $uri
$name = $dataset1->getDefaultGraph()->graphName;
$dataset1->addQuad(new Quad(new Resource($uri), $statement->subj,
$statement->pred, $statement->obj));
$dataset1->addQuad(new Quad(new Resource($name), $statement->subj,
$statement->pred, $statement->obj));

But the problem is that queries using GRAPH will return the "original"
graph name, but also the defaut graph of the dataset. Is that the only
way to do ?

Thanks,

Alex.

>
> Cheers,
> Richard
>
>
> On 17 Aug 2007, at 10:52, Alexandre Passant wrote:
>
> > Hi,
> >
> > I'm trying to use RAP dataset API (v 0.95) with DB persistence, but I
> > can't see how to make 'non-graph' queries.
> >
> > I created my dataset using:
> >
> > $dbstore = ModelFactory::getDbStore();
> > $dbstore->createTables('MySQL');
> > $dataset1=& $dbstore->getDatasetDb('Dataset1');
> >
> > And then parsed some RDF files to add quads in it - BTW, is there a
> > way to add quads in the dataset by simply giving a graphURI and a
> > fileURI ?
> >
> > Then I used
> > $dataset1->sparqlQuery($query);
> >
> > to run queries, but while GRAPH queries return something, I have, for
> > simple spo queries:
> >
> > <sparql xmlns="http://www.w3.org/2005/sparql-results#"><head/
> > ><boolean/></sparql>
> >
> > Did I missed something with datasets / queries ?
> >
> > Thanks
> >
> > Alex.
> >
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