This is basically what I'm doing. "query" is the SPARQL query string. I
will turn it into a Model, modify it and then, I want to rebuild it.
SPINModuleRegistry.get().init();
// Create an empty OntModel importing SP
Model model = ModelFactory.createDefaultModel();
model.setNsPrefix("rdf", RDF.getURI());
model.setNsPrefix("dbpedia", "http://dbpedia.org/resource/";);
Query arqQuery = ARQFactory.get().createQuery(model, query);
ARQ2SPIN arq2SPIN = new ARQ2SPIN(model);
Select spinQuery = (Select) arq2SPIN.createQuery(arqQuery, null);
// Then I add some rules to the model
Model modeloReglas = ModelFactory.createDefaultModel();
modeloReglas.read("reglas.ttl");
modeloConsulta.add(modeloReglas);
// And run the inferences (following another example from SPIN-API)
OntModel ontModel = JenaUtil.createOntologyModel(OntModelSpec.OWL_MEM,
modeloConsulta);
Model newTriples = ModelFactory.createDefaultModel();
ontModel.addSubModel(newTriples);
SPINInferences.run(ontModel, newTriples, null, null, false, null);
The inference rules add valid (I hope) triples to the SPIN SPARQL query.
At this point I have a model that has both a SPARQL Query (the original
with aditional parts) and some SPIN rules. I want to get the query from the
model (i can remove the rules from the model, if necesary).
There is a similar question in the mailing list, but in that case the
query was the body of a template, so it's easy to get the Resource. Here
the query it's something like this:
[ a <http://spinrdf.org/sp#Select> ;
<http://spinrdf.org/sp#resultVariables>
( [ <http://spinrdf.org/sp#varName>
"a"^^<http://www.w3.org/2001/XMLSchema#string> ] [
<http://spinrdf.org/sp#varName>
"b"^^<http://www.w3.org/2001/XMLSchema#string> ] [
<http://spinrdf.org/sp#varName>
"c"^^<http://www.w3.org/2001/XMLSchema#string> ] ) ;
<http://spinrdf.org/sp#where> ( [ <http://spinrdf.org/sp#object> [
<http://spinrdf.org/sp#varName>
"c"^^<http://www.w3.org/2001/XMLSchema#string> ] ;
<http://spinrdf.org/sp#predicate>
[
<http://spinrdf.org/sp#varName>
"b"^^<http://www.w3.org/2001/XMLSchema#string> ] ;
<http://spinrdf.org/sp#subject>
[
<http://spinrdf.org/sp#varName>
"a"^^<http://www.w3.org/2001/XMLSchema#string> ]
] )
] .
As I say early, probably the answer is trivial.
Thanks for your patience,
Jorge
On Wednesday, July 30, 2014 4:21:18 AM UTC-3, Holger Knublauch wrote:
>
> On 7/30/2014 15:42, Jorge Gastaldi wrote:
> >
> > Thanks for your answer!
> >
> >
> > I think that the problem is that I don't know how to create the Select
> > object ("spinQuery" in the example) without refering to the query
> string.
> >
> > From the example:
> > Select spinQuery = (Select) arq2SPIN.createQuery(arqQuery, null);
> >
> > arqQuery was created using the query String. I only have the Jena Model.
> >
> >
> > This is problably something trivial, but I'm quite at loss here.
>
> So is your starting point a Jena Resource instance? To convert that into
> a Select, use SPINFactory.asQuery(resource)
>
> If this doesn't help, I need to see a source code snippet where you are
> stuck.
>
> HTH
> Holger
>
>
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