Dear all,
I have an owl file with name resto.owl, and created a simple rule using
construct like this :
CONSTRUCT {
?s :price_type ?p .
}
WHERE {
?s :highest_price ?h .
BIND (IF((?h > 3000), "EXPENSIVE", "CHEAP") AS ?p) .
}
Using TBC, I have run a simple sparql in SPARQL editor:
SELECT ?a ?b
WHERE {
?s :resto_name ?a .
?s :price_type ?b .
}
All worked perfect!
The problem is,
when I executed the same sparql using SPIN API, I got the right newTriplessize
but with no result in Sparql query.
Any help or hint will be appreciated.
Thanks.
This is my JSP script :
SPINModuleRegistry.get().init();
Model baseModel =
ModelFactory.createDefaultModel(ReificationStyle.Minimal);
baseModel.read("http://localhost/resto.owl";);
String vResult = "";
String query = "";
// Create OntModel with imports
OntModel ontModel =
ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM, baseModel);
// Create and add Model for inferred triples
Model newTriples =
ModelFactory.createDefaultModel(ReificationStyle.Minimal);
ontModel.addSubModel(newTriples);
// Register locally defined functions
SPINModuleRegistry.get().registerAll(ontModel, null);
// Run all inferences
SPINInferences.run(ontModel, newTriples, null, null, false, null);
vResult = " Found : " + String.valueOf(newTriples.size()) + "
triples <br/> "
+ "This is the data <br/><table border='1'>";
query = ""
+ " select ?a ?b "
+ " where { "
+ " ?s :resto_name ?a . "
+ " ?s :price_type ?b . "
+ " } ";
Query arqQuery = ARQFactory.get().createQuery(baseModel, query);
QueryExecution qexec =
ARQFactory.get().createQueryExecution(arqQuery, baseModel);
try {
ResultSet rs = qexec.execSelect();
for (; rs.hasNext();) {
QuerySolution qs = rs.nextSolution();
vResult += "<tr><td> "+
qs.getLiteral("a").getValue().toString() + "</td>";
vResult += "<td> "+
qs.getLiteral("b").getValue().toString() + "</td>";
vResult += "</tr>";
}
vResult += "</table>";
} finally {
qexec.close();
}
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