On Wed, 2011-11-30 at 12:15 +0100, Tran Thai Binh wrote: > Dear all, > I have a problem with inference value. I create two rdf files. One for > schema, one for data > For schema rdf file, I create subclass a2 of a1, and one dataproperty p1. > a2 have definition "a1 and p1 some float[>2]". For data rdf file, I create > some instant belongs to class a1 which have property p1. > > I want to run reasoner in Jena to get instant of class a2. I expect some > instant when I query for a2 but Jena returns nothing. I attach rdf files > and my code below. Could anyone help me to solve problem.
As explained earlier on jena-dev you need OWL 2 reasoning for your specific example. > At the moment i want to use Pellet as a reasoner but I donnot know how to > join these two rdf files. Please help me. You don't need to "join" those files. You can simply use the Pellet Reasoner the same way you currently are (bindSchema). If you want to join those files in your program you can use Model.add, for example data.add( schema ). The other option is to use owl:imports in your source data document to import the ontology file and then use the OntModel machinery to handle the imports for you. Dave > > Thank in advance. > Binh > > > > *(1) for schema* > > <?xml version="1.0"?> > <!DOCTYPE rdf:RDF [ > <!ENTITY owl "http://www.w3.org/2002/07/owl#"; > > <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#"; > > <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#"; > > <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > > <!ENTITY Ontology1322586150669 " > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#"; > > ]> > <rdf:RDF xmlns=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#"; > xml:base=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl"; > xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"; > xmlns:owl="http://www.w3.org/2002/07/owl#"; > xmlns:xsd="http://www.w3.org/2001/XMLSchema#"; > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > xmlns:Ontology1322586150669=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#";> > <owl:Ontology rdf:about=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl"/> > <!-- > ////////////////////////////// > ////////////////////////////// > /////////////////////////// > // > // Datatypes > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Data properties > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#p1--> > <owl:DatatypeProperty rdf:about="&Ontology1322586150669;p1"/> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Classes > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#a1--> > <owl:Class rdf:about="&Ontology1322586150669;a1"/> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#a2--> > <owl:Class rdf:about="&Ontology1322586150669;a2"> > <rdfs:subClassOf> > <owl:Class> > <owl:intersectionOf rdf:parseType="Collection"> > <rdf:Description rdf:about="&Ontology1322586150669;a1"/> > <owl:Restriction> > <owl:onProperty > rdf:resource="&Ontology1322586150669;p1"/> > <owl:someValuesFrom> > <rdfs:Datatype> > <owl:onDatatype rdf:resource="&xsd;float"/> > <owl:withRestrictions > rdf:parseType="Collection"> > <rdf:Description> > <xsd:minExclusive > rdf:datatype="&xsd;integer">2</xsd:minExclusive> > </rdf:Description> > </owl:withRestrictions> > </rdfs:Datatype> > </owl:someValuesFrom> > </owl:Restriction> > </owl:intersectionOf> > </owl:Class> > </rdfs:subClassOf> > </owl:Class> > </rdf:RDF> > <!-- Generated by the OWL API (version 3.2.3.22702) > http://owlapi.sourceforge.net --> > > *(2) for data* > <?xml version="1.0"?> > <!DOCTYPE rdf:RDF [ > <!ENTITY owl "http://www.w3.org/2002/07/owl#"; > > <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#"; > > <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#"; > > <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > > <!ENTITY Ontology1322586150669 " > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#"; > > ]> > <rdf:RDF xmlns=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586466073.owl#"; > xml:base=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586466073.owl"; > xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"; > xmlns:owl="http://www.w3.org/2002/07/owl#"; > xmlns:xsd="http://www.w3.org/2001/XMLSchema#"; > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > xmlns:Ontology1322586150669=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#";> > <owl:Ontology rdf:about=" > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586466073.owl"/> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Datatypes > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Data properties > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#p1--> > <owl:DatatypeProperty rdf:about="&Ontology1322586150669;p1"/> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Classes > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#a1--> > <owl:Class rdf:about="&Ontology1322586150669;a1"/> > <!-- > > /////////////////////////////////////////////////////////////////////////////////////// > // > // Individuals > // > > /////////////////////////////////////////////////////////////////////////////////////// > --> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#c--> > > <owl:NamedIndividual rdf:about="&Ontology1322586150669;c"> > <rdf:type rdf:resource="&Ontology1322586150669;a1"/> > <Ontology1322586150669:p1 > rdf:datatype="&xsd;float">5</Ontology1322586150669:p1> > </owl:NamedIndividual> > <owl:NamedIndividual rdf:about="&Ontology1322586150669;q"> > <rdf:type rdf:resource="&Ontology1322586150669;a1"/> > <Ontology1322586150669:p1 > rdf:datatype="&xsd;float">1</Ontology1322586150669:p1> > </owl:NamedIndividual> > <!-- > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#rf--> > <owl:NamedIndividual rdf:about="&Ontology1322586150669;rf"> > <rdf:type rdf:resource="&Ontology1322586150669;a1"/> > <Ontology1322586150669:p1 > rdf:datatype="&xsd;float">16</Ontology1322586150669:p1> > </owl:NamedIndividual> > </rdf:RDF> > <!-- Generated by the OWL API (version 3.2.3.22702) > http://owlapi.sourceforge.net --> > > *This is my code in Jena* > > package query; > import com.hp.hpl.jena.query.*; > import com.hp.hpl.jena.rdf.model.*; > import com.hp.hpl.jena.reasoner.*; > import com.hp.hpl.jena.util. > FileManager; > > public class query { > > public static void main(String[] args) { > > Model schema = FileManager.get().loadModel("O1.owl"); > Model data = FileManager.get().loadModel("O2.owl"); > > Reasoner reasoner = ReasonerRegistry.getOWLReasoner(); > reasoner = reasoner.bindSchema(schema); > InfModel infmodel = ModelFactory.createInfModel(reasoner, data); > > String queryString = > "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>"+ > "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>"+ > "PREFIX test: < > http://www.semanticweb.org/ontologies/2011/10/Ontology1322586150669.owl#>"+ > "select ?data " + > "where {?data a test:a2}"; > > Query query = QueryFactory.create(queryString); > > System.out.println("----------------------"); > System.out.println("Query Result Sheet"); > System.out.println("----------------------"); > System.out.println("Direct&Indirect Descendants (inf)"); > System.out.println("-------------------"); > > // Execute the query and obtain results > QueryExecution qe = QueryExecutionFactory.create(query, > infmodel); > ResultSet results = qe.execSelect(); > > // Output query results > ResultSetFormatter.out(System.out, results, query); > > qe.close(); > System.out.println("----------------------"); > > > } > } > >
