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]"
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.
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("----------------------");
}
}
--
Trần Thái Bình
GIS and Remote Sensing
thaibinht...@gmail.com
ttb...@vast-hcm.ac.vn
Phone: (848) 38247360
mobile:
- Việt Nam -
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