This may or may not be the entire problem, but in the line: > String querystring="PREFIX ss:<http://www.semanticweb.org"; +"SELECT ?x" + > "WHERE {" + "?x ss:hasson ss:zia" + "}";
you opened the angle-brackets around your namespace without closing them. --- A. Soroka The University of Virginia Library On Aug 20, 2015, at 4:15 PM, kumar rohit <[email protected]> wrote: > import java.io.InputStream; > > import com.hp.hpl.jena.ontology.OntDocumentManager; > import com.hp.hpl.jena.ontology.OntModel; > import com.hp.hpl.jena.ontology.OntModelSpec; > import com.hp.hpl.jena.query.Query; > import com.hp.hpl.jena.query.QueryExecution; > import com.hp.hpl.jena.query.QueryExecutionFactory; > import com.hp.hpl.jena.query.QueryFactory; > import com.hp.hpl.jena.query.ResultSet; > import com.hp.hpl.jena.query.ResultSetFormatter; > import com.hp.hpl.jena.rdf.model.ModelFactory; > import com.hp.hpl.jena.util.FileManager; > > > public class famtree { > static final String inputfile =("C://Users//asad > ali//Desktop//Project//protege//relation.owl"); > > public static void main(String[] args) { > OntDocumentManager mgr=new OntDocumentManager(); > > OntModelSpec spec=new OntModelSpec(OntModelSpec.OWL_DL_MEM); > > spec.setDocumentManager(mgr); > > OntModel m = ModelFactory.createOntologyModel(spec,null); > > InputStream in=FileManager.get().open(inputfile); > if (in==null) > { > throw new IllegalArgumentException("File" + inputfile + "not found"); > } > m.read(in,""); > > String querystring="PREFIX ss:<http://www.semanticweb.org"; +"SELECT ?x" + > "WHERE {" + "?x ss:hasson ss:zia" + "}"; > > Query query=QueryFactory.create(querystring); > > QueryExecution qe = QueryExecutionFactory.create(query, m); > > ResultSet results = qe.execSelect(); > > ResultSetFormatter.out(System.out, results, query); > > qe.close(); > } > } > > The following error displays in Eclipse > ___________________________________ > > Exception in thread "main" com.hp.hpl.jena.query.QueryParseException: > Encountered " "<" "< "" at line 1, column 11. > Was expecting: > <IRIref> ... > > at > com.hp.hpl.jena.sparql.lang.ParserSPARQL11.perform(ParserSPARQL11.java:102) > at com.hp.hpl.jena.sparql.lang.ParserSPARQL11.parse$(ParserSPARQL11.java:53) > at com.hp.hpl.jena.sparql.lang.SPARQLParser.parse(SPARQLParser.java:34) > at com.hp.hpl.jena.query.QueryFactory.parse(QueryFactory.java:148) > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:80) > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:53) > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:41) > at familytree.famtree.main(famtree.java:37)
