Jena and Pellet search on label returns error

Question

I've been at this for a few hours now, trying to get Pellet to work with Jenna. Now I finally got to the point it was working. Querying classes and inferenced classes is going well. For example:

SELECT * WHERE { ?x rdf:type uni:Adult}

However when trying to query for a label using this:

SELECT * WHERE { ?x ?y "Vincent"^^xsd:string}

returns:

 org.mindswap.pellet.jena.PelletReasoner@1b13b5d
PREFIX  xsd:  <http://www.w3.org/2001/XMLSchema#>
PREFIX  uni:  <http://localhost/SemanticSearch/semanticsearch.owl#>
PREFIX  rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX  rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX  owl:  <http://www.w3.org/2002/07/owl#>

SELECT  *
WHERE
  { ?x ?y "Vincent"^^xsd:string }

    {
      "head": {
        "vars": [ "x" , "y" ]
      } ,
      "results": {
        "bindings": [
    mrt 18, 2015 1:06:41 PM org.mindswap.pellet.jena.graph.loader.DefaultGraphLoader addUnsupportedFeature
    WARNING: Unsupported axiom: Ignoring range axiom for AnnotationProperty http://www.w3.org/2000/01/rdf-schema#label
    mrt 18, 2015 1:06:41 PM org.mindswap.pellet.jena.graph.loader.DefaultGraphLoader addUnsupportedFeature
    WARNING: Unsupported axiom: Ignoring range axiom for AnnotationProperty http://localhost/SemanticSearch/semanticsearch.owl#altLabel

        ]
      }
    }

My full code is as follows:

            Model rawModel = ModelFactory.createDefaultModel();
            Reasoner r = PelletReasonerFactory.theInstance().create();
            Model data = FileManager.get().loadModel("file:C:/wamp/www/SemanticSearch/workspace/SemanticSearch/src/semanticsearch.owl");

            InfModel model = ModelFactory.createInfModel(r, data);
            InputStream in = new FileInputStream(new File("C:/wamp/www/SemanticSearch/semanticsearch.owl"));

            System.out.println(model.getReasoner()); 


             String sparqlQueryString1= "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>" +
                 "PREFIX owl: <http://www.w3.org/2002/07/owl#>"+
                     " PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>"+
                     " PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>"+
                     " PREFIX uni: <http://localhost/SemanticSearch/semanticsearch.owl#>"+
                     " SELECT * WHERE { ?x ?y \"Vincent\"^^xsd:string}";
                System.out.println(sparqlQueryString1); 


                          Query query = QueryFactory.create(sparqlQueryString1);
                          QueryExecution qexec = QueryExecutionFactory.create(query, model);

                          ResultSet results = qexec.execSelect();
                         //ORGINEEL ResultSetFormatter.out(System.out, results, query);       
                         //ALS RDF ResultSetFormatter.outputAsRDF("", results);    
                          ResultSetFormatter.outputAsJSON(results);
                         qexec.close() ;
        }

Are querying strings not available in Jena? Even not when I'm using Pellet? Is there any other way to query the altlabels of my ontology using Jena and Pellet?

score 0 · Answer 1 · answered Mar 18 '15 at 07:15

0

That warning is only saying that the reasoner is ignoring ranges declared on annotation properties. Your query should not be affected by it.

answered Mar 18 '15 at 07:15

Ignazio

10,504
1
14
25

Yeah that's what I figured, however when I execute the query in Protege or Fuseki server it returns results. Using the exact same query in the java Jena returns 0, while the class query is working – vincent kleine Mar 18 '15 at 11:28

score 0 · Accepted Answer · answered Mar 18 '15 at 13:50

0

Ok, this was kinda stupid. Turned out I accidently exported my ontology using OWL/XML, saving it as RDF/XML fixed this.

answered Mar 18 '15 at 13:50

vincent kleine

724
1
6
22

Jena and Pellet search on label returns error

2 Answers2