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No output for rule in Jena using generic rule reasoner

由 [亡魂溺海] 提交于 2019-12-12 02:56:09

问题


I created an ontology in Protege and imported that ontology in Eclipse using Jena. I have written rules in rule file and want the output of the rules to be displayed in Jena but its not showing output. Program is getting executed without errors. The details of ontology are

Thing
Children

  • 0-12Months
  • 1-3Years
  • 4-7Years
  • 7-12Years

Toys

  • Bikes
  • Building_Blocks
  • Dolls
  • Skates
  • Stuffed_toys

Added one datatype property playWith domain children and range Toys whose inverse is playedBy Added four inviduals

  • Jhon instance of 0-12Months
  • mary instance of 1-3Years
  • sam instance of 4-7Years
  • smith instance of 7-12Years
    • teddy instance of Stuffed_toy written a rule as for assigning an instance of 0-12Months class using property playWith as an instance of stuffed_toys teddy
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
@prefix df: <http://www.semanticweb.org/ontologies/2014/9/9/child#>
[rule1: (?x rdf:type df:0-12Months)  -> (?x df:playWith ?Stuffed_toys)]
[rule21: (?x df:playWith ?Stuffed_toys) -> print(?x ,'Plays with teddy')]

The code is;

public class GetStartedSemWeb
{
    static String defaultNameSpace="http://semanticweb.org/ontologies#";
    static OntModel schema = null;
    OntModel infmodel =null;

    public static void main(String[] args) throws IOException
    {
        GetStartedSemWeb getsemweb = new GetStartedSemWeb();
        System.out.println(" Adding  toy ontology ");
        getsemweb.loadontology();
    }

    private void loadontology() throws IOException
    {
        schema = ModelFactory.createOntologyModel();
        java.io.InputStream inschema =FileManager.get().open("C:/Users/Desktop/Documents/PERSONALIZATION_CHILDREN/child.owl");
        schema.read(inschema,defaultNameSpace);
        schema.write(System.out, "RDF/XML");
        String rulefile="C:/Users/Desktop/Documents/PERSONALIZATION_CHILDREN/rule1.txt";
        java.util.List rules1 = Rule.rulesFromURL(rulefile);
        System.out.println(rules1);
        Reasoner reasoner = new GenericRuleReasoner(rules1);
        reasoner = reasoner.bindSchema(schema);
        InfModel infmodel = ModelFactory.createInfModel(reasoner,schema);
        Resource children = infmodel.getResource("http://semanticweb.org/ontologies/2014/9/9/child.owl/Children#");
        System.out.println(children);
        printStatements(infmodel,children,null ,null);
    }

    private static void printStatements(InfModelinfmodel,Resource s, Property p1, Resource o1)
    {
        System.out.println("Children");
        for(StmtIterator i = infmodel.listStatements(s,p1,o1);i.hasNext();)
        {
            System.out.println("Children");
            Statement stmt = i.nextStatement();
            System.out.println(" - "+PrintUtil.print(stmt));
        }
    }
}

RDF/xml CODE IS

     df:RDF xml:base="http://www.semanticweb.org/ontologies/2014/9/9/child.owl"><owl:Ontology               

     rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl"/><!-- 
          ///////////////////////////////////////////////////////////////////////////////////////
      //
       // Object Properties
      //


     ///////////////////////////////////////////////////////////////////////////////////////
           --><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#PlayedBy -->                                   
              <owl:ObjectProperty           


              rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#PlayedBy"> 

           <rdfs:range                            

               rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children"/>  

       <rdfs:domain rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/>        
           </owl:ObjectProperty><!--                     
          http://www.semanticweb.org/ontologies/2014/9/9/child.owl#playWith --> 

          <owl:ObjectProperty 
           rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#playWith">

        <rdfs:domain 

              rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children"/>           

             <owl:inverseOf     

   rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#PlayedBy"/><rdfs:range 

     rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/> 

     </owl:ObjectProperty><!-- 
///////////////////////////////////////////////////////////////////////////////////////
//
// Classes
//
///////////////////////////////////////////////////////////////////////////////////////

   --><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#0-12Months --><owl:Class              


       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#0-12Months">



   <owl:Class rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#1-3Years">      

<rdfs:subClassOf 

  rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children"/></owl:Class> 

     <!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#4-7Years --><owl:Class 

   rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#4-7Years"><rdfs:subClassOf 

    rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children"/>

 </owl:Class><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#7-12Years -->  

   <owl:Class rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#7-12Years">

 <rdfs:subClassOf   

   rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children"/></owl:Class>

       <!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Bikes --><owl:Class 

         rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Bikes">

      <rdfs:subClassOf 

      rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/></owl:Class>

      <!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Building_Blocks --><owl:Class 

       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Building_Blocks">

       <rdfs:subClassOf 

        rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/></owl:Class>

       <!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children --><owl:Class 

       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Children">

       <rdfs:subClassOf rdf:resource="http://www.w3.org/2002/07/owl#Thing"/><owl:disjointWith 

         rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/>

    </owl:Class><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Doll --><owl:Class 

  rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Doll"><rdfs:subClassOf 

      rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/></owl:Class>

      <!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Skates --><owl:Class 

       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Skates">

      <rdfs:subClassOf 

   rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/></owl:Class><!-- 

    http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Stuffed_toys --><owl:Class 

   rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Stuffed_toys">

   <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"/>

    </owl:Class><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy --><owl:Class 

       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Toy"><rdfs:subClassOf 

      rdf:resource="http://www.w3.org/2002/07/owl#Thing"/></owl:Class><!-- 
///////////////////////////////////////////////////////////////////////////////////////
//
// Individuals
//
///////////////////////////////////////////////////////////////////////////////////////
 --><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#John --><owl:NamedIndividual 

    rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#John"><rdf:type 

        rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#0-12Months"/>

         </owl:NamedIndividual><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#mary 

--><owl:NamedIndividual 

      rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#mary"><rdf:type 

           rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#1-3Years"/>

     </owl:NamedIndividual><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#sam -->

   <owl:NamedIndividual rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#sam">

  <rdf:type rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#4-7Years"/>

 </owl:NamedIndividual><!-- http://www.semanticweb.org/ontologies/2014/9/9/child.owl#smith -->

  <owl:NamedIndividual 

  rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#smith"><rdf:type 

  rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#7-12Years"/>

    </owl:NamedIndividual><!-- 

  --><owl:NamedIndividual 

     rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#teddy"><rdf:type 

      rdf:resource="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Stuffed_toys"/>

          </owl:NamedIndividual>
///////////////////////////////////////////////////////////////////////////////////////
//
// General axioms
//
///////////////////////////////////////////////////////////////////////////////////////
 --><rdf:Description><rdf:type rdf:resource="http://www.w3.org/2002/07/owl#AllDifferent"/>               

      <owl:distinctMembers rdf:parseType="Collection"><rdf:Description 

     rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#John"/><rdf:Description 

    rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#mary"/><rdf:Description 

    rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#sam"/><rdf:Description 

     rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#smith"/>

    </owl:distinctMembers></rdf:Description><rdf:Description><rdf:type 

     rdf:resource="http://www.w3.org/2002/07/owl#AllDisjointClasses"/><owl:members 

       rdf:parseType="Collection"><rdf:Description 

      rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Bikes"/>

        <rdf:Description

       rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Building_Blocks"/>

      <rdf:Description 

      rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Doll"/><rdf:Description 

         rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Skates"/>

        <rdf:Description 

          rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#Stuffed_toys"/>

         </owl:members></rdf:Description><rdf:Description><rdf:type 

       rdf:resource="http://www.w3.org/2002/07/owl#AllDisjointClasses"/><owl:members 

             rdf:parseType="Collection"><rdf:Description 

           rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#0-12Months"/>

          <rdf:Description rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#1-                         

             3Years"/><rdf:Description 

         rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#4-7Years"/>

             <rdf:Description 

           rdf:about="http://www.semanticweb.org/ontologies/2014/9/9/child.owl#7-12Years"/>

                </owl:members>      </rdf:Description></rdf:RDF>

I want the output for the rule execution, and the all statements of children class to be printed its not happening please help me to find the solution i am struggling since many days.

thanks a lot for spending time on my question Sorry for not putting the question in proper format. i have updated please let me know the error i want to use the child ontology and do personalization for predicting the toys liked by children based on their age group by devising set of rule using a reasoner please help me to find the solution .

来源：https://stackoverflow.com/questions/26292160/no-output-for-rule-in-jena-using-generic-rule-reasoner

标签
java
rdf
jena
owl
jena-rules
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