Use SWRL and get 'Error creating query engine Drools'.

[mary]

This is my function to create ontology used OWL-API:

OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
        IRI ontologyIRI = IRI.create("http://hh/", "");
        OWLOntology ontology = manager.createOntology(ontologyIRI);
        OWLDataFactory factory = manager.getOWLDataFactory();
        PrefixManager pm = new DefaultPrefixManager(null, null, ontologyIRI.toString());
        OWLClass sr = factory.getOWLClass(":SR", pm);                                           //create class SR
        OWLClass ob = factory.getOWLClass(":Object", pm);                                   //create class Object
        OWLNamedIndividual vold = factory.getOWLNamedIndividual(":vold", pm); //create individual vold
        OWLNamedIndividual sr1 = factory.getOWLNamedIndividual(":sr1", pm);  //create individual sr1
        OWLObjectProperty hasObject = factory.getOWLObjectProperty(":hasObject", pm);
        OWLObjectPropertyAssertionAxiom propertyAssertion = factory
                .getOWLObjectPropertyAssertionAxiom(hasObject, sr1, vold);                  //create property hasObject         
       ...
        OWLClassAssertionAxiom classAssertion = factory.getOWLClassAssertionAxiom(ob, vold);
        OWLClassAssertionAxiom classAssertion1 = factory.getOWLClassAssertionAxiom(sr, sr1);
        ...
        manager.saveOntology(ontology,
                                IRI.create((new File("D:\\owl_example\\8.owl").toURI())));

This is my owl file which created by code .
<?xml version="1.0"?>
<rdf:RDF xmlns="http://hh/"
     xml:base="http://hh/"
     xmlns:hh="http://hh/"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
    <owl:Ontology rdf:about="http://hh/"/>
....

    <owl:ObjectProperty rdf:about="http://hh/hasObject"/>
...

<owl:NamedIndividual rdf:about="http://hh/sr1">
        <rdf:type rdf:resource="http://hh/SR"/>
        <hasObject rdf:resource="http://hh/vold"/>
    </owl:NamedIndividual>

   <owl:NamedIndividual rdf:about="http://hh/vold">
        <rdf:type rdf:resource="http://hh/Object"/>
    </owl:NamedIndividual>
</rdf:RDF>

This is my SWRL code:

try {
                 OWLOntologyManager ontologyManager = OWLManager.createOWLOntologyManager();
                 OWLOntology ontology = ontologyManager.loadOntologyFromOntologyDocument(file);
                 
                 SQWRLQueryEngine queryEngine = SWRLAPIFactory.createSQWRLQueryEngine(ontology);
                 SQWRLResult result = queryEngine.runSQWRLQuery("q1",
                                 "SR(?s)^hasObject(?s,vold) -> sqwrl:select(?s)");

                 if (result.next())
                         System.out.println("Name: " + result.getLiteral("x"));
                         }
        catch (OWLOntologyCreationException e) {....}

I got the error as follows:
Error starting application: Error creating query engine Drools. Exception: java.lang.NoSuchMethodError. Message: org.semanticweb.owlapi.model.OWLDocumentFormat.isPrefixOWLOntologyFormat()Z

Please help me. Thanks advance.

[Martin O'Connor-2]

Which versions of the OWLAPI and SWRLAPI are you using?

There is a minimal example SWRLAPI application here that contains a POM defining the latest dependencies:

https://github.com/protegeproject/swrlapi-example

Martin

On May 21, 2017, at 7:47 PM, mary <[hidden email]> wrote:

This is my function to create ontology used OWL-API:

OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
       IRI ontologyIRI = IRI.create("http://hh/", "");
       OWLOntology ontology = manager.createOntology(ontologyIRI);
       OWLDataFactory factory = manager.getOWLDataFactory();
       PrefixManager pm = new DefaultPrefixManager(null, null,
ontologyIRI.toString());
       OWLClass sr = factory.getOWLClass(":SR", pm);                                          
//create class *SR*
       OWLClass ob = factory.getOWLClass(":Object", pm);                                  
//create class *Object*
       OWLNamedIndividual vold = factory.getOWLNamedIndividual(":vold",
pm); //create individual *vold*
       OWLNamedIndividual sr1 = factory.getOWLNamedIndividual(":sr1", pm);
//create individual *sr1*
       OWLObjectProperty hasObject =
factory.getOWLObjectProperty(":hasObject", pm);
       OWLObjectPropertyAssertionAxiom propertyAssertion = factory
               .getOWLObjectPropertyAssertionAxiom(hasObject, sr1, vold);                 
//create property *hasObject*          
      ...
       OWLClassAssertionAxiom classAssertion =
factory.getOWLClassAssertionAxiom(ob, vold);
       OWLClassAssertionAxiom classAssertion1 =
factory.getOWLClassAssertionAxiom(sr, sr1);
       ...
       manager.saveOntology(ontology,
IRI.create((new File("D:\\owl_example\\8.owl").toURI())));

This is my owl file which created by code .
<?xml version="1.0"?>
<rdf:RDF xmlns="http://hh/"
    xml:base="http://hh/"
    xmlns:hh="http://hh/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:xml="http://www.w3.org/XML/1998/namespace"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
   <owl:Ontology rdf:about="http://hh/"/>
....

   <owl:ObjectProperty rdf:about="http://hh/hasObject"/>
...

<owl:NamedIndividual rdf:about="http://hh/sr1">
       <rdf:type rdf:resource="http://hh/SR"/>
       <hasObject rdf:resource="http://hh/vold"/>
   </owl:NamedIndividual>

  <owl:NamedIndividual rdf:about="http://hh/vold">
       <rdf:type rdf:resource="http://hh/Object"/>
   </owl:NamedIndividual>
</rdf:RDF>

This is my SWRL code:

try {
OWLOntologyManager ontologyManager =
OWLManager.createOWLOntologyManager();
OWLOntology ontology =
ontologyManager.loadOntologyFromOntologyDocument(file);

SQWRLQueryEngine queryEngine =
SWRLAPIFactory.createSQWRLQueryEngine(ontology);
SQWRLResult result = queryEngine.runSQWRLQuery("q1",
"SR(?s)^hasObject(?s,vold) -> sqwrl:select(?s)");

if (result.next())
System.out.println("Name: " + result.getLiteral("x"));
}
catch (OWLOntologyCreationException e) {....}

I got the error as follows:
Error starting application: Error creating query engine Drools. Exception:
java.lang.NoSuchMethodError. Message:
org.semanticweb.owlapi.model.OWLDocumentFormat.isPrefixOWLOntologyFormat()Z

Please help me. Thanks advance.




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[Lorenz Buehmann]

You used the SWRL API several times before and now you're getting this error?! What have you changed this time?

As always:

NoSuchMethodError -> different versions of the libraries, here the OWL API, i.e. the version of the SWRL API that you use depends on a different version that you use in your application code-> use Maven for dependency management

This is my function to create ontology used OWL-API:

OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
        IRI ontologyIRI = IRI.create("http://hh/", "");
        OWLOntology ontology = manager.createOntology(ontologyIRI);
        OWLDataFactory factory = manager.getOWLDataFactory();
        PrefixManager pm = new DefaultPrefixManager(null, null,
ontologyIRI.toString());
        OWLClass sr = factory.getOWLClass(":SR", pm);                                          
//create class *SR*
        OWLClass ob = factory.getOWLClass(":Object", pm);                                  
//create class *Object*
        OWLNamedIndividual vold = factory.getOWLNamedIndividual(":vold",
pm); //create individual *vold*
        OWLNamedIndividual sr1 = factory.getOWLNamedIndividual(":sr1", pm); 
//create individual *sr1*
        OWLObjectProperty hasObject =
factory.getOWLObjectProperty(":hasObject", pm);
        OWLObjectPropertyAssertionAxiom propertyAssertion = factory
                .getOWLObjectPropertyAssertionAxiom(hasObject, sr1, vold);                 
//create property *hasObject*          
       ...
        OWLClassAssertionAxiom classAssertion =
factory.getOWLClassAssertionAxiom(ob, vold);
        OWLClassAssertionAxiom classAssertion1 =
factory.getOWLClassAssertionAxiom(sr, sr1);
        ...
        manager.saveOntology(ontology,
				IRI.create((new File("D:\\owl_example\\8.owl").toURI())));

This is my owl file which created by code .
<?xml version="1.0"?>
<rdf:RDF xmlns="http://hh/"
     xml:base="http://hh/"
     xmlns:hh="http://hh/"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
    <owl:Ontology rdf:about="http://hh/"/>
....

    <owl:ObjectProperty rdf:about="http://hh/hasObject"/>
...

<owl:NamedIndividual rdf:about="http://hh/sr1">
        <rdf:type rdf:resource="http://hh/SR"/>
        <hasObject rdf:resource="http://hh/vold"/>
    </owl:NamedIndividual>

   <owl:NamedIndividual rdf:about="http://hh/vold">
        <rdf:type rdf:resource="http://hh/Object"/>
    </owl:NamedIndividual>
</rdf:RDF>

This is my SWRL code:

try {
		 OWLOntologyManager ontologyManager =
OWLManager.createOWLOntologyManager();
		 OWLOntology ontology =
ontologyManager.loadOntologyFromOntologyDocument(file);
		 
		 SQWRLQueryEngine queryEngine =
SWRLAPIFactory.createSQWRLQueryEngine(ontology);
		 SQWRLResult result = queryEngine.runSQWRLQuery("q1", 
				 "SR(?s)^hasObject(?s,vold) -> sqwrl:select(?s)");

		 if (result.next()) 
			 System.out.println("Name: " + result.getLiteral("x"));
			 }
	catch (OWLOntologyCreationException e) {....}

I got the error as follows:
Error starting application: Error creating query engine Drools. Exception:
java.lang.NoSuchMethodError. Message:
org.semanticweb.owlapi.model.OWLDocumentFormat.isPrefixOWLOntologyFormat()Z

Please help me. Thanks advance.




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[mary]

I use jdk 1.8  OWL-API 5.1 and SWRLapi-1.07.
I download the swrl project and use mvn build it.
I also unzip jar swrltab-plugin-1.0.7，swrltab-2.0.0-jar-with-dependencies，swrlapi-example-2.0.0-jar-with-dependencies. And add jar under /lib.

[Lorenz Buehmann]

I don't understand why you need the Jars from the SWRL Tab plugin. You only need SWRL API + OWL API.

I use jdk 1.8  OWL-API 5.1 and SWRLapi-1.07.
I download the swrl project and use mvn build it.
I also unzip jar
swrltab-plugin-1.0.7，swrltab-2.0.0-jar-with-dependencies，swrlapi-example-2.0.0-jar-with-dependencies.
And add jar under /lib.
<http://protege-project.136.n4.nabble.com/file/n4668573/swrl-jar.png> 



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[Martin O'Connor-2]

The SWRLAPI uses the 4.2.7 version of the OWLAPI. (FYI, the 5+ version of the OWLAPI is not backwards compatible with the 4.x.x. version; there are no plans to port the SWRLAPI to the 5+ version of the OWLAPI.)

I can’t fully understand your questions below. By ‘exit’ do you mean ‘exist’?

Can you post the ontology?

Martin

> On May 22, 2017, at 1:14 AM, mary <[hidden email]> wrote:
>
> I remove and add all external jar again,and this time got another error.
> SQWRLResult result = queryEngine.runSQWRLQuery("q1",
> "SR(?s)^hasObject(?s,vold) -> sqwrl:select(?s)");
> if the individual  *vold* is not  exit in owl file. There is no error.
>
> Then,changing to another individual which is exit in owl file like /data.
> SQWRLResult result = queryEngine.runSQWRLQuery("q1",
> "SR(?s)^hasObject(?s,/data) -> sqwrl:select(?s)");
> the individual* /data* is exit in owl file, got error as follows:
>
> *Error running SWRL rule or SQWRL query: invalid column name x*
> Please help me.Thanks.
>
>
>
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[Lorenz Buehmann]

Please check spelling next time, it is called "exists"

And then, hasObject is what? an object property I guess? that means the second argument has to be an individual in your ontology. Is there an individual "vold"? And your sure there is an individual "/data"? Why the slash here? Your naming convention is confusing.

I remove and add all external jar again,and this time got another error.
SQWRLResult result = queryEngine.runSQWRLQuery("q1", 
			 "SR(?s)^hasObject(?s,vold) -> sqwrl:select(?s)");
if the individual  *vold* is not  exit in owl file. There is no error.

Then,changing to another individual which is exit in owl file like /data.
SQWRLResult result = queryEngine.runSQWRLQuery("q1", 
			 "SR(?s)^hasObject(?s,/data) -> sqwrl:select(?s)");
the individual* /data* is exit in owl file, got error as follows:

*Error running SWRL rule or SQWRL query: invalid column name x*
Please help me.Thanks.



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