load ontology from ontology document using OWL API

Question

I downloaded OWL API maven project and opened OWL API Default Implementation. I just want to load an ontology but it gives me an error.

public static final IRI example_iri2 = IRI.create("http://mged.sourceforge.net/ontologies/MGEDOntology.owl");

public static void main(String[] arg) throws OWLOntologyCreationException {
    OWLDataFactoryImpl factoryImpl = new OWLDataFactoryImpl();
    ReadWriteLock readWriteLock = new NoOpReadWriteLock();
    OWLOntologyManagerImpl managerImpl = new OWLOntologyManagerImpl(factoryImpl, readWriteLock);
    OWLOntology ontology = managerImpl.loadOntology(example_iri2);
}

The output is:

        SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
    SLF4J: Defaulting to no-operation (NOP) logger implementation
    SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
    Exception in thread "main" org.semanticweb.owlapi.model.OWLOntologyFactoryNotFoundException: Could not find an appropriate factory to load ontology from ontology document: <http://mged.sourceforge.net/ontologies/MGEDOntology.owl>
        at uk.ac.manchester.cs.owl.owlapi.OWLOntologyManagerImpl.loadOntology(OWLOntologyManagerImpl.java:1048)
        at uk.ac.manchester.cs.owl.owlapi.OWLOntologyManagerImpl.loadOntology(OWLOntologyManagerImpl.java:935)
        at uk.ac.manchester.cs.owl.owlapi.OWLOntologyManagerImpl.loadOntology(OWLOntologyManagerImpl.java:891)
        at com.main.main.main(main.java:33)
    ------------------------------------------------------------------------
    BUILD FAILURE

How can I fix this? I tried this and it's not working.

File file = new File("pizza3.owl");
OWLOntology ontology = managerImpl.loadOntologyFromOntologyDocument(file);

What means downloaded? It's a Maven project, thus, it's recommended to use it via a Maven dependency. The ontology looks ok, so I guess you're missing some libraries. If you don't use Maven, you have to add all OWL API Jar files to your class path. — UninformedUser
And I suggest you to follow the OWL API examples: An OWLOntologyManager will be created via OWLOntologyManager manager = OWLManager.createOWLOntologyManager(); — UninformedUser
What do you mean by import? You do you write your Java code? An IDE usually has autocompletion/import. — UninformedUser
Could you solve the issue? If yes, please provide an answer and accept it. That's how Stackoverflow is supposed to work. — UninformedUser

Ignazio Ignazio · Accepted Answer · 2016-08-15T11:08:53

The manager you created needs setup.

The recommended way is through OWLManager, in the apibinding module.

The recommended dependencies to use are the distribution or osgidistribution modules.

load ontology from ontology document using OWL API

1 Answers