Tutorial :How to add OWL:imports to a .owl file by jena



Question:

I am new to Jena. I want to create a new OntModel and need to imports some other ontology to this model.If I write it to file, I expect the file can show something like follow:

  <owl:Ontology rdf:about="">      <owl:imports rdf:resource="http://test.owl#"/>    </owl:Ontology>  

Right now, I dont know how to import other ontology to the model by jena. Can any one give me some advices?

Thank you


Solution:1

See jena's Ontology API (which sits over the RDF api) and in particular the imports section.

To make something like you want, try:

String base = "http://www.example.com/ont";  OntModel model = ModelFactory.createOntologyModel();  Ontology ont = model.createOntology("");  ont.addImport(model.createResource("http://test.owl#"));  model.write(System.out, "RDF/XML-ABBREV", base);  

Result:

<rdf:RDF      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"      xmlns:owl="http://www.w3.org/2002/07/owl#"      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"      xml:base="http://www.example.com/ont">    <owl:Ontology rdf:about="">      <owl:imports rdf:resource="http://test.owl#"/>    </owl:Ontology>  </rdf:RDF>  

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