OWL API-如何向OWL文件添加新的类，属性，个人？

Question

I want to add a new class, properties to the OWL file which is created from protege. I need to update the owl file. This is the code that i have tried to add a class. But it doesnot updated the original OWL file. Only the output of netbeans IDE provide the updated OWL file.

 OWLDataFactory df = OWLManager.getOWLDataFactory();

 OWLEntity entity = df.getOWLEntity(EntityType.CLASS, IRI.create("#newclass"));

 OWLAxiom declare = df.getOWLDeclarationAxiom(entity);
 manager.addAxiom(ontology,declare );

Answer 1

You need to create an OWL storer object:

AbstractOWLStorer storer = new FunctionalSyntaxStorer();

Here I am creating a storer that will store the ontology in functional syntax format. You can use a different constructor for different format (XML, etc.).

storer.storeOntology(ontology, new FileDoumentTarget(new File(filePath)), new FunctionalSyntaxDocumentFormat());

For more specific details about the format you want to store the ontology, check the docs online: http://owlcs.github.io/owlapi/apidocs_4_0_2/org/semanticweb/owlapi/util/AbstractOWLStorer.html

Answer 2

You need to actually save the ontology back to the file. Use

manager.saveOntology(ontology);

to achieve that.