It's all RDF. OWL is expressed as RDF. I think perhaps you mean RDFS? If you have an OWL ontology then all of your classes are (at the deepest level) subclasses of owl:Thing. If you have created an RDFS vocabulary then all of your classes are subclasses of rdfs:Class. I'm guessing that you have created an OWL vocabulary if you have saved it with the owl extension.
Rob Rob Walpole Email robkwalp...@gmail.com Tel. +44 (0)7969 869881http://www.linkedin.com/in/robwalpole On Thu, Aug 20, 2015 at 12:50 PM, kumar rohit <kumar.en...@gmail.com> wrote: > Thank you but what about RDF models and classes? Is it replaced by OWL ? > > On Thu, Aug 20, 2015 at 11:52 AM, Rob Walpole <robkwalp...@gmail.com> > wrote: > > > You will need use an OntModel if you want to instantiate your OWL > classes. > > I assume your vocabulary is actually based on OWL, i.e. all your classes > > are subclasses of owl:Thing - so if you want to use these in your Java > code > > - perhaps to write queries - you will need to instantiate them something > > like this: > > > > OntClass MY_OWL_CLASS = MODEL.createClass(MY_VOCAB_URI + "MyClassName"); > > > > Where MODEL is an instance of OntModel create something like this: > > > > OntModel MODEL = > ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); > > > > I believe you can also extract inferred triples from an OntModel but I > > haven't tried this myself. > > > > Rob > > > > Rob Walpole > > Email robkwalp...@gmail.com > > Tel. +44 (0)7969 869881http://www.linkedin.com/in/robwalpole > > > > > > On Thu, Aug 20, 2015 at 8:41 AM, kumar rohit <kumar.en...@gmail.com> > > wrote: > > > > > Suppose a Protege file which is saved as "module.owl" in Rdf/xml > > serialized > > > form and we want to import it in Jena, what classes will we use? I mean > > RDF > > > classes like > > > > > > Model model = ModelFactory.createDefaultModel(); > > > > > > OR Ontmodel classes and methods like > > > > > > OntModel m = ModelFactory.createOntologyModel(); > > > > > > > > > I am confused so kindly explain the situation when to use RDF and when > > > to use OWL classes when working on Protege and Jena. > > > > > >