Hi Dave, thanks for your response.
I tried using RDFS_MEM. It gave me the classes, but I got the following error for printing the properties: Exception in thread "main" org.apache.jena.ontology.ProfileException: Attempted to use language construct OBJECT_PROPERTY that is not supported in the current language profile: RDFS I am not sure I understand about this: "However, for interpreting all the DAML specific things like daml:Restriction you will have to work at the RDF level and do this yourself." What does working at the RDF level mean? (I am sorry, still new in this topic) If DAML support is deprecated, does it mean that I cannot enrich the GEDCOM ontology, and use it to do inference on a RDF file? Regards, Arif On Thu, Dec 10, 2015 at 9:55 AM, Dave Reynolds <[email protected]> wrote: > Jena's DAML support was deprecated and then removed some time ago I think. > > For just finding the classes you could use an RDFS_MEM model since DAML is > using rdfs:Class to declare classes (and not owl:Class). > > However, for interpreting all the DAML specific things like > daml:Restriction you will have to work at the RDF level and do this > yourself. > > Dave > > > > On 09/12/15 20:12, M. Arif Wicaksana wrote: > >> Hi all, >> >> I have a project to use GEDCOM ontology ( >> http://www.daml.org/2001/01/gedcom/gedcom), enrich it with additional >> classes and properties, and do some inferences against an RDF file based >> on >> the enriched GEDCOM ontology. >> >> Currently, I want to print all classes and properties from that ontology >> (just to see if Jena can read it properly) using the code I put in the end >> of this message. I download the ontology as 'gedcom-ori.xml'. However, the >> code returns nothing. >> >> I have tried this code for another ontology which uses OWL. And it works >> properly (prints all classes and properties). But I have no idea why it >> does not work for GEDCOM ontology above. I suspect the problem is because >> the ontology uses DAML. I tried my best to find in the documentation of >> Jena about how to read DAML, but I can't find it. >> >> My question is, how can my code print all classes and properties from the >> GEDCOM ontology? what is the correct way to read DAML-based ontology using >> Jena? >> >> It is very likely that I misunderstand this problem, since I am still new >> in this field. If that is the case, would you mind to show me my mistake? >> >> Thanks! >> >> >> Regards, >> Arif >> >> >> ============= >> code: >> >> OntModel m = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM); >> OntDocumentManager dm = m.getDocumentManager(); >> dm.addAltEntry("http://www.daml.org/2001/01/gedcom/gedcom";, >> "file:/home/arif/workspace/RoyalInference/gedcom-ori.xml"); >> >> m.read("http://www.daml.org/2001/01/gedcom/gedcom";); >> >> if(m.isEmpty()) { >> System.out.println("is empty"); >> } else { >> System.out.println("not empty"); >> } >> >> ExtendedIterator allProperties = m.listAllOntProperties(); >> while(allProperties.hasNext()) { >> System.out.println("datatypeproperties: " + >> allProperties.next().toString()); >> } >> >> >> ExtendedIterator classes = m.listClasses(); >> >> while(classes.hasNext()) { >> OntClass thisClass= (OntClass) classes.next(); >> System.out.println("found class: " + thisClass.toString()); >> >> ExtendedIterator instances = thisClass.listInstances(); >> >> while(instances.hasNext()) { >> Individual thisInstance = (Individual) instances.next(); >> System.out.println("found instance: " + >> thisInstance.toString()); >> } >> } >> ====================================== >> >>
