Re: Getting all classes and properties from DAML-based ontology

[Dave Reynolds]

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());
         }
     }
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