Hi Dave, sorry for my late reply. Thanks for your answer. I didn't know that DAML interface is not supported anymore. Maybe that is why I can't find any information about DAML in Jena documentation. I decided to just rewrite the ontology using OWL specification. Much much easier to do the rest of my project.
On Thu, Dec 10, 2015 at 10:40 AM, Dave Reynolds <[email protected]> wrote: > Hi Arif, > > > On 10/12/15 09:19, M. Arif Wicaksana wrote: > >> 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 >> > > That's because RDFS doesn't have a notion of DatatypeProperty or > ObjectProperty, just Property. > > DAML has it's own thing so ... > > 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) >> > > Well, for example. To list the DAML object properties you could do: > > final String DAML_NS = "http://www.daml.org/2001/03/daml+oil#";; > OntModel model = > ModelFactory.createOntologyModel(OntModelSpec.RDFS_MEM); > model.read("http://www.daml.org/2001/01/gedcom/gedcom";); > > Property damlObjectProperty = model.createProperty(DAML_NS, > "ObjectProperty"); > ResIterator i = model.listSubjectsWithProperty(RDF.type, > damlObjectProperty); > while (i.hasNext()) { > System.out.println(" - " + i.next()); > } > > which outputs: > > - http://www.daml.org/2001/01/gedcom/gedcom#childIn > - http://www.daml.org/2001/01/gedcom/gedcom#birth > - http://www.daml.org/2001/01/gedcom/gedcom#spouseIn > - http://www.daml.org/2001/01/gedcom/gedcom#eventProperty > - http://www.daml.org/2001/01/gedcom/gedcom#individualEventProperty > - http://www.daml.org/2001/01/gedcom/gedcom#marriage > - http://www.daml.org/2001/01/gedcom/gedcom#divorce > - http://www.daml.org/2001/01/gedcom/gedcom#death > - http://www.daml.org/2001/01/gedcom/gedcom#familyEventProperty > > So you are working at the level of the RDF API - searching individual > triples and triple patterns. > > 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? >> > > You can add more statements using Jena by adding the corresponding RDF > triples but Jena doesn't support DAML inference. > > Dave >
