Thank you Dave for such a detailed reply. Actually you got my problem, but I have taken BestCategory as data property and the problem which bothered me is I want the user BestCategory as a data or object property. The main idea behind this is I want the value of this property for further processing. For instance, I want if BestCategory==Physics Then do something.
Should I take BestCategory as Object property? Do you suggest it.? Kind regards On Sat, Jan 14, 2017 at 9:08 PM, Dave Reynolds <[email protected]> wrote: > Hi Sidra, > > You have tried to explain your problem but the example is not minimal (it > has elements in that aren't used) and isn't complete (no data, no minimal > ontology, code doesn't generate any output or test any assertions) and it's > not clear what your problem is. > > I'm not clear what you mean by "property not in the data property > assertion but in the Annotations". I assume are referring to the Protege UI > which in turn suggests that your ontology doesn't match your example code. > If that's the case then you just need to fix your ontology - nothing to do > with jena or jena rules or this list. > > In the interests of trying to explain for you and Neha what's needed then > here's your code with some of the unnecessary bits removed and some output > code added. I've also changed the name > #BestCategory#Physics to #BestCategory_Physics because having a # > character in your local name is really confusing. But I've not fixed any of > the other style issues with the code or ontology names. > > >>> > OntModel model > = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); > InputStream in = FileManager.get().open("data/test-ont.ttl"); > model.read(in, "", "Turtle"); > String ns="http://www.semanticweb.org/t/ontologies/2016/7/myOWL#";; > OntProperty bestcat=model.getOntProperty(ns+ "BestCategory"); > > //Then rule > String rule ="[rule1: ( ?x http://www.semanticweb.org/t/o > ntologies/2016/7/myOWL#Physics_Preferred_Category ?cat1 )" + > "( ?x http://www.semanticweb.org/t/ontologies/2016/7/myOWL#Chem_Pr > eferred_Category ?cat2 )" + > "greaterThan(?cat1,?cat2)" + > " -> (?x http://www.semanticweb.org/t/o > ntologies/2016/7/myOWL#BestCategory http://www.semanticweb.org/t/o > ntologies/2016/7/myOWL#BestCategory_Physics )]"; > > Reasoner reasoner2 = new GenericRuleReasoner(Rule.parseRules(rule)); > InfModel infModel = ModelFactory.createInfModel(reasoner2, model); > for (StmtIterator i = infModel.listStatements(null,bestcat,(RDFNode)null); > i.hasNext();) { > Statement s = i.next(); > System.out.println( String.format("%s has best category %s", > s.getSubject().getLocalName(), > s.getObject().asResource().getLocalName()) ); > } > infModel.write(System.out, "Turtle"); > <<< > > Now to run this we need an ontology but we only need to include those > declarations used in the sample code (stripping out the bits your don't > need is part of creating a minimal example). We also need test data to > trigger the rule but for a minimal example, that might as well go in the > ontology. So an example minimal "test-ont.ttl" file might be: > > >>> > @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . > @prefix owl: <http://www.w3.org/2002/07/owl#> . > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > @prefix ex: <http://www.semanticweb.org/t/ontologies/2016/7/myOWL#> . > > ex:User a owl:Class . > ex:BestCategory a owl:ObjectProperty . > > ex:Category a owl:Class . > ex:BestCategory_Physics a ex:Category . > > ex:Physics_Preferred_Category a owl:DatatypeProperty . > ex:Chem_Preferred_Category a owl:DatatypeProperty . > > ex:fred a ex:User; > ex:Physics_Preferred_Category 3 ;minimal > ex:Chem_Preferred_Category 1 . > <<< > > That breaks lots of OWL naming conventions but at least it matches your > code. > > If we run the sample code now then we see that rule fires correctly and > outputs: > > fred has best category BestCategory_Physics > > and that the resulting complete model is displayed as > > >>> > @prefix ex: <http://www.semanticweb.org/t/ontologies/2016/7/myOWL#> . > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > @prefix owl: <http://www.w3.org/2002/07/owl#> . > @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > > ex:fred a ex:User ; > ex:BestCategory ex:BestCategory_Physics ; > ex:Chem_Preferred_Category 1 ; > ex:Physics_Preferred_Category 3 . > > ex:BestCategory a owl:ObjectProperty . > > ex:BestCategory_Physics > a ex:Category . > > ex:Chem_Preferred_Category > a owl:DatatypeProperty . > > ex:User a owl:Class . > > ex:Physics_Preferred_Category > a owl:DatatypeProperty . > > ex:Category a owl:Class . > >>> > > That looks correct (or at least looks like it does what you say you are > trying to do). If I load that into protege then I can see the individual > fred and the ex:BestCategory property is shown as being a property > assertion not an axiom. > > So on the face of it there is nothing wrong. > > Now if that's not enough to help you solve your problem then create a > similarly complete minimal example which does show your problem. I expect > your ontology will be a lot different from my example. However, for the > sake of debugging your rule most of it won't be relevant so you should be > able to cut it down to something of comparable size to the above, in which > case it is then possible to post it inline in an email message for people > to look at. If you do this please make sure it really is minimal and > complete. Also for preference use Turtle (not RDF/XML) syntax because that > is so much easier to read and more compact. > > Dave > > > On 14/01/17 16:07, Sidra shah wrote: > >> Hello All, I have a problem, very same to Neha. I was waiting some answer >> will come and I will get help but I think it did not solve. >> I have quiz game for three categories(subjects) Physics, Chemistry and >> Geography. User have to select one category and questions of that category >> will come. When user select a category Physics, for instance, 1 will be >> saved in a property Physics_Preferred_Category. When user select second >> time Physics when login to the system, 2 will be saved. >> I have designed a rule, shown below, to see which category user has >> selected most of the time and will consider that BestCategory for that >> user. The problem which I have currently is it saved the BestCategory >> property not in the data property assertion but in the Annotations. >> >> I have tried to include possible code but not ontology. If it is allowed I >> will paste the screen shot of my properties. >> >> >> OntModel model=ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); >> InputStream in =FileManager.get().open("F://final.owl"); >> if (in==null) { >> throw new IllegalArgumentException( "File: " + " not >> found"); >> } model.read(in,""); >> String ns="http://www.semanticweb.org >> /t/ontologies/2016/7/myOWL#"; >> OntClass dil = model.getOntClass(ns + "DiligentUser"); >> OntClass avgr = model.getOntClass(ns + "AverageUser"); >> OntProperty bestcat=model.getOntProperty(ns+ "BestCategory"); >> Individual indiv = user1.createIndividual(ns + name); //name comes from a >> text field >> //Then rule >> >> String rule ="[rule1: ( ?x http://www.semanticweb.org/t/ >> ontologies/2016/7/myOWL#Physics_Preferred_Category ?cat1 )" + >> "( ?x http://www.semanticweb.org/t/ontologies/2016/7/myOWL#Chem_ >> Preferred_Category ?cat2 )" + >> // "( ?x http://www.semanticweb.org/t/o >> ntologies/2016/7/myOWL#Geo_ >> Preferred_Category ?cat3 )" + >> // "greaterThan(?cat1,?cat2), greaterThan(?cat1,?cat3)" >> + " -> (?x http://www.semanticweb.org/t/o >> ntologies/2016/7/myOWL# >> BestCategory http://www.semanticweb.org/t/ontologies/2016/7/myOWL# >> BestCategory#Physics )]"; >> >> //in ?cat1, ?cat2 ?cat3 there will be numbers like 1 2 3 >> >> Reasoner reasoner2 = new GenericRuleReasoner(Rule.parseRules(rule)); >> InfModel infModel = ModelFactory.createInfModel(reasoner2, >> model); >> >> infModel.listStatements(null,bestcat,(RDFNode)null); >> } >> >> >
