Thanks Dave and Lorenz for your time, I finally fixed it. I passed "model" as second orgument to QueryExecutionFactory , which should be InfModel rather..
QueryExecution qe=QueryExecutionFactory.create(query, inf); regards On Wed, Jul 27, 2016 at 2:10 AM, Dave Reynolds <dave.e.reyno...@gmail.com> wrote: > On 27/07/16 09:54, javed khan wrote: > >> Sorry but still not working. >> >> When I query instances of Expert, it shows "Tim" which is fine. When I >> query instance of Student, it shows "Khan", which is also fine. >> Even when I query both in one, it shows "Khan" which is also ok because >> Khan is also Expert and Student, but when I try to assign it(Khan) to >> another class, it does not work. >> > > That's too imprecise to comment on. > > If you can show exactly your data and your rules then we might be able to > spot the problem. > > I am afraid if Jena generic rules does not work on classes and only it >> supports properties like transitive property and inverse property. >> > > Generic rules just work in terms of triples. They can be used on instances > or classes equally well. You just need to be clear on what you rules need > to do and write the patterns accordingly. > > Dave > > > > On Wed, Jul 27, 2016 at 1:39 AM, javed khan <javedbtk...@gmail.com> wrote: >> >> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type> >>> >>> are wrong. Either use the correct URI: >>> >>> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> >>> >>> or use the prefix form: >>> >>> rdf:type >>> >>> >>> I am sorry due to too many threads, I did not read this reply. >>> >>> Thanks Dave, let me try. >>> >>> On Wed, Jul 27, 2016 at 1:35 AM, Dave Reynolds < >>> dave.e.reyno...@gmail.com> >>> wrote: >>> >>> See my earlier reply, you had an error in the URLs in your rules. >>>> >>>> Dave >>>> >>>> >>>> On 27/07/16 09:33, javed khan wrote: >>>> >>>> If my email (code) is not understandable, I am just explaining in plain >>>>> text. >>>>> >>>>> I have class Expert which have some researches i-e "Tim hasResearch >>>>> Ontologies". I have another class Student (subclasses Master Phd). Khan >>>>> is >>>>> instance of Phd class (ultimately of Student class also). Phd student >>>>> can >>>>> also have some researches as Expert class and have type both : Student >>>>> and >>>>> Expert in Protege. >>>>> >>>>> I want instances which are both in Student and Expert i-e Khan in this >>>>> case. >>>>> >>>>> If ?x rdf:type std:Expert and ?x rdf:type std:Student -> ?x rdf:type >>>>> std:StudentExpert (a new class in the ontology). >>>>> >>>>> my query is : select * where { ?x rdf:type std:StudentExpert} >>>>> >>>>> On Wed, Jul 27, 2016 at 1:20 AM, javed khan <javedbtk...@gmail.com> >>>>> wrote: >>>>> >>>>> I am sorry that is just the mistake when I copy code from my IDE to >>>>> >>>>>> email. >>>>>> In the original code, its written just once. >>>>>> >>>>>> On Wed, Jul 27, 2016 at 1:11 AM, Lorenz B. < >>>>>> buehm...@informatik.uni-leipzig.de> wrote: >>>>>> >>>>>> I'm not an expert, but why do you have each URI twice in the rule? >>>>>> >>>>>>> >>>>>>> I have rule body:I want instance x which are in both classes to >>>>>>> assign >>>>>>> >>>>>>>> >>>>>>>> to >>>>>>> >>>>>>> another class "StudentExpert" which have no other instances. But does >>>>>>>> >>>>>>>> not >>>>>>> >>>>>>> work. >>>>>>>> (My Owl inverse property and transitive property rule works but this >>>>>>>> generic rule does not work) >>>>>>>> >>>>>>>> String rule = "*[rule1:(?x >>>>>>>> http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type >>>>>>>> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type> >>>>>>>> http://www.semanticweb.org/141#Student >>>>>>>> <http://www.semanticweb.org/141#Student>) " +* >>>>>>>> * "(?x >>>>>>>> http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type >>>>>>>> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type> >>>>>>>> http://www.semanticweb.org/141#Expert >>>>>>>> <http://www.semanticweb.org/141#Expert> )" + * >>>>>>>> >>>>>>>> "->(?x >>>>>>>> http://www.w3.org/1999/02/22-rdf-syntax-ns#rdf:type >>>>>>>> http://www.semanticweb.org/141#StudentExpert )]"; >>>>>>>> >>>>>>>> After prefixes, my query is: >>>>>>>> >>>>>>>> "Select * " + "where { ?x rdf:type std:StudentExpert. }"; >>>>>>>> >>>>>>>> My Reasoner and InfModel classes are: >>>>>>>> >>>>>>>> Reasoner reasoner2 = new GenericRuleReasoner(Rule.parseRules(rule)); >>>>>>>> >>>>>>>> InfModel inf = ModelFactory.createInfModel(reasoner2, model); >>>>>>>> >>>>>>>> Then query is executed as usual in jena. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Mon, Jul 25, 2016 at 2:38 PM, Dave Reynolds < >>>>>>>> >>>>>>>> dave.e.reyno...@gmail.com> >>>>>>> >>>>>>> wrote: >>>>>>>> >>>>>>>> On 25/07/16 19:33, javed khan wrote: >>>>>>>> >>>>>>>>> >>>>>>>>> I have a Student class (Phd students) and Teacher class, having >>>>>>>>> >>>>>>>>>> >>>>>>>>>> instances. >>>>>>>>> >>>>>>>> >>>>>>> There are some students which are also Teacher (teaching to junior >>>>>>>> >>>>>>>>> classes). >>>>>>>>>> ?x rdf:type ont:Student ?y rdf:type ont:Teacher --> ? >>>>>>>>>> This will give us Students and teachers instances. >>>>>>>>>> >>>>>>>>>> I want Jena generic rule(Forward chaining) which filters those who >>>>>>>>>> are >>>>>>>>>> both >>>>>>>>>> Teachers and Students. Is there any way to do so? >>>>>>>>>> >>>>>>>>>> Yes. You are nearly there but you want the rule body to be more >>>>>>>>>> >>>>>>>>> like: >>>>>>>>> >>>>>>>>> (?x rdf:type ont:Student) (?x rdf:type ont:Teacher) -> ... >>>>>>>>> >>>>>>>>> the rule consequent could assert a new type or some other property >>>>>>>>> to >>>>>>>>> indicate that ?x is in both classes. >>>>>>>>> >>>>>>>>> Dave >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> >>>>>>>> Lorenz Bühmann >>>>>>> AKSW group, University of Leipzig >>>>>>> Group: http://aksw.org - semantic web research center >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>> >>
