2013/1/25 Dave Reynolds <[email protected]>
> On 25/01/13 14:25, Tayfun Gökmen Halaç wrote:
>
>> Hi,
>>
>> Nothing changes if the model creation is done by
>> ModelFactory.**createOntologyModel(**OntModelSpec.OWL_MEM_TRANS_**INF)
>> in my
>> example code.
>>
>> What does "as(OntClass.class) part doesn't work" mean? If you get an
>> exception like com.hp.hpl.jena.ontology.**ConversionException, your class
>> resources do not have a type assertion.
>>
>
> It means there's no type assertion on that class :)
> By default OntModels work in strict mode, so to know that something can be
> treated as a class it is looking for a statement that it is of type
> owl:Class. If you have inference this may be inferred for you but in any
> case it is best practice to explicitly declare classes.
>
Here's the example.
OntModel model = ModelFactory
.createOntologyModel(OntModelSpec.OWL_MEM_TRANS_INF);
OntClass classA = model.createClass("http://bla.bla/A";);
Resource classB = model.createResource("http://bla.bla/B";);
classA.addDisjointWith(classB);
ExtendedIterator<OntClass> classes = model.listClasses();
while (classes.hasNext()) {
OntClass ontClass = (OntClass) classes.next();
System.out.println(ontClass);
}
If you create model with
OntModelSpec.OWL_MEM_MICRO_RULE_INF,
OntModelSpec.OWL_MEM_MINI_RULE_INF, OntModelSpec.OWL_MEM_RULE_INF,
OntModel infers the class assertion for the class B. But, it is not done
by OntModelSpec.OWL_MEM, OntModelSpec.OWL_MEM_RDFS_INF,
OntModelSpec.OWL_MEM_TRANS_INF.
>
> You can use ontmodel.setStrictMode(false) to disable this checking.
>
> Dave
>
>
>> Best,
>> Tayfun
>>
>>
>> 2013/1/25 Dave Reynolds <[email protected]>
>>
>> You don't need to load your ontology twice. An OntModel is just a wrapper
>>> round an underlying model so you can construct both a with-inference and
>>> a
>>> without-inference OntModel over the same Model.
>>>
>>> Dave
>>>
>>>
>>> On 25/01/13 03:35, Emanuel Santos wrote:
>>>
>>> Hi Tayfun,
>>>>
>>>> Thank you so much!
>>>>
>>>> That way only works if I choose a model without any class-hierarchy
>>>> inference. Of course.
>>>>
>>>> When I'm working with a model with class-hierarchy inference (e.g.
>>>> OWL_MEM_TRANS_INF
>>>> ou a reasoner) can I still get the direct Disjointwith classes ?? I
>>>> tried
>>>> it getting them using the baseModel but the "as(OntClass.class)" part
>>>> doesn't work. If there isn't any other way...I'm doomed to load 2x my
>>>> ontology... it is not good :) Any ideas ?
>>>>
>>>> Thanks!
>>>>
>>>> best,
>>>>
>>>> Emanuel
>>>>
>>>>
>>>>
>>>>
>>>> On 24 January 2013 22:32, Tayfun Gökmen Halaç
>>>> <[email protected]>****wrote:
>>>>
>>>> Hi Emanuel,
>>>>
>>>>>
>>>>> Not with a direct method. You can obtain those sets with a modified
>>>>> version
>>>>> of previous solution.
>>>>>
>>>>> // create the ontology...
>>>>> OntModel model = ModelFactory.****createOntologyModel();
>>>>> OntClass classA = model.createClass("http://bla.****bla/A<
>>>>> http://bla.bla/A>
>>>>> ");
>>>>> OntClass classB = model.createClass("http://bla.****bla/B<
>>>>> http://bla.bla/B>
>>>>> ");
>>>>> OntClass classC = model.createClass("http://bla.****bla/C<
>>>>> http://bla.bla/C>
>>>>> ");
>>>>> OntClass classD = model.createClass("http://bla.****bla/D<
>>>>> http://bla.bla/D>
>>>>> ");
>>>>>
>>>>> classA.addDisjointWith(classB)****;
>>>>> classA.addDisjointWith(classC)****;
>>>>>
>>>>> classC.addDisjointWith(classD)****;
>>>>>
>>>>>
>>>>> // list disjoint sets...
>>>>> ResIterator classesHasDisjoint = model
>>>>> .listResourcesWithProperty(****OWL.disjointWith);
>>>>> while (classesHasDisjoint.hasNext()) {
>>>>> OntClass cls = classesHasDisjoint.next().as(****OntClass.class);
>>>>> List<OntClass> disjointList = cls.listDisjointWith().toList(****);
>>>>> disjointList.add(0, cls);
>>>>> System.out.println(****disjointList);
>>>>>
>>>>> }
>>>>>
>>>>> Console output:
>>>>> [http://bla.bla/A, http://bla.bla/C, http://bla.bla/B]
>>>>> [http://bla.bla/C, http://bla.bla/D]
>>>>>
>>>>> Best,
>>>>> Tayfun
>>>>>
>>>>>
>>>>> 2013/1/24 Emanuel Santos <[email protected]>
>>>>>
>>>>> Hi,
>>>>>
>>>>>>
>>>>>> Thanks for the reply!
>>>>>>
>>>>>> Maybe I was not clear.
>>>>>>
>>>>>> For instance, given these classes:
>>>>>>
>>>>>> <owl:Class rdf:about="http://bla#A!>
>>>>>> <owl:disjointWith rdf:resource="http:/bla#B"/>
>>>>>> <owl:disjointWith rdf:resource="http:/bla#C"/>
>>>>>> </owl:Class>
>>>>>>
>>>>>> <owl:Class rdf:about="http://bla#C";>
>>>>>> <owl:disjointWith rdf:resource="http:/bla#D"/>
>>>>>> </owl:Class>
>>>>>>
>>>>>> I want to obtain these sets : {A,B,C} and {C,D}.
>>>>>> Only the direct classes.
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 24 January 2013 14:03, Fabio Aiub Sperotto <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>> Hi Emanuel,
>>>>>>
>>>>>>>
>>>>>>> I don't know if I have a good solution for you (I'm not the best
>>>>>>> programmer), but recently I made this: Search for all classes of
>>>>>>>
>>>>>>> ontology.
>>>>>>
>>>>>> For each class X, return the set of classes that is disjoint with X:
>>>>>>>
>>>>>>> model.read(new InputStreamReader(in), ""); //read the
>>>>>>> ontology
>>>>>>>
>>>>>>> Iterator classes = model.listClasses(); //list all classes
>>>>>>> in
>>>>>>> ontology
>>>>>>> while (classes.hasNext()){
>>>>>>> OntClass ontologyClass = (OntClass) classes.next();
>>>>>>> //get
>>>>>>>
>>>>>>> one
>>>>>>
>>>>>
>>>>> class
>>>>>>
>>>>>>>
>>>>>>> //get list of disjoint classes from ontologyClass
>>>>>>> Iterator disjointClasses =
>>>>>>>
>>>>>>> ontologyClass.****listDisjointWith();
>>>>>>
>>>>>
>>>>>
>>>>>> while(disjointClasses.hasNext(****)){
>>>>>>> System.out.print("Class "+ontologyClass.getLocalName()
>>>>>>> ****+"
>>>>>>> is
>>>>>>> disjoint with: ");
>>>>>>> System.out.println(****disjointClasses.next());
>>>>>>>
>>>>>>> }
>>>>>>> System.out.println("");
>>>>>>>
>>>>>>> }
>>>>>>>
>>>>>>> This will help? My some mistake?
>>>>>>>
>>>>>>>
>>>>>>> 2013/1/24 Emanuel Santos <[email protected]>
>>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>>>
>>>>>>>> I just started using Jena.
>>>>>>>> Any easyway to get all set of classes "disjointWith" ?
>>>>>>>>
>>>>>>>> Thanks
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Fabio Aiub Sperotto
>>>>>>> Mestrando em Modelagem Computacional
>>>>>>> about.me/fabiosperotto
>>>>>>> www.twitter.com/fabio_gk
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
