Dear friends,
I am developing ontology for supply chain management and I am
encountering some problems regarding Jena API. In my ontology I have
following structure:
classA
classA1
classA2
classA3
classA4
classB
classC
classD
Classes are representing some documents for example (classA = planning
doc, classB = execution doc, etc.). Now I would like to connect
(relationship) these classes with same ObjectProperty. In Jena
Ontology API it sais: In an ontology, a property denotes the name of a
relationship between resources, or between a resource and a data
value. I followed jena api and did the relationship like this
(OntologyPrintscreen.jpg in attachment):
//let's start some JENA code -- simple default RDF model
String baseURI = InitInfo.getInstance().getDefaultBaseURI();
//create ontology model
OntModel processModel =
ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_TRANS_INF);
//createResource
Resource r = processModel.createResource(baseURI + "r");
OntClass classA = processModel.createClass(baseURI + "classA");
OntClass classB = processModel.createClass(baseURI + "classB");
OntClass classC = processModel.createClass(baseURI + "classC");
OntClass classD = processModel.createClass(baseURI + "classD");
classA.addSubClass(processModel.createClass(baseURI +
"classA1"));
classA.addSubClass(processModel.createClass(baseURI +
"classA2"));
classA.addSubClass(processModel.createClass(baseURI +
"classA3"));
classA.addSubClass(processModel.createClass(baseURI +
"classA4"));
OntClass classA1 = processModel.getOntClass(baseURI +
"classA1");
OntClass classA2 = processModel.getOntClass(baseURI +
"classA2");
OntClass classA3 = processModel.getOntClass(baseURI +
"classA3");
OntClass classA4 = processModel.getOntClass(baseURI +
"classA4");
ObjectProperty uses =
processModel.createObjectProperty(baseURI + "uses");
ObjectProperty creates =
processModel.createObjectProperty(baseURI +
"creates");
creates.addDomain(classA1);
creates.addRange(classA2);
uses.addDomain(classA1);
uses.addRange(classB);
My problem: I would like to use same objectProperty (uses and creates)
to model relationship between my classes. For example:
classA1 uses classB
classA1 creates classA2
classA2 creates classA3
classA3 uses classD
classA4 creates classC
There is a desired look (what I would like to achieve) with jena api
(OntologyDesired.jpg). I've already tried:
creates.addDomain(classA2);
creates.addRange(classA3);
uses.addDomain(classA3);
uses.addRange(classD);
But statements get disregarded.
Can you please help me model relationships between these classes with
same ObjectProperty, is this even possible? With protege API you can
do this:
OWLObjectProperty childrenProperty =
owlModel.createOWLObjectProperty("children");
childrenProperty.addUnionRangeClass(personClass);
childrenProperty.addUnionRangeClass(animalClass);
Is something like that possible with Jena, I haven't found anything on
the web, so you are my final chance :)
Looking forward for your answer.
Thank you and my best regards,
Bojan Milic
--
Lep pozdrav,
Bojan Milić
