使用owl api获取个人属性

时间:2014-07-31 14:54:27

标签: java owl ontology

我试图读取存储在本体中的信息。 XML绑定(我工作的部分)是:

<!-- hasPrevious and hasNext are defined at the imported ontology -->
<owl:NamedIndividual   rdf:about="http://www.myexampledomain.com/myExample.owl#one_relationship">
    <rdf:type rdf:resource="http://www.myexampledomain.com/myExample.owl#typeA"/>
    <intui_PO:hasPrevious rdf:resource="http://www.myexampledomain.com/myExample.owl#element01"/>
    <intui_PO:hasNext rdf:resource="http://www.myexampledomain.com/myExample.owl#element02"/>
</owl:NamedIndividual>

我使用以下Java代码:

//Create factories that will produce the objects
OWLReasonerFactory reasonerFactory = new StructuralReasonerFactory();
OWLDataFactory fac = man.getOWLDataFactory();

//Get a reasoner, to query the ontology
OWLReasonerConfiguration config = new SimpleConfiguration();
OWLReasoner reasoner = reasonerFactory.createReasoner(owlOnt, config);

//Get relations. Their properties are the related individuals
OWLClass myclass = fac.getOWLClass(IRI.create("http://www.myexampledomain.com/myExample.owl#RelationClass"));
NodeSet<OWLNamedIndividual> individualsRelationNodeSet = reasoner.getInstances(myclass,false);
Set<OWLNamedIndividual> relations = individualsRelationNodeSet.getFlattened();

有了这个,我找到了被发现的关系的名字个人。我想用以下内容阅读他们的属性:

Map<OWLObjectPropertyExpression,Set<OWLIndividual>> properties = oneRelation.getObjectPropertyValues(owlOnt);

但我得到一张空地图。我找不到解决方案,任何人都可以帮助我吗?

1 个答案:

答案 0 :(得分:4)

我不确定你在做什么,但是有一种更简单的方法来阅读本体中的个体而不是你使用的个体。我建议你阅读OWL API文档,它有很多很好的例子。

Set<OWLLogicalAxiom> axiomSet=localOntology.getLogicalAxioms();
    Iterator<OWLLogicalAxiom> iteratorAxiom= axiomSet.iterator();

    while(iteratorAxiom.hasNext()) {
        OWLAxiom tempAx= iteratorAxiom.next();
        if(!tempAx.getIndividualsInSignature().isEmpty()){
            System.out.println(tempAx.getIndividualsInSignature());
            System.out.println(tempAx.getDataPropertiesInSignature());
            System.out.println(tempAx.getObjectPropertiesInSignature());
        }
    }

基本上,你可以检查每个公理是否有一个嵌入其中的个体,然后提取属性。