OWL:从现有的Ontology中获取Class

时间:2010-06-11 09:36:40

标签: java owl owl-api

如何使用OWL-API从Ontology获取现有类?这是我的本体论的一个片段:

<owl:Class rdf:ID="StringDocu">
  <owl:equivalentClass>
    <owl:Restriction>
      <owl:someValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
      <owl:onProperty rdf:resource="#hasContent"/>
    </owl:Restriction>
  </owl:equivalentClass>
  <rdfs:label rdf:datatype="http://www.w3.org/2001/XMLSchema#string"
    >String Docu</rdfs:label>
  <rdfs:subClassOf rdf:resource="#Docu"/>
  <owl:disjointWith rdf:resource="#URIDocu"/>
  <rdfs:comment rdf:datatype="http://www.w3.org/2001/XMLSchema#string"
    >This class concerns a docu with the content specified as common text.</rdfs:comment>
</owl:Class>

我从这段代码开始:

String ontologyUri = "http://mysite.com/my_ontology.owl";
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLOntology ontology = manager.createOntology(IRI.create(ontologyUri));
OWLDataFactory factory = manager.getOWLDataFactory();

现在我想要检索StringDocu类。我怎么能得到这个?

2 个答案:

答案 0 :(得分:2)

继续你在问题中显示的代码,你可以按如下方式直接引用该类(我假设你的类URI是“http://mysite.com/my_ontology.owl#StringDocu”):< / p>

OWLClass stringDocuClass = factory.getOWLClass(IRI.create("http://mysite.com/my_ontology.owl#StringDocu"))

这可以直接引用您所在的课程,并可以从那里学习。

希望这有帮助!

答案 1 :(得分:1)

我认为这将为您提供所加载的本体中引用的所有类:

String ontologyUri = "http://mysite.com/my_ontology.owl";
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLOntology ontology = manager.createOntology(IRI.create(ontologyUri));
Set <OWLClass> classes = ontology.getClassesInSignature();

然后,您可以在OWLClass

集合上处理/过滤/查找所需内容