我如何为Jena的Ontology添加一些三倍?
我有class1
instance2
和class2
instance2
。 我也在我的本体中定义了HasName(object property)
。 现在,如何通过jena将triple( instance1 HasName instance2
)添加到我的本体?
这是一种不处理中间Statements
。
// RDF Nodes -- you can make these immutable in your own vocabulary if you want -- see Jena's RDFS, RDF, OWL, etc vocabularies Resource class1 = ResourceFactory.createResource(yourNamespace + "class1"); Resource class2 = ResourceFactory.createResource(yourNamespace + "class1"); Property hasName = ResourceFactory.createProperty(yourNamespace, "hasName"); // hasName property // The RDF Model Model model = ... // Use your preferred method to get an OntModel, InfModel, or just regular Model Resource instance1 = model.createResource(instance1Uri); Resource instance2 = model.createResource(instance2Uri); // Create statements instance1.addProperty(RDF.type, class1); // Classification of instance1 instance2.addProperty(RDF.type, class2); // Classification of instance2 instance1.addProperty(hasName, instance2); // Edge between instance1 and instance2
您还可以使用builder-ish模式链接其中一些调用。
Resource instance2 = model.createResource(instance2Uri).addProperty(RDF.type, class2); model.createResource(instance1Uri).addProperty(RDF.type, class1).addProperty(hasName, instance2);
在Jena中,这可以通过创建Statement的实例(三元组或四元组),然后将语句提交给Model的实例来完成。
例如,请考虑以下事项:
OntModel model = ModelFactory.createOntologyModel(); // an ont model instance ... Statement s = ResourceFactory.createStatement(subject, predicate, object); model.add(s); // add the statement (triple) to the model
其中subject
, predicate
和object
是三元组的实例元素,其类型符合ResourceFactory.createStatement()的接口。