似乎 OWLRDFConsumer 通常用于将 RDF 解析器与支持 OWL 的处理器连接起来。但是,正如我在评论中指出的那样,以下代码似乎可以工作,有几个地方我需要一个参数并放入我能做的唯一可用的东西。
以下代码: 创建一个本体;宣布两个有名字的人,汤姆和安娜;声明一个对象属性,喜欢;并声明一个数据属性age。一旦声明了这些,我们打印本体只是为了确保它是我们所期望的。然后它创建一个 OWLRDFConsumer。消费者构造函数需要一个本体、一个AnonymousNodeChecker和一个OWLOntologyLoaderConfiguration。对于配置,我只是使用了一个由无参数构造函数创建的,我认为没关系。对于节点检查器,唯一方便的实现者是 TurtleParser,所以我创建了其中一个,null
作为 Reader 传递。我认为这没问题,因为不会调用解析器来读取任何内容。然后消费者的句柄(IRI,IRI,IRI)和handle(IRI,IRI,OWLLiteral)方法用于一次处理一个三元组。我们添加三元组
:Tom :likes :Anna
:Tom :age 35
然后再次打印出本体以确保添加了断言。由于您已经获得了 RDFTriples,您应该能够提取 handle() 需要的参数。在处理三元组之前,本体包含:
<NamedIndividual rdf:about="http://example.org/Tom"/>
然后是:
<NamedIndividual rdf:about="http://example.org/Tom">
<example:age rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">35</example:age>
<example:likes rdf:resource="http://example.org/Anna"/>
</NamedIndividual>
这是代码:
import java.io.Reader;
import org.coode.owlapi.rdfxml.parser.OWLRDFConsumer;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLDataFactory;
import org.semanticweb.owlapi.model.OWLDataProperty;
import org.semanticweb.owlapi.model.OWLEntity;
import org.semanticweb.owlapi.model.OWLNamedIndividual;
import org.semanticweb.owlapi.model.OWLObjectProperty;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.model.OWLOntologyLoaderConfiguration;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.model.OWLOntologyStorageException;
import uk.ac.manchester.cs.owl.owlapi.turtle.parser.TurtleParser;
public class ExampleOWLRDFConsumer {
public static void main(String[] args) throws OWLOntologyCreationException, OWLOntologyStorageException {
// Create an ontology.
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLDataFactory factory = manager.getOWLDataFactory();
OWLOntology ontology = manager.createOntology();
// Create some named individuals and an object property.
String ns = "http://example.org/";
OWLNamedIndividual tom = factory.getOWLNamedIndividual( IRI.create( ns+"Tom" ));
OWLObjectProperty likes = factory.getOWLObjectProperty( IRI.create( ns+"likes" ));
OWLDataProperty age = factory.getOWLDataProperty( IRI.create( ns+"age" ));
OWLNamedIndividual anna = factory.getOWLNamedIndividual( IRI.create( ns+"Anna" ));
// Add the declarations axioms to the ontology so that the triples involving
// these are understood (otherwise the triples will be ignored).
for ( OWLEntity entity : new OWLEntity[] { tom, likes, age, anna } ) {
manager.addAxiom( ontology, factory.getOWLDeclarationAxiom( entity ));
}
// Print the the ontology to see that the entities are declared.
// The important result is
// <NamedIndividual rdf:about="http://example.org/Tom"/>
// with no properties
manager.saveOntology( ontology, System.out );
// Create an OWLRDFConsumer for the ontology. TurtleParser implements AnonymousNodeChecker, so
// it was a candidate for use here (but I make no guarantees about whether it's appropriate to
// do this). Since it won't be reading anything, we pass it a null InputStream, and this doesn't
// *seem* to cause any problem. Hopefully the default OWLOntologyLoaderConfiguration is OK, too.
OWLRDFConsumer consumer = new OWLRDFConsumer( ontology, new TurtleParser((Reader) null), new OWLOntologyLoaderConfiguration() );
// The consumer handles (IRI,IRI,IRI) and (IRI,IRI,OWLLiteral) triples.
consumer.handle( tom.getIRI(), likes.getIRI(), anna.getIRI() );
consumer.handle( tom.getIRI(), age.getIRI(), factory.getOWLLiteral( 35 ));
// Print the ontology to see the new object and data property assertions. The import contents is
// still Tom:
// <NamedIndividual rdf:about="http://example.org/Tom">
// <example:age rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">35</example:age>
// <example:likes rdf:resource="http://example.org/Anna"/>
// </NamedIndividual>
manager.saveOntology( ontology, System.out );
}
}