使用Jena检索owl文件数据

Question

<owl:Class rdf:about="http://purl.obolibrary.org/obo/DOID_0001">
            <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/DOID_11"/>   
            <obo:IAO_11 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">A def def def def.</obo:IAO_0000115> 
            <oboInOwl:hasDbXref rdf:datatype="http://www.w3.org/2001/XMLSchema#string">AA:006394</oboInOwl:hasDbXref>
            <oboInOwl:hasExactSynonym rdf:datatype="http://www.w3.org/2001/XMLSchema#string">abcde</oboInOwl:hasExactSynonym> 
            <rdfs:label rdf:datatype="http://www.w3.org/2001/XMLSchema#string">ABCDEFG</rdfs:label>
        </owl:Class>

//create the reasoning model using the base
 OntModel inf = ModelFactory.createOntologyModel();

 // use the FileManager to find the input file
 InputStream in = FileManager.get().open(inputFileName);
 if ( in == null) {
     throw new IllegalArgumentException("File: " + inputFileName + " not found");
 }

 inf.read( in , "");

 ExtendedIterator <? > classes = inf.listClasses();
 while (classes.hasNext()) {
     OntClass essaClasse = (OntClass) classes.next();

     System.out.println("Classe: " + essaClasse.getLocalName());
     for (Iterator <? > i = essaClasse.listSubClasses(); i.hasNext();) {

         OntClass c = (OntClass) i.next();
         System.out.print("   " + c.getLocalName() + "\n");
     } // end for 
 }

Answer 1

不，你错了。本体中的语句是

doid_0001 RDFS:doid_11的子类

这意味着doid_11是doid_0001的超类，反之亦然。如果您要求提供doid_0001的所有子类，那么实际上只是类本身的微不足道的推断。

    StmtIterator stmtIterator = inf.listStatements(essaClasse, null, (RDFNode) null);
    while(stmtIterator.hasNext()) {
        Statement st = stmtIterator.next();
        Property p = st.getPredicate();
        RDFNode o = st.getObject();
        System.out.println(p + ":" + o);
    }