[英]retrieve owl file data using Jena
I have the following owl file and want to retrieve the related data to a given class. 我有以下owl文件,并希望将相关数据检索到给定的类。
<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>
For example I wanted to retrieve the subClassOf which should be DOID_11 without success using the following code: 例如,我想使用以下代码来检索subClassOf,该子类应为DOID_11而不成功:
//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
}
I get just "DOID_0001" instead of "DOID_0001" and "DOID_11". 我只得到“ DOID_0001”,而不是“ DOID_0001”和“ DOID_11”。 I need also to get all of the other information such as "" and "
我还需要获取所有其他信息,例如“”和“
No, you are wrong. 不,你错了。 The statement in your ontology is
本体中的陈述是
DOID_0001 rdfs:subClassOf DOID_11
That means, DOID_11
is the superclass of DOID_0001
not vice versa. 这意味着,
DOID_11
是超DOID_0001
而不是相反。 And if you ask for all subclasses of DOID_0001
, it's indeed only the class itself as trivial inference. 而且,如果您请求
DOID_0001
所有子类,则实际上只是类本身是微不足道的推断。
Statements for each class can be retrieved via 可以通过以下方式检索每个类的语句
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);
}
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