做过本体查询的请进，求解~~~ 送分。。

[lihan6415151528]

我的查询结果为什么是空呢？owl里面明明有：

  <owl:Class rdf:ID="Trees">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Plant"/>
    </rdfs:subClassOf>
  </owl:Class>

查询代码：

		OntModel text_ontmodel = ModelFactory.createOntologyModel();
		OntDocumentManager dm = text_ontmodel.getDocumentManager();
		
		dm.addAltEntry("http://www.w3.org/1999/02/22-rdf-syntax-ns#", "file:d://NewAnimalTest_bef_mysql.owl");
		text_ontmodel.read("http://www.w3.org/1999/02/22-rdf-syntax-ns#");
		
		String prefix = "PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#> "+" PREFIX base: <http://www.owl-ontologies.com/Ontology1229986688.owl> ";
		
		String select = " SELECT ?y ";
		String where  = " where{?y rdfs:subClassOf base:Plant}";
		
		Query query = QueryFactory.create(prefix + select + where);
		Reasoner reasoner = ReasonerRegistry.getOWLReasoner();
		InfModel inf = ModelFactory.createInfModel(reasoner, text_ontmodel);
		
		QueryExecution qe = QueryExecutionFactory.create(query,inf);

		ResultSet results = qe.execSelect();
	    ResultSetFormatter.out(System.out,results,query);

	    qe.close();

昨天发的帖子http://topic.csdn.net/u/20090406/16/9aaf6319-4ead-4cc3-a851-2261142f17b1.html都没有人回答，帮顶也有分的

[rachel_tang]

解析?00

[tanwei1002]

Java不懂。。。。

[marry89]

你解决了没？我也是做本体的

[fenfeng214]

本体匹配不太好做啊，理论性真强