java - 我无法更新本体模型

Question

我在Protege中制作了Ontologu并导入Eclipse中。我的本体已经10实例，我想添加更多实例。下面的代码将实例添加到本体的现有类(名词)。执行后不会更新本体模型并显示相同数量的实例。

  public static void main(String[] args) throws OWLException, IOException{
  OWLOntologyManager manager = OWLManager.createOWLOntologyManager();

  File file = new File("D:\\word.owl");{  
      OntModel model=ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_RULE_INF);
       System.out.println("Model is called successfully");
    OWLOntology ont = manager.loadOntologyFromOntologyDocument(file);
    System.out.println("Loaded ontology: " + ont);

   String SOURCE = ("D:\\word.owl");
   String NS = SOURCE;
   OntModel base = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_RULE_INF);
   base.read( SOURCE, "" );

OntModel inf =ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_RULE_INF, base );

 OntClass Noun = base.getOntClass( NS + "Noun" );
 Individual jack = base.createIndividual( NS + "Jack", Noun );
 Individual Helley = base.createIndividual( NS + "Helley", Noun );  
  manager.saveOntology(ont);

 System.out.println("Number of individuals: " + ont.getIndividualsInSignature().size());

    }
  }
 }

输出

  Model is called successfully
  Loaded ontology: 
 Number of individuals: 10

Answer 1

我不使用该 API，但我可以看到您的问题。

在代码开头创建一个 OWLOntology 对象:

OWLOntology ont = manager.loadOntologyFromOntologyDocument(file);

问题是，您不会在代码中的任何位置更改 ont，因此当您调用下面的行时，它只会显示/保存您从文件加载的相同 10 个个体代码的开头:

manager.saveOntology(ont);

System.out.println("Number of individuals: " + ont.getIndividualsInSignature().size());

因此，要解决此问题，您需要在使用上述行之前以某种方式修改 ont 以包含新的个体。