添加DataProperty與Jena保持聯繫

Question

任何人都知道鋤頭將數據屬性添加到Jena中。我可以輕鬆添加對象屬性，但對於數據屬性莫名其妙地不起作用，而不是在數據屬性聲明中添加屬性，而是添加註釋。也許我的代碼有問題？

代碼

OntModel model = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM_MICRO_RULE_INF, null); 


      String NS = "http://www.semanticweb.org/thato/ontologies/2012/10/9/thesis_ontology#"; 
      model.read(in, null); 
      in.close(); 

      OntClass ApplicationModel = model.getOntClass(NS + "ApplicationModel"); 

      Individual AM20 = model.createIndividual(NS + xmlDoc.getDocumentElement().getAttribute("guid")+ theAttribute.getNodeValue(), ApplicationModel); 

      Individual dom = model.getIndividual(NS + domainElement.getAttribute(attrDomain)); 
      Individual pha = model.getIndividual(NS + neededString.trim()); 
      Individual lev = model.getIndividual(NS + lodElement.getAttribute(attrLOD)); 
      Individual typ = model.getIndividual(NS + theAttrType.getNodeValue()); 

      Property urlAdd = model.createProperty(NS + "http://xxxxx.com"); 

      // Create Object Property 
      ObjectProperty domain = model.createObjectProperty(NS +"hasDomain"); 
      ObjectProperty fase = model.createObjectProperty(NS +"hasPhase"); 
      ObjectProperty lod = model.createObjectProperty(NS +"hasLevelOfDetail"); 
      ObjectProperty type = model.createObjectProperty(NS +"hasType"); 

      model.add(AM20, domain, dom); 
      model.add(AM20, fase, pha); 
      model.add(AM20, lod, lev); 
      model.add(AM20, type, typ); 

      // Create Data Property 
      DatatypeProperty url = model.createDatatypeProperty(NS + "hasURL"); 

      model.add(AM20, url, urlAdd); 

      PrintStream p= new PrintStream("./src/thesis_ontology.owl"); 
      model.write(p, "RDF/XML-ABBREV", null); 
      p.close(); 

Answer 1

我想我發現了這個問題。希望它可以幫助別人一天：d

的代碼應該是這樣的

OntClass ApplicationModel = model.getOntClass(NS + "ApplicationModel"); 

      Individual AM20 = model.createIndividual(NS + xmlDoc.getDocumentElement().getAttribute("guid")+ theAttribute.getNodeValue(), ApplicationModel); 

      Individual dom = model.getIndividual(NS + domainElement.getAttribute(attrDomain)); 
      Individual pha = model.getIndividual(NS + neededString.trim()); 
      Individual lev = model.getIndividual(NS + lodElement.getAttribute(attrLOD)); 
      Individual typ = model.getIndividual(NS + theAttrType.getNodeValue()); 


      // Create Object Property 
      ObjectProperty domain = model.createObjectProperty(NS +"hasDomain"); 
      ObjectProperty fase = model.createObjectProperty(NS +"hasPhase"); 
      ObjectProperty lod = model.createObjectProperty(NS +"hasLevelOfDetail"); 
      ObjectProperty type = model.createObjectProperty(NS +"hasType"); 

      model.add(AM20, domain, dom); 
      model.add(AM20, fase, pha); 
      model.add(AM20, lod, lev); 
      model.add(AM20, type, typ); 

      // Create Data Property 
      DatatypeProperty url = model.createDatatypeProperty(NS + "hasURL"); 

      model.add(AM20, url, "http://...");