JenaModel将RDF类型的显式声明转换为隐式声明，并扰乱格式

Question

我有以下代码，它创建了一个具有一些设置属性的RDF资源，并将其打印在控制台上。

String uri = "http://krweb/";
String name = "Giorgos Georgiou";
String phone = "6976067554";
String age = "27";
String department = "ceid";
String teaches = "java";
Model model = ModelFactory.createOntologyModel();
model.setNsPrefix("krweb", uri);
Resource giorgosgeorgiou = model.createResource(uri+name.toLowerCase().replace(" ", ""), model.createResource(uri+"Professor"));
Property has_name = model.createProperty(uri+"has_name");
Property has_phone = model.createProperty(uri+"has_phone");
Property has_age = model.createProperty(uri+"has_age");
Property member_of = model.createProperty(uri+"member_of");
Property teach = model.createProperty(uri+"teaches");
giorgosgeorgiou.addProperty(teach, model.createResource(uri+teaches));
giorgosgeorgiou.addProperty(member_of, model.createResource(uri+department));
giorgosgeorgiou.addProperty(has_age,age);
giorgosgeorgiou.addProperty(has_phone,phone);
giorgosgeorgiou.addProperty(has_name,name);
//giorgosgeorgiou.addProperty(RDF.type, model.createResource(uri+"Professor"));
model.write(System.out,"RDF/XML");

我想把模型打印成这种格式：

<rdf:Description rdf:about="http://krweb/giorgosgeorgiou">
<rdf:type rdf:resource="http://krweb/Professor"/>
<krweb:has_name>Giorgos Georgiou</krweb:has_name>
<krweb:has_phone>6976067554</krweb:has_phone>
<krweb:has_age>27</krweb:has_age>
<krweb:member_of rdf:resource="http://krweb/ceid"/>
<krweb:teaches rdf:resource="http://krweb/java" />
</rdf:Description>

相反，我得到了这个：

<krweb:Professor rdf:about="http://krweb/giorgosgeorgiou">
<krweb:has_name>Giorgos Georgiou</krweb:has_name>
<krweb:has_phone>6976067554</krweb:has_phone>
<krweb:has_age>27</krweb:has_age>
<krweb:member_of rdf:resource="http://krweb/ceid"/>
<krweb:teaches rdf:resource="http://krweb/java"/>
</krweb:Professor>

不知怎的，rdf类型属性被转换为某种隐式声明，并以我认为是"漂亮"的格式呈现。有办法绕过这个吗？

Answer 1

在内部，RDF数据被保存为三元组，不知道它们在输入时是如何格式化的。

默认输出是漂亮的RDF/XML。

要获得简单、平坦的格式，请使用RDFFormat.RDFXML_PLAIN

RDFDataMgr.write(System.out, model, RDFFormat.RDFXML_PLAIN);