从XML创建RDF

Question

我有这个xml文件，如何在Java中使用xpath和ModelFactory从中创建RDF三元组？

<xml>
<person>
<name>Joe</name>
<website url="www.example1.com">contact1</website >
<vote>20</vote>
</person>
<person>
<name>Anna</name>
<website url="www.example2.com">contact2</website>
<vote>80</vote>
</person>
</xml>

感谢帮助

---

感谢您的重播，我想获得以下RDF

 <rdf:Description rdf:about="http://www.example.com/xml">
<j.0:hasCritic>Joe</j.0:hasCritic>
     <rdf:Description rdf:about=Joe >
     <j.0:haswebsite>"www.example1.com"</j.0:haswebsite>
      <j.0:hascontact>contact1</j.0:hascontact>
      <j.0:hasvote>80</j.0:hasvote>
  </rdf:Description>
  <j.0:hasCritic>Anna</j.0:hasCritic>
     <rdf:Description rdf:about=Anna>
     <j.0:haswebsite>"www.example2.com"</j.0:haswebsite>
      <j.0:hascontact>contact2</j.0:hascontact>
      <j.0:hasvote>20</j.0:hasvote>
</rdf:Description>

Answer 1

You can use jena api for creating RDf model. Just parse xml file using dom parser and create Resourse , Property or Literal using Jena API. After creating this simply add into model.

Example:-
Model rdfModel = ModelFactory.createDefaultModel();
Resource resourse = rdfModel.createResource(Resourse Text);
Property property = rdfModel.createProperty(Property Text);
Literal literal = rdfModel.createLiteral(Literal Text);
resourse.addLiteral(property,literal);

使用Jena API，您可以将此模型存储到rdf数据库（三重）中。

Answer 2

Grddl可能是一种可行的方法，Jena的实现非常简单易用。 否则，只需一个基本的XSLT脚本就可以轻松地将该代码段转换为RDF。 天哪，您甚至可能只编写了一个基本的SAX侦听器并在那里进行了转换。 没有什么神奇的事情可以帮您完成，您将需要做一些工作，但是有可用的选项。

Answer 3

package tutorial;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;

public class Test01 {
public static void main(String[] args) {
Model m = ModelFactory.createDefaultModel();
String NS = "<http://www.example.com/>";

Resource r1 = m.createResource( NS+"xml" );
Resource r2 = m.createResource( NS+"Joe" );
Resource r3 = m.createResource( NS+"Anna" );            
Property p1 = m.createProperty( NS+"hasCritic1" );
Property p2 = m.createProperty( NS+"hasCritic2" ); 
Property p3 = m.createProperty( NS+"hasWebsite" );
Property p4 = m.createProperty( NS+"hasContact" );
Property p5 = m.createProperty( NS+"hasVote" );

r1.addProperty(p1,r2);
r1.addProperty(p2,r3);
r2.addProperty(p3,"<http://www.example1.com>");
r2.addProperty(p4,"contact1");
r2.addProperty(p5,"80");
r3.addProperty(p3,"<http://www.example2.com>");
r3.addProperty(p4,"contact2");
r3.addProperty(p5,"20");
m.write( System.out );
} 
}