I have written following code for extratcting URIs from a web page with content type application/rdf-xml for Linked Data application.

public static void test(String url)
{
    try
    {
        Model read = ModelFactory.createDefaultModel().read(url);
        System.out.println("to go");
        StmtIterator si;
        si = read.listStatements();
        System.out.println("to go");
        while(si.hasNext())
        {
            Statement s=si.nextStatement();
            Resource r=s.getSubject();
            Property p=s.getPredicate();
            RDFNode o=s.getObject();
            System.out.println(r.getURI());
            System.out.println(p.getURI());
            System.out.println(o.asResource().getURI());
        }
    }
    catch(JenaException | NoSuchElementException c)
    {    }
}

But above code is not extracting all URIs. It provides only few of the URIs. Please guide me where i Went wrong?? hey Rafeel For Eq:

for XML File :

          <?xml version="1.0"?>
           <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
          xmlns:dc="http://purl.org/dc/elements/1.1/"
         xmlns:ex="http://example.org/stuff/1.0/">
        <rdf:Description rdf:about="http://www.w3.org/TR/rdf-syntax-grammar"
       dc:title="RDF/XML Syntax Specification (Revised)">
            <ex:editor>
              <rdf:Description ex:fullName="Dave Beckett">
        <ex:homePage rdf:resource="http://purl.org/net/dajobe/" />
              </rdf:Description>
            </ex:editor>
             </rdf:Description>
         </rdf:RDF>

The output is :

        Subject URI is http://www.w3.org/TR/rdf-syntax-grammar
        Predicate  URI is http://example.org/stuff/1.0/editor
      Object URI is null
          Subject URI is http://www.w3.org/TR/rdf-syntax-grammar
         Predicate  URI is http://purl.org/dc/elements/1.1/title
       Website is read