OWL API，在之间添加URI和名称，而不向其他部分添加URI

Question

<!-- Individual: http://www.co-ode.org/ontologies/pizza/pizza.owl#America -->

<owl:Thing rdf:about="#America">
    <rdf:type rdf:resource="#Country"/>
</owl:Thing>

 OWLClass tClass = dataFactory.getOWLClass(IRI.create("#Country"));
 OWLNamedIndividual tIndividual = dataFactory.getOWLNamedIndividual(IRI.create("#America"));
 OWLClassAssertionAxiom classAssertion = dataFactory.getOWLClassAssertionAxiom(tClass, tIndividual);
 manager.addAxiom(ontology, classAssertion);

输出：

<!-- #America -->

<owl:NamedIndividual rdf:about="#America">
    <rdf:type rdf:resource="#Country"/>
</owl:NamedIndividual>

它应该是什么：

<!-- http://www.co-ode.org/ontologies/pizza/pizza.owl#America -->

<owl:NamedIndividual rdf:about="#America">
    <rdf:type rdf:resource="#Country"/>
</owl:NamedIndividual>

我错过了什么，我如何让它看起来像披萨本体中的正确方式？我正在使用OWL API 4.0。

 OWLClass tClass = dataFactory.getOWLClass(IRI.create("#Country"));
 OWLNamedIndividual tIndividual = dataFactory.getOWLNamedIndividual(IRI.create("#America"));
 OWLClassAssertionAxiom classAssertion = dataFactory.getOWLClassAssertionAxiom(tClass, tIndividual);
 XMLWriterPreferences.getInstance().setUseNamespaceEntities(true);
 OWLDocumentFormat format = m.getOntologyFormat(ontology);

 format.asPrefixOWLOntologyFormat()
    .setPrefix("ns:",
               "http://www.co-ode.org/ontologies/pizza/pizza.owl#");

 try
 {
     m.addAxiom(ontology, classAssertion);
     m.saveOntology(ontology, format, new SystemOutDocumentTarget());
 } catch (OWLOntologyStorageException e)
 {
     e.printStackTrace();
     System.exit(0);
 }

 <!-- #America-->

 <owl:NamedIndividual rdf:about="#America">
     <rdf:type rdf:resource="#Country"/>
 </owl:NamedIndividual>

Answer 1

您试图在RDF/XML中输出相对IRI。OWL API不支持这一点（除了像您在代码中所做的那样实际创建具有相对IRI的实体。然而，所产生的本体违反了OWL 2概要文件）。

对于实体也可以得到类似的结果：

XMLWriterPreferences.getInstance().setUseNamespaceEntities(true);
ontology.getFormat()
            .asPrefixOWLOntologyFormat()
            .setPrefix("ns:",
                    "http://www.co-ode.org/ontologies/pizza/pizza.owl#");

并保存本体。