Question

我正在使用APACHE Jena ONT模型来解析RDF / XML OWL文件并对其进行处理。使用当前的ONT模型，ONT模型中无法识别 owl：maxQualifiedCardinality 和 owl：minQualifiedCardinality 的限制。我还查看了org.apache.jena.ontology包的限制界面，发现不支持这些限制，而是支持owl：minCardinality和owl：maxCardinality。我现在想知道Jena ONT模型是否也可以考虑这些限制：owl：maxQualifiedCardinality，owl：minQualifiedCardinality

如果你能告诉我你的经历，我会很高兴的。使用Jena ont模型处理这些限制和处理数据

<owl:Class rdf:about="http://test#Numeric"> <rdfs:subClassOf rdf:resource="http://test#Characteristic"/> <rdfs:subClassOf> <owl:Restriction> <owl:onProperty rdf:resource="http://test#hasUnit"/> <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality> <owl:onClass rdf:resource="http://test#Scale"/> </owl:Restriction> </rdfs:subClassOf> <rdfs:label>Numeric</rdfs:label> </owl:Class>

Answer 1

Apache Jena本体API（OntModel）不支持OWL2 DL。您可以查看基于耶拿的替代方案（即ONT-API）。这是OWL-2特有的另一个jena接口，包括owl：maxQualifiedCardinality

等

示例：

    OntGraphModel model = OntModelFactory.createModel();
    model.setID("http://test");
    OntNOP property = model.createOntEntity(OntNOP.class, "http://test#hasUnit");
    OntClass clazz = model.createOntEntity(OntClass.class, "http://test#Numeric");
    clazz.addLabel("Numeric", null);
    clazz.addSubClassOf(model.createOntEntity(OntClass.class, "http://test#Characteristic"));
    clazz.addSubClassOf(model.createObjectMaxCardinality(property, 1,
            model.createOntEntity(OntClass.class, "http://test#Scale")));

    StringWriter sw = new StringWriter();
    model.write(sw, "rdf/xml");
    System.out.println(sw);

    // another way to create OntGraphModel:
    InputStream in = new ByteArrayInputStream(sw.toString().getBytes(StandardCharsets.UTF_8));
    OntGraphModel reloaded = OntManagers.createONT().loadOntologyFromOntologyDocument(in).asGraphModel();
    int cardinality = reloaded.ontObjects(OntCE.ObjectMaxCardinality.class)
            .mapToInt(OntCE.Cardinality::getCardinality).findFirst().orElseThrow(IllegalStateException::new);
    System.out.println(cardinality);

输出继电器：

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
  <owl:Ontology rdf:about="http://test"/>
  <owl:Class rdf:about="http://test#Characteristic"/>
  <owl:Class rdf:about="http://test#Scale"/>
  <owl:Class rdf:about="http://test#Numeric">
    <rdfs:subClassOf>
      <owl:Restriction>
        <owl:onClass rdf:resource="http://test#Scale"/>
        <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger"
        >1</owl:maxQualifiedCardinality>
        <owl:onProperty>
          <owl:ObjectProperty rdf:about="http://test#hasUnit"/>
        </owl:onProperty>
      </owl:Restriction>
    </rdfs:subClassOf>
    <rdfs:subClassOf rdf:resource="http://test#Characteristic"/>
    <rdfs:label>Numeric</rdfs:label>
  </owl:Class>
</rdf:RDF>

1

如果你找到了Jena-Ontology-API，你可以将图形传递回OntModel界面：

OntModel jena = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM, reloaded);
        jena.write(System.out, "rdf/xml");

支持owl：maxQualifiedCardinality和owl：minQualifiedCardinality限制由APACHE Jena Ont模型

1 个答案: