如何使用DotNetRDF设置OWL限制的数据类型？

问题描述 投票：0回答：1

我想让 TestClassB 类等效于 A 类和 OWLDataProperties“hasURI”，它具有多个 xsd:strings，将它们全部包装在一个等效类中。我使用 dotnetrdf 类编写了一些部分，但几乎不可能使用 owl:restriction 将所有类包装在单个等效类中，可能不再支持该库。

var g = new OntologyGraph();
 var baseURI = "semanticweb/hp/ontologies/2024/11/11";

 //OntoClass A
 OntologyClass testClassA = g.CreateOntologyClass(UriFactory.Create(baseURI + "/TestClass_A"));
 testClassA.AddType(UriFactory.Create(OntologyHelper.OwlClass));

 //OntoClass B
 OntologyClass testClassB = g.CreateOntologyClass(UriFactory.Create(baseURI + "/TestClass_B"));
 testClassB.AddType(UriFactory.Create(OntologyHelper.OwlClass));

 //OntoProperty
 OntologyProperty hasURI = g.CreateOntologyProperty(UriFactory.Create(baseURI + "/hasURI"));
 hasURI.AddDomain(testClassA);
 hasURI.AddRange(UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeString));

 //EquivalentClass
 testClassB.AddEquivalentClass(testClassA);
 testClassB.AddEquivalentClass(hasURI);
 testClassB.AddEquivalentClass(UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeString));

 g.Assert(g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_B")), 
           g.CreateUriNode(UriFactory.Create(OntologyHelper.PropertyEquivalentClass)),
          g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_A")));

 g.Assert(g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_B")),
           g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#intersectionOf")),
           g.CreateUriNode(UriFactory.Create("rdf:parseType")));

 g.Assert(g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_B")),
          g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#Restriction")),
          g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#onProperty")));

 g.Assert(g.CreateUriNode(UriFactory.Create(hasURI + "/TestClass_B")),
       g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#onProperty")),
       g.CreateUriNode(UriFactory.Create(baseURI + "/hasURI")));

 g.Assert(g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_B")),
         g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#Restriction")),
         g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#someValuesFrom")));

 g.Assert(g.CreateUriNode(UriFactory.Create(baseURI + "/TestClass_B")),
      g.CreateUriNode(UriFactory.Create("http://www.w3.org/2002/07/owl#someValuesFrom")),
      g.CreateUriNode(UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeString)));

 PrettyRdfXmlWriter writer = new PrettyRdfXmlWriter();
 writer.Save(g, "Example4.rdf");

文件保存后，owlClass的这一部分被写入到文件中，而owlRestriction的部分根本不包含，我不知道错误可能出在哪里。请帮助我，如何使用 DotNetRDF 设置 OWL 限制的数据类型。

  <owl:Class rdf:about="http://www.semanticweb.org/hp/ontologies/2024/11/11/TestClass_B">
    <owl:Restriction rdf:resource="http://www.w3.org/2002/07/owl#onProperty" />
    <owl:Restriction rdf:resource="http://www.w3.org/2002/07/owl#someValuesFrom" />
    <owl:equivalentClass rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/11/11/TestClass_A" />
    <owl:equivalentClass rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/11/11/hasURL" />
    <owl:equivalentClass rdf:resource="http://www.w3.org/2001/XMLSchema#string" />
    <owl:intersectionOf rdf:resource="rdf:parseType" />
    <owl:onProperty rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/11/11/hasURL" />
    <owl:someValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string" />
  </owl:Class>

请告诉我如何使用 DotNetRDF 设置 OWL 限制的数据类型？

我希望在保存此 rdf 后，dotnetrdf 自动将其设置为等效值，如下例所示。你能告诉我这是否可以使用 dotnetrdf 自动完成，我浏览了所有 dotnetrdf 文档，但找不到有关 owlRestriction 的任何内容，可能早期版本中的 owlRestriction 的辅助类已被 dotnetrdf 的开发人员删除，我们希望将来 owlRestriction 类的方法能够返回。我希望存储部分与下面的代码类似，但使用 dotnetrdf。

<owl:Class rdf:about="http://www.semanticweb.org/hp/ontologies/2024/10/untitled-ontology-60#TestClass_B">
        <owl:equivalentClass>
            <owl:Class>
                <owl:intersectionOf rdf:parseType="Collection">
                    <rdf:Description rdf:about="http://www.semanticweb.org/hp/ontologies/2024/10/untitled-ontology-60#TestClass_A"/>
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/10/untitled-ontology-60#hasURL"/>
                        <owl:someValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
                    </owl:Restriction>
                </owl:intersectionOf>
            </owl:Class>
        </owl:equivalentClass>
    </owl:Class>
c# .net owl dotnetrdf
1个回答
0
投票

[已修复] 几天前，我向 dotnetrdf 社区寻求帮助，不幸的是我没有得到我提出的问题的任何答案。 然而，直到今天我并没有放弃，终于成功创建了我正在寻找的方法，该方法的功能是使用 dotnetrdf 将原始类转换为定义的类。

OntologyGraph 基类仍然缺乏现成的方法“CreateOntologyRestriction”或“CreateOntologyIntersectionOf”，这些方法可以使用现成的方法创建限制，但我希望将来 dotnetrdf 开发人员能够创建现成的类并Restriction 和 IntersectionOf 方法。这部分保留给开发人员添加到新的 dotnetrdf 版本中。

我创建了不同的方法，并在官网的 dotnetrdf 文档部分做了各种研究，并在互联网上到处搜索，今天我终于完成了我正在寻找的解决方案。 我相信我的这一部分是对 dotnetrdf 社区的一个小小的贡献，希望这个方法能够被 dotnetrdf 开发者进一步推进。

出于教育和科学目的，您可以使用我创建的方法。让我们为 dotnetrdf 的利益做出贡献。

// Create a new RDF graph
IGraph graph = new Graph();

// Define namespaces
graph.NamespaceMap.AddNamespace("rdf", UriFactory.Create("http://www.w3.org/1999/02/22-rdf-syntax-ns#"));
graph.NamespaceMap.AddNamespace("owl", UriFactory.Create("http://www.w3.org/2002/07/owl#"));
graph.NamespaceMap.AddNamespace("xsd", UriFactory.Create("http://www.w3.org/2001/XMLSchema#"));
graph.NamespaceMap.AddNamespace("rdfs", UriFactory.Create("http://www.w3.org/2000/01/rdf-schema#"));

// Define the base URI for the ontology
graph.BaseUri = new Uri("http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/");

//Create the RDF:Ontology element
IUriNode ontologyNode = graph.CreateUriNode(graph.BaseUri);
graph.Assert(new Triple(ontologyNode, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:Ontology")));

//Create the Owl:Class element
IUriNode testClassA = graph.CreateUriNode(UriFactory.Create(graph.BaseUri + "TestClass_A"));
IUriNode testClassB = graph.CreateUriNode(UriFactory.Create(graph.BaseUri + "TestClass_B"));

// Add TestClass_A as an RDF Class
graph.Assert(new Triple(testClassA, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:Class")));
graph.Assert(new Triple(testClassB, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:Class")));

// Add 'hasURL' as a DatatypeProperty
// Define a datatype property 'hasURL' for TestClass_A
IUriNode hasURL = graph.CreateUriNode(UriFactory.Create(graph.BaseUri + "hasURL"));
graph.Assert(new Triple(hasURL, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:DatatypeProperty")));
graph.Assert(new Triple(hasURL, graph.CreateUriNode("rdfs:domain"), testClassA));
graph.Assert(new Triple(hasURL, graph.CreateUriNode("rdfs:range"), graph.CreateUriNode(UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeString))));

// Add OwlClass as an RDF Class
IBlankNode owlClass = graph.CreateBlankNode();
graph.Assert(new Triple(owlClass, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:Class")));

// Add OwlIntersectionOf as an RDF IntersectionOf
INode intersection = graph.CreateUriNode("owl:intersectionOf");

// Add OwlEquivalentClass as an RDF EquivalentClass
INode equivalentClass = graph.CreateUriNode("owl:equivalentClass");

// Add URI for onProperty and set datatype for SomeValuesFrom
IUriNode onProperty = graph.CreateUriNode(UriFactory.Create(graph.BaseUri + "hasURL"));
IUriNode someValuesFrom = graph.CreateUriNode(UriFactory.Create(XmlSpecsHelper.XmlSchemaDataTypeString));

// Create a restriction: hasURL some xsd:string
INode restriction = graph.CreateBlankNode();
graph.Assert(new Triple(restriction, graph.CreateUriNode("rdf:type"), graph.CreateUriNode("owl:Restriction")));
graph.Assert(new Triple(restriction, graph.CreateUriNode("owl:onProperty"), onProperty));
graph.Assert(new Triple(restriction, graph.CreateUriNode("owl:someValuesFrom"), someValuesFrom));

// Add the restriction to the class (TestClass_A) using equivalentClass
// Define restrictions, e.g., TestClass_A must have a property 'hasURL' with string values
INode definedRestriction = graph.AssertList(new List<INode>()
{
    testClassA,
    restriction
});

graph.Assert(new Triple(testClassB, equivalentClass, owlClass));
graph.Assert(new Triple(owlClass, intersection, definedRestriction));

// Write the RDF graph to an RDF/XML file
PrettyRdfXmlWriter writer = new PrettyRdfXmlWriter();
writer.Save(graph, "output.rdf");

Console.WriteLine("RDF graph has been saved to output.rdf");

输出：

<rdf:RDF xml:base="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <owl:Ontology rdf:about="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/"/>
    <owl:Class rdf:about="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/TestClass_A"/>
    <owl:Class rdf:about="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/TestClass_B">
        <owl:equivalentClass>
            <owl:Class>
                <owl:intersectionOf rdf:parseType="Resource">
                    <rdf:first rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/TestClass_A"/>
                    <rdf:rest rdf:parseType="Resource">
                        <rdf:first>
                            <owl:Restriction>
                                <owl:onProperty rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/hasURL"/>
                                <owl:someValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
                            </owl:Restriction>
                        </rdf:first>
                        <rdf:rest rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#nil"/>
                    </rdf:rest>
                </owl:intersectionOf>
            </owl:Class>
        </owl:equivalentClass>
    </owl:Class>
    <owl:DatatypeProperty rdf:about="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/hasURL">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/hp/ontologies/2024/12/12/untitled-ontology-60/TestClass_A"/>
        <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    </owl:DatatypeProperty>
</rdf:RDF>
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