如何使用Python从本体文件中提取类，子类和对象属性

Question

我有用RDF语法编写的扩展名为.owl的本体文件。以下是文件的一小部分。我想从该文件中提取每个类的所有类和子类以及它的对象属性。请让我知道我们应该如何使用Python（RDFLIB可能是??）来做到这一点。谢谢Adance。

<?xml version="1.0"?>
<rdf:RDF xmlns="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#"
     xml:base="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
    <owl:Ontology rdf:about="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15">
        <rdfs:comment>Ontology example</rdfs:comment>
    </owl:Ontology>



    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Object Properties
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->




    <!-- http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropName -->

    <owl:ObjectProperty rdf:about="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropName">
        <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2002/07/owl#topObjectProperty"/>
        <rdfs:domain>
            <owl:Restriction>
                <owl:onProperty rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropName"/>
                <owl:someValuesFrom rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#CropName"/>
            </owl:Restriction>
        </rdfs:domain>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropSize -->

    <owl:ObjectProperty rdf:about="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropSize">
        <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2002/07/owl#topObjectProperty"/>
        <rdfs:domain>
            <owl:Restriction>
                <owl:onProperty rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasCropSize"/>
                <owl:someValuesFrom rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#CropQuantity"/>
            </owl:Restriction>
        </rdfs:domain>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasFieldId -->

    <owl:ObjectProperty rdf:about="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasFieldId">
        <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2002/07/owl#topObjectProperty"/>
        <rdfs:domain>
            <owl:Restriction>
                <owl:onProperty rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#hasFieldId"/>
                <owl:someValuesFrom rdf:resource="http://www.semanticweb.org/manojdeshpande/ontologies/2019/11/untitled-ontology-15#FieldId"/>
            </owl:Restriction>
        </rdfs:domain>
    </owl:ObjectProperty>