如何将新的命名个体添加到XML/RDF owl文件？

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
         xmlns:owl="http://www.w3.org/2002/07/owl#"
         xmlns:xsd="http://www.w3.org/2001/XMLSchema#">

  <!-- 命名个体声明 -->
  <owl:NamedIndividual rdf:about="http://example.com/individuals#Person1">
    <rdf:type rdf:resource="http://example.com/ontology#Person"/>
    <owl:sameAs rdf:resource="http://dbpedia.org/resource/John_Doe"/>
    <owl:hasAge rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">30</owl:hasAge>
  </owl:NamedIndividual>

  <!-- 类别声明 -->
  <owl:Class rdf:about="http://example.com/ontology#Person"/>

  <!-- 属性声明 -->
  <owl:DatatypeProperty rdf:about="http://example.com/ontology#hasAge">
    <rdfs:domain rdf:resource="http://example.com/ontology#Person"/>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#integer"/>
  </owl:DatatypeProperty>

</rdf:RDF>