[英]Jena OWL/RDF FunctionalProperty
我需要实现这样的OWL格式:
<owl:DatatypeProperty rdf:ID="Role-description"> <rdfs:range
rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
<rdfs:domain rdf:resource="#Role"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
我正在使用耶拿,当我尝试下一步时:
DatatypeProperty datatypeProperty = ontModel.createDatatypeProperty(OWL.NS + "Role-description");
datatypeProperty.addRDFType(OWL.FunctionalProperty);
datatypeProperty.asDatatypeProperty();
获得所有老虎钳。
<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#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#">
<owl:Class rdf:about="http://www.w3.org/2002/07/owl#Task"/>
<owl:Class rdf:about="http://www.w3.org/2002/07/owl#Actor"/>
<owl:ObjectProperty rdf:about="http://www.w3.org/2002/07/owl#Task-performedBy-Actor"/>
<owl:ObjectProperty rdf:about="http://www.w3.org/2002/07/owl#Actor-performs-Task"/>
<owl:FunctionalProperty rdf:about="http://www.w3.org/2002/07/owl#Role-description">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
</owl:FunctionalProperty>
</rdf:RDF>
将不胜感激任何建议
你得到的输出反之亦然 。 您基本上拥有的是具有多种类型的RDF资源。 这取决于Jena如何序列化它们(即哪一个被认为是“主要的”)。 为了说明,我将您的示例序列化为Turtle(稍微修改为使用自定义命名空间):
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix roles: <http://example.com/ns/roles#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
roles:Role-description
a owl:DatatypeProperty , owl:FunctionalProperty .
现在,以下是如何操作类型的顺序以方便序列化:
public static final String ROLES_NS = "http://example.com/ns/roles#";
public static void main(String[] args) {
OntModel ontModel = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM);
ontModel.setNsPrefix("roles", ROLES_NS);
DatatypeProperty prop = ontModel.createDatatypeProperty(
ROLES_NS + "Role-description");
prop.setRDFType(OWL.FunctionalProperty);
prop.addRDFType(OWL.DatatypeProperty);
RDFDataMgr.write(System.out, ontModel, RDFFormat.RDFXML_PRETTY);
}
它产生以下输出:
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns:roles="http://example.com/ns/roles#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#">
<owl:DatatypeProperty rdf:about="http://example.com/ns/roles#Role-description">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
</owl:DatatypeProperty>
</rdf:RDF>
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