检索等效类/属性实例的最佳方法是什么

问题描述

我的数据库中有这些三元组：

<http://www.co-ode.org/ontologies/ont.owl#myCar>
        a       owl:Namedindividual,first:Car .
<http://www.co-ode.org/ontologies/ont.owl#Car>  a    owl:Class .
<http://www.co-ode.org/ontologies/ont.owl#myAutomobile>
        a       owl:Namedindividual,first:Automobile .
<http://www.co-ode.org/ontologies/ont.owl#Automobile>  a          owl:Class ;
        owl:equivalentClass  first:Car .

我要检索所有汽车和汽车个人。现在我使用这个查询：

PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-Syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX sosa: <http://www.w3.org/ns/sosa/>
PREFIX saref: <https://saref.etsi.org/core/>
PREFIX so: <http://purl.org/ontology/symbolic-music/>
prefix foaf: <http://xmlns.com/foaf/0.1/>
prefix cars: <http://www.w3.org/2002/03owlt/equivalentClass/premises001#>
SELECT disTINCT ?s ?type Where {
  {
    SELECT ?s ?type WHERE 
        {       
          ?type owl:equivalentClass cars:Car .
        ?s rdf:type ?type
        }
  } UNION {
    SELECT ?s ?type WHERE 
        {       
        ?s rdf:type cars:Car .
        ?s rdf:type ?type
        }
  }
  FILTER(?type != <http://www.w3.org/2002/07/owl#Namedindividual>)
}

结果是：

<http://www.co-ode.org/ontologies/ont.owl#myAutomobile> cars:Automobile
<http://www.co-ode.org/ontologies/ont.owl#myCar> cars:Car

没关系。如果我使用这个查询，显然会有不同的结果：

PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-Syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX sosa: <http://www.w3.org/ns/sosa/>
PREFIX saref: <https://saref.etsi.org/core/>
PREFIX so: <http://purl.org/ontology/symbolic-music/>
prefix foaf: <http://xmlns.com/foaf/0.1/>
prefix cars: <http://www.w3.org/2002/03owlt/equivalentClass/premises001#>
SELECT disTINCT ?s ?type Where {
  {
    SELECT ?s ?type WHERE 
        {       
          ?type owl:equivalentClass cars:Automobile .
        ?s rdf:type ?type
        }
  } UNION {
    SELECT ?s ?type WHERE 
        {       
        ?s rdf:type cars:Automobile .
        ?s rdf:type ?type
        }
  }
  FILTER(?type != <http://www.w3.org/2002/07/owl#Namedindividual>)
}

在这种情况下，只返回 http://www.co-ode.org/ontologies/ont.owl#myAutomobile 汽车：汽车。我在 TDB2 数据集之上使用 OWLFBRulereasoner 和 Genericrulereasoner，如下所示：

:modelInf rdf:type ja:InfModel;
    ja:baseModel :modelInfOwl ;
    ja:reasoner [ 
        ja:reasonerURL <http://jena.hpl.hp.com/2003/Genericrulereasoner>
    ] ;
.

:modelInfOwl rdf:type ja:InfModel;
    ja:baseModel :tdbGraph ;
    ja:reasoner [ 
        ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRulereasoner>
    ] ;
.

:tdbGraph rdf:type tdb2:GraphTDB ;
  tdb2:dataset siot:dataset .

我到底有什么地方可以做错或做得更好？

提前致谢，约翰，

解决方法

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