使用rdf：ID的SPARQL查询不返回任何结果

时间：2015-12-24 03:12:47

标签： java rdf sparql jena semantic-web

我有一个猫头鹰文件，我正在尝试对其运行查询但没有得到任何结果请帮助我弄明白并解释基本查询

public static void main(String[] args) {
      String filename="H:/Samson_study/nodeTest/hRESTS-TC3/ontology/ApothecaryOntology.owl";
      Model model=ModelFactory.createDefaultModel();
      OntModel model1=ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM,model);

      try
      {          File file=new File(filename);
          FileInputStream reader=new FileInputStream(file);
          model.read(reader,null);


          String query1=" PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX my: <http://127.0.0.1/ontology/ApothecaryOntology.owl#> SELECT  ?result WHERE { ?result rdf:ID my:HealthInsuranceNumber .}";

          Query query=QueryFactory.create(query1);
          QueryExecution exe=QueryExecutionFactory.create(query, model1);
          ResultSet RES=exe.execSelect();
          ResultSetFormatter.out(System.out, RES, query);
      }catch(Exception e)
      {
          e.printStackTrace();
      }
  }

本体论如下：

<?xml version="1.0"?>
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns="http://127.0.0.1/ontology/ApothecaryOntology.owl#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xml:base="http://127.0.0.1/ontology/ApothecaryOntology.owl">
  <owl:Ontology rdf:about=""/>
  <owl:Class rdf:ID="Costs"/>
  <owl:Class rdf:ID="HealthInsuranceNumber">
    <owl:disjointWith>
      <owl:Class rdf:ID="TelephoneNumber"/>
    </owl:disjointWith>
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Number"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Room">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Ward"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:about="#Ward">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Hospital"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="PhysicianID">
    <rdfs:subClassOf rdf:resource="#Number"/>
  </owl:Class>
  <owl:Class rdf:ID="HospitalPhysician">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Physician"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Name"/>
  <owl:Class rdf:ID="Symptom"/>
  <owl:Class rdf:about="#Hospital">
    <owl:disjointWith>
      <owl:Class rdf:ID="EmergencyStation"/>
    </owl:disjointWith>
    <rdfs:subClassOf>
      <owl:Class rdf:ID="MedicalOrganisation"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:ID="Patient">
    <rdfs:subClassOf>
      <owl:Class rdf:ID="Person"/>
    </rdfs:subClassOf>
  </owl:Class>
  <owl:Class rdf:about="#Physician">
    <rdfs:subClassOf rdf:resource="#Person"/>
  </owl:Class>
  <owl:Class rdf:ID="EmergencyPhysician">
    <rdfs:subClassOf rdf:resource="#Physician"/>
  </owl:Class>
  <owl:Class rdf:ID="Treatment"/>
  <owl:Class rdf:about="#EmergencyStation">
    <rdfs:subClassOf>
      <owl:Class rdf:about="#MedicalOrganisation"/>
    </rdfs:subClassOf>
    <owl:disjointWith rdf:resource="#Hospital"/>
  </owl:Class>
  <owl:Class rdf:ID="CostAndHealingPlan"/>
  <owl:Class rdf:ID="OperatingRoom">
    <rdfs:subClassOf rdf:resource="#Ward"/>
  </owl:Class>
  <owl:Class rdf:ID="Disease"/>
  <owl:Class rdf:ID="Organisation"/>
  <owl:Class rdf:ID="PersonName">
    <rdfs:subClassOf rdf:resource="#Name"/>
  </owl:Class>
  <owl:Class rdf:ID="PublicOrganisation">
    <rdfs:subClassOf rdf:resource="#Organisation"/>
  </owl:Class>
  <owl:Class rdf:about="#TelephoneNumber">
    <owl:disjointWith rdf:resource="#HealthInsuranceNumber"/>
    <rdfs:subClassOf rdf:resource="#Number"/>
  </owl:Class>
  <owl:Class rdf:ID="Drug"/>
  <owl:Class rdf:ID="DateTime"/>
  <owl:Class rdf:ID="Diagnosis"/>
  <owl:Class rdf:about="#MedicalOrganisation">
    <rdfs:subClassOf rdf:resource="#PublicOrganisation"/>
  </owl:Class>
  <owl:ObjectProperty rdf:ID="Drug_treatDisease">
    <rdfs:range rdf:resource="#Disease"/>
    <rdfs:domain rdf:resource="#Drug"/>
  </owl:ObjectProperty>
  <owl:ObjectProperty rdf:ID="ListOfHospitals_consistsOf">
    <rdfs:range rdf:resource="#Hospital"/>
  </owl:ObjectProperty>
  <owl:ObjectProperty rdf:ID="Disease_medicatedByTreatment">
    <rdfs:range rdf:resource="#Treatment"/>
    <rdfs:domain rdf:resource="#Disease"/>
  </owl:ObjectProperty>
  <owl:FunctionalProperty rdf:ID="Drug_hasCosts">
    <rdfs:range rdf:resource="#Costs"/>
    <rdfs:domain rdf:resource="#Drug"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Organisation_isAt">
    <rdfs:domain rdf:resource="#Organisation"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Physician_hasID">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#InverseFunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <rdfs:range rdf:resource="#PhysicianID"/>
    <rdfs:domain rdf:resource="#Physician"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Patient_hasDisease">
    <rdfs:domain rdf:resource="#Patient"/>
    <rdfs:range rdf:resource="#Disease"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Organisation_hasTelephoneNumber">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <rdfs:range rdf:resource="#TelephoneNumber"/>
    <rdfs:domain rdf:resource="#Organisation"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Person_hasName">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <rdfs:range rdf:resource="#PersonName"/>
    <rdfs:domain rdf:resource="#Person"/>
  </owl:FunctionalProperty>
  <owl:FunctionalProperty rdf:ID="Disease_hasSymptom">
    <rdfs:domain rdf:resource="#Disease"/>
    <rdfs:range rdf:resource="#Symptom"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </owl:FunctionalProperty>
</rdf:RDF>

<!-- Created with Protege (with OWL Plugin 3.3.1, Build 430)  http://protege.stanford.edu -->

我没有收到错误，但我不知道如何查询owl文件请帮助

2 个答案:

答案 0 :(得分：3)

为了便于阅读而添加换行符的查询是：

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX my: <http://127.0.0.1/ontology/ApothecaryOntology.owl#>

SELECT  ?result WHERE {
  ?result rdf:ID my:HealthInsuranceNumber .
}

当您在RDF / XML文件中看到rdf：ID时，它实际上并不是RDF三元组中的属性;相反，它用于指示RDF图中资源的IRI是什么。例如，代码段：

<owl:Class rdf:ID="Costs"/>

编码RDF三元组：

...#Costs rdf:type owl:Class

其中...是本体的基础IRI。这在RDF / XML规范的2.14 Abbreviating URIs: rdf:ID and xml:base部分中描述。该规范有点冗长而复杂，如RDF / XML。不过，RDF / XML只是RDF的序列化格式。 RDF本身非常简单。只要有可能，我建议您不要直接查看RDF图的RDF / XML序列化。相反，尝试保存为龟。它更具人性化，你可以更好地了解图中实际三元组的含义。例如，你在Turtle中的本体看起来像这样（我没有复制整件事）：

@prefix :      <http://127.0.0.1/ontology/ApothecaryOntology.owl#> .
@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl:   <http://www.w3.org/2002/07/owl#> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .

:Person  a      owl:Class .

:Patient  a              owl:Class ;
        rdfs:subClassOf  :Person .

:HospitalPhysician  a    owl:Class ;
        rdfs:subClassOf  :Physician .

:TelephoneNumber  a       owl:Class ;
        rdfs:subClassOf   :Number ;
        owl:disjointWith  :HealthInsuranceNumber .

:Physician_hasID  a  owl:FunctionalProperty , owl:InverseFunctionalProperty , owl:ObjectProperty ;
        rdfs:domain  :Physician ;
        rdfs:range   :PhysicianID .

:Disease_hasSymptom  a  owl:FunctionalProperty , owl:ObjectProperty ;
        rdfs:domain  :Disease ;
        rdfs:range   :Symptom .

这几乎与相应的SPARQL语法相同。

答案 1 :(得分：0)

检查本体和查询是否具有完全匹配的IRI。您正在搜索rdf:ID等于http://127.0.0.1/ontology/ApothecaryOntology.owl#HealthInsuranceNumber，但您的基本IRI中没有#个字符，而rdf:ID值也没有。这可能意味着文件中的值看起来像http://127.0.0.1/ontology/ApothecaryOntology.owlHealthInsuranceNumber而不是您期望的值。

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