相同的sparql查询不适用于不同的类

时间：2014-11-20 08:28:18

标签： rdf sparql jena

我为传感器服务提供商创建了这个本体，这是一个室内传感器网络系统的模块。我的问题是，当我在我的本体上运行查询时，它给了我一些类的答案，而对于其他类，它什么也没有返回，也没有给出任何错误。例如，为了获得一个类的个体，“Device”“SensorServiceProvider”和“Information class”什么都不返回，而对于其他casses，它返回个体。我从代码中删除了一些链接。

这是本体数据：

    <?xml version="1.0"?>
    <!DOCTYPE rdf:RDF [
    <!ENTITY owl "http://www.w3.org/2002/07/owl#" >
    <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >
    <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#" >
    <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#" >
    <!ENTITY p0     
    "http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#">]>

    <rdf:RDF   
    xmlns="http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#"
     xml:base="http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
     xmlns:p0="http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <owl:Ontology   
    rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation">
        <owl:imports 

   rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation"/>
    </owl:Ontology>



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




    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#ConnectsTo    
    -->

    <owl:ObjectProperty rdf:about="&p0;ConnectsTo">
        <rdf:type rdf:resource="&owl;TransitiveProperty"/>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Implement 
    -->

    <owl:ObjectProperty rdf:about="&p0;Implement">
        <rdfs:range rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled- 
           ontology-41#Sensing"/>
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
          ontology-41#Sensor"/>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Store -->

    <owl:ObjectProperty rdf:about="&p0;Store">
        <rdfs:range rdf:resource="&p0;Information"/>
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-  
          ontology-41#SensorServiceProvider"/>
     </owl:ObjectProperty>



    <!--      
     http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#hasInformation     
      -->

    <owl:ObjectProperty rdf:about="&p0;hasInformation"/>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#initiates 
        -->

    <owl:ObjectProperty rdf:about="&p0;initiates">
        <rdfs:range rdf:resource="&p0;Management"/>
        <rdfs:domain rdf:resource="&p0;SensorSupportToolbox"/>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#manage -->

    <owl:ObjectProperty rdf:about="&p0;manage">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
            ontology-41#ContentService"/>
        <rdfs:range rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
              ontology-41#Middleware_Information"/>
        <rdfs:range rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
              ontology-41#Sensor_Information"/>
    </owl:ObjectProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#provide -- 
      >

    <owl:ObjectProperty rdf:about="&p0;provide">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
            ontology-41#SensorServiceProvider"/>
        <rdfs:range rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
            ontology-41#Services"/>
    </owl:ObjectProperty>



    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Data properties
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->




    <!-- 
     http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MiddlewareCode 
     -->

    <owl:DatatypeProperty rdf:about="&p0;MiddlewareCode">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
         ontology-41#Middleware_Information"/>
        <rdfs:range rdf:resource="&xsd;integer"/>
    </owl:DatatypeProperty>



    <!--  
       http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MiddlewareID  
       -->

    <owl:DatatypeProperty rdf:about="&p0;MiddlewareID">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
          ontology-41#Middleware_Information"/>
        <rdfs:range rdf:resource="&xsd;integer"/>
    </owl:DatatypeProperty>



    <!-- 
    http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MiddlewareRight 
     -->

    <owl:DatatypeProperty rdf:about="&p0;MiddlewareRight">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled- 
        ontology-41#Middleware_Information"/>
        <rdfs:range rdf:resource="&xsd;boolean"/>
    </owl:DatatypeProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#NodeCode -
    ->

    <owl:DatatypeProperty rdf:about="&p0;NodeCode">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
       ontology-41#Sensor_Information"/>
        <rdfs:range rdf:resource="&xsd;integer"/>
    </owl:DatatypeProperty>



    <!-- 
    http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#NodeExplain -->

    <owl:DatatypeProperty rdf:about="&p0;NodeExplain">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
          ontology-41#Sensor_Information"/>
        <rdfs:range rdf:resource="&xsd;string"/>
    </owl:DatatypeProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#NodeId -->

    <owl:DatatypeProperty rdf:about="&p0;NodeId">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
          ontology-41#Sensor_Information"/>
        <rdfs:range rdf:resource="&xsd;string"/>
    </owl:DatatypeProperty>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#NodeName -
           ->

    <owl:DatatypeProperty rdf:about="&p0;NodeName">
        <rdfs:domain rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-
            ontology-41#Sensor_Information"/>
        <rdfs:range rdf:resource="&xsd;string"/>
    </owl:DatatypeProperty>



    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Classes
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->






    <owl:Class rdf:about="&p0;Application_Server"/>




    <owl:Class rdf:about="&p0;Information"/>




    <owl:Class rdf:about="&p0;Management"/>




    <owl:Class rdf:about="&p0;MiddlewareManagement">
        <rdfs:subClassOf rdf:resource="&p0;Management"/>
    </owl:Class>





    <owl:Class rdf:about="&p0;ProviderManagement">
        <rdfs:subClassOf rdf:resource="&p0;Management"/>
    </owl:Class>





    <owl:Class rdf:about="&p0;SensorManagement">
        <rdfs:subClassOf rdf:resource="&p0;Management"/>
    </owl:Class>





    <owl:Class rdf:about="&p0;SensorMiddleware">
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&p0;ConnectsTo"/>
                <owl:someValuesFrom rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensorServiceProvider"/>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>





    <owl:Class rdf:about="&p0;SensorSupportToolbox"/>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#ContentService">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Services"/>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Device">
        <rdfs:subClassOf rdf:resource="&owl;Thing"/>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&p0;ConnectsTo"/>
                <owl:someValuesFrom rdf:resource="&p0;SensorMiddleware"/>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Middleware_Information">
        <rdfs:subClassOf rdf:resource="&p0;Information"/>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Process"/>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#ProviderService -->

    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#ProviderService">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Services"/>
    </owl:Class>   

    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensing">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Process"/>
    </owl:Class>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensingService -->

    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensingService">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Services"/>
    </owl:Class>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensing_Device -->

    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensing_Device">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Device"/>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor">
        <rdfs:subClassOf rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Device"/>
    </owl:Class>




    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensorServiceProvider">
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&p0;ConnectsTo"/>
                <owl:someValuesFrom rdf:resource="&p0;Application_Server"/>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor_Information">
        <rdfs:subClassOf rdf:resource="&p0;Information"/>
    </owl:Class>





    <owl:Class rdf:about="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Services"/>



    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Individuals
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->




    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#APPServer -->

    <owl:NamedIndividual rdf:about="&p0;APPServer">
        <rdf:type rdf:resource="&p0;Application_Server"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MW1 -->

    <owl:NamedIndividual rdf:about="&p0;MW1">
        <rdf:type rdf:resource="&p0;SensorMiddleware"/>
        <hasInformation rdf:resource="&p0;MiddlewareInfo"/>
        <ConnectsTo rdf:resource="&p0;SSP1"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MW2 -->

    <owl:NamedIndividual rdf:about="&p0;MW2">
        <rdf:type rdf:resource="&p0;SensorMiddleware"/>
        <hasInformation rdf:resource="&p0;MiddlewareInfo"/>
        <ConnectsTo rdf:resource="&p0;SSP1"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MW3 -->

    <owl:NamedIndividual rdf:about="&p0;MW3">
        <rdf:type rdf:resource="&p0;SensorMiddleware"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Management1 -->

    <owl:NamedIndividual rdf:about="&p0;Management1">
        <rdf:type rdf:resource="&p0;Management"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#MiddlewareInfo -->

    <owl:NamedIndividual rdf:about="&p0;MiddlewareInfo">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Middleware_Information"/>
        <MiddlewareCode rdf:datatype="&xsd;integer">021</MiddlewareCode>
        <MiddlewareID rdf:datatype="&xsd;integer">MW021</MiddlewareID>
        <MiddlewareRight rdf:datatype="&xsd;boolean">false</MiddlewareRight>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#SSP1 -->

    <owl:NamedIndividual rdf:about="&p0;SSP1">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensorServiceProvider"/>
        <ConnectsTo rdf:resource="&p0;APPServer"/>
        <Store rdf:resource="&p0;MiddlewareInfo"/>
        <Store rdf:resource="&p0;SensorInfo"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#SSP2 -->

    <owl:NamedIndividual rdf:about="&p0;SSP2">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#SensorServiceProvider"/>
        <Store rdf:resource="&p0;MiddlewareInfo"/>
        <Store rdf:resource="&p0;SensorInfo"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#SST1 -->

    <owl:NamedIndividual rdf:about="&p0;SST1">
        <rdf:type rdf:resource="&p0;SensorSupportToolbox"/>
        <initiates rdf:resource="&p0;Management1"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Sensor1 -->

    <owl:NamedIndividual rdf:about="&p0;Sensor1">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor"/>
        <ConnectsTo rdf:resource="&p0;MW1"/>
        <hasInformation rdf:resource="&p0;SensorInfo"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Sensor2 -->

    <owl:NamedIndividual rdf:about="&p0;Sensor2">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor"/>
        <ConnectsTo rdf:resource="&p0;MW2"/>
        <hasInformation rdf:resource="&p0;SensorInfo"/>
    </owl:NamedIndividual>



    <!-- http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#SensorInfo -->

    <owl:NamedIndividual rdf:about="&p0;SensorInfo">
        <rdf:type rdf:resource="http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor_Information"/>
        <NodeCode rdf:datatype="&xsd;integer">021</NodeCode>
        <NodeId rdf:datatype="&xsd;string">sd021</NodeId>
        <NodeName rdf:datatype="&xsd;string">sensor021</NodeName>
        <NodeExplain rdf:datatype="&xsd;string">temp</NodeExplain>
    </owl:NamedIndividual>
    </rdf:RDF>

我正在运行的查询是：

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX p0: <http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#>
SELECT ?x
WHERE {?x rdf:type p0:Information}

如果不清楚，我可以提供更多细节。

1 个答案:

答案 0 :(得分：0)

我将您的数据加载到Sesame商店并执行了一些查询以查看发生了什么。

您正在执行的查询尝试检索类http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#Information的所有实例。但是，您的数据不包含此类的实例，因此结果为空。

通过运行查询，我们可以很容易地看到这一点：

PREFIX p0: <http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#>
DESCRIBE p0:Information

给了我们这个结果：

p0:Information rdf:type owl:Class .
p0:Store rdfs:range p0:Information .
<http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Middleware_Information> rdfs:subClassOf p0:Information .
<http://www.semanticweb.org/faiza/ontologies/2014/7/untitled-ontology-41#Sensor_Information> rdfs:subClassOf p0:Information .

如您所见，没有三元组以rdf:type作为谓词，p0:Information作为对象，因此没有可用的实例。

但是，是本体中p0:Information的两个子类，它们可能有实例。你期待得到那些回来吗？这只有在您查询的商店启用了RDFS推理时才会起作用 - 默认情况下大多数三重存储都不启用。

因此，如果您想要获取子类的实例，请在您的triplestore上启用推理，或者使用以下查询：

PREFIX p0: <http://www.semanticweb.org/faiza/ontologies/2014/10/serviceproviderimplementation#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?x 
WHERE {
  ?x rdf:type/rdfs:subClassOf* p0:Information .
}

这使用属性路径来检索所有值?x，这些值通过零{或更多rdfs:subClassOf关系与p0:Information相关联。

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