使用rdf:ID的SPARQL查询不返回任何结果 [英] SPARQL query using rdf:ID returns no results
问题描述
我有一个猫头鹰文件，我正在尝试对它进行查询，但没有得到任何结果，请有人帮助我弄清楚它并解释基本查询
I have an owl file and I am trying to run queries on it but not getting any results please some one help me to figure it out and explain basic querying
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，但是我不知道如何查询猫头鹰文件，请帮忙
I am not getting error but I dont know how to query owl file please help
推荐答案
您的查询(其中添加了换行符以提高可读性)是
Your query, with newlines added for readability, is:
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 .
}
虽然您在RDF/XML文件中看到rdf:ID，但实际上它不是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:
While you see rdf:ID in your RDF/XML file, it's not actually a property in the RDF triples; instead, it's used to indicate what the IRI of a resource in the RDF graph is. For instance, the snippet:
<owl:Class rdf:ID="Costs"/>
对RDF三元组进行编码:
encode the RDF triple:
...#Costs rdf:type owl:Class
...是本体的基本IRI.在 2.14缩写URI:rdf中对此进行了描述RDF/XML规范的:ID和xml:base .该规范有点长而复杂，例如RDF/XML.但是，RDF/XML只是RDF的序列化格式. RDF本身非常简单.只要有可能，我建议您不要直接看RDF图的RDF/XML序列化.相反，请尝试另存为Turtle.它更具人类可读性，您将对图中的三元组有一个更好的了解.例如，您在Turtle中的本体看起来像这样(我没有复制整个内容):
where the ... is the base IRI of your ontology. This is described in section 2.14 Abbreviating URIs: rdf:ID and xml:base of the RDF/XML specification. That specification is kind of long and complicated, like RDF/XML. RDF/XML is just a serialization format for RDF, though. RDF itself is pretty simple. Whenever possible, I'd advise that you don't look directly at the RDF/XML serialization of an RDF graph. Instead, try saving as Turtle. It's much more human readable, and you'll have a much better idea of what triples are actually in the graph. E.g., your ontology in Turtle looks like this (I haven't copied the whole thing):
@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 .
这与相应的SPARQL语法几乎相同.
That's almost identical to the corresponding SPARQL syntax.
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