我最近使用protege创建了一个本体，然后使用Apache Jena Fuseki 3.8.0来查询结果。
所以.OWL文件使用MAMP在本地托管。OWL文件托管没有任何问题。
但是当我做一个简单的查询时，
PREFIX uni:<http://localhost:8888/university.owl#>
SELECT * {?Student uni:studies uni:M101}
这不会显示任何结果。什么可能导致此问题？是因为我主持了.本地 OWL 文件？还是其他问题？
如果需要，下面给出了 OWL 文件。
<rdf:RDF xmlns="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xml:base="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl">
<owl:Ontology rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl"/>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Object Properties
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#studies
-->
<owl:ObjectProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#studies">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<rdfs:range rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module"/>
</owl:ObjectProperty>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#teaches
-->
<owl:ObjectProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#teaches"/>
<!-- http://www.w3.org/2002/07/owl#topObjectProperty -->
<rdf:Description rdf:about="http://www.w3.org/2002/07/owl#topObjectProperty">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer"/>
<rdfs:range rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module"/>
</rdf:Description>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Data properties
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#first_name
-->
<owl:DatatypeProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#first_name">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person"/>
<rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
</owl:DatatypeProperty>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#last_name
-->
<owl:DatatypeProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#last_name">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person"/>
<rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
</owl:DatatypeProperty>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#staffID
-->
<owl:DatatypeProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#staffID">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer"/>
<rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#integer"/>
</owl:DatatypeProperty>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#studentID
-->
<owl:DatatypeProperty rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#studentID">
<rdfs:domain rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#integer"/>
</owl:DatatypeProperty>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Classes
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer">
<rdfs:subClassOf rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person"/>
</owl:Class>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#MobileModule
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#MobileModule">
<rdfs:subClassOf rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module"/>
</owl:Class>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module"/>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person"/>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student">
<rdfs:subClassOf rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Person"/>
</owl:Class>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#WebModule
-->
<owl:Class rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#WebModule">
<rdfs:subClassOf rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Module"/>
</owl:Class>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Individuals
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer1
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer1">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer"/>
<teaches rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M101"/>
<teaches rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M102"/>
<first_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Chris</first_name>
<last_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Brown</last_name>
<staffID rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">43532</staffID>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer2
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer2">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer"/>
<teaches rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W101"/>
<teaches rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W103"/>
<first_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Larisa</first_name>
<last_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Sherman</last_name>
<staffID rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">24214</staffID>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M101
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M101">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#MobileModule"/>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M102
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M102">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#MobileModule"/>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student1
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student1">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<studies rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M101"/>
<studies rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W101"/>
<first_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Steve</first_name>
<last_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Perera</last_name>
<studentID rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">2015062</studentID>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student2
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student2">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<studies rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M102"/>
<studies rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W103"/>
<first_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Justin</first_name>
<last_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Nience</last_name>
<studentID rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">2015063</studentID>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student3
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student3">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<studies rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#M101"/>
<first_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">John</first_name>
<last_name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Fernando</last_name>
<studentID rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">2015076</studentID>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W101
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W101">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#WebModule"/>
</owl:NamedIndividual>
<!--
http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W103
-->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#W103">
<rdf:type rdf:resource="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#WebModule"/>
</owl:NamedIndividual>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// General axioms
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<rdf:Description>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#AllDisjointClasses"/>
<owl:members rdf:parseType="Collection">
<rdf:Description rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Lecturer"/>
<rdf:Description rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#MobileModule"/>
<rdf:Description rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#Student"/>
<rdf:Description rdf:about="http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#WebModule"/>
</owl:members>
</rdf:Description>
</rdf:RDF>
<!--
Generated by the OWL API (version 4.2.8.20170104-2310) https://github.com/owlcs/owlapi
-->
根据您的门生首选项(文件>首选项(，新实体 IRI 以活动本体 URI 开头，后跟#，并以用户提供的名称结束。
因此，按如下方式声明uni前缀：
PREFIX uni: <http://www.semanticweb.org/lakindugunasekara/ontologies/2018/8/university.owl#>