代码我是参考网上的：
Model model = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM, null );
model.read("file:./xuexiao.owl"); // null base URI, since model URIs are absolute
// Create a new query
String queryString =
"prefix rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix rdfs:<http://www.w3.org/2000/01/rdf-schema#>
SELECT ?subject ?object
WHERE { ?subject rdfs:subClassOf ?object }";
Query query = QueryFactory.create(queryString);
// Execute the query and obtain results
QueryExecution qe = QueryExecutionFactory.create(query, model);
ResultSet results = qe.execSelect();
// Output query results
ResultSetFormatter.out(System.out, results, query);
// Important - free up resources used running the query
qe.close();
------------------------------------结果---------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------
| subject | object |
===================================================================================================================================
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Professor> | <http://www.owl-ontologies.com/Ontology1229688475.owl#Staff> |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Assistant> | <http://www.owl-ontologies.com/Ontology1229688475.owl#Staff> |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Class> | <http://www.owl-ontologies.com/Ontology1229688475.owl#teach> |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Staff> | <http://www.owl-ontologies.com/Ontology1229688475.owl#teach> |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Course> | <http://www.owl-ontologies.com/Ontology1229688475.owl#teach> |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Course> | _:b0 |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Course> | _:b1 |
----------------------------------------------------------------------------------------------------------------------
owl是：
<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns="http://www.owl-ontologies.com/Ontology1229688475.owl#"
xml:base="http://www.owl-ontologies.com/Ontology1229688475.owl">
<owl:Ontology rdf:about=""/>
<owl:Class rdf:ID="Course">
<rdfs:subClassOf>
<owl:Restriction>
<owl:allValuesFrom>
<owl:Class rdf:ID="Class"/>
</owl:allValuesFrom>
<owl:onProperty>
<owl:ObjectProperty rdf:ID="is_taught_on"/>
</owl:onProperty>
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:allValuesFrom>
<owl:Class rdf:ID="Professor"/>
</owl:allValuesFrom>
<owl:onProperty>
<owl:ObjectProperty rdf:ID="is_taught_by"/>
</owl:onProperty>
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Class rdf:ID="teach"/>
</rdfs:subClassOf>
</owl:Class>
<owl:Class rdf:ID="Staff">
<rdfs:subClassOf rdf:resource="#teach"/>
</owl:Class>
<owl:Class rdf:about="#Class">
<rdfs:subClassOf rdf:resource="#teach"/>
</owl:Class>
<owl:Class rdf:ID="Assistant">
<rdfs:subClassOf rdf:resource="#Staff"/>
</owl:Class>
<owl:Class rdf:about="#Professor">
<rdfs:subClassOf rdf:resource="#Staff"/>
</owl:Class>
<owl:ObjectProperty rdf:ID="manage">
<rdfs:domain rdf:resource="#Assistant"/>
<rdfs:range rdf:resource="#Class"/>
</owl:ObjectProperty>
<Course rdf:ID="Course_AI">
<is_taught_by>
<Professor rdf:ID="Professor_Wang"/>
</is_taught_by>
<is_taught_on>
<Class rdf:ID="Class_00"/>
</is_taught_on>
</Course>
<Class rdf:ID="Class_01"/>
<Course rdf:ID="Course_DKK">
<is_taught_by rdf:resource="#Professor_Wang"/>
<is_taught_on rdf:resource="#Class_01"/>
</Course>
<Course rdf:ID="Course_DB">
<is_taught_by>
<Professor rdf:ID="Professor_Zhao"/>
</is_taught_by>
<is_taught_on rdf:resource="#Class_01"/>
</Course>
<Class rdf:ID="Class_02"/>
<Assistant rdf:ID="Assistant_Li">
<manage rdf:resource="#Class_02"/>
</Assistant>
</rdf:RDF>
<!-- Created with Protege (with OWL Plugin 3.3.1, Build 430) http://protege.stanford.edu -->
--------------------------------------------
问题是最后两行应该是：| <http://www.owl-ontologies.com/Ontology1229688475.owl#Course> | is_taught_on only Class |
| <http://www.owl-ontologies.com/Ontology1229688475.owl#Course> | is_taught_by only Professor |
这个结果是在protege里面得到的。。但是为什么在这个算法里面就乱码了。。
各位帮忙看一下。谢谢。。
[此贴子已经被作者于2008-12-29 10:10:29编辑过]
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2008/12/28 17:47:00
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用sparql查询owl出现乱码 怎么办啊？
