 关于sparql查询
如何通过sparql查询获取一个类的所有子类及其属性，类与类之间的关系，如我有下面一段owl文件的一部分，如何写sparql语句，获得cool_down的所有子类，属性，及类之间的关系，谢谢各位大虾了。。。
<owl:Class rdf:ID="cool_down">
<rdfs:label>cool_down</rdfs:label>
<rdfs:subClassOf rdf:resource="#vaporize" />
<rdfs:subClassOf>
<owl:Restriction>
<owl:cardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:cardinality>
<owl:onProperty rdf:resource="#has_input" />
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#has_input" />
<owl:allValuesFrom rdf:resource="#Low-medium_temperature_liquid" />
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:cardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:cardinality>
<owl:onProperty rdf:resource="#has_output" />
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#has_output" />
<owl:allValuesFrom rdf:resource="#Low-temperature_low-pressure_steam" />
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:cardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:cardinality>
<owl:onProperty rdf:resource="#has_state" />
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#has_state" />
<owl:allValuesFrom rdf:resource="#Gas-liquid_coexistence_state" />
</owl:Restriction>
</rdfs:subClassOf>
</owl:Class>
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2009/9/10 17:31:00
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