OWL

OWL:Web Ontology Language
OWL = RDF Schema + new constructs of better experssiveness
defining classes:




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defining Classes:Localizing global properties




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Value ConstraintsallValuesFrom
rdfs:subClassOf
owl:Restriction



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owl:someValueFrom
owl:hasValue
rdfs:subClassOf
owl:Restriction


expensive



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owl:cardinality基数
owl:min(max) cardinality
owl:unionOf
define Properties




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