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Relation: subclass

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BinaryRelation1311 BinaryRelation 是只有在关系联系两样东西的时候 才算是真，框架理论以槽代表 BinaryRelation。^
    SymmetricRelation38一个 BinaryRelation ?REL 属于对称关系只是 当且仅当所有的 ?INST1 和 ?INST2 是 (?REL ?INST1 ?INST2) 意味着 (?REL ?INST2 ?...^
        EquivalenceRelation6一个 BinaryRelation 是等价关系如果它是 一个 ReflexiveRelation、 SymmetricRelation 和TransitiveRelation。^

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