which rule restricts one entity occurrence of super class to be a member of more than one subclass?

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disjointedness constraints of conceptual database, which rule restricts one entity occurrence of super class to be a member of more than one subclass? is it disjoint rule or overlap rule. And please try to answer this question on your way

asked 14 secs ago

Redet Getachew

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which rule restricts one entity occurrence of super class to be a member of more than one subclass?