Specialization Constraints
Disjoint/Overlapping – An entity must belong to only one subclass/it can belong to multiple subclassesTotal/Partial – An entity must belong to one of the following subclasses/it can belong to none of the subclasses.
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Specialization Constraints
Disjoint/Overlapping – An entity must belong to only one subclass/it can belong to multiple subclassesTotal/Partial – An entity must belong to one of the following subclasses/it can belong to none of the subclasses.