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In a supertype / subtype structure, supertype and subtype have a 1 :M ( IsA ) relationship. All members of a supertype must be a
In a supertypesubtype structure, supertype and subtype have a :M IsA relationship. All members of a supertype must be a member of a subtype.
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Big Data Concepts, Theories, And Applications
Authors: Shui Yu, Song Guo
1st Edition
3319277634, 9783319277639
