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The rule specifies that an entity instance of a supertype is allowed not to belong to any subtype. semi - specialization total specialization disjointness partial
The rule specifies that an entity instance of a supertype is allowed not to belong to any subtype.
semispecialization
total specialization
disjointness
partial specialization
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The Temple Of Django Database Performance
Authors: Andrew Brookins
1st Edition
1734303700, 978-1734303704
