Question: is the result of adding more semantic constructs, such as entity supertypes, entity subtypes, and entity clustering to the original entity - relationship model. a
is the result of adding more semantic constructs, such as entity supertypes, entity subtypes, and entity clustering to the original entityrelationship model.
a
Specialization Hierarchy
b
Extended Entity Relationship Diagram
c
Extended Entity Relationship Model
d
Relationship Model
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