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Enhanced ER Model: Specialization & Constraints by 089ASHUTOSH PATI is a document available to read on EtoBox.
What is Enhanced ER Model: Specialization & Constraints about?
The document describes enhancements to the ER model including specialization, generalization, constraints on generalization/specialization, and aggregation. Specialization allows sub-groupings within an entity set. Generalization expresses commonalities between entity sets using a containment relationship. Constraints on generalization/specialization include whether membership is condition-defined or user-defined, and whether generalization is disjoint or overlapping. Aggregation allows relationships to be
- Author
- 089ASHUTOSH PATI
- Language
- EN