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Enhanced E-R Model and Business Rules

Enhanced E-R Model and Business Rules. CS263 Lecture 4. Introduction. The basic ER model was introduced in the mid 1970s Since then business relationships and business data have become more complex

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Chapter 4

Chapter 4. The Enhanced ER Model and Business Rules. Objectives. Use of supertype/subtype relationships Use of generalization and specialization techniques Specification of completeness and disjointness constraints Develop supertype/subtype hierarchies for realistic business situations

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Enhanced E-R Model and Business Rules

Chapter 4