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From Requirements to Constraints
About writing the three business requirements of a sample ER design as cardinality constraints
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Decomposition and Augmentation
About deriving implied cardinality constraints from the one that is written
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Implicit Cardinality Constraints
About the cardinality constraints a design implies without stating them
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Unified Cardinality Constraints
About interpreting cardinality constraints in UML and ER designs
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Look Here or Look Across
About interpreting cardinality constraints in UML and ER designs