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UML and Data Modeling: A Reconciliation by David Hay

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What distinguishes an entity/relationship model from either a UML design model—or a database design, for that matter—is that its first purpose is to be presented to the community concerned with the domain being modeled. It may be business executives, government employees, or someone studying an intellectual domain. In short, it will be presented to human beings, most of whom have no prior experience with data models and who have little patience with things technical or technological. For this reason, aesthetics is important.

Introduction – Aesthetic Considerations

It is true, first of all, that in terms of aesthetics, UML starts at a disadvantage:

Cardinality indicates whether an instance of an entity class is associated either with one or more ...

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