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UML and Data Modeling: A Reconciliation by David Hay

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Ø      In general, display attributes only in the diagram where their entity class first appears. Suppress them on all subsequent diagrams, unless they are needed to explain a particular concept. (Suppress them by coloring them white.)

1. Show Domain-Specific Entity Cases Only

As described in the last chapter, the only classes of interest to the architectural entity/relationship modeler are what are called here entity classes—that is, classes of things of significance to the business (or the domain being modeled). These may also include such things as Person, Product, and so forth. While that does also include abstract entity classes such as Project Assignment, or Party, it does not include any technological object classes like files, ...

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