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UML and Data Modeling: A Reconciliation by David Hay

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This section addresses the specific differences between the data architecture described by entity/relationship models and object-oriented design as exhibited by UML models.

The only kind of class of interest in the architectural model is a collection of instances of things that Richard Barker describes as being of significance to the enterprise[19] (or to the government agency, academic area, or other domain). This sub-set of all the classes in the world consists of what are called here entity classes. As described in the last chapter, (see footnote about Dr. Chen on page12), the term entity class is an attempt to return some discipline to the vocabulary of entity/relationship modelers, as well as a gentle ...

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