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Data Modeling Made Simple with ER/Studio Data Architect by Steve Hoberman

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SECTION II

Data Model Objects

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This section explains all of the objects on a data model. By the end of this section, you will be able to read a data model of any size or complexity, as well as create and modify entities, attributes, and relationships in ER/Studio.

Chapter 4 defines an entity and instances and discusses the different categories of entities. The three different levels at which entities may exist, conceptual, logical, and physical, are also explained. Chapter 5 defines a submodel and how to work with submodels. Chapter 6 defines an attribute and defines keys, distinguishing the terms candidate, primary, surrogate, foreign, and alternate ...

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