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

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Precision, with respect to data modeling, means that there is a clear, unambiguous way of reading every symbol and term on the model. You might argue with others about whether the rule is accurate, but that is a different argument. In other words, it is not possible for you to view a symbol on a model and say, I see A here and for someone else to view the same symbol and respond, I see B here. In a data model, precision is primarily the result of applying a standard set of symbols. The traffic circles the gas station attendant drew for me were standard symbols that we both understood. There are also standard symbols used in data models, as we will discover shortly.

Traditionally, data models have been built during ...

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