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Mastering Data Modeling: A User-Driven Approach by John Carlis

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Chapter 7. Introduction to Mastering Shapes

Unrelated LDSs can look similar. You can use their similarities to make analogies between the shapes. By making analogies, you can leverage your experience with a familiar LDS into expertise about an unfamiliar one.

Definition of Shape

Compare LDS Fragments 7-1 and 7-2 describing data from unrelated endeavors.

Image

Fragment 7-1

Image

Fragment 7-2

When LDS fragments resemble each other like this, we say they have the same shape. As it turns out, there is a small set of fundamental shapes that recur ...

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