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

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A submodel is a display of part of a data model. Submodels are used to make it easier to understand large complex data models. Someone may only be interested in seeing a subset of the model, so displaying the model in digestible pieces enhances communication. Just like we can create a folder on our computer and then add subfolders, we can create submodels within our larger model (and even submodels within submodels).

On the left side of Figure 5.1 is a typical Microsoft Windows file structure, and on the right side are ER/Studio submodels defined within a larger model. The submodel icon is a folder with a magnifying glass. Notice that in the submodel Customers, there are two nested submodels, Direct and Indirect.

Figure ...

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