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

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There are several types of objects that are imported into your data model when importing a data dictionary, including domains, user-defined datatypes, reference values, and attachments.

Recall our definition of a domain from Chapter 6: A domain is a set of validation criteria that can be applied to more than one attribute; it provides a means of standardizing the characteristics of the attributes.

Creating a domain allows you to define the object once and then use it repeatedly by applying the domain to attributes. You construct domains as you would attributes, specifying a name, datatype properties, null status, default values and validation rules. By defining a domain, you also gain ...

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