Let’s create a validation rule for the last business rule on the list: the states in the New England region. Note that you’ll need to have a model open before this menu becomes active. For this example, we’ll use domain_example.erwin model that we created in the last chapter. If you don’t have this model available, you can download it at www.erwin.com/datamodelingmadesimple. Start by opening the Validation Rule Editor by selecting Model|Validation Rules from the Main Menu. The Validation Rule Editor is shown in Figure 11.1.

Figure 11.1 Validation Rule Editor for a Logical Model

Validation rules can be created for both ...

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