Creating a Model
Now that we’ve gotten more comfortable with the CA ERwin Data Modeler environment by working with the eMovies model, let’s create our own model. Select File|New from the Main Menu, and the Create Model dialog appears, as shown in Figure 3.20.
Figure 3.20 Create Model Dialog
You’ll see that your first choice is to select the type of model: Logical, Physical, or Logical/Physical. We’ll go into detail about the various types of models and how they interact in Section IV, so don’t worry about that for now. For now, simply think of the logical model as the business view of your data, and the physical model the technical view. To give ...