
10.1 The Database Model Diagram Solution
Most people who have used both Object Role Modeling (ORM) and Entity
Relationship (ER) modeling prefer to use ORM for conceptual analysis, because of its
expressiveness, completeness, and flexibility. An added benefit of ORM is the auto-
matic normalization that occurs during the mapping process. However, if you prefer
working with entity relationship models, VEA allows you to bypass ORM and create
data models using ER techniques.
VEA provides two ways to create a logical database model using ER techniques. You
can create an ER (Entity Relationship) source model, or you can directly draw a logi-
cal database diagram ...