
are modeling, it is vastly preferable to facilitate a change of terms among users than to
perpetuate the confusion in a data model. However, in very large environments, it may
be impossible to resolve all homonyms, so the namespace option provides a way for the
model to accommodate the issue.
The Owner and Source database properties are specific to reverse engineering and will
be discussed in the chapter on reverse engineering. The Defining type property is only
used in Object-Relational models, which are discussed in chapter 13.
10.4 Adding Attributes to an Entity
To add attributes to the Patient entity, double click on the entity and select the