Entity classes, that have their own database identity, mapping definition and life cycle
Value type classes that depend on entity classes. They are also called component classes
Entity Class Transformation
You can transform a class into a table. To do so you first must select the Persistent option in the Detail tab of the class property sheet. Then, you can define the persistent type in the Persistent groupbox:
Attribute Transformation
You can transform an attribute into a column. To do so you must select the Persistent option in the Detail tab of the attribute property sheet.
Identifier Transformation
Identifiers of persistent classes, which generation type is not set to Value type are transformed into table keys.
Value Type Transformation
PowerDesigner supports fine-grained persistence model. Multiple classes can be transformed into single table.