Chapter 4 Extending your Models with Profiles

Extended Objects, Sub-Objects, and Links (Profile)

Extended objects, sub-objects, and links are special metaclasses (see Metaclasses (Profile)) that are designed to allow you to add completely new types of objects to your models, rather than basing them on existing PowerDesigner objects. You should use them as follows:

Extended objects – can be created anywhere
Extended sub-objects – can only be created in the property sheet of their parent object where they are defined via an extended composition (see Extended Collections and Compositions (Profile))
Extended links – can be defined to link extended objects