EReferences

PowerDesigner models EMF EReferences as standard UML associations, but with additional properties.

For information about creating and working with associations, see Associations (OOM).

EReference property sheets contains all the standard association tabs along with the EMF tab, the properties of which are listed below:

Property	Description
Unique	Specifies that the selected role may not have duplicates.
Resolve proxies	Resolves proxies if the selected role is in another file.
Unsettable	Specifies that the selected role cannot be set.