Extended dependencies are links between objects of a requirements model. These links help to make object relationships clearer but are not interpreted and checked by PowerDesigner, as they are meant to be used for documentation purposes only.
You can complement these links by applying stereotypes. Stereotypes can be used to define extended dependencies between objects in a requirements model.
You can type stereotypes directly in the Stereotype column of the object property sheet or select a value from the list, if you have previously defined stereotypes in an embedded or imported extended model definition (.XEM).
For more information about extended dependencies, see "Using extended dependencies" in the Objets chapter of the Core Features Guide.