UML241 — Section: 9.3.12

Instance values are depicted using the same icon as for the defining classifier. However, for parts this convenient notational convention is not defined. Allow to use the same icon as for the classifier that is the type of the part, when representing the part (modulo the namestring, which is necessarily different, as is the case with instance value also). As an example, a part that derives from an active class could then optionally be shown with the vertical side bars highlighting its active nature.