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https://wiki.eclipse.org/MDT/Papyrus/UserGuide/CSS#Stereotype_Display states the following. [quote]Limitation on selector inheritance: It is not possible to apply a style to all descendant of a given Metaclass. For example, a Behavior will not inherit styles from a Class, although a Behavior actually is a Class. [/quote] Use case: * Define a stereotype that can apply to all NamedElements * Color all Classes orange if they have that given stereotype attached. For such a use case, you have to think about all metaclasses that potentially have the stereotype applied. The workaround of using * as a selector doesn't work, because then you also color elements outside of the desired hierarchy (non-descendants of Class). The workaround to define multiple stereotypes that only apply to a part of the desired metaclass inheritance tree is awkward.
Seems this was already discussed as a part of bug #384571 (comment 8) Still valuable to track as a separate issue. Camille's comment: Metaclass inheritance (e.g. selecting abstract UML Metaclasses, such as "Element" or "StructuredClassifier") is still not supported (And requires changes in the CSS Engine, IIRC, which cannot be easily done in Papyrus yet)
