Tags and keywords
Some UseCase ownership and subject cases:
Again: just because a UseCase symbol appears inside the rectangle of a subject Classifier does not mean that it is owned by that Classifier and can only have that one Classifier as subject:
UML-2.5.1: 'UseCases need not be owned by their subject.'
UML-2.5.1: 'A UseCase may apply to any number of subjects. When a UseCase applies to a subject, it specifies a set of behaviors performed by that subject, which yields an observable result that is of value for Actors or other stakeholders of the subject.'SysML (and the MagicDraw/Cameo tools) introduce some special Blocks, some of which are good candidates as UseCase owners and/or subjects:
SysML: The «system», «subsystem», «external», «domain» and «system context» keywords are for "user defined" block Stereotypes (they are not part of core SysML); they are supported in MagicDraw/Cameo as Non-Normative Extensions.What is NOT a good idea as an owner is this beasty: