Visual containment of the symbol for a UseCase in the rectangular symbol for a subject Classifier does NOT imply ownership! Packaging (ownership) of UseCases is separate from use within subjects, and a single UseCase may be used in more than one subject.

Icon class
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Note kind
ASSERTION
UML keywords
UseCase
UseCase::subject
Package
Classifier
Element::owner
Relates to
Figure D.6 - Establishing Operational Use Cases for Drive the Vehicle
UseCases - UML subject vs SysML Block
Package, Model, or SysML Block as UseCase owner
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Related snippets (extracts)
  [UML-2.5.1] A subject for a set of UseCases (sometimes called a system boundary) may be shown as a rectangle with its name in the top-left corner, with the UseCase ellipses visually located inside this rectangle.
  [UML-2.5.1] The same modeled UseCase may be visually depicted as separate ellipses within multiple subject rectangles.
  [UML-2.5.1] A UseCase specifies a set of actions performed by its subjects, which yields an observable result that is of value for one or more Actors or other stakeholders of each subject.
  [UML-2.5.1] A UseCase is shown as an ellipse, either containing the name of the UseCase or with the name of the UseCase placed below the ellipse. An optional stereotype keyword may be placed above the name.
  [UML-2.5.1] A subject for a set of UseCases (sometimes called a system boundary) may be shown as a rectangle with its name in the top-left corner, with the UseCase ellipses visually located inside this rectangle.
  [UML-2.5.1] Note also that the subject rectangle does not imply that the subject classifier owns the contained UseCases, but merely that the UseCases apply to that classifier.
  [UML-2.5.1] In particular, there is scope for confusion between a UseCase appearing visually contained in a boundary rectangle representing a Classifier that is its subject, and appearing visually contained in a compartment of a Classifier that is its owner...
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