EAI — The "messages" associated with an EAIQueue

Document: UML Profile and Interchange Models for EAI
Section: 6.3.7 (EAIQueue)

Description:
The description of EAIQueue states that "EAIQueue has an ordered collection 'messages' of EAIMessageContent". This is stated as if it is describing an association in the metamodel, but no such association appears in the diagram in Figure 6-15. The name "messages" is also used in the OCL statement under Constraints.

Including such a "messages: association would not be appropriate in the metamodel, however, since this represents the dynamic state of the queue, not a part of the specification of the queue. The statement that an EAIQueue has an ordered collection of messages, and the constraint on its state, is part of the description of the semantics of EAIQueue, not part of the definition of the metamodel.

Recommendation:
Remove the reference to a "messages" association and remove the constraint. Instead, discuss the behavior of an EAIQueue as part of the description of its semantics.

see above