DSS2 — Figure 15: New State

As the statechart is now depicted, it is not clear what should happen if a federate invokes the Attribute Ownership Acquisition service for an instance attribute that is already in the "Acquisition Pending" state. The following change should be made to the statechart to indicate that the instance attribute's state shall remain unchanged: there shall be a history state added within the Acquisition Pending state, and there shall be a self-transition from this history state to itself, labeled "Attribute Ownership Acquisition".

Add the suggested history state and the suggested self-transition to figure 15.