The current modeling for many QI-Core NotDone profile code elements is confusing to implementers and considered potentially ambiguous. Other NotDone profile specify code cardinality of 0..1 but then require a cardinality of 1..1 for referencing the notDoneValueSet. Communication, however, does not require indication that a single concept was done or not done, or that none of a group of items was not done. It only requires that the Communication modifierExtension:notDone is true and that a Communication.statusReason is valued with a concept with extensible binding to the NegationReason value set.
Please confirm that no change is required.