||The base class inherited by all of the 'selector' classes :- filters, constraints
||Handles all of the interface connections and calls for the Resource Service
to the Engine and other services as needed, besides those that go through
||A repository of work queues belonging to a participant
||Provides resource administration capabilties to authorised participants
||The ResourceManager singleton manages all aspects of the resource perspective,
including the loading & maintenance of the org model, and overseeing the distribution
of tasks to participants.
||Manages all of the resourcing requirements and distribution strategies for one
||Maps each of a set of User-Task Privileges to a set of Participants (if any) for
one particular task.
||Convenience class that encapsulates the various work queues for a Participant and/or
Administrator - each instance representing a single queue