NOTE: UAS and UAI are deprecated in CSM 1.5.2 and will be removed in CSM 1.6
Even though most UAIs are End-User UAIs, UAI classes make it possible to construct UAIs to serve special purposes that are not strictly end-user oriented.
One kind of special purpose UAI is the Broker UAI, which provides on demand End-User UAI launch and management. While no other specialty UAI types currently exist, other applications are expected to arise and sites are encouraged to innovate as needed.