TM resources: APPC descriptors

IMS defines APPC descriptors to RM at initialization or during /STA LU62DESC to maintain resource type consistency for message destinations.

IMS ensures that an APPC descriptor name is not used as a transaction, MSNAME, or LTERM name. Descriptors can be defined on multiple IMS systems as name uniqueness is not enforced.

APPC descriptor creation and deletion

At initialization or during /STA LU62DESC, IMS ignores any descriptors already defined as a transaction, MSNAME, or LTERM and issues a warning message. APPC descriptors are deleted from RM when all IMS systems that have defined the descriptor have terminated, warm or cold. Systems that do not define the descriptor do not need to terminate.