This topic discusses parameter library, patch, and flag support. Parameter libraries (parmlibs) are partitioned data sets in which reside a list of commands and options that can determine an operating environment for a program such as XRC. Parmlib members provide a single method of specifying parameters for each system in a multisystem environment without having the user enter the parameters directly for each system.
Flags are diagnostic tools that perform a specific action if the triggering event occurs. Users turn these flags on and off according to their preferred response to the triggering event.
Patches are maintenance tools that provide information for temporary operation. Patches allow the user to take corrective actions, if necessary.
For additional information about Parameter libraries, refer to z/OS® MVS Initialization and Tuning Reference.