ExtSM The Callable Sort Module (ExtSM) is a standalone sort routine that enables you to sort and re-order data files. Its call interface enables you to take advantage of alternative sort modules that are usually faster than the default run-time system sort module and provide greater flexibility in sorting data. The main advantages provided by ExtSM are: • Use either quick sort or insertion sort techniques • Choose ascending or descending key ordering • Use an externally supplied collating sequence
