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From Steve Shultz, IBM:

These pipeline stages allow shared queues, as defined by the SHAREDQS package, to be accessed via pipelines. As a result, pipeline applications can be written to easily and flexibly cross virtual machine boundaries. Thus the name, XPIPES.

XPIPES consists of 2 stages. The DISPERSE stage reads records from its primary input stream and places them on a shared queue. The COLLECT stage takes records from a shared queue and writes them to its primary output stream.

The XPIPES README file tells you how to make use of the DISPERSE and COLLECT stages.