The short-path transformer for MRO

CICS® uses a special transformer program (DFHXFX) for function shipping over MRO links.

This short-path transformer optimizes the path length involved in the construction of the terminal input/output areas (TIOA) that are sent on an MRO session for function shipping. It optimizes the path length by using a private CICS format for the transformed request, rather than the architected format defined by SNA.

CICS uses DFHXFX for shipping file control, transient data, temporary storage, and interval control (asynchronous processing) requests. It is not used for DL/I requests. The shipped request always specifies the CICS mirror transaction, CSMI. Architected process names are not used.