What is the difference between Compress/2 and Transparency?
The Transparency is the MVS interface to the compression and expansion facilities, enabling these functions to be performed without changes to user programs thus compression and expansion are transparent to the applications. Compress/2 is the collection of callable routines called by the Transparency to perform compression and expansion. These may also be called directly by user programs, and this can be especially useful to support compression in certain BDAM applications, database products, and others which cannot be supported by the Transparency but which do supply user exits at I/O time.
