HDS Structures

This Appendix describes the HDS structures used by the TRANSFORM facility.⁸There are three of these, distinguished by their HDS type:

TYPE = TRN_TRANSFORM

structures are used to hold data defining a complete (possibly multi-stage) transformation and are handled directly by user-level TRANSFORM routines.

TYPE = TRN_MODULE

structures are used to hold transformation module information which represents a simple 1-stage transformation without associated classification information. These structures are not handled directly by user-level TRANSFORM routines.

TYPE = TRN_CLASS

structures are used to hold classification information about the properties of a transformation. These structures are also not handled directly by the user-level TRANSFORM routines.

The following Sections describe these structures in detail.