Notes
- Anchor addresses are not limited to being set by the GETMAIN command.
For example, a COPYS2R can be used to copy a fullword address of a
GETMAINed area to a REXX variable that is used as the anchor for a
subsequent COPYS2R or COPYR2S.
- There can be multiple structure (field) definitions for a GETMAINed
area; they can overlap, be nested, and used to redefine fields.
- Anchor addresses do not need to point to the beginning of a GETMAINed
area. It is important, however, that anchor addresses are within a
GETMAINed area that you own, and that any operation on them does not
exceed their boundaries.