You can perform two general types of overrides, which are file overrides and overrides for program device entries.
For more information about overriding file types, see Redirect files.
Overrides for program device entries let you override the attribute
of an ICF file that provides the link between the application and each of
the remote servers or devices with which your program communicates. For more
information about overrides on program device entries, see the ICF Programming book.