The parameters of the DK1EXDFN macros in the DK1TX072 module are used to modify the definitions for the user exits.
TYPE parameter:
The TYPE parameter in the DK1EXDFN macro determines whether a header (INITIAL) or an exit (ENTRY) definition will be produced.
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DK1EXDFN TYPE=INITIAL,…defines a header -
DK1EXDFN TYPE=ENTRY,…. defines an exit