La sintaxis de una solicitud MATCH es:

MATCH FILE filename    (the OLD file) report request 
BY field1 [AS sortfield]
MORE
FILE file3
subrequest 
RUN
.
.
.
FILE filename2         (the NEW file) report request 
BY field1 [AS sortfield1]
.
.
.
[AFTER MATCH HOLD [AS filename]  matchtype]
MORE
FILE file4
subrequest 
END

donde:

matchtype

Puede ser cualquiera de las siguientes:

OLD

NEW

OLD-NOT-NEW

NEW-NOT-OLD

OLD-AND-NEW

OLD-OR-NEW

OLD-NOR-NEW