file[.group[.account]][:nodespec],
for which a FILE command has previously been
issued. The nodespec portion is either an environment ID indicating
the location of the file or $BACK.
$BACK means that the file resides
one "hop" back toward your local system (which
may be the local system itself).
@
Signifies all formal file designators specified
in all FILE commands previously issued in this
session or job.
Description
The RESET command resets a formal file
designator to its original meaning, cancelling any FILE
command that has been issued for this formal designator earlier
in this session or job.
