If ISPVDEFA is specified,
then all current SAS variables are identified to ISPF via the SAS
VDEFINE user exit. If a VDEFINE service request is issued that has
a value that is specified automatically, then any variables that it
specifies are defined twice.
If NOISPVDEFA is in
effect, then only those variables that are passed automatically to
the VDEFINE user exit are defined.
To display information
about ISPF options, use PROC OPTIONS GROUP=ISPF.