VLFNOTE command operands (partitioned data set)

ADD
specifies that you have added a member to a partitioned data set.
DELETE
specifies that you have deleted a partitioned data set or a member of a partitioned data set.
UPDATE
specifies that you have updated a member of a partitioned data set.
DATASET | DSNAME (partitioned_data_set_name [(member_name)])
specifies the name of the partitioned data set that you changed. Include the member name if you have added, deleted or updated a member.
VOLSER(volume_serial)
specifies the volume on which the changed partitioned data set resides. If you do not include VOLSER, VLF uses the catalog to determine the volume serial where the data set resides.