What is the correct format for the scheduling component of a SnapVault schedule?

A.
cnt[@day_list][@hour_list]

B.
YYYY-MM-DD

C.
Crontable format

D.
List of dates in ISO Date format

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_snapvault.1.html
http://www.geekyfacts.com/index.php?option=com_content&view=article&id=64:snapvault
snapvault snap sched [ -f ] [ -x ] [ -o options ] [ volname [ snapname [ schedule]]]
schedule is cnt[@day_list][@hour_list] or cnt[@hour_list][@day_list]
In the schedule, cnt tells SnapVault how many of the snapshots to keep for primaries and for nonSnapLocksecondary volumes. The snapshots will be numbered newest to oldest from 0 to cnt-1.
When creating a newsnapshot, SnapVault will delete the oldest snapshots, increment by one the
number on the remainingsnapshots and then create a new number 0 snapshot. If a snapshot is
missing from the sequence (e.g. sv.0,sv.1, and sv.3 exist but sv.2 does not), only snapshots that
need to be renumbered to make room for the newsv.0 snapshot will be renumbered. In the
example, sv.0 and sv.1 would be renamed to sv.1 and sv.2, but sv.3would remain unchanged.
The cnt in the schedule is interpreted differently for SnapVault secondary SnapLock volumes. For
SnapLocksecondary volumes, snapshots are created with a name that includes an encoded date
and time of when thesnapshot is created. These snapshots are never renamed and they are never
automatically deleted. Thesesnapshots may be deleted using snap delete after the retention
period of the snapshot has expired. If cnt is 0,no snapshots will be taken. If cnt is any non-zero
value, snapshots will be taken and no snapshots will beautomatically deleted.
If specified, the day_list specifies which days of the week the snapshot should be created. The
day_list is acomma-separated list of the first three letters of the day: mon, tue, wed, thu, fri, sat,
sun. The names are notcase sensitive. Day ranges such as mon-fri can also be given. The default
day_list is mon-sun, i.e. every day.
If specified, the hour_list specifies which hours of the day the snapshot should be created, on each
scheduledday. The hour_list is a comma-separated list of the hours during the day, where hours
are integers from 0 to23. Hour ranges such as 8-17 are allowed. Also, step values are allowed in
conjuction with ranges. Forexample, 0-23/2 means “every two hours”. The default hour_list is 0,
i.e. midnight on the morning of eachscheduled day.