{ FORMAT [=] 'format_string' [, 'format_string']... 
| CHANNEL ['] channel_id [']
| CUMULATIVE
| MAXSETSIZE [=] integer [ K | M | G ]
| FILESPERSET [=] integer
| PARMS [=] 'channel_parms'
| POOL [=] integer
| TAG [=] ['] tag_name [']
| keepOption
| SKIP { OFFLINE | READONLY | INACCESSIBLE }
| NOEXCLUDE
| PROXY [ONLY]
| VALIDATE
| FORCE
| DISKRATIO [=] integer
| NOT BACKED UP { [SINCE TIME [=] 'date_string'] | integer TIMES }
| NOCHECKSUM
| CHECK LOGICAL
| COPIES [=] integer
| DEVICE TYPE deviceSpecifier
}