{ RETENTION POLICY 
  { TO { RECOVERY WINDOW OF integer DAYS  
  | REDUNDANCY [=] integer
  | NONE
  }
  | CLEAR
}
| MAXSETSIZE 
  { TO 
    { integer [ K | M | G ]
    | UNLIMITED
    }
    | CLEAR
  }
| { ARCHIVELOG | DATAFILE }
  BACKUP COPIES FOR DEVICE TYPE deviceSpecifier
  { TO integer | CLEAR }
| BACKUP OPTIMIZATION { ON | OFF | CLEAR }
| EXCLUDE FOR TABLESPACE tablespace_name [CLEAR]
}