ARCHIVE LOG
   [  INSTANCE 'instance_name' ]
   { { SEQUENCE integer
     | CHANGE integer
     | CURRENT [ NOSWITCH ]
     | GROUP integer
     | LOGFILE 'filename'
          [ USING BACKUP CONTROLFILE ]
     | NEXT
     | ALL
     | START
     }
     [ TO 'location' ]
   | STOP
   }