[(]
{ BACKUPSET
{ { ALL | completedTimeSpec }
| primary_key [, primary_key]...
}
| DATAFILE datafileSpec [, datafileSpec]...
| DATAFILECOPY 'filename' [, 'filename']...
| DATAFILECOPY TAG [=] ['] tag_name ['] [, ['] tag_name [']]...
| TABLESPACE ['] tablespace_name ['] [, ['] tablespace_name [']]...
| DATABASE
| archivelogRecordSpecifier
| CURRENT CONTROLFILE [FOR STANDBY]
| CONTROLFILECOPY 'filename'
}
[backupSpecOperand [backupSpecOperand]...]
[)]