backupTypeSpec | CHANNEL [=] ['] channel_id ['] | CHECK LOGICAL | COPIES [=] integer | CUMULATIVE | DEVICE TYPE [=] deviceSpecifier | DISKRATIO [=] integer | duration | fileNameConversionSpec | FILESPERSET [=] integer | FORCE | FORMAT [=] formatSpec [, formatSpec]... | forRecoveryOfSpec | FULL | INCREMENTAL LEVEL [=] integer | keepOption | MAXSETSIZE [=] sizeSpec | notBackedUpSpec | NOCHECKSUM | NOEXCLUDE | POOL [=] integer | PROXY [ONLY] | REUSE | skipSpec | TAG [=] ['] tag_name ['] | VALIDATE