{ALLOW integer CORRUPTION | ARCHIVELOG TAG ['] tag_name ['] | AUXILIARY DESTINATION ' location ' | CHECK LOGICAL | DELETE ARCHIVELOG [MAXSIZE sizeSpec] | EXCLUDE FLASHBACK LOG | FROM {BACKUPSET | DATAFILECOPY} | FROM TAG ['] tag_name ['] | NOPARALLEL | NOREDO | PARALLEL [integer] | SKIP READONLY | TEST | UNDO TABLESPACE ['] tablespace_name ['] [, ['] tablespace_name [']]... | VALIDATE HEADER} [ {ALLOW integer CORRUPTION | ARCHIVELOG TAG ['] tag_name ['] | AUXILIARY DESTINATION ' location ' | CHECK LOGICAL | DELETE ARCHIVELOG [MAXSIZE sizeSpec] | EXCLUDE FLASHBACK LOG | FROM {BACKUPSET | DATAFILECOPY} | FROM TAG ['] tag_name ['] | NOPARALLEL | NOREDO | PARALLEL [integer] | SKIP READONLY | TEST | UNDO TABLESPACE ['] tablespace_name ['] [, ['] tablespace_name [']]... | VALIDATE HEADER}]...