How to backup controlfile with the TAG?

[oracle@wasiq ~]$ rman

Recovery Manager: Release 11.2.0.1.0 - Production on Fri Jan 10 21:23:22 2014

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RMAN> connect target /;

connected to target database: PROD (DBID=246965557)

RMAN> BACKUP CURRENT CONTROLFILE TAG = mondaypmbackup;

Starting backup at 10-JAN-14
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 10-JAN-14
channel ORA_DISK_1: finished piece 1 at 10-JAN-14
piece handle=/d01/oracle/flash_recovery_area/PROD/backupset/2014_01_10/o1_mf_ncnnf_MONDAYPMBACKUP_9f09og16_.bkp tag=MONDAYPMBACKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 10-JAN-14

RMAN>