How to take backup of the database with TAG?

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How to take backup of the database with TAG
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[oracle@wasiq ~]$ rman

Recovery Manager: Release 11.2.0.1.0 - Production on Mon 30 DEC 21:23:22 2013

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

RMAN> connect target /;

connected to target database: PROD (DBID=246965557)

RMAN> BACKUP DATABASE TAG='TEST BACKUP';

Starting backup at 30-DEC-13
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/d01/oracle/oradata/prod/system01.dbf
input datafile file number=00002 name=/d01/oracle/oradata/prod/sysaux01.dbf
input datafile file number=00003 name=/d01/oracle/oradata/prod/undotbs01.dbf
input datafile file number=00004 name=/d01/oracle/oradata/prod/users01.dbf
channel ORA_DISK_1: starting piece 1 at 30-DEC-13
channel ORA_DISK_1: finished piece 1 at 30-DEC-13
piece handle=/d01/oracle/flash_recovery_area/PROD/backupset/2013_12_30/o1_mf_nnndf_TEST_BACKUP_9d307to7_.bkp tag=TEST BACKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:35
Finished backup at 30-DEC-13

Starting Control File and SPFILE Autobackup at 30-DEC-13
piece handle=/d01/oracle/product/11.2.0/dbs/cfc-246965557-20131230-02 comment=NONE
Finished Control File and SPFILE Autobackup at 30-DEC-13

RMAN>