MCS Levels and Ranges

[Brian Ginn <BGinn symark com>]

How should I interpret the following?
The MCS Level and Range are confusing me.
Or perhaps the difference between user and login is confusing me.

'semanage login -l' shows user_u has Range s0
'semanage user -l'  shows user_u has Level s0 and Range SystemLow-SystemHigh


[root rhel5 ~]# semanage login -l
 
Login Name                SELinux User              MLS/MCS Range
 
__default__               user_u                    s0
root                      root                      SystemLow-SystemHigh
[root rhel5 ~]# semanage user -l
 
                Labeling   MLS/       MLS/
SELinux User    Prefix     MCS Level  MCS Range                      SELinux Roles
 
root            user       s0         SystemLow-SystemHigh           system_r sysadm_r user_r
system_u        user       s0         SystemLow-SystemHigh           system_r
user_u          user       s0         SystemLow-SystemHigh           system_r sysadm_r user_r
[root rhel5 ~]#