auditctl se_sen & se_clr

Hey all, I'm trying to figure out how the se_sen and se_clr labels are supposed to be used with auditctl. Here is the selinux context: subj=root:staff_r:staff_t:s0-s15:c0.c255 ^ ^ ^ ^ se_user ^ se_type ^ se_role se_clr & se_sen What is the difference between se_clr and se_sen? And if you have any enlightening examples, that would be appreciated. Thanks, Mike