[Linux-cluster] "Inc" column description/semnification

[Alex]

Hello,

What does it mean "Inc" column in the output of the cman_tool nodes command?

[root at rs2 ~]# cman_tool nodes
Node  Sts   Inc   Joined               Name
   1   M      8   2008-07-30 11:03:12  192.168.113.5
   2   M      4   2008-07-30 10:59:34  192.168.113.4
[root at rs2 ~]#

Can anybody tell me what represent 4 and 8 in Inc coulmn?

Reading manual (man cman_tool) i couldn't find any description. Just reference 
to it!

Regards,
Alx