Open Source Document Management System | OpenKM

by default we have to roles they are AdminRole and UserRole .
i want to add one more role in source code SuperAdminRole .
can you people tell me how to do it.
please help me.

I don't know what you've got in mind ? Consider taking a look at wiki -> administrator guide to know how add "normally" more roles http://wiki.openkm.com/index.php/Administring_users

AdminRole is the super administrator grants ? there's nothing else upper it !

If you're considering add in source code, I would like to know which is the purpose ?