The documentation does explain it, but its task oriented to the specific step. Can't say there is a greate overview doc, but some are bits are out there. If you know the flow you can figure it out.
I've posted a number of messages in this forum that describe the 802.1x configuration steps.
I currently use AD as the LDAP repository, and authenticate domain workstations/users use 802.1x (w/o inode). There is a "computer" user to allow workstations to log in using 802.1x. vlans, access periods etc can be assigned.
I register "guest" workstations, phones and printers using mac authentication. There are serveral strategies for this.
I point my wifi controller to imc as a radius server and use the imc to pass back vlan assignments etc from the same ldap db.