Puzzled by document example

[c_moloney at optusnet.com.au]

Hello List
I refer to the document Samba Project
Documentation September 23 2003

Though I have it beside me and rely on it to
implement Samba for the first time, It has
suddenly let me down. Hopefully, someone here
can fill in the blanks.

On pages 80 and 81 the document gives these
examples:
1) your.kerberos.REALM
2) your.kerberos.server

Is YOUR the same thing both times? Or is it
something different each time? Is "Your" my
AD domain controller's IP address, or
computer name? Is it my primary DNS server's
IP address or computer name? Is it my
domain's name (FQDN or short form as used by
Windows). 
What means Your?
Help