[XBL] Inheritance chain clarification

Dear XBL experts,

This email comments on the 7 September 2006 LCWD of XBL 2.0.
In Section 4.7 "Binding inheritance", is this correct to say that a 
"base binding of the chain" is a "base binding" if the chain of binding 
is the first one attached to the element.
In other words, in the example, there is no base binding, because the 
base binding of the chains are 'c', 'c', 'd' and 'g' but 'g' implicitely 
inherits from 'd', 'd' from 'c' and 'c' from 'a'.
In this example, 'e' is the most derived binding, correct ?
Please explain the terms also using the example.

Cyril Concolato