WS-CF and Message Delivery Guarantees

In the WS-CAF Primer it states (p.4):

"An implementation of WS-CAF can start with WS-CTX for
simple context management, and later add WS-CF for its additional
context management features and message delivery guarantees"

Focusing on the reference to "message delivery guarantees": Does this
accurately reflect the mission(s) of WS-CF? 

It seems like this is part of the WS-RM realm. The closest (but not
really close at all) that WS-CF comes to referencing message delivery
guarantees is on p.36 of WS-CF, where the delivery of the outcome of an
activity to a parent activity is described:

"Whenever a child activity is started the parent activity registers a
Participant with it that is used to deliver the “outcome” to the
parent."

Kind Regards,
Joe Chiusano
Booz | Allen | Hamilton