[Openid-specs-ab] OpenID Connect Messages - what is a message?

[Johnny Bufu]

The topic of the OpenID Messages document is "Messages". It would be 
nice to have this term formally defined, to clarify what is and what is 
not a "Message".

Looking at the introduction of the "Messages" section there is no 
explicit definition for a message. The only reasonable assumption a 
reader can make is that all requests addressed to and responses received 
from the defined endpoints constitute "messages".

This becomes quite confusing given the statement made in section 2 
Overview that "each message may be signed and encrypted" (and similarly 
in section 6 Verification). All except the "check session" endpoint are 
defined as OAuth 2.0 endpoints, which to my knowledge do not deal with 
signed requests or responses. The tokens may be, but then are the tokens 
the "messages" this document is talking about?

Johnny