I have a question about callout, though I suppose it's really a question
about the OPES model; why is it necessary to have a standardized callout
From what I can tell, the requirement for it seemed to pop out of figure
4 in opes-model-00. I believe that if that diagram were drawn with a
box just below the callout server, called a "OPES gateway intermediary"
(or surrogate), then that would prevent the need for a standardized
protocol. The protocol between "OPES intermediary" and "OPES gateway
intermediary" would be the primary protocol of the chain of
intermediaries, and the protocol between "OPES gateway intermediary" and
the callout server wouldn't matter; whatever it happened to be, a
gateway could be developed to bridge the two protocols.
Mark Baker, Chief Science Officer, Planetfred, Inc.
Ottawa, Ontario, CANADA. mbaker(_at_)planetfred(_dot_)com