It is
clear from discussion before and during the SPUD BoF that any
selective exposure of traffic metadata outside a relatively
restricted trust domain must be advisory, non-negotiated, and
declarative rather than imperative. This conclusion matches
experience with previous endpoint-to-middle and middle-to-endpoint
signaling approaches.
...
As with metadata systems, exposure of
specific elements must be carefully assessed for privacy risks and
the total of exposed elements must be so assessed.
Requires further explanation. Which other metadata systems?
Requires further explanation. Which other metadata systems?