IETF working group
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... IETF plenary session,
o any IETF working group or portion thereof,
o the IESG, or any member thereof on behalf of the IESG ...
... provide background information to educate and to facilitate
discussions within IETF working groups but are not intended to be
published as an RFCs.
...
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The right to produce derivative works must be granted in order for an
IETF working group to accept an IETF Contribution as a working group
...