>> It is not allowed in any other place -- in other places, RFC 6126 says >> that AE MUST NOT be 0. (There's an omission in Section 4.4.9, where it >> only says in what case AE MAY be 0; the implication is that it MUST >> NOT be 0 in other cases.)
> Hmm, maybe this should be spelled out somewhere? Could you please clarify what exactly needs to be spelled out? I have the impression that the meaning of AE 0 is spelled out pretty clearly in all three pleaces where it is allowed. The one missing bit is Updates, where it doesn't state clearly that AE 0 is only allowed for retractions, but I think it's pretty clear from context. -- Juliusz
