On Nov 20, 2007, at 8:54 AM, Robert Sparks wrote:
Yeah - that's not it - it doesn't match your assertion even.
That text says that _if_ SDP shows up in the 200, you have to
ignore it.
It doesn't say anything about it matching the 18x, and it doesn't
say anything about whether the UAS is allowed to put it in the 200
in the first place.
Btw - that passage _IS BEING USED_ to argue that it's ok, and even
_right_, to put SDP in the 200 OK since things MUST ignore it.
Apply Postel's maxim here.
Broken UAs might (and from what I hear, frequently do) ignore the
answer in the 18x, instead taking the answer from the 200. If these
answers are identical, then it works. If they aren't, then it doesn't.
Is it better to have a clearly described irrecoverable failure or a
working call?
--
Dean
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