Re: [Sip] Re: [Simple] -05 MESSAGE and Expires header

["Vijay K. Gurbani" <vkg@lucent.com>]

Adam Roach wrote:
>>-----Original Message-----
>>From: Vijay K. Gurbani [mailto:vkg@lucent.com]
>>
>>Adam has proposed the 'Urgency' header
> 
> No, I didn't.

Okay; my apologies.  I did detect the irony, but absent a face-
to-face conversation, I wasn't sure if you were being serious or
flippant.  Glad to know we won't be making up a new header.

> I attempted to outline that what we're talking about isn't
> priority in any sense of the word.
> 
> We're talking about urgency.

If I may, I think we are imparting urgency to an IM based on the
*content* of the IM.  In other words, to use one of your examples:

> High Priority, Low Urgency:
>   Note to new residents: failure to file income taxes by April
>   15th can lead to substantial penalties.

Absence other information (like the date that this IM was sent),
urgency is meaningless.  For example, if this IM was sent on April
14th, I would think that it would be classified with high urgency.
If, OTOH, it was sent on April 16th, its urgency is extremely low.
And a relay should not be put in position to use many heuristics
for figuring out which IMs should get immediate attention.

> My argument remains that "Expires" is the most appropriate
> header for this purpose.

Right; I see I haven't convinced you yet :-)

- vijay
-- 
Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
Wireless Networks Group/Internet Software and Services
Lucent Technologies/Bell Labs Innovations, 2000 Lucent Lane, Rm 6G-440
Naperville, Illinois 60566     Voice: +1 630 224 0216


_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip