Subject: RE: [Simple] IM format

From: Jonathan Rosenberg <[email-masked]>
Date: Mon, 22 Oct 2001 21:13:52 -0400

> -----Original Message-----
> From: Petri K. Koskelainen [mailto:[email-masked]]
> Sent: Friday, October 12, 2001 1:51 PM
> To: [email-masked]
> Subject: [Simple] IM format
> 
> 
> Hi,
> 
> Message and thread identification is essential for 
> session based IM format as described in 
> "Group Messaging in SIP" draft.
> 
> Thread identification is not very useful in two-party chat,
> but in multi-party chat (and some non-chat applicatios)
> it is a necessity.
>
> Thread-id header itself is not needed. 
> Instead, thread identification can be achieved 
> with Message-id and References headers.
> It allows also nested threads.

Sounds like good reasons not to try and do multiparty chat with the paging
model. We have spent much time on getting multiparty communications working
with SIP. Using session model allows all of that to be reused. If you want
to support multiparty chats in page model, you will be reinventing a
completely new and orthogonal mechanisms for much the same thing. I think
that this is a bad thing.

-Jonathan R.
---
Jonathan D. Rosenberg, Ph.D.                72 Eagle Rock Ave.
Chief Scientist                             First Floor
dynamicsoft                                 East Hanover, NJ 07936
[email-masked]                     FAX:   (973) 952-5050
http://www.jdrosen.net                      PHONE: (973) 952-5000
http://www.dynamicsoft.com