RE: [Sip] INFO message belongs only to INVITE dialog usage?

Typically an INFO method would be part of an INVITE usage. As far as I
know the Event header is not defined for INFO. I wouldn't count on the
other end to associate the INFO request to the subscription even if you
were to include the Event header.
Basically there is no need to have INFO on a subscription usage because
all information could be passed via SUBSCRIBE and NOTIFY. Furthermore, I
have rarely seen INFO used in practice, usually used just to pass some
proprietary information.

-----Original Message-----
From: Nina Garaca [mailto:nina.garaca@zesium.com] 
Sent: Thursday, May 31, 2007 12:20 PM
To: sip@ietf.org
Subject: [Sip] INFO message belongs only to INVITE dialog usage?

Hi all,

I have read rfc2976 - The SIP INFO Method, but I haven't really 
understood that INFO message belongs only to INVITE dialog usage, which 
however draft-ietf-sipping-dialogusage-04 claims in its part 5.3:

      5.3. Matching requests to usages

   For many mid-dialog requests, identifying the usage they belong to is
   obvious.  A dialog can have at most one invite usage, so any INVITE,
   UPDATE, PRACK, ACK, CANCEL, BYE, or INFO requests belong to it.

So my, question is:
    Can INFO message  belong to other usages, besides INVITE, such are  
SUBSCRIBE  or REFER?

Thanks in advance,
Nina.

-- 
Nina Garaca
Software Development & Testing

---

"ZESIUM mobile" d.o.o.
Valentina Vodnika 8/9
21000 Novi Sad
Serbia
Tel: +381 (0)21 472 15 48
Fax: +381 (0)21 472 15 49
Mob: +381 (0)63 16 15 891
E-mail: nina.garaca@zesium.com

_______________________________________________
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

_______________________________________________
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