Should OK response for deregister include deregistered Contacts (with expires=0)?

All,

A question on the interpretation of the text in RFC3261
section 10.3 
point 8:

8. The registrar returns a 200 (OK) response.  The response
MUST
         contain Contact header field values enumerating all
current
         bindings.  Each Contact value MUST feature an
"expires"
         parameter indicating its expiration interval chosen
by the
         registrar.  The response SHOULD include a Date
header field.

For a deregistration, does the above mean that the registrar
should (or may) include a Contact that is being
unregistered, adding 'expires=0' to reflect this?
In other words, is the deregistered Contact included in
"all current bindings"?

If not, should this say "The registrar MUST NOT include
deregistered Contacts"?

Regards,
Jeroen





_______________________________________________
Sip mailing list  https://ww
w1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementorscs.columbia.edu for questions on current
sip
Use sippingietf.org for new developments on the application of
sip

The wording does not appear to need modification.  Since the
binding no
longer exists, section 8 basically does not apply to the
binding(s)
being deregistered.


> -----Original Message-----
> From: Jeroen van Bemmel [mailto:jbemmelzonnet.nl] 
> Sent: Wednesday, November 28, 2007 4:58 PM
> To: IETF SIP List
> Subject: [Sip] Should OK response for deregister
include 
> deregistered Contacts (with expires=0)?
> 
> All,
> 
> A question on the interpretation of the text in RFC3261

> section 10.3 point 8:
> 
> 8. The registrar returns a 200 (OK) response.  The
response MUST
>          contain Contact header field values
enumerating all current
>          bindings.  Each Contact value MUST feature an
"expires"
>          parameter indicating its expiration interval
chosen by the
>          registrar.  The response SHOULD include a Date
header field.
> 
> For a deregistration, does the above mean that the
registrar 
> should (or may) include a Contact that is being
unregistered, 
> adding 'expires=0' to reflect this?
> In other words, is the deregistered Contact included in
"all 
> current bindings"?
> 
> If not, should this say "The registrar MUST NOT
include 
> deregistered Contacts"?
> 
> Regards,
> Jeroen


_______________________________________________
Sip mailing list  https://ww
w1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementorscs.columbia.edu for questions on current
sip
Use sippingietf.org for new developments on the application of
sip