Re: [Sipping] new draft version to extend Referred-By

["Dale Worley" <dworley at nortel.com>]

On Mon, 2009-03-02 at 11:12 +0200, Salvatore Loreto wrote:
> I have just submitted a new version of the draft
> http://www.ietf.org/internet-drafts/draft-loreto-sipping-3892bis-01.txt
> 
> it explains the needs for the
> Referred-By header to be extended to  to support more than one value:
> 
> In fact as explained in the draft the Referred-by header is normally set 
> to the value contained
> in the P-Asserted-Identity header field  to convey to the receiver the 
> identity of the original
> inviting sender.
> However the P-Asserted header field currently allows two URI  values and
> may be expanded in the future to carry more than two values as described 
> in :
> http://tools.ietf.org/id/draft-ietf-sipping-update-pai-09.txt

I notice that section 5 of 3982bis states "There may be one or two
Referred-By values.  If there is one value, it MUST be a sip, sips, or
tel URI.  If there are two values, one value MUST be a sip or sips URI
and the other MUST be a tel URI."  This duplicates the current
restriction on P-Asserted-Identity, which as you note may be changed
soon.  Why not change that statement to something more general, so that
3892bis doesn't need to be modified track every change to
P-Asserted-Identity, etc.?

Dale