[Fwd: [Fwd: [Sip] Few tiny issues with SDP section of bis3]]

[Flemming Andreasen <fandreas@cisco.com>]

Based on this, can we agree, that the sentence "Either an e line or p line MUST be
present." in Section B.2 should be removed, and hence there's no need to mention
"e" and "p" in the next sentence ?

-- Flemming



Colin Perkins wrote:

> It seems that any mandatory use of p= or e= is a hang over from the
> original use of SDP with SAP. I don't see that it necessarily makes
> sense with many current uses of SDP.
>
> We should clarify this in the revision of SDP, does someone want to
> suggest wording changes to the draft?
> Colin
>
> --> Rajesh Kumar writes:
> >rfc2327  annotates them with a "*" and further says: Optional items are
> >marked with a "*".
> >
> >I take this to mean that these are optional. When using it in the context
> >of SIP, this convention should be followed. Further, I believe this
> >convention has been retained in the on-going SDP work, right?
> >
> >Rajesh
> >
> >At 04:25 PM 6/13/2001 -0400, Flemming Andreasen wrote:
> >>Can somebody clarify if either an email address ("e=") or phone number
> >>("p=") MUST
> >>be present in SDP. The spec doesn't seem entirely clear on this.
> >>
> >>
> >>Thanks
> >>
> >>         Flemming
> >>
> >>
> >>Anders Kristensen wrote:
> >>
> >> > They're optional in the grammar, but the accompanying text seems
> >> > perfectly clear that one or the other must be present. Sometimes it's
> >> > more convenient to state requirements in english than BNF - doesn't mean
> >> > it's not part of the spec. I'm pretty sure that the quoted sentence is
> >> > the only reason it's required for SIP.
> >> >
> >> > Anders
> >> >
> >> > Mohsen Soroush-nejad wrote:
> >> > >
> >> > > Section 6 of RFC 2327 lists all the SDP fields. The optional
> >> > > fields are identified by "*". "e" & "p" are identified as optional....
> >> > >
> >> > > Mohsen
> >> > > -----Original Message-----
> >> > > From: Flemming Andreasen [mailto:fandreas@cisco.com]
> >> > > Sent: Wednesday, June 13, 2001 12:17 PM
> >> > > To: Anders Kristensen
> >> > > Cc: Jonathan Rosenberg; 'Cullen Jennings'; sip@ietf.org
> >> > > Subject: Re: [Sip] Few tiny issues with SDP section of bis3
> >> > >
> >> > > That's far from clear if you read it in the context it was provided in.
> >> > > Also, do
> >> > > note that both of these fields are in fact listed as optional earlier
> >> in the
> >> > > spec.
> >> > >
> >> > > -- Flemming
> >> > >
> >> > > Anders Kristensen wrote:
> >> > >
> >> > > > It's required by RFC 2327 (no idea why, though:
> >> > > >
> >> > > >    o Either an email field or a phone field must be specified.
> >> > > >      Additional email and phone fields are allowed.
> >> > > >
> >> > > > Thanks,
> >> > > > Anders
> >> > > >
> >> > > > Flemming Andreasen wrote:
> >> > > > >
> >> > > > > Jonathan Rosenberg wrote:
> >> > > > >
> >> > > > > >
> >> > > > > >
> >> > > > > > > -----Original Message-----
> >> > > > > > > From: Cullen Jennings [mailto:fluffy@cisco.com]
> >> > > > > > > Sent: Monday, June 11, 2001 3:15 PM
> >> > > > > > > To: sip@ietf.org
> >> > > > > > > Subject: [Sip] Few tiny issues with SDP section of bis3
> >> > > > > > >
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > Examples in section B don't have an e or P line in the SDP
> >> > > > > > > even though one
> >> > > > > > > them must be present.
> >> > > > > >
> >> > > > > > OK, I fixed that.
> >> > > > >
> >> > > > > Speaking of that: Why is there now a requirement in the SDP section
> >> > > stating
> >> > > > > that "Either an e line or p line MUST be present." ?
> >> > > > >
> >> > > > > -- Flemming
> >> > > > >
> >> > > > > --
> >> > > > > Flemming Andreasen
> >> > > > > Cisco Systems
> >> > > > >
> >> > > > > _______________________________________________
> >> > > > > Sip mailing list
> >> > > > > Sip@ietf.org
> >> > > > > http://www.ietf.org/mailman/listinfo/sip
> >> > >
> >> > > --
> >> > > Flemming Andreasen
> >> > > Cisco Systems
> >> > >
> >> > > _______________________________________________
> >> > > Sip mailing list
> >> > > Sip@ietf.org
> >> > > http://www.ietf.org/mailman/listinfo/sip
> >>
> >>--
> >>Flemming Andreasen
> >>Cisco Systems
> >
> >  Rajesh
> >--------------------------------------------------------
> >Rajesh Kumar
> >Cisco Voice Technology Center
> >Tel: 408-527-0811, Fax: 408-853-1101
> >Epage: mailto:rkumar@epage.cisco.com
> >------------------------------------------------ --------
> >
> >

--
Flemming Andreasen
Cisco Systems



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