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Re: [sipcore] draft-ietf-sipcore-location-conveyance-04

"Thomson, Martin" <Martin.Thomson@andrew.com> Wed, 27 October 2010 04:05 UTC

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From: "Thomson, Martin" <Martin.Thomson@andrew.com>
To: Paul Kyzivat <pkyzivat@cisco.com>, "James M. Polk (E-mail)" <jmpolk@cisco.com>, Jon Peterson <jon.peterson@neustar.biz>
Date: Wed, 27 Oct 2010 12:06:55 +0800
Thread-Topic: [sipcore] draft-ietf-sipcore-location-conveyance-04
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Cc: SIPCORE <sipcore@ietf.org>
Subject: Re: [sipcore] draft-ietf-sipcore-location-conveyance-04
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On 2010-10-27 at 12:36:02, Paul Kyzivat wrote:
> I have never understood why the routing-param is required to be last.
> And as my examples show, its difficult/impossible to enforce this in
> ABNF.	

If "routing-allowed" is mandatory, it IS possible:

    Geolocation-header = "Geolocation" HCOLON Geolocation-value
    Geolocation-value  = [ locationValue [ COMMA locationValue ] COMMA ]
                         routing-param

It's a little strange, but it does work.  Especially if you also add text that states there can be only one GeoLocation header?

(The other thing that I find strange is the fact that there can be zero, one or two locationValue parts.  This is confusing for computer scientists who can only count: zero, one, many.)

--Martin

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