Re: [Slim] XMPP-STOX example of use of lang attribute

["Randall Gellens" <[e-mail]>]

> Randall Gellens skrev den 2015-04-07 17:58:
>>> I wanted to follow up the XMPP chat example of using the lang attribute
>>> in SDP to understand how far from our goals it is.
>>>
>>> In chapter 6 of
>>> http://tools.ietf.org/html/draft-gellens-slim-negotiating-human-language-01
>>> there is a reference to
>>>
>>> draft-saintandre-sip-xmpp-chat-04  showing the use of the lang
>>> attribute
>>> in SDP.
>>>
>>> However, that draft is now replaced bydraft-ietf-stox-chat  and the
>>> lang
>>> attributes are deleted from the examples.
>>> http://tools.ietf.org/html/draft-ietf-stox-chat-11
>>>
>>> This does not mean that the discussion in chapter 6 would be wrong. It
>>> only means that the reference to the
>>> SIP-XMPP-CHAT interop draft is not appropriate anymore and would need
>>> to
>>> be replaced or deleted.
>>> Does anyone know a good replacement?
>> Hi Gunnar,
>>
>> The reference is only an informative example of how the current language
>> SDP attribute is misunderstood to be what we want rather than what is
>> specified in its definition.
> I mean that we cannot keep it as a reference in the draft since it is
> not included in the current STOX draft. Even if it is informational, I
> do not think it is appropriate to reference expired IETF drafts.

Yes, the reference to the expired draft should be deleted.


> Did it really not give us partially what we want and can be used as STOX
> intended, as long as we do not need directional characteristics and
> relative preference between media or absolute preference?

The problem is that the definition of the attribute is that it describes
the content and is intended for use with pre-recorded, not dynamic media.

However, one option would be just extend the current definition and say
that when used with dynamic media it is used per this draft.  I don't
really see any harm, especially given that no one seems to be using it
that way.