Re: [Slim] Moving forward on draft-ietf-slim-negotiating-human-language

[Gunnar Hellström <[e-mail]>]

Den 2017-11-22 kl. 06:48, skrev Martin J. Dürst:
> On 2017/11/21 06:14, Gunnar Hellström wrote:
>> A new proposal for new text taking in latest discussion of Bernard, 
>> Paul and Brian:
>
>> -----New text------------
>> 5.4 Media, Language and Modality indications
>
>> A sign language can be identified by the existence in the IANA 
>> registry of language subtags according to BCP 47 [RFC5646] of the 
>> language subtag with the Type field "extlang" combined with the 
>> Prefix field value "sgn".
>> A specific spoken or written language can be identified by not having 
>> any such "sgn" Prefix.
>
> https://tools.ietf.org/html/rfc5646#section-3.4, point 12.C.3, 
> currently says:
>
>             3.  Sign languages SHOULD have an 'extlang' record with a
>                 'Prefix' of 'sgn'.
>
> As everybody here on this list knows, a SHOULD is not a guarantee, 
> because there might be exceptions. The fact that there currently are 
> no exceptions doesn't guarantee that there will be no exceptions in 
> the future.
<GH>Right, but a new registration of a sign language in the future 
without registering the 'sgn' Prefix for it will risk to cause interop 
problems for that language, so that should not continuously be done. And 
if it is done, it should be corrected. And while it is in the process of 
being amended in the language registry, applications supporting that 
language could regard it to be a sign language anyway by application 
agreement.
So, I think we can live with it.

Gunnar
>
> Regards,   Martin.
>
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Gunnar Hellström
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