Re: Suggested language for "mis" (Re: [Ltru] RE: ISO 639-2 decision: "mis")

Mark Davis wrote 

>That's going in the right direction, but doesn't not given enough guidance
>as to why to avoid it. My suggested language:
>
>The 'mis' (Uncoded) primary language subtag SHOULD NOT be used. According to
>ISO 639, it is used to identify linguistic content whose language is known
>but which does not *currently* have a corresponding subtag. It is thus
>intrinsically unstable -- the addition of other codes in the future can
>render its application invalid at any point without any warning -- and hence
>incompatible with the stability goals of BCP 47. It is thus always
>preferable to use other subtags: either "und" or -- with prior agreement --
>private use subtags.

What do you plan for 
afa	Afro-Asiatic (Other)
cpe	Creoles and pidgins, English-based (Other)
roa	Romance (Other)
wich are unstable too (but less than mis) ? 

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