proposed ISO 639 change for "arn"

Doug Ewell doug at
Thu Dec 13 18:57:43 CET 2012

Peter Constable <petercon at microsoft dot com> wrote:

>> If 'arn' were withdrawn from ISO 639-3 and a new code element were
>> created to represent Mapudungan, then the BCP 47 effect would be to
>> deprecate (not vaporize) 'arn'. If that happened, is there some
>> reason that Windows couldn't continue to use the now-deprecated
>> 'arn'?
> My point above was that Windows would _have_ to continue to recognize
> 'arn', even if it were deprecated.

And my point was that Windows might expressly choose to keep 'arn' as
the canonical identifier, and add the new subtag as an alias for 'arn'
at some future date. This is exactly analogous to what Java does to this
day with 'iw' and 'he'.

Doug Ewell | Thornton, Colorado, USA | @DougEwell ­

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