Re: [Ltru] Mail regarding draft-ietf-ltru-4646bis and draft-ietf-ltru-matching

John Cowan <> Wed, 28 August 2019 20:33 UTC

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From: John Cowan <>
Date: Wed, 28 Aug 2019 16:33:38 -0400
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To: Doug Ewell <>
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Subject: Re: [Ltru] Mail regarding draft-ietf-ltru-4646bis and draft-ietf-ltru-matching
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On Wed, Aug 28, 2019 at 12:52 PM Doug Ewell <> wrote:

"The 'Preferred-Value' field in subtag records of type "extlang" also
> contains an "extended language range".  This allows the subtag to be
> deprecated in favor of either a single primary language subtag or a new
> language-extlang sequence."

I think this means that if SIL decides to change a primary language tag
that is also an extlang tag, we can deprecate the old extlang tag as well.
Another scenario would be that they decide some language doesn't belong in
its macrolanguage, and we need to deprecate the extlang tag while leaving
the primary language tag alone.   Hopefully neither of these will ever

John Cowan
    "Any legal document draws most of its meaning from context.  A telegram
    that says 'SELL HUNDRED THOUSAND SHARES IBM SHORT' (only 190 bits in
    5-bit Baudot code plus appropriate headers) is as good a legal document
    as any, even sans digital signature." --me