Request to register private-use variant subtags

Gordon P. Hemsley gphemsley at
Sat Apr 7 22:25:46 CEST 2012

On Sat, Apr 7, 2012 at 3:41 PM, Michael Everson <everson at> wrote:
> On 7 Apr 2012, at 18:54, Doug Ewell wrote:
>> The solution, for unit-testing purposes, is simply to pick a subtag value that is not registered, ideally one that is unlikely ever to be registered, and optionally to verify as part of his unit test that the subtag is not registered. That was Addison's point in saying "A subtag like "qxqxqxqx" is a pretty good bet"—not as something that should be registered, but on the contrary, as something that will almost certainly never be registered.
>> Does anyone else think any action needs to be taken?
> I don't see why we should encode subtags for testing purposes. For personal use OR for corporate use.

Just so I'm clear: If it were up to you, there wouldn't be private-use
subtags for language, region, or script, either?

Gordon P. Hemsley
me at

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