Private Use Variant Subtag
addison at lab126.com
Fri Mar 30 22:32:37 CEST 2012
There is no variant subtag that is "guaranteed" to be unassigned and yet still be syntactically valid.
Unlike the subtags based on external standards, BCP 47 didn't reserve any variant subtags for private use (because such a usage is superfluous: we have a panoply of private use mechanisms). If you want to test something, it is useful to note that most of subtags registered are at least vaguely mnemonic. A subtag like "qxqxqxqx" is a pretty good bet.
> -----Original Message-----
> From: ietf-languages-bounces at alvestrand.no [mailto:ietf-languages-
> bounces at alvestrand.no] On Behalf Of Gordon P. Hemsley
> Sent: Friday, March 30, 2012 1:20 PM
> To: Philip Newton; Mark Davis ☕
> Cc: ietf-languages at iana.org
> Subject: Re: Private Use Variant Subtag
> Mark, Phillip,
> Perhaps I wasn't clear. I'm not looking for alternatives to variant tags. I'm well
> aware of the -x- private use singleton.
> What I need is a variant tag that is guaranteed to be unassigned. One that
> matches the definition exactly:
> variant = 5*8alphanum ; registered variants
> / (DIGIT 3alphanum)
> Using -x- does not solve my problem.
> On Fri, Mar 30, 2012 at 12:58 PM, Philip Newton <philip.newton at gmail.com>
> > On Fri, Mar 30, 2012 at 18:56, Philip Newton <philip.newton at gmail.com>
> >> I must admit I'm a bit puzzled at the OP's claim that "there do not
> >> appear to be any variant subtags set aside for private use"
> > ...and I failed to see that the OP specifically talked about _variant_
> > subtags. Apologies.
> > In which case -x- is what I would have thought of, too.
> > Cheers,
> > Philip
> > --
> > Philip Newton <philip.newton at gmail.com>
> > _______________________________________________
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> Gordon P. Hemsley
> me at gphemsley.org
> http://gphemsley.org/ • http://gphemsley.org/blog/
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