Re: [Ltru] Re: RFC 4646 production "grandfathered" considered harmful

+1

Doug Ewell wrote:
> Mark Davis <mark dot davis at icu dash project dot org> wrote:
> 
>> Although Frank has a point, I think my preferred approach would be to 
>> simply define but immediately deprecate subtags like lobjan -- that 
>> removes them from the grandfathered list. For the ABNF, we are then 
>> only left with the items that are syntactically ill-formed, which we 
>> could express with:
>>
>> grandfathered = "i-" irregularI
>>            / "sgn-" irregularSgn
>>            / irregularOther
>>
>> irregularI = "ami" / "bnn" / "default" / "enochian" / "hak" / 
>> "klingon" / "lux" / "mingo" / "navajo" / "pwn" / "tao" / "tay" / "tsu"
>> irregularSgn= "BE-fr" / "BE-nl" / "CH-de"
>> irregularOther = "en-GB-oed"
>>
>> We then have the smallest ABNF that (with the exception of duplicate 
>> singletons), describes the well-formed cases without letting anything 
>> else in.
> 
> I think creating more deprecated-at-birth subtags is a terrible idea. As 
> you showed, it doesn't even simplify the ABNF -- you still have the 
> messy "irregularOther" production.  It reduces the size of the list in 
> the ABNF, but increases the amount of trash in the Registry.
> 
> The ABNF can't cover every possible syntactical tagging rule anyway; 
> consider en-b-bbb-a-aaa.
> 
> -- 
> Doug Ewell
> Fullerton, California, USA
> http://users.adelphia.net/~dewell/
> RFC 4645  *  UTN #14
> 
> 
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-- 
Addison Phillips
Globalization Architect -- Yahoo! Inc.

Internationalization is an architecture.
It is not a feature.

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