Re: [Ltru] Extended language tags (long reply)

John Cowan wrote:
> 
>>  zh-yue-Hant-HK
>>  zh-yue-Hant
>>  zh-yue
>>  zh-Hant-HK
>>  zh-Hant
>>  zh
>>  (default)
> 
> This is equivalent to what I proposed: the matching engine should note
> that "zh-yue-Hant-HK" has an extlang, and add "zh-Hant-HK" to the list
> of language ranges immediately after it.
> 
>>  yue-Hant-HK
>>  yue-Hant
>>  yue
>>  zh-Hant-HK
>>  zh-Hant
>>  zh
>>  (default)
> 
> This likewise is equivalent: if "yue-Hant-HK" is in the list, add
> "zh-Hant-HK" after it.
> 

They are equivalent *functionally*, but not equivalent in some other 
important ways. Notably: the first version uses only information 
embedded in the tags themselves. The second requires the registry. The 
first version requires code changes in the lookup algorithm. The second 
requires changes to the user's language priority list.

Addison

-- 
Addison Phillips
Globalization Architect -- Yahoo! Inc.
Chair -- W3C Internationalization Core WG

Internationalization is an architecture.
It is not a feature.

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