[threeten-dev] Islamic calendar variants need disambiguation

[Dan Chiba]

Thank you very much Yoshito-san.

Stephen, can the single string be "ca-islamic-cv-???"? Then all we need 
to do may be define the ???s?

Regards,
-Dan

On 1/10/2013 5:20 PM, Stephen Colebourne wrote:
> On 10 January 2013 21:04,<yoshito_umaoka at us.ibm.com>  wrote:
>> We had a discussion about this in the CLDR TC meeting.
>> Our tentative consensus is supporting calendar variations with a new
>> extension.
>>
>> Although CLDR defines two types "islamic" and "islamicc", CLDR only has
>> one set of formatting data. From formatting aspect, the difference in date
>> calculation between them is not important. Our current plan is:
>>
>> 1. Add a new extension "cv" (calendar algorithm variant - tentative).
>> 2. Investigate necessary types from experts, based on some references
>> including your ticket above.
>> 3. Deprecate "islamicc", and map to ca-islamic-cv-??? (??? will be
>> determined later).
>>
>> Note that the type value is limited to 8 characters because of BCP 47
>> definition. We also considered multi-segment calendar type like
>> islamic-umalqura as you suggested in the ticket, but it will require a
>> bunch of duplicated references in CLDR data formatting data. For this
>> reason, we are in favor of separating minor algorithm differences in a
>> separate extension.
> FWIW, I like the "cv" variant concept as it makes logical sense. It
> will be harder to integrate into JSR-310 (where our methods take a
> single String). The lookup from a Locale object will of course pose no
> problem to adapt.
>
> Stephen