EcmaScript i18n meeting summary (5/23/2011)

Nebojša Ćirić cira at
Mon May 23 18:03:04 PDT 2011

Jungshik Shin (Google), Mark Davis (Google), Richard Gillam (lab126 for
Addisson) and Nebojsa Ciric (Google).

Shawn, please take a look and see if there are any pain points with changes
we talked about (skeleton for number format, removal of calendar parameter
in date time format, and collation in general).

- Language matching
- Date time formatting
- Number formatting
- Collation
- Parameter handling

Language matching
- Match base language (de-DE) with supported locales.
- Keep the original extension for matched locale.
- If one of the requested locales is exact match to supported locales then
exact match should be picked.
- Order in the list breaks ties.

request [A, B], supported {A, B}, pick A, order breaks tie.
request [A, B], supported {A', B}, pick B. A' is a near perfect match.
request [A, B], supported {A', B'}, implementation dependent.

Date time formatting
- timeType - long and full values are optional.
- dateType - medium and full values are optional.
- Added link to LDML for skeleton fields description (to strawman).
- Narrow width is optional for date time symbols ('abbreviated' and 'wide'
are required).
- Calendar option removed from settings. We'll use locale
-u-ca-calendar_name to specify calendar.

Number formatting
- Do we need integer style? Probably not since decimal style can do the same
if we pass integer as a value.
- Keep pattern parameter for cases where users want strict format.
- Add skeleton to help with automatic placement of: sign, currency, percent
symbol and grouping digits.
- Added link to LDML spec for number format (to strawman).

- Drop type parameter (search/sort), and let user set sensitivity level for
- Added detailed section with parameters to strawman (numeric,
ignorePunctuation, sensitivity(base, case, accent, all, default...).
- User can specify some of the parameters in the languageID i.e. -u-kn-true.

Parameter handling
- Open issue: If parameter is not a valid type (Date, number or string) what
do we do?
- Throwing an exception is ugly since each format/constructor would have to
be enclosed in try/catch.
- Returning a default (current date, 0 or "") may lead to problems when
developer misses the error he made.
- Return undefined?

- If language id is ill formed identifier:
 - Initial well formed subtags are preserved ("und" if empty) and others are

- If language id is invalid (but well formed):
 - xy-666 - keep it and do best you can - implementation dependent.

Nebojša Ćirić
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