The Unicode Consortium Discussion Forum

For an HTML version of this announcement, with links, please see:
http://unicode-inc.blogspot.com/2012/06/cldr-2102-new-t-extensions-for.html

New T Extension fields and subfields [RFC 6497] are now available for use in BCP47 and Unicode Locale/Language Identifiers. These T extensions provide for the identification of transforms that can be used for tagging content or requesting resources. The new T extension fields and subfields are defined in the following files, as part of the CLDR 21.0.2 release: [url]http://cldr.unicode.org/index/downloads/cldr-21-0-2
[/url]
* i0 - Input Method Transformations: bcp47/transform_ime.xml
* k0 - Keyboard Transformations: bcp47/transform_keyboard.xml
* m0 - Machine Translations: bcp47/transform_mt.xml
* x0 - Private Use fields: bcp47/transform_private_use.xml

For example:

* "zh-t-i0-pinyin", to indicate Chinese text generated with a pinyin input method
* "en-t-k0-dvorak", to identify a Dvorak keyboard for English
* "it-t-k0-osx-extended", to request an extended Mac keyboard for Italian

The private use subfields can be used for private agreements, such as:

* "ru-t-en-x0-mobile", to indicate a translation from English to Russian for use on a mobile device, or
* "ja-t-de-m0-und-x0-medical", to identify a machine translation from German to Japanese with a specialized dictionary for medical terms.

Related to this, there is draft keyboard layout data currently slated for CLDR 22.0: see Draft Keyboard Charts.