CLDR v21 Milestone 2 available for testing

Milestone releases of CLDR provide an opportunity to test a snapshot of
the next version of CLDR; they are not intended for use in production.
CLDR v21 is not a data submission release; instead, the CLDR group is
engaged in improving tools, and making specific changes to data.

Note that the CLDR v21 release is intended to support Unicode 6.1, and
depends on some new Unicode 6.1 property values for grapheme break and
line break. This Milestone 2 release depends on values from the beta
versions of Unicode 6.1 data files.

New additions in this Milestone 2 release include:

    * Changes to the segmentation data to match Unicode 6.1. The
      behaviors associated with the former "th" grapheme break tailoring
      and "he" line break tailoring have been moved into the root
      behavior, so those tailorings are no longer necessary and have
      been deleted.
    * Two new calendar element structures needed for support of the
      Chinese lunar calendar (and other calendars such as the Hindu
      lunar calendars); for more information see
      http://cldr.unicode.org/development/development-process/design-proposals/chinese-calendar-support:
          o Addition of the <monthPatterns> element structure to
            indicate how to modify standard month names to mark
            intercalary leap months, as well as (for some
            calendars) months adjacent to leap months and combined
            months. This is supported via the standard month pattern
            characters 'M' and 'L', so the pattern character 'l' (SMALL
            LETTER L) formerly provided as a way to mark leap months has
            been deprecated (it was never supported by underlying data).
          o Addition of the <cyclicNameSets> element structure to
            support cyclic names for years (and other calendar entities
            in some calendars).
    * A new "ar_001" locale for Modern Standard Arabic as the default
      content for "ar". This will permit the "ar_EG" locale (formerly
      the default content for "ar") to use some Egypt-specific names.
    * Addition of codes for South Sudan
    * Other specific data fixes such as for Ukrainian collation, Ewe day
      periods, various metazones, and some specific translation errors.

Highlights in the Milestone 1 release (Sept. 29) included:

    * Work in support of pending -t- extension in BCP47
    * Deprecation of 'commonlyUsed' element in timezone names
    * Removal of "whole-locale" aliases (data for constructing is in
      supplementaldata.xml)
    * First cut at incorporating European Ordering Rules (EOR)

The data is available from SVN under "tag/release-21-d02" as described in

    * http://cldr.unicode.org/index/downloads#latest_draft_version

The full list of changes in this milestone is

    * http://unicode.org/cldr/trac/query?milestone=21m2

The current draft LDML specification is

    * http://unicode.org/repos/cldr/trunk/docs/web/tr35.html

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