CLDR 2.0.1 is an minor release, with no new translations. It includes about 80 changes that were not ready for CLDR 2.0, including fixes for collation, number spellout, format consistency, and metazone (timezone) data. It also now provides descriptions for all of the bcp47 data items in CLDR. For more information on what else has changed since the 2.0 release, see the CLDR 2.0.1 Release Note.
Unicode CLDR is by far the largest and most extensive standard repository of locale data. This data is used by a wide spectrum of companies for their software internationalization and localization: adapting software to the conventions of different languages for such common software tasks as formatting of dates, times, time zones, numbers, and currency values; sorting text; choosing languages or countries by name; transliterating different alphabets; and many others. Unicode CLDR 2.0.1 is part of the Unicode locale data project, together with the Unicode Locale Data Markup Language (LDML: http://unicode.org/reports/tr35/). LDML is an XML format used for general interchange of locale data, such as in Microsoft's .NET.