1--- 2title: CLDR Specifications 3--- 4 5# CLDR Specifications 6 7- [UTS #35: Unicode Locale Data Markup Language (LDML)](http://www.google.com/url?q=http%3A%2F%2Fwww.unicode.org%2Freports%2Ftr35%2F&sa=D&sntz=1&usg=AOvVaw3nQVa5S_8phVZOG1xv85Ie) is the specification of the XML format used for CLDR data, including the interpretation of the CLDR data. 8- [Definitions](https://cldr.unicode.org/index/cldr-spec/definitions) - common definitions used in CLDR 9- [Unicode Locale Extension (‘u’) for BCP 47](https://cldr.unicode.org/index/bcp47-extension) - an overview of the -u- extension 10- [CLDR Survey Tool](https://cldr.unicode.org/index/survey-tool) - how to use the Survey Tool 11- [Coverage Levels](https://www.google.com/url?q=https%3A%2F%2Fcldr.unicode.org%2Findex%2Fcldr-spec%2Fcoverage-levels&sa=D&sntz=1&usg=AOvVaw0k_LrECnZYzNCWCazI9c3c) - Detailed descriptions of the data required for a language to be considered supported at a specific level 12- [Unicode Transliteration Guidelines](https://cldr.unicode.org/index/cldr-spec/transliteration-guidelines) - how to design and use Unicode transliterators 13- [Picking the Right Language Identifier](https://cldr.unicode.org/index/cldr-spec/picking-the-right-language-code) - how to pick the right language code 14- [Collation Guidelines](https://cldr.unicode.org/index/cldr-spec/collation-guidelines) - how to construct collation rules 15- [JSON Bindings for CLDR Data](https://cldr.unicode.org/index/cldr-spec/cldr-json-bindings) 16 17