The Unicode collation algorithm (UCA) is an algorithm defined in Unicode Technical Report #10, which is a customizable method to produce binary keys from strings representing text in any writing system and language that can be represented with Unicode.
This data file specifies a default collation ordering.
The DUCET is customizable for different languages,[1][2] and some such customizations can be found in the Unicode Common Locale Data Repository (CLDR).
[3] An open source implementation of UCA is included with the International Components for Unicode, ICU.
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