2003 April 16 This directory contains the updated data files for Version 4.0.0 of the Unicode Standard. Detailed documentation of the files constituting the Unicode Character Database (contributory data files for the standard itself) can be found in UCD.html. Note that a revision of Unihan.txt is not formally released with Unicode Version 4.0. See: http://www.unicode.org/versions/enumeratedversions.html for exact details of the definition of Version 4.0.0 of the Unicode Standard. That listing details which contributory files are new in this version and which (including Unihan.txt) are retained unchanged from prior versions of the standard.