Alexander Barkov gave a presentation at Heidelberg (Sept. 2007) describing now to add new collations to MySQL. This is information that should go in the Reference Manual. The manual already contains instructions for adding new character sets. However, these instructions are for MySQL 4.0, and are out of date. Thus, this task has two parts: 1) Update the adding-a-charset instructions for 4.1 and up. 2) Add the instructions for adding new collations. See also BUG#28916. Update 2008-05-22: The instructions for adding a character set have been updated for 4.1 and up: http://dev.mysql.com/doc/refman/4.1/en/adding-character-set.html http://dev.mysql.com/doc/refman/5.0/en/adding-character-set.html http://dev.mysql.com/doc/refman/5.1/en/adding-character-set.html http://dev.mysql.com/doc/refman/6.0/en/adding-character-set.html The 4.1 manual contains both the old 4.0 instructions and update 4.1 instructions. Update 2008-05-30: The manuals now contain a new section on adding new collations: http://dev.mysql.com/doc/refman/4.1/en/adding-collation.html http://dev.mysql.com/doc/refman/5.0/en/adding-collation.html http://dev.mysql.com/doc/refman/5.1/en/adding-collation.html http://dev.mysql.com/doc/refman/6.0/en/adding-collation.html This covers simple collations for 8-bit character sets an LDML-based collations for Unicode character sets. The 4.1 manual does not have instructions for adding LDML collations because that is not supported in 4.1. Also closed related BUG#28916.