Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I want to know the standard algorithm for converting unicode characters into lowercase as proposed by unicode.org.
Also, do most programming languages follow this proposed standard?
The basic algorithm is simply to concatenate the lowercase of each individual character (as defined by the penultimate column in UnicodeData.txt). There are also some special rules to handle multiple-character mappings (İ → i̇ with an extra COMBINING DOT ABOVE the i), conditional mappings (Σ → ς at the end of a word, but σ otherwise), and language-sensitive rules (like Turkish dotless ı).
Java does. Python implements the basic rules, but not the special rules. And C has no standardized Unicode support at all.