What is unicode policy for character encoding?
Unicode consortium has laid down certain policy regarding character encoding stability by which no character deletion or change in character name is possible only annotation update is possible 1. Once a character is encoded, it will not be moved or removed. 2. Once a character is encoded, its character name will not be changed. 3. Once a character is encoded, its canonical combining class and decomposition (either canonical or compatibility) will not be changed in a way that would affect normalization. 4. Once a character is encoded, its properties may still be changed, but not in such a way as to change the fundamental identity of the character. 5. The structure of certain property values in the Unicode character database will not be changed.
