sentences:  For compatibility or other reasons, Unicode sometimes assigns two different code points to entities that are essentially the same character.For example, the character "Å" can be encoded as U+00C5 (standard name "LATIN CAPITAL LETTER A WITH RING ABOVE", a letter of the alphabet in Swedish and several other languages) or as U+212B ("ANGSTROM SIGN").Yet the symbol for angstrom is defined to be that Swedish letter, and most other symbols that are letters (like "V" for volt) do not have a separate code point for each usage.