... The Document Character Set . ... A document character set is a set of abstract characters (such as the Cyrillic letter "I", the Chinese character meaning "water", etc.) and a corresponding set of integer references to those characters. ... This set is character-by-character equivalent to Unicode 2.0 ( [UNICODE] ). ... Conforming user agents must correctly map to Unicode all characters in any character encodings ("charsets") that they recognize (or they must behave as if they did). ...