Specials is a short Unicode block of characters allocated at the very end of the Basic Multilingual Plane, at U+FFF0–FFFF. Of these 16 code points, five have been assigned since Unicode 3.0: * U+FFF9 INTERLINEAR ANNOTATION ANCHOR, marks start of annotated text * U+FFFA INTERLINEAR ANNOTATION SEPARATOR, marks start of annotating character(s) * U+FFFB INTERLINEAR ANNOTATION TERMINATOR, marks end of annotation block * U+FFFC  OBJECT REPLACEMENT CHARACTER, placeholder in the text for another unspecified object, for example in a compound document. * U+FFFD � REPLACEMENT CHARACTER used to replace an unknown, unrecognized, or unrepresentable character * U+FFFE not a character. * U+FFFF not a character.