Specials (Unicode block)
The Unicode block special ( engl. specials, U U FFFF to FFF0 ) contains special control and additional characters for the Unicode system, including control characters for comments.
The character U FFF9, U and U FFFA FFFB make it possible to insert comments into the text that are often shown on the annotated text. They make it about to mark furigana characters as such. U FFF9 passes the note to be provided with a text that U FFFA separates it from him the following note and U FFFB marks the end of the annotation.
In this block there are also the last two code points U FFFE and U FFFF level. These are known as "Not a Character" classified, because there is no Unicode characters can be encoded. This byte sequences are shared with the character U FEFF (Byte Order Mark ) to detect the byte order in UTF -16 and UTF-32 encoded text.