chickadee » srfi-14 » char-set:blank

char-set:blankconstant

Blank chars are horizontal whitespace. In Unicode, a blank character is either

  • a character with the space separator category (Zs) in the Unicode character database.
  • U+0009 Horizontal tabulation (\t control-I)

There are eighteen blank characters in Unicode 3.0:

0009HORIZONTAL TABULATION\t control-I
0020SPACEZs
00A0NO-BREAK SPACEZs
1680OGHAM SPACE MARKZs
2000EN QUADZs
2001EM QUADZs
2002EN SPACEZs
2003EM SPACEZs
2004THREE-PER-EM SPACEZs
2005FOUR-PER-EM SPACEZs
2006SIX-PER-EM SPACEZs
2007FIGURE SPACEZs
2008PUNCTUATION SPACEZs
2009THIN SPACEZs
200AHAIR SPACEZs
200BZERO WIDTH SPACEZs
202FNARROW NO-BREAK SPACEZs
3000IDEOGRAPHIC SPACEZs

The ASCII blank characters are the first two characters above -- horizontal tab and space. Latin-1 adds the no-break space.