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$ uniprops 0x0B U+000B ‹U+000B› \N{LINE TABULATION} ... $ perl -E'say "\x0B" =~ /\s/ ?1:0;' 1
$ diff -u0 <( unichars '\s' ) <( unichars '\p{Space}' ) --- /dev/fd/63 2011-11-04 21:18:53.160681893 -0400 +++ /dev/fd/62 2011-11-04 21:18:53.160681893 -0400 @@ -2,0 +3 @@ + ---- U+000B LINE TABULATION