




 
The functions 
unicode-char-not-greaterp
 and 
unicode-char-not-lessp
 return true if the character 
char1
 is not greater (or for 
unicode-char-not-lessp
, not less) than the character 
char2
, similarly to 
cl:char-not-greaterp
 and 
cl:char-not-lessp
 but ignoring case using Unicode rules specified by 
style
. 
The current implementation only supports one style of comparison:
Compares characters using Unicode's simple lowercase folding rules.
LispWorks User Guide and Reference Manual - 21 Dec 2011