This section lists functions which compare characters and strings similarly to
cl:char-equal
,
cl:string-greaterp
and so on, but which use Unicode's simple case folding rules.
There are also predicates for properties of characters in Unicode's "general category", corresponding to
cl:alpha-char-p
,
cl:both-case-p
and so on.
LispWorks User Guide and Reference Manual - 21 Dec 2011