[FYI] Intersection and Removal of Character Class

Hello.

I write a module that parses a character class
including grouping, intersection, union, and removal (subtraction),
according to Unicode Regular Expression (e.g. [A & B], [A-Z - XYZ]) 
and converts it into a regular expression in Perl.

For example, [A-Z & C-S & K-V] can be used as well as [K-S].
Well, this module cannot do such optimization
but utilizes perl regex syntax (?! ) and (?= ).

tarball
http://homepage1.nifty.com/nomenclator/perl/Unicode-Regex-Set-0.01.tar.gz

html-pod
http://homepage1.nifty.com/nomenclator/perl/Unicode-Regex-Set.html

see also (UTR #18)
http://www.unicode.org/unicode/reports/tr18/

Thank you,
SADAHIRO Tomoyuki