>Does weiss == weiß ? You need a case folding function/method to check for this. For eg. in Perl, see the fc function - http://perldoc.perl.org/functions/fc.h

>Does weiss == weiß ? You need a case folding function/method to check for this. For eg. in Perl, see the fc function - http://perldoc.perl.org/functions/fc.html http://perldoc.perl.org/functions/fc.html fc("weiss") eq fc("weiß"); # true