=head1 DESCRIPTION
Perl supports language-specific notions of data such as "is this a
-letter", "what is the upper-case equivalent of this letter", and "which
+letter", "what is the uppercase equivalent of this letter", and "which
of these letters comes first". These are important issues, especially
for languages other than English - but also for English: it would be
very naE<iuml>ve to think that C<A-Za-z> defines all the "letters". Perl
'E<oslash>' may be understood as C<\w> characters.
The C<LC_CTYPE> locale also provides the map used in translating
-characters between lower- and upper-case. This affects the case-mapping
+characters between lower and uppercase. This affects the case-mapping
functions - lc(), lcfirst, uc() and ucfirst(); case-mapping
interpolation with C<\l>, C<\L>, C<\u> or <\U> in double-quoted strings
and in C<s///> substitutions; and case-independent regular expression