and Bidi_Class in L<perlunicode>, but to find out about the intricacies of the
Unicode properties, refer to the Unicode standard. A good starting place is
L<$unicode_reference_url>. More information on the Perl extensions is in
-L<perlrecharclass>.
+L<perlunicode/Other Properties>.
Note that you can define your own properties; see
L<perlunicode/"User-Defined Character Properties">.
=back
-Some properties are considered obsolete, but still available. There are
-several varieties of obsolescence:
+Some properties are considered obsolete by Unicode, but still available.
+There are several varieties of obsolescence:
=over 4
=item Deprecated
An obsolete property may be deprecated, perhaps because its original intent
-has been replaced by another property or because its specification was somehow
-defective. This means that its use is strongly
+has been replaced by another property, or because its specification was
+somehow defective. This means that its use is strongly
discouraged, so much so that a warning will be issued if used, unless the
regular expression is in the scope of a C<S<no warnings 'deprecated'>>
statement. $A_bold_deprecated flags each such entry in the table, and
A few properties are accessible in Perl via various function calls only.
These are:
+
Lowercase_Mapping lc() and lcfirst()
Titlecase_Mapping ucfirst()
Uppercase_Mapping uc()