Deprecated in Perl 5.10.0
+The ticket for this feature is
+L<[perl #119313]|https://rt.perl.org/rt3/Ticket/Display.html?id=119313>.
+
=item Smart match (C<~~>)
Introduced in Perl 5.10.0
Using this feature triggers warnings in the category
C<experimental::smartmatch>.
+The ticket for this feature is
+L<[perl #119317]|https://rt.perl.org/rt3/Ticket/Display.html?id=119317>.
+
=item Lexical C<$_>
Introduced in Perl 5.10.0
Using this feature triggers warnings in the category
C<experimental::lexical_topic>.
+The ticket for this feature is
+L<[perl #119315]|https://rt.perl.org/rt3/Ticket/Display.html?id=119315>.
+
=item Pluggable keywords
+The ticket for this feature is
+L<[perl #119455]|https://rt.perl.org/rt3/Ticket/Display.html?id=119455>.
+
See L<perlapi/PL_keyword_plugin> for the mechanism.
Introduced in: Perl 5.11.2
Introduced in Perl 5.14.0
+The ticket for this feature is
+L<[perl #119437]|https://rt.perl.org/rt3/Ticket/Display.html?id=119437>.
+
=item Lexical subroutines
Introduced in: Perl 5.18
Using this feature triggers warnings in the category
C<experimental::lexical_subs>.
+The ticket for this feature is
+L<[perl #120085]|https://rt.perl.org/rt3/Ticket/Display.html?id=120085>.
+
=item Regular Expression Set Operations
Introduced in: Perl 5.18
+The ticket for this feature is
+L<[perl #119451]|https://rt.perl.org/rt3/Ticket/Display.html?id=119451>.
+
See also: L<perlrecharclass/Extended Bracketed Character Classes>
Using this feature triggers warnings in the category
Introduced in Perl 5.18
+=item Subroutine signatures
+
+Introduced in Perl 5.20.0
+
+Using this feature triggers warnings in the category
+C<experimental::signatures>.
+
+The ticket for this feature is
+L<[perl #121481]|https://rt.perl.org/Ticket/Display.html?id=121481>.
+
+=item Postfix dereference syntax
+
+Introduced in Perl 5.20.0
+
+Using this feature triggers warnings in the category
+C<experimental::postderef>.
+
+The ticket for this feature is
+L<[perl #120162]|https://rt.perl.org:443/rt3/Ticket/Display.html?id=120162>.
+
+=item Aliasing via reference
+
+Introduced in Perl 5.22.0
+
+Using this feature triggers warnings in the category
+C<experimental::refaliasing>.
+
+The ticket for this feature is
+L<[perl #122947]|https://rt.perl.org/rt3/Ticket/Display.html?id=122947>.
+
+See also: L<perlref/Assigning to References>
+
=item The <:win32> IO pseudolayer
+The ticket for this feature is
+L<[perl #119453]|https://rt.perl.org/rt3/Ticket/Display.html?id=119453>.
+
See also L<perlrun>
=item There is an C<installhtml> target in the Makefile.
-=item Unicode in Perl on EBCDIC
+The ticket for this feature is
+L<[perl #116487]|https://rt.perl.org/rt3/Ticket/Display.html?id=116487>.
-See also: L<perlre/"Special Backtracking Control Verbs">
+=item Unicode in Perl on EBCDIC
=back
=back
+=head1 SEE ALSO
+
+For a complete list of features check L<feature>.
+
=head1 AUTHORS
brian d foy C<< <brian.d.foy@gmail.com> >>