This is Debian GNU/Linux's prepackaged version of HTML::TagSet. This
is a perl modules which provides data tables useful when dealing with
HTML.

It is currently maintained by Debian Perl Group,
previously by Kenneth J. Pronovici ,
and was originally packaged by Michael Alan Dorman .

The original sources should always be available from the Comprehensive Perl
Archive Network (CPAN):
http://search.cpan.org/dist/HTML-Tagset/

The HTML::Tree copright is as follows:

Copyright 1995-2000 Gisle Aas.
Copyright 2000-2005 Sean M. Burke.
Copyright 2005-2008 Andy Lester.

This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

Perl is distributed under your choice of the GNU General Public License or the
Artistic License. On Debian GNU/Linux systems, the complete text of the GNU
General Public License can be found in `/usr/share/common-licenses/GPL' and the
Artistic Licence in `/usr/share/common-licenses/Artistic'.