HTML::Valid is based on HTML Tidy, which is under the following copyright:

    Copyright (c) 1998-2008 World Wide Web Consortium
    (Massachusetts Institute of Technology, European Research
    Consortium for Informatics and Mathematics, Keio University).
    All Rights Reserved.

    COPYRIGHT NOTICE:

    This software and documentation is provided "as is," and
    the copyright holders and contributing author(s) make no
    representations or warranties, express or implied, including
    but not limited to, warranties of merchantability or fitness
    for any particular purpose or that the use of the software or
    documentation will not infringe any third party patents,
    copyrights, trademarks or other rights.

    The copyright holders and contributing author(s) will not be held
    liable for any direct, indirect, special or consequential damages
    arising out of any use of the software or documentation, even if
    advised of the possibility of such damage.

    Permission is hereby granted to use, copy, modify, and distribute
    this source code, or portions hereof, documentation and executables,
    for any purpose, without fee, subject to the following restrictions:

    1. The origin of this source code must not be misrepresented.
    2. Altered versions must be plainly marked as such and must
    not be misrepresented as being the original source.
    3. This Copyright notice may not be removed or altered from any
    source or altered source distribution.

The Perl parts of this distribution are copyright (C) 2015 Ben Bullock
and may be used under either the above licence terms, or the usual
Perl conditions, either the GNU General Public Licence or the Perl
Artistic Licence.


