This is the Debian GNU/Linux version of the PGPLOT Perl module.

From LICENSE:

LICENSE INFORMATION 
-------------------

    The PGPLOT module for Perl is distributed under the same licensing
    terms as Perl itself. Please see the file "README" in the Perl
    distribution for more details.

Perl is distributed under either the Artistic licence or the GPL.

The full text of the GPL is available on Debian systems in
/usr/share/common-licenses/GPL

The full text of the Artistic Licence is available on Debian systems in
/usr/share/common-licenses/Artistic.

This package has been through multiple maintainers (for a list see
/usr/share/doc/pgperl/changelog.Debian.gz).

Current Debian specific changes are copyright (c) 1999-2002,
Stephen Zander <gibreel@debian.org>
