Source: http://sourceforge.net/projects/xpn

Files: debian/*
Copyright: © 2008, David Paleino <d.paleino@gmail.com>
License: GPL-3+
 This package is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

Files: *
Copyright: © 2003-2008, Antonio Caputo <nemesis2001@gmx.it>
License: GPL-2+
 This package is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

On Debian systems, the complete text of the licenses con be found in:
GPL-3 - `/usr/share/common-licenses/GPL'
GPL-2 - `/usr/share/common-licenses/GPL-2'