GRAL is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GRAL is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with GRAL.  If not, see <http://www.gnu.org/licenses/>.

On Debian systems, the complete text of the GNU Lesser General Public
License version 3 can be found in /usr/share/common-licenses/LGPL-3