This library is under the GNU Lesser General Public License (either version 3 or (at your option) any later version). See the file LGPLv3 for details (it refers to the GNU General Public License, which can be found in GPLv3) or visit <http://www.gnu.org/licenses/#LGPL>. If these terms are not acceptable to you, please contact the author at <l DOT mai AT web DOT de> to negotiate other licensing terms.