okular/LICENSES/LicenseRef-KDE-Accepted-GPL.txt

This library 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) at any later version that is
accepted by the membership of KDE e.V. (or its successor
approved by the membership of KDE e.V.), which shall act as a
proxy as defined in Section 14 of version 3 of the license.

This program 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 General Public License for more details.