The majority of libSBML is copyrighted as follows:

Portions of the source code comprising libSBML were copyrighted and contributed by third parties, and placed under the same LGPL 2.1 license as the rest of libSBML. The following are their copyright statements:

LibSBML 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 2.1 of the License, or any later version.

This software 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. The software and documentation provided hereunder is on an "as is" basis, and the copyright holders have no obligations to provide maintenance, support, updates, enhancements or modifications. In no event shall the copyright holders be liable to any party for direct, indirect, special, incidental or consequential damages, including lost profits, arising out of the use of this software and its documentation, even if the copyright holders have been advised of the possibility of such damage. 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 this library in the file named "COPYING.txt" included with the software distribution. A copy is also available online at the Internet address http://sbml.org/software/libsbml/COPYING.html for your convenience. You may also write to obtain a copy from the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Third-party software incorporated into both the libSBML binary and source-code distributions

LibSBML incorporates an open-source compression library written by a third party. The following is information about the copyright and distribution terms of this library:

Additional third-party software incorporated only into the libSBML source code distribution

Additional software is used to produce the documentation of libSBML. The binary distributions of libSBML do not include this software; they are only present in the source code distribution and the libSBML documentation archives.