.. _license:

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Copyright and License
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The software is Copyright @ 1999-2020 The Regents of the University of California (The Regents). It is free for anybody to use, with the exception being that if you sell software that includes OpenSees source code you must obtain a license to do so from UC Berkeley, and like all software you use at your own risk. That license in all it's legal glory:

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   Copyright @ 1999-2020 The Regents of the University of California (The Regents). 
   All Rights Reserved.

   The Regents grants permission, without fee and without a written license agreement, for (a) 
   use, reproduction, modification, and distribution of this software and its documentation by 
   educational, research, and non-profit entities for noncommercial purposes only; and (b) use, 
   reproduction and modification of this software by other entities for internal purposes only. 
   The above copyright notice, this paragraph and the following three paragraphs must appear in 
   all copies and modifications of the software and/or documentation.


   Permission to incorporate this software into products for commercial distribution may be 
   obtained by contacting the University of California 
   Office of Technology Licensing 
   2150 Shattuck Avenue #510, 
   Berkeley, CA 94720-1620, 
   (510) 643-7201.

   This software program and documentation are copyrighted by The Regents of the University of 
   California. The Regents does not warrant that the operation of the program will be 
   uninterrupted or error-free. The end-user understands that the program was developed for 
   research purposes and is advised not to rely exclusively on the program for any reason.

   IN NO EVENT SHALL REGENTS 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 REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
   REGENTS GRANTS NO EXPRESS OR IMPLIED LICENSE IN ANY PATENT RIGHTS OF REGENTS BUT HAS 
   IMPLEMENTED AN  INDIVIDUAL CONTRIBUTOR LICENSE AGREEMENT FOR THE OPENSEES PROJECT AT THE 
   UNIVERISTY OF CALIFORNIA, BERKELEY TO BENEFIT THE END USER.

   REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE AND 
   ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED HEREUNDER IS PROVIDED "AS IS". REGENTS HAS 
   NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   
   Redistribution and use in source and binary forms, with or without modification, are 
   permitted provided that the following conditions are met:

   * Redistributions of source code must retain the above copyright notice, this list of 
   conditions and the following disclaimer.

   * Redistributions in binary form must reproduce the above copyright notice, this list of 
   conditions and the following disclaimer in the documentation and/or other materials provided 
   with the distribution.

   * Neither the name of the copyright holder nor the names of its contributors may be used to 
   endorse or promote products derived from this software without specific prior written 
   permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.