Aside from the exceptions explicitly noted below in the "Other
Copyrights" sections, all files in the PLplot package may be
distributed under the following terms:

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

The text of this license is given in the file COPYING.LIB in the
distribution directory.

The intent behind distributing the vast majority of
PLplot files under the LGPL is to ensure that it
continues to evolve in a positive way, while remaining freely
distributable.  The package is considered a "library" even though there
are associated programs, such as plrender, pltek, plserver, and pltcl.
The ties between these programs and the library are so great that I
consider them as part of the library, so distribution under the terms of
the LGPL makes sense.  Software developers are allowed and encouraged to
use PLplot as an integral part of their product, even a commercial
product.  Under the conditions of the LGPL, however, the PLplot source
code must remain freely available, including any modifications you make to
it (if you distribute a program based on the modified library).  Please
read the full license for more info.

Other Copyrights
___________________________________________________________________________

The octave binding which links to the PLplot library (but not vice
versa) and the Octave examples (except for x00c.m, x20c.m, x21c.m,
x23c.m, x24c.m, x25c.m, x26c.m, x27c.m, x28c.m, x29c.m, x30c.m,
x31c.m, and x33c.m which are copyright under the default LGPL license
stated above) are copyright under the terms of the GNU General Public
License as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
___________________________________________________________________________

The startup code used in argument handling (utils/plrender.c and
src/plargs.c) is partially derived from "xterm.c" of the X11R5
distribution, and its copyright is reproduced here:

Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
___________________________________________________________________________

The documentation files are distributed under the following license terms:

               DocBook documentation for the PLplot Library

Copyright (C) 1994  Geoffrey Furnish and Maurice LeBrun
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004  Alan W. Irwin
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004  Rafael Laboissiere
Copyright (C) 2003  Joao Cardoso

License terms:

    Redistribution and use in source (XML DocBook) and "compiled" forms
    (HTML, PDF, PostScript, DVI, TeXinfo and so forth) with or without
    modification, are permitted provided that the following conditions are
    met:

       1. Redistributions of source code (XML DocBook) must retain the
          above copyright notice, this list of conditions and the following
          disclaimer as the first lines of this file unmodified.

       2. Redistributions in compiled form (transformed to other DTDs,
          converted to HTML, PDF, PostScript, and other formats) 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.

    Important: THIS DOCUMENTATION IS PROVIDED BY THE PLPLOT PROJECT "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 PLPLOT PROJECT 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 DOCUMENTATION,
    EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
___________________________________________________________________________

The files in the subdirectory data/ss contain Ordnance Survey data ©
Crown copyright and database right 2014 distributed under the Open
Government Licence available from
http://www.ordnancesurvey.co.uk/oswebsite/opendata/docs/os-opendata-licence.pdf
___________________________________________________________________________

The examples/Chloe.pgm file was created with the commands given
in examples/README.Chloe.pgm.  The examples/Chloe.pgm file is

Copyright (C) 2016 Alan W. Irwin

and is distributed under the Creative Commons Attribution-Share Alike
3.0 Unported license
<https://creativecommons.org/licenses/by-sa/3.0/deed.en> whose full
text (downloaded as of 2016-02-05) is as follows:

You are free to:

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material for any purpose,
even commercially.

The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:

Attribution — You must give appropriate credit, provide a link to the
license, and indicate if changes were made. You may do so in any
reasonable manner, but not in any way that suggests the licensor
endorses you or your use.

ShareAlike — If you remix, transform, or build upon the material, you
must distribute your contributions under the same license as the
original.

No additional restrictions — You may not apply legal terms or
technological measures that legally restrict others from doing
anything the license permits.  Notices:

You do not have to comply with the license for elements of the
material in the public domain or where your use is permitted by an
applicable exception or limitation.  No warranties are given. The
license may not give you all of the permissions necessary for your
intended use. For example, other rights such as publicity, privacy, or
moral rights may limit how you use the material.
___________________________________________________________________________

www/simplepie.inc has the following copyright notice:

 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
 * All rights reserved.
 *
 * 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 SimplePie Team 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 HOLDERS
 * AND 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.
___________________________________________________________________________

www/js/slimbox.js has the following copyright notice:

//MooTools, My Object Oriented Javascript Tools. Copyright (c) 2006-2007 Valerio Proietti, <http://mad4milk.net>, MIT Style License.
/*
        Slimbox v1.41 - The ultimate lightweight Lightbox clone
        by Christophe Beyls (http://www.digitalia.be) - MIT-style license.
        Inspired by the original Lightbox v2 by Lokesh Dhakar.
*/
___________________________________________________________________________

The www/css/style.css.in file is

Copyright (C) 2008-2016 Alan W. Irwin
Copyright (C) 2008-2016 Werner Smekal

and is distributed under the
"Creative Commons License",
<http://creativecommons.org/licenses/by-nc/2.5/>
whose full text (downloaded as of 2016-02-05) is as follows:

You are free to:

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material

The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:

Attribution — You must give appropriate credit, provide a link to the
license, and indicate if changes were made. You may do so in any
reasonable manner, but not in any way that suggests the licensor
endorses you or your use.

NonCommercial — You may not use the material for commercial purposes.

No additional restrictions — You may not apply legal terms or
technological measures that legally restrict others from doing
anything the license permits.

Notices:

You do not have to comply with the license for elements of the
material in the public domain or where your use is permitted by an
applicable exception or limitation.

No warranties are given. The license may not give you all of the
permissions necessary for your intended use. For example, other rights
such as publicity, privacy, or moral rights may limit how you use the
material.
___________________________________________________________________________

The CMake-related files

cmake/modules/FindLua.cmake
cmake/modules/FindwxWidgets.cmake
cmake/modules/language_support/cmake/CMakeAdaInformation.cmake
cmake/modules/language_support/cmake/CMakeDetermineAdaCompiler.cmake
cmake/modules/language_support/cmake/CMakeTestAdaCompiler.cmake
cmake/modules/ndp_UseQt4.cmake
cmake/test_ada/cmake/Modules/CMakeAdaInformation.cmake
cmake/test_ada/cmake/Modules/CMakeDetermineAdaCompiler.cmake
cmake/test_ada/cmake/Modules/CMakeTestAdaCompiler.cmake

were originally distributed by Kitware Inc. and were downloaded at
various epochs by PLplot developers and then further modified by us.

The CMake-related D language support files
cmake/modules/language_support/cmake/CMakeD_Copyright.txt
cmake/modules/language_support/cmake/CMakeDInformation.cmake
cmake/modules/language_support/cmake/Platform/Linux-dmd.cmake
cmake/modules/language_support/cmake/Platform/Darwin-dmd.cmake
cmake/modules/language_support/cmake/Platform/Windows-gdc.cmake
cmake/modules/language_support/cmake/Platform/Linux-gdc.cmake
cmake/modules/language_support/cmake/Platform/Windows-dmd.cmake
cmake/modules/language_support/cmake/CMakeDCompiler.cmake.in
cmake/modules/language_support/cmake/CMakeTestDCompiler.cmake
cmake/modules/language_support/cmake/CMakeDetermineDCompiler.cmake

were downloaded from Kitware Inc. by CMakeD developers Selman Ulug and
Tim Burrell <http://www.dsource.org/projects/cmaked>, substantially
modified by them, and then further downloaded from that site in 2009
by us and further modified by us.

This complete group of CMake-related files sometimes has slightly
different licensing language depending on download epoch so look at
each of the above files for the definitive source of licensing
language.  However, in all cases that language is very similar to the
modern version of the license for CMake itself which is the
OSI-approved BSD 3-clause License (see <https://cmake.org/licensing>
for further details).
___________________________________________________________________________

Any file that is explicitly marked as "public domain" is free from any
restriction on distribution.
___________________________________________________________________________