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The CLucene code is split into two sections for licensing reasons. The 'Core'
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is strictly dual licensed Apache 2 and LGPL. The CLucene Contributions code
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could not be licensed under Apache because of the subcomponents it uses.
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The CLucene Core Library uses a dual license strategy for the source code.
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These licenses are the GNU Lesser General Public License (LGPL) and the Apache
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11
License (Version 2.0). Users can choose the license they wish to distribute
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13
licenses, but rather than you can choose the license which most suits your
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To rephrase this and to make it perfectly clear:
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For details of these licenses see APACHE.license and LGPL.license in the root
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of the source distribution.
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Some components of CLucene Core use other licenses. See the CLUCENE CORE SUBCOMPONENTS
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section for details. We understand that these licenses are compatible with LGPL and/or
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Apache v2, but please consult with a lawyer to be certain of this.
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To rephrase the licensing and to make it perfectly clear:
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CLucene is distributed under the GNU Lesser General Public License (LGPL)
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the Apache License, Version 2.0
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However, we are an open source project, and we encourage users to use the LGPL
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license and participate fully in the free software community. Dual licensing
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of the CLucene source code provides open and free access to the technology both
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for the GPL community and for other developers or companies that cannot use the
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However, we are an open source project, and we encourage users to participate fully
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in the free software community by contributing their code back to the project.
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Dual licensing of the CLucene source code provides open and free access to the
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technology both for the GPL community and for other developers or companies
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that cannot use the GPL license.
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You can freely modify, extend, and improve the CLucene source code. The only
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question is whether or not you must provide the source code and contribute
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79
These notices must be retained in any copies of any part of this
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80
documentation and/or software.
b'\\ No newline at end of file'
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the cmake/MacroCheckGccVisibility.cmake and MacroEnsureVersion.cmake components:
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# Copyright (c) 2006, Alexander Neundorf <neundorf@kde.org>
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# Copyright (c) 2006, Laurent Montel, <montel@kde.org>
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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the src/core/util/Compress.cpp component:
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/* zlib.h -- interface of the 'zlib' general purpose compression library
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version 1.2.3, July 18th, 2005
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Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jean-loup Gailly jloup@gzip.org
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Mark Adler madler@alumni.caltech.edu
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CLUCENE CONTRIBUTIONS CODE:
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PorterStemmer code: couldn't find license. This component is deprecated and will be removed very soon.
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Snowball code: needs to be researched.