| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | /*!
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| 43 | \page opensourceedition.html
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| 44 |
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| 45 | \title Open Source Versions of Qt
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| 46 | \ingroup licensing
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| 47 | \brief Information about the license and features of the Open Source Edition.
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| 48 |
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| 49 | Free (or open source) software is software that comes with a license
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| 50 | that gives users certain rights. In particular the right to use the
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| 51 | software, to modify it, to obtain its source, and to pass it on (under
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| 52 | the same terms). Notice that the term "free" is about rights, not
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| 53 | money. The Free Software Foundation (creators of the GNU GPL) speaks
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| 54 | of free in this context as in "free speech", not as in "no cost".
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| 55 |
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| 56 | Nokia supports the free software concept by providing the Qt Open Source
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| 57 | Edition, which is licensed under the \l{GNU General Public License (GPL)}
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| 58 | (version 3) and the \l{GNU Lesser General Public License (LGPL)} (version 2.1).
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| 59 | You can use this edition of Qt to create and distribute software with licenses
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| 60 | that are compatible to these free software licenses.
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| 61 |
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| 62 | The support of open source with the Open Source Versions of Qt has enabled large
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| 63 | successful software projects like KDE to thrive, with thousands of developers
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| 64 | around the world using open source versions of Qt at no cost to themselves. With
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| 65 | the release of Qt 4, open source versions of Qt became available for Unix/X11,
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| 66 | Mac OS X, and Windows platforms.
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| 67 |
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| 68 | The Open Source Edition can be downloaded from the \l{Downloads}{Qt website}.
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| 69 |
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| 70 | Please refer to the online \l{License FAQ} for answers to frequently asked
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| 71 | questions on open source licensing and its implications.
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| 72 |
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| 73 | More information on Free and Open Source software is available online:
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| 74 |
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| 75 | \list
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| 76 | \o GNU GPL: \l http://www.gnu.org/.
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| 77 | \o Open Source licensing: \l http://www.opensource.org/.
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| 78 | \endlist
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| 79 |
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| 80 | See \l{Licensing Information} for a collection of documents about licenses
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| 81 | used in Qt.
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| 82 |
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| 83 | Information about Qt Commercial License Agreements is available
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| 84 | in the \l{Qt Licensing Overview} on the Qt website or by contacting
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| 85 | the sales department at http://qt.nokia.com/contact.
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| 86 |
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| 87 | If you are in doubt what edition of Qt is right for your project,
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| 88 | please contact
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| 89 | \l{mailto:qt-info@nokia.com}{qt-info@nokia.com}.
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| 90 |
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| 91 | */
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