1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** Contact: Qt Software Information ([email protected])
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5 | **
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6 | ** This file is part of the documentation of the Qt Toolkit.
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7 | **
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8 | ** $QT_BEGIN_LICENSE:LGPL$
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9 | ** Commercial Usage
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10 | ** Licensees holding valid Qt Commercial licenses may use this file in
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11 | ** accordance with the Qt Commercial License Agreement provided with the
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12 | ** Software or, alternatively, in accordance with the terms contained in
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13 | ** a written agreement between you and Nokia.
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14 | **
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15 | ** GNU Lesser General Public License Usage
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16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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17 | ** General Public License version 2.1 as published by the Free Software
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18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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19 | ** packaging of this file. Please review the following information to
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20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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22 | **
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23 | ** In addition, as a special exception, Nokia gives you certain
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24 | ** additional rights. These rights are described in the Nokia Qt LGPL
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25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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26 | ** 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 are unsure which license is appropriate for your use, please
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37 | ** contact the sales department at [email protected].
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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 | Qt Software 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 email
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85 | from \l{mailto:[email protected]}{[email protected]}.
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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:[email protected]}{[email protected]}.
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90 |
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91 | */
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