source: trunk/doc/src/opensourceedition.qdoc@ 477

Last change on this file since 477 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.

File size: 4.1 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the documentation of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42/*!
43 \page opensourceedition.html
44
45 \title Open Source Versions of Qt
46 \ingroup licensing
47 \brief Information about the license and features of the Open Source Edition.
48
49 Free (or open source) software is software that comes with a license
50 that gives users certain rights. In particular the right to use the
51 software, to modify it, to obtain its source, and to pass it on (under
52 the same terms). Notice that the term "free" is about rights, not
53 money. The Free Software Foundation (creators of the GNU GPL) speaks
54 of free in this context as in "free speech", not as in "no cost".
55
56 Qt Software supports the free software concept by providing the Qt Open Source
57 Edition, which is licensed under the \l{GNU General Public License (GPL)}
58 (version 3) and the \l{GNU Lesser General Public License (LGPL)} (version 2.1).
59 You can use this edition of Qt to create and distribute software with licenses
60 that are compatible to these free software licenses.
61
62 The support of open source with the Open Source Versions of Qt has enabled large
63 successful software projects like KDE to thrive, with thousands of developers
64 around the world using open source versions of Qt at no cost to themselves. With
65 the release of Qt 4, open source versions of Qt became available for Unix/X11,
66 Mac OS X, and Windows platforms.
67
68 The Open Source Edition can be downloaded from the \l{Downloads}{Qt website}.
69
70 Please refer to the online \l{License FAQ} for answers to frequently asked
71 questions on open source licensing and its implications.
72
73 More information on Free and Open Source software is available online:
74
75 \list
76 \o GNU GPL: \l http://www.gnu.org/.
77 \o Open Source licensing: \l http://www.opensource.org/.
78 \endlist
79
80 See \l{Licensing Information} for a collection of documents about licenses
81 used in Qt.
82
83 Information about Qt Commercial License Agreements is available
84 in the \l{Qt Licensing Overview} on the Qt website or by email
85 from \l{mailto:[email protected]}{[email protected]}.
86
87 If you are in doubt what edition of Qt is right for your project,
88 please contact
89 \l{mailto:[email protected]}{[email protected]}.
90
91*/
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