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diff --git a/doc/freeeditions.doc b/doc/freeeditions.doc new file mode 100644 index 000000000..de8520bfc --- /dev/null +++ b/doc/freeeditions.doc @@ -0,0 +1,77 @@ +/*! + +\page opensourceedition.html + +\title Qt Open Source Edition + +Open source software (also called "free software") is software that comes +with a license that gives users certain rights. In particular the right to +use the software, to modify it, to obtain its source, and to pass it on +(under the same terms). + +Trolltech supports the open source software concept by providing the Qt Open Source +Edition. You can use this edition of Qt to create open source software, i.e. +software that is licensed under the GNU GPL or a similarly recognized +open source license. Trolltech's support of open source with the Qt Open Source +Edition has enabled large successful software projects like KDE, to +thrive, with thousands of developers around the world using the Qt Open Source +Edition at no cost to themselves. The Qt Open Source Edition is available for +Unix/X11, Macintosh, and embedded Linux. + +The Open Source Edition can be downloaded from here: +\l http://www.trolltech.com/download/. + +It is also possible to develop commercial software using Qt, but to do +so you must buy a commercial license for the \link +commercialeditions.html Professional or Enterprise Edition\endlink. If +you buy a commercial edition of Qt you can sell your software for any +price and with any license you like. Thousands of commercial companies +use commercial editions of Qt to develop the products they sell. + +If you use the Qt Open Source Edition, there are certain licensing +conditions that the GNU GPL imposes on you, to ensure that your users +enjoy the freedoms guaranteed by the GPL. Users are entitled to: + +\list 1 +\i Run your software for any purpose. +\i Obtain and study your software's source code, and adapt it to their + needs. +\i Redistribute your software and its source code to others (under the + same terms). +\i Improve or modify your software, and release these changes to the + public. +\endlist + +These freedoms apply to all the source code for all the modules your +software is based on, regardless of whether they have been written by +you or by others. The freedoms also apply to any associated interface +definition files, and even include the scripts and control files used +to control compilation and installation of the executable; otherwise +users could not exercise their rights. + +This means that you cannot use the Qt Open Source Edition if your software +must be built with any modules that impose conditions on you that +contradict the conditions of the GNU GPL, including, but not limited +to, software patents, commercial license agreements, copyrighted +interface definitions or any sort of non-disclosure agreement. In +these circumstances you must use a commercial edition of Qt. + +See the \link faq.html FAQ \endlink for answers to frequently +asked questions on Qt Open Source Edition licensing and its implications. + +More information on open source software is available online: + +\list +\i GNU GPL: \l http://www.gnu.org/ +\i Open source licensing: \l http://www.opensource.org/ +\endlist + +Information about Qt Commercial License Agreements is available at +\l http://www.trolltech.com/pricing.html. You can also email +<a href="mailto:[email protected]">[email protected]</a>. + +If you are in doubt what edition of Qt is right for your project, +please contact +<a href="mailto:[email protected]">[email protected]</a>. + +*/ |