Hi Jens,
Thank you for your elaborately answer.
So let's get to a practical example:
I'm going to develop a web application which uses qooxdoo as UI/AJAX
framework and as building system. I'm creating my own widget/class
hierarchie which inherits from qooxdoo classes. This web application
will be sold and deliverd to a customer which installs the web
application on his webservers. The customer will get the web application
as a compiled/optimized/obfuscated JavaScript file (built by the qooxdoo
build system) with additional html files and a backend (java/php/perl).
What do I need to do in order to fullfill the EPL/LGPL license of qooxdoo?
Is it enough to add something to the web applications license file like:
"This software was created using the qooxdoo AJAX framework
http://www.qooxdoo.org which is dual licenced
under the LGPL license http://www.gnu.org/licenses/lgpl.html and EPL
license http://www.eclipse.org/legal/epl-v10.html.";
Do I additionally have to supply the customer with the qooxdoo source
code or is it enough to point the customer to the qooxdoo web site where
he is able to download the code?
Jens Lautenbacher schrieb:
On Mi, 2007-02-28 at 01:11 +0100, Fabio Mino wrote:
Hi all,
i downloaded qooxdoo two weeks ago and i'm very impressed: great work
I started using it (i'm trying to convert a Visual Basic project to a web
application), but now i have a doubt: is it possibile to use qooxoo for a
commercial project?
I read the two licenses (LGPL and EPL) and if i understand well, the answer
is NO :(
The answer is YES if you met the following condition:
Your project is USING qooxdoo in its supplied form. E.g. You are doing
some webapp that uses qooxdoo classes to build up it's interface or you
are using your own UI classes that (by inheritence) depend on qooxdoo
classes. You can use qooxdoo without having the need to also change your
own source code to something like EPL, LGPL or the dual licensing
scheme. You need to supply the qooxdoo source package with you
application (or at least give your customers the possibility to get it)
- if you don't supply your webapp (because it's server based) of course
there's no need to e.g. provide some download link inside of the app -
although of course we would be happy for some mentioning of "made with
qooxdoo + link" on the about page...)
If you try to build a webapplication UI framework where you are changing
qooxdoo itself and try to sell the resulting, expanded qooxdoo, you can
still do that provided that the license you put the resulting entity
under is LGPL, EPL or the dual licenensing thing (which for most people
means that they in effect CAN'T sell it, because everybody has the right
to request the source code and give it away themself for free thereby
undermining any wish to commercially exploit it).
To reiterate in other words: Your own code and your own classes can be
used as you wish, we don't force any license on you. But changes to
qooxdoo itself MUST be supplied under the same Open Source licenses. If
you change qooxdoo by using e.g. some code that is LGPL only, you are
free to do so and use the whole of qooxdoo under the terms of the LGPL.
If you have a piece of code exclusively under the EPL you can also use
it and use the resulting entity under the terms of the EPL.
Most people who really change something in qooxdoo itself don't want to
administer their own patches or fork, but tend to be interested that
their changes go back to the main project. We have the additional
request that every code that goes into qooxdoo proper must comply to
BOTH EPL and LGPL (or be compatible with both like stuff licensed under
the BSD license) because we want the whole of qooxdoo be able to be used
under both licenses.
The reason for the complicated dual licensing thing is that we want to
give pure EPL and pure LGPL projects the possibility to use qooxdoo but
unfortunately the two licenses are (although similar in spirit)
incompatible in wording.
Hope this helps
jtl
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