Hi Ramón

On Fri, Mar 04, 2011 at 04:12:36PM +0100, Ramón Miranda wrote:
> 
> Now the license is CC3 BY SA.  but if there is some betters let me know.
> 

We (as a project) should decide what we accept.  I think we should not
accept both CC-BY and CC-BY-SA content, even if only to reduce the
confusion.  My favourite (after public domain) is CC-BY.

Here are the licences that I personally find acceptable:

Public Domain
^^^^^^^^^^^^^
Use this if you don't care at all what happens with your work. It is a sure
way to put an end to all licensing objections.  If some company decides to
pick up your work and sell it, they are allowed to do so without even
mentioning your name.  (Question: would you really care?)

- CC-0
Same effect as a simple statement, but better wording.
http://creativecommons.org/publicdomain/zero/1.0/

- WTFPL
This is such a simple statement, but worse wording.
http://en.wikipedia.org/wiki/WTFPL

CC-BY 3.0
^^^^^^^^^
This license mainly ensures that your name will be mentioned somewhere
appropriate when your work is being used.  Companies can still pick up your
work and sell it.

This license is not GPL compatible. I don't think this is a problem as long
as MyPaint is fully functional without the artwork under question.

Exceptions (like those from David Revoy) should be no problem if they only
add extra permissions.  We should be okay without those exceptions.

GPL version 2 or later
^^^^^^^^^^^^^^^^^^^^^^
This is a code license, but it's acceptable for artwork. It makes some sense
for icons and GUI elements that you can't remove without crashing mypaint. 
I'm assuming everything that was contributed to the MyPaint project without
an explicit license was meant to be covered by the GPL, because that's what
the project is saying everywhere.

Dual-License CC-BY 3.0 and GPLv2 or later
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The perfect license to avoid compatibility discussions.  You probably need a
statement like this one:

This work may be used under any of the following licenses (at your option):
- CC-BY-3.0
- GPL version 2
- Any later version of the GPL


Anyone knows what licenses other projects are accepting?

-- 
Martin Renold

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