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restontrac / trac-dev / _project / _licenses / AFFERO_GPL

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Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this license 
document, but changing it is not allowed.

Preamble

The GNU Affero General Public License is a free, copyleft license for software 
and other kinds of works, specifically designed to ensure cooperation with the 
community in the case of network server software.

The licenses for most software and other practical works are designed to take 
away your freedom to share and change the works. By contrast, our General Public 
Licenses are intended to guarantee your freedom to share and change all versions 
of a program--to make sure it remains free software for all its users.

When we speak of free software, we are referring to freedom, not price. Our 
General Public Licenses are designed to make sure that you have the freedom to 
distribute copies of free software (and charge for them if you wish), that you 
receive source code or can get it if you want it, that you can change the 
software or use pieces of it in new free programs, and that you know you can do 
these things.

Developers that use our General Public Licenses protect your rights with two 
steps: (1) assert copyright on the software, and (2) offer you this License 
which gives you legal permission to copy, distribute and/or modify the software.

A secondary benefit of defending all users' freedom is that improvements made in 
alternate versions of the program, if they receive widespread use, become 
available for other developers to incorporate. Many developers of free software 
are heartened and encouraged by the resulting cooperation. However, in the case 
of software used on network servers, this result may fail to come about. The GNU 
General Public License permits making a modified version and letting the public 
access it on a server without ever releasing its source code to the public.

The GNU Affero General Public License is designed specifically to ensure that, 
in such cases, the modified source code becomes available to the community. It 
requires the operator of a network server to provide the source code of the 
modified version running there to the users of that server. Therefore, public 
use of a modified version, on a publicly accessible server, gives the public 
access to the source code of the modified version.

An older license, called the Affero General Public License and published by 
Affero, was designed to accomplish similar goals. This is a different license, 
not a version of the Affero GPL, but Affero has released a new version of the 
Affero GPL which permits relicensing under this license.

The precise terms and conditions for copying, distribution and modification 
follow.

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Corresponding Source shall include the Corresponding Source for any work covered 
by version 3 of the GNU General Public License that is incorporated pursuant to 
the following paragraph.

Notwithstanding any other provision of this License, you have permission to link 
or combine any covered work with a work licensed under version 3 of the GNU 
General Public License into a single combined work, and to convey the resulting 
work. The terms of this License will continue to apply to the part which is the 
covered work, but the work with which it is combined will remain governed by 
version 3 of the GNU General Public License.

14. Revised Versions of this License.

The Free Software Foundation may publish revised and/or new versions of the GNU 
Affero General Public License from time to time. Such new versions will be 
similar in spirit to the present version, but may differ in detail to address 
new problems or concerns.

Each version is given a distinguishing version number. If the Program specifies 
that a certain numbered version of the GNU Affero General Public License "or any 
later version" applies to it, you have the option of following the terms and 
conditions either of that numbered version or of any later version published by 
the Free Software Foundation. If the Program does not specify a version number 
of the GNU Affero General Public License, you may choose any version ever 
published by the Free Software Foundation.

If the Program specifies that a proxy can decide which future versions of the 
GNU Affero General Public License can be used, that proxy's public statement of 
acceptance of a version permanently authorizes you to choose that version for 
the Program.

Later license versions may give you additional or different permissions. 
However, no additional obligations are imposed on any author or copyright holder 
as a result of your choosing to follow a later version.

15. Disclaimer of Warranty.

THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER 
PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER 
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE 
QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE 
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

16. Limitation of Liability.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY 
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS 
PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, 
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE 
THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 
INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE 
PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY 
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

17. Interpretation of Sections 15 and 16.

If the disclaimer of warranty and limitation of liability provided above cannot 
be given local legal effect according to their terms, reviewing courts shall 
apply local law that most closely approximates an absolute waiver of all civil 
liability in connection with the Program, unless a warranty or assumption of 
liability accompanies a copy of the Program in return for a fee.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible use 
to the public, the best way to achieve this is to make it free software which 
everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest to attach 
them to the start of each source file to most effectively state the exclusion of 
warranty; and each file should have at least the "copyright" line and a pointer 
to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If your software can interact with users remotely through a computer network, 
you should also make sure that it provides a way for users to get its source. 
For example, if your program is a web application, its interface could display a 
"Source" link that leads users to an archive of the code. There are many ways 
you could offer source, and different solutions will be better for different 
programs; see section 13 for the specific requirements.

You should also get your employer (if you work as a programmer) or school, if 
any, to sign a "copyright disclaimer" for the program, if necessary. For more 
information on this, and how to apply and follow the GNU AGPL, see 
<http://www.gnu.org/licenses/>.