Arvados-DCO-1.1-Signed-off-by: Radhika Chippada <radhika@curoverse.com>

[arvados.git] / doc / user / copying / agpl-3.0.html

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<p style="text-align: center;">Version 3, 19 November 2007</p>

<p>Copyright &copy; 2007 Free Software Foundation,
Inc. &lt;<a href="http://www.fsf.org/">http://fsf.org/</a>&gt;
 <br />
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.</p>

<h3><a name="preamble"></a>Preamble</h3>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>The precise terms and conditions for copying, distribution and
modification follow.</p>

<h3><a name="terms"></a>TERMS AND CONDITIONS</h3>

<h4><a name="section0"></a>0. Definitions.</h4>

<p>&quot;This License&quot; refers to version 3 of the GNU Affero General Public
License.</p>

<p>&quot;Copyright&quot; also means copyright-like laws that apply to other kinds
of works, such as semiconductor masks.</p>

<p>&quot;The Program&quot; refers to any copyrightable work licensed under this
License.  Each licensee is addressed as &quot;you&quot;.  &quot;Licensees&quot; and
&quot;recipients&quot; may be individuals or organizations.</p>

<p>To &quot;modify&quot; a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy.  The resulting work is called a &quot;modified version&quot; of the
earlier work or a work &quot;based on&quot; the earlier work.</p>

<p>A &quot;covered work&quot; means either the unmodified Program or a work based
on the Program.</p>

<p>To &quot;propagate&quot; a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy.  Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.</p>

<p>To &quot;convey&quot; a work means any kind of propagation that enables other
parties to make or receive copies.  Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.</p>

<p>An interactive user interface displays &quot;Appropriate Legal Notices&quot;
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License.  If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.</p>

<h4><a name="section1"></a>1. Source Code.</h4>

<p>The &quot;source code&quot; for a work means the preferred form of the work
for making modifications to it.  &quot;Object code&quot; means any non-source
form of a work.</p>

<p>A &quot;Standard Interface&quot; means an interface that either is an official
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<p>The &quot;System Libraries&quot; of an executable work include anything, other
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<p>The &quot;Corresponding Source&quot; for a work in object code form means all
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<p>The Corresponding Source for a work in source code form is that
same work.</p>

<h4><a name="section2"></a>2. Basic Permissions.</h4>

<p>All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met.  This License explicitly affirms your unlimited
permission to run the unmodified Program.  The output from running a
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<p>You may make, run and propagate covered works that you do not
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<p>No covered work shall be deemed part of an effective technological
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<p>When you convey a covered work, you waive any legal power to forbid
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<h4><a name="section4"></a>4. Conveying Verbatim Copies.</h4>

<p>You may convey verbatim copies of the Program's source code as you
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<h4><a name="section5"></a>5. Conveying Modified Source Versions.</h4>

<p>You may convey a work based on the Program, or the modifications to
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<ul>

<li>a) The work must carry prominent notices stating that you modified
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<li>b) The work must carry prominent notices stating that it is
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<h4><a name="section6"></a>6. Conveying Non-Source Forms.</h4>

<p>You may convey a covered work in object code form under the terms
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<p>A separable portion of the object code, whose source code is excluded
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<p>A &quot;User Product&quot; is either (1) a &quot;consumer product&quot;, which means any
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<p>If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
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<p>The requirement to provide Installation Information does not include a
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<p>Corresponding Source conveyed, and Installation Information provided,
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<h4><a name="section7"></a>7. Additional Terms.</h4>

<p>&quot;Additional permissions&quot; are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.</p>

<p>When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it.  (Additional permissions may be written to require their own
removal in certain cases when you modify the work.)  You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.</p>

<p>Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:</p>

<ul>

<li>a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or</li>

<li>b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or</li>

<li>c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
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<li>d) Limiting the use for publicity purposes of names of licensors or
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<li>e) Declining to grant rights under trademark law for use of some
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<li>f) Requiring indemnification of licensors and authors of that
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</ul>

<p>All other non-permissive additional terms are considered &quot;further
restrictions&quot; within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further restriction,
you may remove that term.  If a license document contains a further
restriction but permits relicensing or conveying under this License, you
may add to a covered work material governed by the terms of that license
document, provided that the further restriction does not survive such
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<p>If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
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where to find the applicable terms.</p>

<p>Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.</p>

<h4><a name="section8"></a>8. Termination.</h4>

<p>You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).</p>

<p>However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.</p>

<p>Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.</p>

<p>Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.</p>

<h4><a name="section9"></a>9. Acceptance Not Required for Having Copies.</h4>

<p>You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.</p>

<h4><a name="section10"></a>10. Automatic Licensing of Downstream Recipients.</h4>

<p>Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.</p>

<p>An &quot;entity transaction&quot; is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.</p>

<p>You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.</p>

<h4><a name="section11"></a>11. Patents.</h4>

<p>A &quot;contributor&quot; is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's &quot;contributor version&quot;.</p>

<p>A contributor's &quot;essential patent claims&quot; are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
purposes of this definition, &quot;control&quot; includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.</p>

<p>Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.</p>

<p>In the following three paragraphs, a &quot;patent license&quot; is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement).  To &quot;grant&quot; such a patent license to a
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patent against the party.</p>

<p>If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  &quot;Knowingly relying&quot; means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.</p>

<p>If, pursuant to or in connection with a single transaction or
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you grant is automatically extended to all recipients of the covered
work and works based on it.</p>

<p>A patent license is &quot;discriminatory&quot; if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License.  You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
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contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.</p>

<p>Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.</p>

<h4><a name="section12"></a>12. No Surrender of Others' Freedom.</h4>

<p>If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.</p>

<h4><a name="section13"></a>13. Remote Network Interaction; Use with the GNU General Public License.</h4>

<p>Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software.  This 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.</p>

<p>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.</p>

<h4><a name="section14"></a>14. Revised Versions of this License.</h4>

<p>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.</p>

<p>Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU Affero
General Public License &quot;or any later version&quot; 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.</p>

<p>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.</p>

<p>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.</p>

<h4><a name="section15"></a>15. Disclaimer of Warranty.</h4>

<p>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 &quot;AS IS&quot; 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.</p>

<h4><a name="section16"></a>16. Limitation of Liability.</h4>

<p>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.</p>

<h4><a name="section17"></a>17. Interpretation of Sections 15 and 16.</h4>

<p>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.</p>

<p>END OF TERMS AND CONDITIONS</p>

<h3><a name="howto"></a>How to Apply These Terms to Your New Programs</h3>

<p>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.</p>

<p>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 &quot;copyright&quot; line and a pointer to where the full notice is found.</p>

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

    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 &lt;http://www.gnu.org/licenses/&gt;.
</pre>

<p>Also add information on how to contact you by electronic and paper mail.</p>

<p>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 &quot;Source&quot; 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.</p>

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