1-15
60
GNU License
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Regarding the GNU General
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GNU General Public License
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software
Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA 02111-
1307, USA
Everyone is permitted to copy and distribute
verbatim copies of this license document, but
changing it is not allowed.
◆Preamble
The licenses for most software are designed to
take away your freedom to share and change it.
By contrast, the GNU General Public License is
intended to guarantee your freedom to share and
change free software-to make sure the software is
free for all its users. This General Public License
applies to most of the Free Software
Foundation’s software and to any other program
whose authors commit to using it. (Some other
Free Software Foundation software is covered by
the GNU Lesser General Public License instead.)
You can apply it to your programs, too.
When we speak of free software, we are referring
to freedom, not price. Our General Public
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the freedom to distribute copies of free software
(and charge for this service if you wish), that you
receive source code or can get it if you want it,
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To protect your rights, we need to make
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for you if you distribute copies of the software, or
if you modify it.
For example, if you distribute copies of such a
program, whether gratis or for a fee, you must
give the recipients all the rights that you have.
You must make sure that they, too, receive or can
get the source code. And you must show them
these terms so they know their rights.
We protect your rights with two steps: (1)
copyright the software, and (2) offer you this
license which gives you legal permission to
copy, distribute and/or modify the software.
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DISTRIBUTION AND MODIFICATION
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These requirements apply to the modified
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61
Additional Information
on the Program), you indicate your
acceptance of this License to do so, and all
its terms and conditions for copying,
distributing or modifying the Program or
works based on it.
6. Each time you redistribute the Program (or
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◆NO WARRANTY
11. BECAUSE THE PROGRAM IS
LICENSED FREE OF CHARGE, THERE
IS NO WARRANTY FOR THE
PROGRAM, TO THE EXTENT
PERMITTED BYAPPLICABLE LAW.
EXCEPT WHEN OTHERWISE STATED
IN WRITING THE COPYRIGHT
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PROVIDE THEPROGRAM “AS IS”
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YOU ASSUME THE COST OF ALL
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◆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
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<one line to give the program’s name and an
idea of what it does.>
Copyright (C) yyyy name of author
This program is free software; you can
redistribute it and/or modify it under the terms of
the GNU General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU
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if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
Also add information on how to contact you by
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If the program is interactive, make it output a
short notice like this when it starts in an
interactive mode:
Gnomovision version 69, Copyright (C)
year name of author
Gnomovision comes with ABSOLUTELY
NO WARRANTY; for details type ‘show
w’. This is free software, and you are
welcome to redistribute it under certain
conditions; type ‘show c’ for details.
The hypothetical commands ‘show w’ and ‘show
c’ should show the appropriate parts of the
General Public License. Of course, the
commands you use may be called something
other than ‘show w’ and ‘show c’; they could
even be mouse-clicks or menu items-whatever
suits your program.
You should also get your employer (if you work
as a programmer) or your school, if any, to sign
a “copyright disclaimer” for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright
interest in the program ‘Gnomovision’ (which
makes passes at compilers) written by James
Hacker.
signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit
incorporating your program into proprietary
programs. If your program is a subroutine
library, you may consider it more useful to
permit linking proprietary applications with the
library. If this is what you want to do, use the
GNU Lesser General Public License instead of
this License.
GNU Lesser General Public
License
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software
Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-
1307, USA
Everyone is permitted to copy and distribute
verbatim copies of this license document, but
changing it is not allowed.
[This is the first released version of the Lesser
GPL. It also counts as the successor of the GNU
Library Public License, version 2, hence the
version number2.1.]
◆Preamble
The licenses for most software are designed to
take away your freedom to share and change it.
By contrast, the GNU General Public Licenses
are intended to guarantee your freedom to share
and change free software-to make sure the
software is free for all its users. This license, the
Lesser General Public License, applies to some
specially designated software packages-typically
libraries-of the Free Software Foundation and
other authors who decide to use it. You can use it
too, but we sugg est you first thi nk carefully about
whether this license or the ordinary General
Public License is the better strategy to use in any
particular case, based on the explanations below.
When we speak of free software, we are referring
to freedom of use, not price. Our General Public
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the freedom to distribute copies of free software
(and charge for this service if you wish); that you
receive source code or can get it if you want it;
that you can change the software and use pieces
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informed that you can do these things.
To protect your rights, we need to make
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these rights or to ask you to surrender these
rights. These restrictions translate to certain
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the library or if you modify it.
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must make sure that they, too, receive or can get
the source code. If you link other code with the
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the recipients, so that they can relink them with
the library after making changes to the library
,continued
62
and recompiling it. And you must show them
these terms so they know their rights.
We protect your rights with a two-step method:
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