101
someone else and passed on, we want its recipients to know that what they have is not
the original, so that any problems introduced by others will not refl ect on the original
authors‘ reputations.
Finally, any free program is threatened constantly by software patents. We wish to avoid
the danger that redistributors of a free program will individually obtain patent licenses,
in effect making the program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone‘s free use or not licensed at all.
The precise terms and conditions for copying, distribution and modifi cation follow.
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains a notice placed by
the copyright holder saying it may be distributed under the terms of this General Public
License. The „Program“, below, refers to any such program or work, and a „work based
on the Program“ means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it, either verbatim or with
modifi cations and/or translated into another language. (Hereinafter, translation is inclu-
ded without limitation in the term „modifi cation“.) Each licensee is addressed as „you“.
Activities other than copying, distribution and modifi cation are not covered by this
License; they are outside its scope. The act of running the Program is not restricted, and
the output from the Program is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program). Whether that is
true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program‘s source code as you
receive it, in any medium, provided that you conspicuously and appropriately publish on
each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty; and give any other
recipients of the Program a copy of this License along with the Program.
You may charge a fee for the physical act of transferring a copy, and you may at your
option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion of it, thus forming
a work based on the Program, and copy and distribute such modifi cations or work under
the terms of Section 1 above, provided that you also meet all of these conditions:
a) You must cause the modifi ed fi les to carry prominent notices stating that you changed
the fi les and the date of any change.
b) You must cause any work that you distribute or publish, that in whole or in part con-
tains or is derived from the Program or any part thereof, to be licensed as a whole at no
charge to all third parties under the terms of this License.
c) If the modifi ed program normally reads commands interactively when run, you must
cause it, when started running for such interactive use in the most ordinary way, to print
or display an announcement including an appropriate copyright notice and a notice that
there is no warranty (or else, saying that you provide a warranty) and that users may
redistribute the program under these conditions, and telling the user how to view a copy
of this License. (Exception: if the Program itself is interactive but does not normally print
such an announcement, your work based on the Program is not required to print an
announcement.)
These requirements apply to the modifi ed work as a whole. If identifi able sections of that
work are not derived from the Program, and can be reasonably considered independent
and separate works in themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you distribute the same
sections as part of a whole which is a work based on the Program, the distribution of the
whole must be on the terms of this License, whose permissions for other licensees extend
to the entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest your rights to work writ-
ten entirely by you; rather, the intent is to exercise the right to control the distribution of
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