User's Manual

27
English
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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
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and change free software--to make sure the software is free for
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whose authors commit to using it. (Some other Free Software
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sure that you have 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
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and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender
the rights.
These restrictions translate to certain responsibilities for you if
you distribute copies of the software, or if you modify it.
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whether gratis or for a fee, you must give the recipients all
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receive or can get the source code. And you must show them
these terms so they know their rights.
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ware, and (2) offer you this license which gives you legal per-
mission to copy, distribute and/or modify the software.
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certain that everyone understands that there is no warranty for
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and passed on, we want its recipients to know that what they
have is not the original, so that any problems introduced by
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Finally, any free program is threatened constantly by software
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free program will individually obtain patent licenses, in effect
making the program proprietary. To prevent this, we have
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free use or not licensed at all.
The precise terms and conditions for copying, distribution and
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contains a notice placed by the copyright holder saying it may
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The "Program", below, refers to any such program or work,
and a "work based on the Program" means either the Program
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work containing the Program or a portion of it, either verbatim
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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
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the Program does.
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that you conspicuously and appropriately publish on each copy
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change for a fee.
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any portion of it, thus forming a work based on the Program,
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terms of Section 1 above, provided that you also meet all of
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change.
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that in whole or in part contains or is derived from the Program
or any part thereof, to be licensed as a whole at no charge to all
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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
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interactive but does not normally print such an announcement,
your work based on the Program is not required to print an
announcement.)
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Program, and can be reasonably considered independent and
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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
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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
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collective works based on the Program.
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the Program with the Program (or with a work based on the
Program) on a volume of a storage or distribution medium does
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the terms of Sections 1 and 2 above provided that you also do
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