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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.
Also, for each author's protection and ours, we
want to make certain that everyone understands
that there is no warranty for this free software. If
the software is modified by someone else and
passed on, we want its recipients to know that
what they have is not the original, so that any pro-
blems introduced by others will not reflect 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 indivi-
dually 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 pre-
cise terms and conditions for copying, distribution
and modification follow.
GNU GENERAL PUBLIC LICENSE
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
modifications and/or translated into another lan-
guage. (Hereinafter, translation is included
without limitation in the term "modification".)
Each licensee is addressed as "you".
Activities other than copying, distribution and
modification are not covered by this License; they
are outside its scope. The act of running the Pro-
gram 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 Pro-
gram 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 appro-
priate 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 trans-
ferring a copy, and you may, at your discretion,
offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Pro-
gram or any portion of it, thus forming a work
based on the Program, and copy and distribute
such modifications or work under the terms of
Section 1 above, provided that you also meet all of
these conditions:
a) You must cause the modified files to carry
prominent notices stating that you changed
the files and the date of any change.
b) You must cause any work that you distribute
or publish, that in whole or in part contains or
is derived from the Program or any part the-
reof, to be licensed as a whole at no charge to
all third parties under the terms of this License.
c) If the modified program normally reads
commands interactively when run, you must
cause it, when running is commenced 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 condi-
tions, 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 announce-
ment.)
These requirements apply to the modified work as
a whole. If identifiable sections of that work are
not derived from the Program, and can be reaso-
nably 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 distri-
bution 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 con-
test your rights to work written entirely by you;
rather, the intent is to exercise the right to control
the distribution of derivative or collective works
based on the Program.
In addition, mere aggregation of another work not
based on the Program with the Program (or with a
Anexo
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