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Appendix
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hablone 2005_05_02
of freedom. The Lesser General Public License permits more lax criteria for linking other code with
the library.
We call this license the "Lesser" General Public License because it does Less to protect the user’s
freedom than the ordinary General Public License. It also provides other free software developers
Less of an advantage over competing non-free programs. These disadvantages are the reason we
use the ordinary General Public License for many libraries. However, the Lesser license provides
advantages in certain special circumstances.
For example, on rare occasions, there may be a special need to encourage the widest possible use
of a certain library, so that it becomes a de-facto standard. To achieve this, non-free programs must
be allowed to use the library. A more frequent case is that a free library does the same job as widely
used non-free libraries. In this case, there is little to gain by limiting the free library to free software
only, so we use the Lesser General Public License.
In other cases, permission to use a particular library in non-free programs enables a greater
number of people to use a large body of free software. For example, permission to use the GNU C
Library in non-free programs enables many more people to use the whole GNU operating system,
as well as its variant, the GNU/Linux operating system.
Although the Lesser General Public License is Less protective of the users’ freedom, it does ensure
that the user of a program that is linked with the Library has the freedom and the wherewithal to
run that program using a modified version of the Library.
The precise terms and conditions for copying, distribution and modification follow. Pay close atten-
tion to the difference between a "work based on the library" and a "work that uses the library". The
former contains code derived from the library, whereas the latter must be combined with the
library in order to run.
GNU LESSER GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License Agreement applies to any software library or other program which contains a notice
placed by the copyright holder or other authorized party saying it may be distributed under the
terms of this Lesser General Public License (also called "this License"). Each licensee is addressed
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The "Library", below, refers to any such software library or work which has been distributed under
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"Source code" for a work means the preferred form of the work for making modifications to it. For
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Activities other than copying, distribution and modification are not covered by this License; they
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Library does and what the program that uses the Library does.
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