189
A
P
P
EN
D
IX
Although the Lesser General Public License is Less protec-
tive 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 ver-
sion of the Library.
The precise terms and conditions for copying, distribution
and modification follow. Pay close attention to the differ-
ence 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 license
is addressed as "you".
A “library” means a collection of software functions
and/or data prepared so as to be conveniently linked
with application programs (which use some of those
functions and data) to form executables.
The “Library”, below, refers to any such software library or
work which has been distributed under these terms. A
“work based on the Library” means either the Library or
any derivative work under copyright law: that is to say, a
work containing the library or a portion of it, either verba-
tim or with modifications and/or translated straightfor-
wardly into another language. (Hereinafter, translation is
included without limitation in the term “modification”.)
“Source code” for a work means the preferred form of
the work for making modifications to it. For a library,
complete source code means all the source code for all
modules it contains, plus any associated interface defi-
nition files, plus the scripts used to control compilation
and installation of the library.
Activities other than copying, distribution and modifica-
tion are not covered by this license; they are outside its
scope. The act of running a program using the Library
is not restricted, and output from such a program is
covered only if its contents constitute a work based on
the library (independent of the use of the Library in a
tool for writing it). Whether that is true depends on what
the library does and what the program that uses the
library does.
1. You may copy and distribute verbatim copies of the
library's complete source code as you receive it, in any
medium, provided that you conspicuously and appropri-
ately 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 distribute a copy of this license along
with the Library.
You may charge a fee for the physical act of transferring
a copy, and you may at your option offer warranty pro-
tection in exchange for a fee.
2. You may modify your copy or copies of the Library or
any portion of it, thus forming a work based on the
Library, 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) The modified work must itself be a software library.
b) You must cause the files modified to carry prominent
notices stating that you changed the files and the
date of any change.
c) You must cause the whole of the work to be licensed
at no charge to all third parties under the terms of
this license.
d) If a facility in the modified Library refers to a function
or a table of data to be supplied by an application
program that uses the facility, other than as an argu-
ment passed when the facility is invoked, then you
must make a good faith effort to ensure that, in the
event an application does not supply such function or
table, the facility still operates, and performs what-
ever part of its purpose remains meaningful.
(For example, a function in a library to compute square
roots has a purpose that is entirely well-defined indepen-
dent of the application. Therefore, Subsection 2d
requires that any application-supplied function or table
used by this function must be optional: if the application
does not supply it, the square root function must still
compute square roots.)
These requirements apply to the modified work as a
whole. If identifiable sections of that work are not
derived from the library, and can be reasonably consid-
ered 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 library, the distribu-
tion of the whole must be on the terms of this license,
whose permissions for other licenses 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 written entirely by you; rather,
the intent is to exercise the right to control the distribu-
tion of derivative or collective works based on the library.
In addition, mere aggregation of another work not based
on the library with the library (or with a work based on
the library) on a volume of a storage or distribution
medium does not bring the other work under the scope
of this license.
