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<h1>GNU Lesser General Public License</h1>
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<!-- BEGIN LICENSE TEXT -->
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<p>Version 2.1, February 1999</p>
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<pre>
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Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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[This is the first released version of the Lesser GPL. It also counts
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as the successor of the GNU Library Public License, version 2, hence
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the version number 2.1.]
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</pre>
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<h2>Preamble</h2>
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<p>The licenses for most software are designed to take away your
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freedom to share and change it. By contrast, the GNU General
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Public Licenses are intended to guarantee your freedom to share
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and change free software--to make sure the software is free for
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all its users.</p>
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<p>This license, the Lesser General Public License, applies to
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some specially designated software packages--typically
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libraries--of the Free Software Foundation and other authors who
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decide to use it. You can use it too, but we suggest you first
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think carefully about whether this license or the ordinary
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General Public License is the better strategy to use in any
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particular case, based on the explanations below.</p>
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<p>When we speak of free software, we are referring to freedom of
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use, not price. Our General Public Licenses are designed to make
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sure that you have the freedom to distribute copies of free
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software (and charge for this service if you wish); that you
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receive source code or can get it if you want it; that you can
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change the software and use pieces of it in new free programs;
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and that you are informed that you can do these things.</p>
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<p>To protect your rights, we need to make restrictions that
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forbid distributors to deny you these rights or to ask you to
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surrender these rights. These restrictions translate to certain
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responsibilities for you if you distribute copies of the library
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or if you modify it.</p>
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<p>For example, if you distribute copies of the library, whether
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gratis or for a fee, you must give the recipients all the rights
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that we gave you. You must make sure that they, too, receive or
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can get the source code. If you link other code with the library,
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you must provide complete object files to the recipients, so that
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they can relink them with the library after making changes to the
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library and recompiling it. And you must show them these terms so
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they know their rights.</p>
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<p>We protect your rights with a two-step method: (1) we
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copyright the library, and (2) we offer you this license, which
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gives you legal permission to copy, distribute and/or modify the
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library.</p>
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<p>To protect each distributor, we want to make it very clear
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that there is no warranty for the free library. Also, if the
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library is modified by someone else and passed on, the recipients
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should know that what they have is not the original version, so
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that the original author's reputation will not be affected by
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problems that might be introduced by others.</p>
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<p>Finally, software patents pose a constant threat to the
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existence of any free program. We wish to make sure that a
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company cannot effectively restrict the users of a free program
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by obtaining a restrictive license from a patent holder.
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Therefore, we insist that any patent license obtained for a
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version of the library must be consistent with the full freedom
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of use specified in this license.</p>
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<p>Most GNU software, including some libraries, is covered by the
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ordinary GNU General Public License. This license, the GNU Lesser
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General Public License, applies to certain designated libraries,
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and is quite different from the ordinary General Public License.
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We use this license for certain libraries in order to permit
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linking those libraries into non-free programs.</p>
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<p>When a program is linked with a library, whether statically or
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using a shared library, the combination of the two is legally
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speaking a combined work, a derivative of the original library.
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The ordinary General Public License therefore permits such
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linking only if the entire combination fits its criteria of
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freedom. The Lesser General Public License permits more lax
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criteria for linking other code with the library.</p>
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<p>We call this license the "Lesser" General Public License
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because it does Less to protect the user's freedom than the
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ordinary General Public License. It also provides other free
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software developers Less of an advantage over competing non-free
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programs. These disadvantages are the reason we use the ordinary
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General Public License for many libraries. However, the Lesser
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license provides advantages in certain special circumstances.</p>
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<p>For example, on rare occasions, there may be a special need to
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encourage the widest possible use of a certain library, so that
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it becomes a de-facto standard. To achieve this, non-free
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programs must be allowed to use the library. A more frequent case
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is that a free library does the same job as widely used non-free
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libraries. In this case, there is little to gain by limiting the
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free library to free software only, so we use the Lesser General
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Public License.</p>
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<p>In other cases, permission to use a particular library in
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non-free programs enables a greater number of people to use a
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large body of free software. For example, permission to use the
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GNU C Library in non-free programs enables many more people to
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use the whole GNU operating system, as well as its variant, the
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GNU/Linux operating system.</p>
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<p>Although the Lesser General Public License is Less protective
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of the users' freedom, it does ensure that the user of a program
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that is linked with the Library has the freedom and the
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wherewithal to run that program using a modified version of the
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Library.</p>
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<p>The precise terms and conditions for copying, distribution and
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modification follow. Pay close attention to the difference
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between a "work based on the library" and a "work that uses the
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library". The former contains code derived from the library,
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whereas the latter must be combined with the library in order to
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run.</p>
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<h2>Terms and conditions for copying, distribution and modification</h2>
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<p><b>0.</b> This License Agreement applies to any software
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library or other program which contains a notice placed by the
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copyright holder or other authorized party saying it may be
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distributed under the terms of this Lesser General Public License
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(also called "this License"). Each licensee is addressed as
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"you".</p>
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<p>A "library" means a collection of software functions and/or
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data prepared so as to be conveniently linked with application
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programs (which use some of those functions and data) to form
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executables.</p>
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<p>The "Library", below, refers to any such software library or
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work which has been distributed under these terms. A "work based
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on the Library" means either the Library or any derivative work
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under copyright law: that is to say, a work containing the
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Library or a portion of it, either verbatim or with modifications
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and/or translated straightforwardly into another language.
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(Hereinafter, translation is included without limitation in the
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term "modification".)</p>
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<p>"Source code" for a work means the preferred form of the work
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for making modifications to it. For a library, complete source
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to control compilation and installation of the library.</p>
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<p>Activities other than copying, distribution and modification
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act of running a program using the Library is not restricted, and
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output from such a program is covered only if its contents
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<p><b>1.</b> You may copy and distribute verbatim copies of the
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Library's complete source code as you receive it, in any medium,
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provided that you conspicuously and appropriately publish on each
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copy an appropriate copyright notice and disclaimer of warranty;
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keep intact all the notices that refer to this License and to the
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absence of any warranty; and distribute a copy of this License
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along with the Library.</p>
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exchange for a fee.</p>
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<p><b>2.</b> You may modify your copy or copies of the Library or
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any portion of it, thus forming a work based on the Library, and
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copy and distribute such modifications or work under the terms of
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Section 1 above, provided that you also meet all of these
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conditions:</p>
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<ul>
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<li><b>a)</b> The modified work must itself be a software
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library.</li>
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<li><b>b)</b> You must cause the files modified to carry
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prominent notices stating that you changed the files and the date
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of any change.</li>
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<li><b>c)</b> You must cause the whole of the work to be licensed
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at no charge to all third parties under the terms of this
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License.</li>
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<li><b>d)</b> If a facility in the modified Library refers to a
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function or a table of data to be supplied by an application
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program that uses the facility, other than as an argument passed
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when the facility is invoked, then you must make a good faith
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effort to ensure that, in the event an application does not
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supply such function or table, the facility still operates, and
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performs whatever part of its purpose remains meaningful.
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<p>(For example, a function in a library to compute square roots
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has a purpose that is entirely well-defined independent of the
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application. Therefore, Subsection 2d requires that any
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application-supplied function or table used by this function must
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be optional: if the application does not supply it, the square
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root function must still compute square roots.)</p>
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<p>These requirements apply to the modified work as a whole. If
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identifiable sections of that work are not derived from the
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Library, and can be reasonably considered independent and
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separate works in themselves, then this License, and its terms,
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do not apply to those sections when you distribute them as
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separate works. But when you distribute the same sections as part
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of a whole which is a work based on the Library, the distribution
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permissions for other licensees extend to the entire whole, and
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thus to each and every part regardless of who wrote it.</p>
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<p>Thus, it is not the intent of this section to claim rights or
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contest your rights to work written entirely by you; rather, the
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intent is to exercise the right to control the distribution of
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<p>In addition, mere aggregation of another work not based on the
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a volume of a storage or distribution medium does not bring the
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other work under the scope of this License.</p>
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<p><b>3.</b> You may opt to apply the terms of the ordinary GNU
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<p>Once this change is made in a given copy, it is irreversible
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for that copy, so the ordinary GNU General Public License applies
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to all subsequent copies and derivative works made from that
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<p>This option is useful when you wish to copy part of the code
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of the Library into a program that is not a library.</p>
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<p><b>4.</b> You may copy and distribute the Library (or a
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provided that you accompany it with the complete corresponding
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terms of Sections 1 and 2 above on a medium customarily used for
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software interchange.</p>
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<p>If distribution of object code is made by offering access to
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copy from a designated place, then offering equivalent access to
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copy the source code from the same place satisfies the
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parties are not compelled to copy the source along with the
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object code.</p>
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<p><b>5.</b> A program that contains no derivative of any portion
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Library". Such a work, in isolation, is not a derivative work of
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License.</p>
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<p>However, linking a "work that uses the Library" with the
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"work that uses the library". The executable is therefore covered
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by this License. Section 6 states terms for distribution of such
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executables.</p>
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<p>When a "work that uses the Library" uses material from a
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header file that is part of the Library, the object code for the
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work may be a derivative work of the Library even though the
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source code is not. Whether this is true is especially
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significant if the work can be linked without the Library, or if
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the work is itself a library. The threshold for this to be true
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is not precisely defined by law.</p>
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<p>If such an object file uses only numerical parameters, data
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structure layouts and accessors, and small macros and small
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inline functions (ten lines or less in length), then the use of
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the object file is unrestricted, regardless of whether it is
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legally a derivative work. (Executables containing this object
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code plus portions of the Library will still fall under Section
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6.)</p>
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<p>Otherwise, if the work is a derivative of the Library, you may
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distribute the object code for the work under the terms of
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Section 6. Any executables containing that work also fall under
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Section 6, whether or not they are linked directly with the
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Library itself.</p>
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<p><b>6.</b> As an exception to the Sections above, you may also
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combine or link a "work that uses the Library" with the Library
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the terms permit modification of the work for the customer's own
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<p>You must give prominent notice with each copy of the work that
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covered by this License. You must supply a copy of this License.
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Also, you must do one of these things:</p>
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<li><b>a)</b> Accompany the work with the complete corresponding
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changes were used in the work (which must be distributed under
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Sections 1 and 2 above); and, if the work is an executable linked
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uses the Library", as object code and/or source code, so that the
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<li><b>b)</b> Use a suitable shared library mechanism for linking
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executable, and (2) will operate properly with a modified version
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of the library, if the user installs one, as long as the modified
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version is interface-compatible with the version that the work
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was made with.</li>
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<li><b>c)</b> Accompany the work with a written offer, valid for
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at least three years, to give the same user the materials
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specified in Subsection 6a, above, for a charge no more than the
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cost of performing this distribution.</li>
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<li><b>d)</b> If distribution of the work is made by offering
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access to copy from a designated place, offer equivalent access
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to copy the above specified materials from the same place.</li>
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<li><b>e)</b> Verify that the user has already received a copy of
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copy.</li>
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</ul>
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<p>For an executable, the required form of the "work that uses
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the Library" must include any data and utility programs needed
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for reproducing the executable from it. However, as a special
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anything that is normally distributed (in either source or binary
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form) with the major components (compiler, kernel, and so on) of
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component itself accompanies the executable.</p>
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<p>It may happen that this requirement contradicts the license
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restrictions of other proprietary libraries that do not normally
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accompany the operating system. Such a contradiction means you
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cannot use both them and the Library together in an executable
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that you distribute.</p>
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<p><b>7.</b> You may place library facilities that are a work
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based on the Library side-by-side in a single library together
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with other library facilities not covered by this License, and
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distribute such a combined library, provided that the separate
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distribution of the work based on the Library and of the other
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library facilities is otherwise permitted, and provided that you
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do these two things:</p>
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453 |
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|
454 |
<ul>
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455 |
<li><b>a)</b> Accompany the combined library with a copy of the
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456 |
same work based on the Library, uncombined with any other library
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facilities. This must be distributed under the terms of the
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Sections above.</li>
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459 |
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<li><b>b)</b> Give prominent notice with the combined library of
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the fact that part of it is a work based on the Library, and
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explaining where to find the accompanying uncombined form of the
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same work.</li>
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</ul>
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<p><b>8.</b> You may not copy, modify, sublicense, link with, or
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distribute the Library except as expressly provided under this
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License. Any attempt otherwise to copy, modify, sublicense, link
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terminate your rights under this License. However, parties who
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have received copies, or rights, from you under this License will
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in full compliance.</p>
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<p><b>9.</b> You are not required to accept this License, since
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you have not signed it. However, nothing else grants you
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permission to modify or distribute the Library or its derivative
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works. These actions are prohibited by law if you do not accept
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copying, distributing or modifying the Library or works based on
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it.</p>
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<p><b>10.</b> Each time you redistribute the Library (or any work
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based on the Library), the recipient automatically receives a
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license from the original licensor to copy, distribute, link with
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or modify the Library subject to these terms and conditions. You
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may not impose any further restrictions on the recipients'
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exercise of the rights granted herein. You are not responsible
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for enforcing compliance by third parties with this License.</p>
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<p><b>11.</b> If, as a consequence of a court judgment or
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allegation of patent infringement or for any other reason (not
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limited to patent issues), conditions are imposed on you (whether
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conditions of this License, they do not excuse you from the
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conditions of this License. If you cannot distribute so as to
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satisfy simultaneously your obligations under this License and
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not distribute the Library at all. For example, if a patent
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license would not permit royalty-free redistribution of the
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Library by all those who receive copies directly or indirectly
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through you, then the only way you could satisfy both it and this
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License would be to refrain entirely from distribution of the
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Library.</p>
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<p>If any portion of this section is held invalid or
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509 |
unenforceable under any particular circumstance, the balance of
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510 |
the section is intended to apply, and the section as a whole is
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511 |
intended to apply in other circumstances.</p>
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512 |
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513 |
<p>It is not the purpose of this section to induce you to
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infringe any patents or other property right claims or to contest
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validity of any such claims; this section has the sole purpose of
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protecting the integrity of the free software distribution system
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which is implemented by public license practices. Many people
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distributed through that system in reliance on consistent
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520 |
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decide if he or she is willing to distribute software through any
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522 |
other system and a licensee cannot impose that choice.</p>
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<p>This section is intended to make thoroughly clear what is
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believed to be a consequence of the rest of this License.</p>
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<p><b>12.</b> If the distribution and/or use of the Library is
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restricted in certain countries either by patents or by
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529 |
copyrighted interfaces, the original copyright holder who places
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the Library under this License may add an explicit geographical
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531 |
distribution limitation excluding those countries, so that
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532 |
distribution is permitted only in or among countries not thus
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excluded. In such case, this License incorporates the limitation
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534 |
as if written in the body of this License.</p>
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535 |
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536 |
<p><b>13.</b> The Free Software Foundation may publish revised
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537 |
and/or new versions of the Lesser General Public License from
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time to time. Such new versions will be similar in spirit to the
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539 |
present version, but may differ in detail to address new problems
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540 |
or concerns.</p>
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|
541 |
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542 |
<p>Each version is given a distinguishing version number. If the
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Library specifies a version number of this License which applies
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544 |
to it and "any later version", you have the option of following
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545 |
the terms and conditions either of that version or of any later
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546 |
version published by the Free Software Foundation. If the Library
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547 |
does not specify a license version number, you may choose any
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548 |
version ever published by the Free Software Foundation.</p>
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549 |
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550 |
<p><b>14.</b> If you wish to incorporate parts of the Library
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551 |
into other free programs whose distribution conditions are
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552 |
incompatible with these, write to the author to ask for
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553 |
permission. For software which is copyrighted by the Free
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554 |
Software Foundation, write to the Free Software Foundation; we
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555 |
sometimes make exceptions for this. Our decision will be guided
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|
556 |
by the two goals of preserving the free status of all derivatives
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557 |
of our free software and of promoting the sharing and reuse of
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|
558 |
software generally.</p>
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|
559 |
|
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|
560 |
<p><b>NO WARRANTY</b></p>
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|
561 |
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|
562 |
<p><b>15.</b> BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE,
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563 |
THERE IS NO WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY
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564 |
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE
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565 |
COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE LIBRARY "AS
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|
566 |
IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
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567 |
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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568 |
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE
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|
569 |
RISK AS TO THE QUALITY AND PERFORMANCE OF THE LIBRARY IS WITH
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|
570 |
YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME THE COST OF
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571 |
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.</p>
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|
572 |
|
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|
573 |
<p><b>16.</b> IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR
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|
574 |
AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER
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|
575 |
PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED
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576 |
ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL,
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577 |
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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578 |
USE OR INABILITY TO USE THE LIBRARY (INCLUDING BUT NOT LIMITED TO
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|
579 |
LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES
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|
580 |
SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE LIBRARY TO
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581 |
OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER
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|
582 |
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.</p>
|
|
|
583 |
|
|
|
584 |
<h2>END OF TERMS AND CONDITIONS</h2>
|
|
|
585 |
|
|
|
586 |
<h2>How to Apply These Terms to Your New Libraries</h2>
|
|
|
587 |
|
|
|
588 |
<p>If you develop a new library, and you want it to be of the
|
|
|
589 |
greatest possible use to the public, we recommend making it free
|
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|
590 |
software that everyone can redistribute and change. You can do so
|
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|
591 |
by permitting redistribution under these terms (or,
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|
592 |
alternatively, under the terms of the ordinary General Public
|
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|
593 |
License).</p>
|
|
|
594 |
|
|
|
595 |
<p>To apply these terms, attach the following notices to the
|
|
|
596 |
library. It is safest to attach them to the start of each source
|
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|
597 |
file to most effectively convey the exclusion of warranty; and
|
|
|
598 |
each file should have at least the "copyright" line and a pointer
|
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|
599 |
to where the full notice is found.</p>
|
|
|
600 |
|
|
|
601 |
<pre>
|
|
|
602 |
<one line to give the library's name and an idea of what it does.>
|
|
|
603 |
Copyright (C) <year> <name of author>
|
|
|
604 |
|
|
|
605 |
This library is free software; you can redistribute it and/or
|
|
|
606 |
modify it under the terms of the GNU Lesser General Public
|
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|
607 |
License as published by the Free Software Foundation; either
|
|
|
608 |
version 2.1 of the License, or (at your option) any later version.
|
|
|
609 |
|
|
|
610 |
This library is distributed in the hope that it will be useful,
|
|
|
611 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
612 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
613 |
Lesser General Public License for more details.
|
|
|
614 |
|
|
|
615 |
You should have received a copy of the GNU Lesser General Public
|
|
|
616 |
License along with this library; if not, write to the Free Software
|
|
|
617 |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
618 |
</pre>
|
|
|
619 |
|
|
|
620 |
<p>Also add information on how to contact you by electronic and
|
|
|
621 |
paper mail.</p>
|
|
|
622 |
|
|
|
623 |
<p>You should also get your employer (if you work as a
|
|
|
624 |
programmer) or your school, if any, to sign a "copyright
|
|
|
625 |
disclaimer" for the library, if necessary. Here is a sample;
|
|
|
626 |
alter the names:</p>
|
|
|
627 |
|
|
|
628 |
<pre>
|
|
|
629 |
Yoyodyne, Inc., hereby disclaims all copyright interest in
|
|
|
630 |
the library `Frob' (a library for tweaking knobs) written
|
|
|
631 |
by James Random Hacker.
|
|
|
632 |
|
|
|
633 |
<signature of Ty Coon>, 1 April 1990
|
|
|
634 |
Ty Coon, President of Vice
|
|
|
635 |
</pre>
|
|
|
636 |
|
|
|
637 |
<p>That's all there is to it!</p>
|
|
|
638 |
|
|
|
639 |
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