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3 <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Appendix D. GNU General Public License version 3</title><meta name="generator" content="DocBook XSL Stylesheets V1.74.3" /><link rel="home" href="../spine.html" title="The GNU C++ Library Documentation" /><link rel="up" href="spine.html" title="The GNU C++ Library" /><link rel="prev" href="appendix_free.html" title="Appendix C. Free Software Needs Free Documentation" /><link rel="next" href="appendix_gfdl.html" title="Appendix E. GNU Free Documentation License" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Appendix D.
4 GNU General Public License version 3
5 </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="appendix_free.html">Prev</a> </td><th width="60%" align="center">The GNU C++ Library</th><td width="20%" align="right"> <a accesskey="n" href="appendix_gfdl.html">Next</a></td></tr></table><hr /></div><div class="appendix" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title"><a id="appendix.gpl-3.0"></a>Appendix D.
6 <acronym class="acronym">GNU</acronym> General Public License version 3
7 </h2></div></div></div><p>
8 Version 3, 29 June 2007
10 Copyright © 2007 Free Software Foundation, Inc.
11 <a class="ulink" href="http://www.fsf.org/" target="_top">http://www.fsf.org/</a>
13 Everyone is permitted to copy and distribute verbatim copies of this license
14 document, but changing it is not allowed.
15 </p><h2><a id="gpl-3-preamble"></a>
18 The <acronym class="acronym">GNU</acronym> General Public License is a free, copyleft
19 license for software and other kinds of works.
21 The licenses for most software and other practical works are designed to
22 take away your freedom to share and change the works. By contrast, the
23 <acronym class="acronym">GNU</acronym> General Public License is intended to guarantee your
24 freedom to share and change all versions of a program—to make sure it
25 remains free software for all its users. We, the Free Software Foundation,
26 use the <acronym class="acronym">GNU</acronym> General Public License for most of our
27 software; it applies also to any other work released this way by its
28 authors. You can apply it to your programs, too.
30 When we speak of free software, we are referring to freedom, not price. Our
31 General Public Licenses are designed to make sure that you have the freedom
32 to distribute copies of free software (and charge for them if you wish),
33 that you receive source code or can get it if you want it, that you can
34 change the software or use pieces of it in new free programs, and that you
35 know you can do these things.
37 To protect your rights, we need to prevent others from denying you these
38 rights or asking you to surrender the rights. Therefore, you have certain
39 responsibilities if you distribute copies of the software, or if you modify
40 it: responsibilities to respect the freedom of others.
42 For example, if you distribute copies of such a program, whether gratis or
43 for a fee, you must pass on to the recipients the same freedoms that you
44 received. You must make sure that they, too, receive or can get the source
45 code. And you must show them these terms so they know their rights.
47 Developers that use the <acronym class="acronym">GNU</acronym> <acronym class="acronym">GPL</acronym>
48 protect your rights with two steps: (1) assert copyright on the software,
49 and (2) offer you this License giving you legal permission to copy,
50 distribute and/or modify it.
52 For the developers’ and authors’ protection, the
53 <acronym class="acronym">GPL</acronym> clearly explains that there is no warranty for this
54 free software. For both users’ and authors’ sake, the
55 <acronym class="acronym">GPL</acronym> requires that modified versions be marked as changed,
56 so that their problems will not be attributed erroneously to authors of
59 Some devices are designed to deny users access to install or run modified
60 versions of the software inside them, although the manufacturer can do so.
61 This is fundamentally incompatible with the aim of protecting users’
62 freedom to change the software. The systematic pattern of such abuse occurs
63 in the area of products for individuals to use, which is precisely where it
64 is most unacceptable. Therefore, we have designed this version of the
65 <acronym class="acronym">GPL</acronym> to prohibit the practice for those products. If such
66 problems arise substantially in other domains, we stand ready to extend this
67 provision to those domains in future versions of the <acronym class="acronym">GPL</acronym>,
68 as needed to protect the freedom of users.
70 Finally, every program is threatened constantly by software patents. States
71 should not allow patents to restrict development and use of software on
72 general-purpose computers, but in those that do, we wish to avoid the
73 special danger that patents applied to a free program could make it
74 effectively proprietary. To prevent this, the <acronym class="acronym">GPL</acronym>
75 assures that patents cannot be used to render the program non-free.
77 The precise terms and conditions for copying, distribution and modification
79 </p><h2><a id="id587672"></a>
81 </h2><h2><a id="gpl-3-definitions"></a>
84 “This License” refers to version 3 of the <acronym class="acronym">GNU</acronym>
85 General Public License.
87 “Copyright” also means copyright-like laws that apply to other
88 kinds of works, such as semiconductor masks.
90 “The Program” refers to any copyrightable work licensed under
91 this License. Each licensee is addressed as “you”.
92 “Licensees” and “recipients” may be individuals or
95 To “modify” a work means to copy from or adapt all or part of
96 the work in a fashion requiring copyright permission, other than the making
97 of an exact copy. The resulting work is called a “modified
98 version” of the earlier work or a work “based on” the
101 A “covered work” means either the unmodified Program or a work
102 based on the Program.
104 To “propagate” a work means to do anything with it that, without
105 permission, would make you directly or secondarily liable for infringement
106 under applicable copyright law, except executing it on a computer or
107 modifying a private copy. Propagation includes copying, distribution (with
108 or without modification), making available to the public, and in some
109 countries other activities as well.
111 To “convey” a work means any kind of propagation that enables
112 other parties to make or receive copies. Mere interaction with a user
113 through a computer network, with no transfer of a copy, is not conveying.
115 An interactive user interface displays “Appropriate Legal
116 Notices” to the extent that it includes a convenient and prominently
117 visible feature that (1) displays an appropriate copyright notice, and (2)
118 tells the user that there is no warranty for the work (except to the extent
119 that warranties are provided), that licensees may convey the work under this
120 License, and how to view a copy of this License. If the interface presents
121 a list of user commands or options, such as a menu, a prominent item in the
122 list meets this criterion.
123 </p><h2><a id="SourceCode"></a>
126 The “source code” for a work means the preferred form of the
127 work for making modifications to it. “Object code” means any
128 non-source form of a work.
130 A “Standard Interface” means an interface that either is an
131 official standard defined by a recognized standards body, or, in the case of
132 interfaces specified for a particular programming language, one that is
133 widely used among developers working in that language.
135 The “System Libraries” of an executable work include anything,
136 other than the work as a whole, that (a) is included in the normal form of
137 packaging a Major Component, but which is not part of that Major Component,
138 and (b) serves only to enable use of the work with that Major Component, or
139 to implement a Standard Interface for which an implementation is available
140 to the public in source code form. A “Major Component”, in this
141 context, means a major essential component (kernel, window system, and so
142 on) of the specific operating system (if any) on which the executable work
143 runs, or a compiler used to produce the work, or an object code interpreter
146 The “Corresponding Source” for a work in object code form means
147 all the source code needed to generate, install, and (for an executable
148 work) run the object code and to modify the work, including scripts to
149 control those activities. However, it does not include the work’s
150 System Libraries, or general-purpose tools or generally available free
151 programs which are used unmodified in performing those activities but which
152 are not part of the work. For example, Corresponding Source includes
153 interface definition files associated with source files for the work, and
154 the source code for shared libraries and dynamically linked subprograms that
155 the work is specifically designed to require, such as by intimate data
156 communication or control flow between those subprograms and other parts of
159 The Corresponding Source need not include anything that users can regenerate
160 automatically from other parts of the Corresponding Source.
162 The Corresponding Source for a work in source code form is that same work.
163 </p><h2><a id="BasicPermissions"></a>
164 2. Basic Permissions.
166 All rights granted under this License are granted for the term of copyright
167 on the Program, and are irrevocable provided the stated conditions are met.
168 This License explicitly affirms your unlimited permission to run the
169 unmodified Program. The output from running a covered work is covered by
170 this License only if the output, given its content, constitutes a covered
171 work. This License acknowledges your rights of fair use or other
172 equivalent, as provided by copyright law.
174 You may make, run and propagate covered works that you do not convey,
175 without conditions so long as your license otherwise remains in force. You
176 may convey covered works to others for the sole purpose of having them make
177 modifications exclusively for you, or provide you with facilities for
178 running those works, provided that you comply with the terms of this License
179 in conveying all material for which you do not control copyright. Those
180 thus making or running the covered works for you must do so exclusively on
181 your behalf, under your direction and control, on terms that prohibit them
182 from making any copies of your copyrighted material outside their
183 relationship with you.
185 Conveying under any other circumstances is permitted solely under the
186 conditions stated below. Sublicensing is not allowed; section 10 makes it
188 </p><h2><a id="Protecting"></a>
189 3. Protecting Users’ Legal Rights From Anti-Circumvention Law.
191 No covered work shall be deemed part of an effective technological measure
192 under any applicable law fulfilling obligations under article 11 of the WIPO
193 copyright treaty adopted on 20 December 1996, or similar laws prohibiting or
194 restricting circumvention of such measures.
196 When you convey a covered work, you waive any legal power to forbid
197 circumvention of technological measures to the extent such circumvention is
198 effected by exercising rights under this License with respect to the covered
199 work, and you disclaim any intention to limit operation or modification of
200 the work as a means of enforcing, against the work’s users, your or
201 third parties’ legal rights to forbid circumvention of technological
203 </p><h2><a id="ConveyingVerbatim"></a>
204 4. Conveying Verbatim Copies.
206 You may convey verbatim copies of the Program’s source code as you
207 receive it, in any medium, provided that you conspicuously and appropriately
208 publish on each copy an appropriate copyright notice; keep intact all
209 notices stating that this License and any non-permissive terms added in
210 accord with section 7 apply to the code; keep intact all notices of the
211 absence of any warranty; and give all recipients a copy of this License
212 along with the Program.
214 You may charge any price or no price for each copy that you convey, and you
215 may offer support or warranty protection for a fee.
216 </p><h2><a id="ConveyingModified"></a>
217 5. Conveying Modified Source Versions.
219 You may convey a work based on the Program, or the modifications to produce
220 it from the Program, in the form of source code under the terms of section
221 4, provided that you also meet all of these conditions:
222 </p><div class="orderedlist"><ol type="a"><li><p>
223 The work must carry prominent notices stating that you modified it, and
224 giving a relevant date.
226 The work must carry prominent notices stating that it is released under
227 this License and any conditions added under section 7. This requirement
228 modifies the requirement in section 4 to “keep intact all
231 You must license the entire work, as a whole, under this License to
232 anyone who comes into possession of a copy. This License will therefore
233 apply, along with any applicable section 7 additional terms, to the
234 whole of the work, and all its parts, regardless of how they are
235 packaged. This License gives no permission to license the work in any
236 other way, but it does not invalidate such permission if you have
237 separately received it.
239 If the work has interactive user interfaces, each must display
240 Appropriate Legal Notices; however, if the Program has interactive
241 interfaces that do not display Appropriate Legal Notices, your work need
243 </p></li></ol></div><p>
244 A compilation of a covered work with other separate and independent works,
245 which are not by their nature extensions of the covered work, and which are
246 not combined with it such as to form a larger program, in or on a volume of
247 a storage or distribution medium, is called an “aggregate” if
248 the compilation and its resulting copyright are not used to limit the access
249 or legal rights of the compilation’s users beyond what the individual works
250 permit. Inclusion of a covered work in an aggregate does not cause
251 this License to apply to the other parts of the aggregate.
252 </p><h2><a id="ConveyingNonSource"></a>
253 6. Conveying Non-Source Forms.
255 You may convey a covered work in object code form under the terms of
256 sections 4 and 5, provided that you also convey the machine-readable
257 Corresponding Source under the terms of this License, in one of these ways:
258 </p><div class="orderedlist"><ol type="a"><li><p>
259 Convey the object code in, or embodied in, a physical product (including
260 a physical distribution medium), accompanied by the Corresponding Source
261 fixed on a durable physical medium customarily used for software
264 Convey the object code in, or embodied in, a physical product (including
265 a physical distribution medium), accompanied by a written offer, valid
266 for at least three years and valid for as long as you offer spare parts
267 or customer support for that product model, to give anyone who possesses
268 the object code either (1) a copy of the Corresponding Source for all
269 the software in the product that is covered by this License, on a
270 durable physical medium customarily used for software interchange, for a
271 price no more than your reasonable cost of physically performing this
272 conveying of source, or (2) access to copy the Corresponding Source from
273 a network server at no charge.
275 Convey individual copies of the object code with a copy of the written
276 offer to provide the Corresponding Source. This alternative is allowed
277 only occasionally and noncommercially, and only if you received the
278 object code with such an offer, in accord with subsection 6b.
280 Convey the object code by offering access from a designated place
281 (gratis or for a charge), and offer equivalent access to the
282 Corresponding Source in the same way through the same place at no
283 further charge. You need not require recipients to copy the
284 Corresponding Source along with the object code. If the place to copy
285 the object code is a network server, the Corresponding Source may be on
286 a different server (operated by you or a third party) that supports
287 equivalent copying facilities, provided you maintain clear directions
288 next to the object code saying where to find the Corresponding Source.
289 Regardless of what server hosts the Corresponding Source, you remain
290 obligated to ensure that it is available for as long as needed to
291 satisfy these requirements.
293 Convey the object code using peer-to-peer transmission, provided you
294 inform other peers where the object code and Corresponding Source of the
295 work are being offered to the general public at no charge under
297 </p></li></ol></div><p>
298 A separable portion of the object code, whose source code is excluded from
299 the Corresponding Source as a System Library, need not be included in
300 conveying the object code work.
302 A “User Product” is either (1) a “consumer product”,
303 which means any tangible personal property which is normally used for
304 personal, family, or household purposes, or (2) anything designed or sold
305 for incorporation into a dwelling. In determining whether a product is a
306 consumer product, doubtful cases shall be resolved in favor of coverage.
307 For a particular product received by a particular user, “normally
308 used” refers to a typical or common use of that class of product,
309 regardless of the status of the particular user or of the way in which the
310 particular user actually uses, or expects or is expected to use, the
311 product. A product is a consumer product regardless of whether the product
312 has substantial commercial, industrial or non-consumer uses, unless such
313 uses represent the only significant mode of use of the product.
315 “Installation Information” for a User Product means any methods,
316 procedures, authorization keys, or other information required to install and
317 execute modified versions of a covered work in that User Product from a
318 modified version of its Corresponding Source. The information must suffice
319 to ensure that the continued functioning of the modified object code is in
320 no case prevented or interfered with solely because modification has been
323 If you convey an object code work under this section in, or with, or
324 specifically for use in, a User Product, and the conveying occurs as part of
325 a transaction in which the right of possession and use of the User Product
326 is transferred to the recipient in perpetuity or for a fixed term
327 (regardless of how the transaction is characterized), the Corresponding
328 Source conveyed under this section must be accompanied by the Installation
329 Information. But this requirement does not apply if neither you nor any
330 third party retains the ability to install modified object code on the User
331 Product (for example, the work has been installed in
332 <acronym class="acronym">ROM</acronym>).
334 The requirement to provide Installation Information does not include a
335 requirement to continue to provide support service, warranty, or updates for
336 a work that has been modified or installed by the recipient, or for the User
337 Product in which it has been modified or installed. Access to a network may
338 be denied when the modification itself materially and adversely affects the
339 operation of the network or violates the rules and protocols for
340 communication across the network.
342 Corresponding Source conveyed, and Installation Information provided, in
343 accord with this section must be in a format that is publicly documented
344 (and with an implementation available to the public in source code form),
345 and must require no special password or key for unpacking, reading or
347 </p><h2><a id="AdditionalTerms"></a>
350 “Additional permissions” are terms that supplement the terms of
351 this License by making exceptions from one or more of its conditions.
352 Additional permissions that are applicable to the entire Program shall be
353 treated as though they were included in this License, to the extent that
354 they are valid under applicable law. If additional permissions apply only
355 to part of the Program, that part may be used separately under those
356 permissions, but the entire Program remains governed by this License
357 without regard to the additional permissions.
359 When you convey a copy of a covered work, you may at your option remove any
360 additional permissions from that copy, or from any part of it. (Additional
361 permissions may be written to require their own removal in certain cases
362 when you modify the work.) You may place additional permissions on
363 material, added by you to a covered work, for which you have or can give
364 appropriate copyright permission.
366 Notwithstanding any other provision of this License, for material you add
367 to a covered work, you may (if authorized by the copyright holders of that
368 material) supplement the terms of this License with terms:
369 </p><div class="orderedlist"><ol type="a"><li><p>
370 Disclaiming warranty or limiting liability differently from the terms
371 of sections 15 and 16 of this License; or
373 Requiring preservation of specified reasonable legal notices or author
374 attributions in that material or in the Appropriate Legal Notices
375 displayed by works containing it; or
377 Prohibiting misrepresentation of the origin of that material, or
378 requiring that modified versions of such material be marked in
379 reasonable ways as different from the original version; or
381 Limiting the use for publicity purposes of names of licensors or
382 authors of the material; or
384 Declining to grant rights under trademark law for use of some trade
385 names, trademarks, or service marks; or
387 Requiring indemnification of licensors and authors of that material by
388 anyone who conveys the material (or modified versions of it) with
389 contractual assumptions of liability to the recipient, for any
390 liability that these contractual assumptions directly impose on those
391 licensors and authors.
392 </p></li></ol></div><p>
393 All other non-permissive additional terms are considered “further
394 restrictions” within the meaning of section 10. If the Program as
395 you received it, or any part of it, contains a notice stating that it is
396 governed by this License along with a term that is a further restriction,
397 you may remove that term. If a license document contains a further
398 restriction but permits relicensing or conveying under this License, you
399 may add to a covered work material governed by the terms of that license
400 document, provided that the further restriction does not survive such
401 relicensing or conveying.
403 If you add terms to a covered work in accord with this section, you must
404 place, in the relevant source files, a statement of the additional terms
405 that apply to those files, or a notice indicating where to find the
408 Additional terms, permissive or non-permissive, may be stated in the form
409 of a separately written license, or stated as exceptions; the above
410 requirements apply either way.
411 </p><h2><a id="gpl-3-termination"></a>
414 You may not propagate or modify a covered work except as expressly provided
415 under this License. Any attempt otherwise to propagate or modify it is
416 void, and will automatically terminate your rights under this License
417 (including any patent licenses granted under the third paragraph of section
420 However, if you cease all violation of this License, then your license from
421 a particular copyright holder is reinstated (a) provisionally, unless and
422 until the copyright holder explicitly and finally terminates your license,
423 and (b) permanently, if the copyright holder fails to notify you of the
424 violation by some reasonable means prior to 60 days after the cessation.
426 Moreover, your license from a particular copyright holder is reinstated
427 permanently if the copyright holder notifies you of the violation by some
428 reasonable means, this is the first time you have received notice of
429 violation of this License (for any work) from that copyright holder, and
430 you cure the violation prior to 30 days after your receipt of the notice.
432 Termination of your rights under this section does not terminate the
433 licenses of parties who have received copies or rights from you under this
434 License. If your rights have been terminated and not permanently
435 reinstated, you do not qualify to receive new licenses for the same
436 material under section 10.
437 </p><h2><a id="AcceptanceNotRequired"></a>
438 9. Acceptance Not Required for Having Copies.
440 You are not required to accept this License in order to receive or run a
441 copy of the Program. Ancillary propagation of a covered work occurring
442 solely as a consequence of using peer-to-peer transmission to receive a
443 copy likewise does not require acceptance. However, nothing other than
444 this License grants you permission to propagate or modify any covered work.
445 These actions infringe copyright if you do not accept this License.
446 Therefore, by modifying or propagating a covered work, you indicate your
447 acceptance of this License to do so.
448 </p><h2><a id="AutomaticDownstream"></a>
449 10. Automatic Licensing of Downstream Recipients.
451 Each time you convey a covered work, the recipient automatically receives a
452 license from the original licensors, to run, modify and propagate that
453 work, subject to this License. You are not responsible for enforcing
454 compliance by third parties with this License.
456 An “entity transaction” is a transaction transferring control
457 of an organization, or substantially all assets of one, or subdividing an
458 organization, or merging organizations. If propagation of a covered work
459 results from an entity transaction, each party to that transaction who
460 receives a copy of the work also receives whatever licenses to the work the
461 party’s predecessor in interest had or could give under the previous
462 paragraph, plus a right to possession of the Corresponding Source of the
463 work from the predecessor in interest, if the predecessor has it or can get
464 it with reasonable efforts.
466 You may not impose any further restrictions on the exercise of the rights
467 granted or affirmed under this License. For example, you may not impose a
468 license fee, royalty, or other charge for exercise of rights granted under
469 this License, and you may not initiate litigation (including a cross-claim
470 or counterclaim in a lawsuit) alleging that any patent claim is infringed
471 by making, using, selling, offering for sale, or importing the Program or
473 </p><h2><a id="Patents"></a>
476 A “contributor” is a copyright holder who authorizes use under
477 this License of the Program or a work on which the Program is based. The
478 work thus licensed is called the contributor’s “contributor
481 A contributor’s “essential patent claims” are all patent
482 claims owned or controlled by the contributor, whether already acquired or
483 hereafter acquired, that would be infringed by some manner, permitted by
484 this License, of making, using, or selling its contributor version, but do
485 not include claims that would be infringed only as a consequence of further
486 modification of the contributor version. For purposes of this definition,
487 “control” includes the right to grant patent sublicenses in a
488 manner consistent with the requirements of this License.
490 Each contributor grants you a non-exclusive, worldwide, royalty-free patent
491 license under the contributor’s essential patent claims, to make, use,
492 sell, offer for sale, import and otherwise run, modify and propagate the
493 contents of its contributor version.
495 In the following three paragraphs, a “patent license” is any
496 express agreement or commitment, however denominated, not to enforce a
497 patent (such as an express permission to practice a patent or covenant not
498 to sue for patent infringement). To “grant” such a patent
499 license to a party means to make such an agreement or commitment not to
500 enforce a patent against the party.
502 If you convey a covered work, knowingly relying on a patent license, and the
503 Corresponding Source of the work is not available for anyone to copy, free
504 of charge and under the terms of this License, through a publicly available
505 network server or other readily accessible means, then you must either (1)
506 cause the Corresponding Source to be so available, or (2) arrange to deprive
507 yourself of the benefit of the patent license for this particular work, or
508 (3) arrange, in a manner consistent with the requirements of this License,
509 to extend the patent license to downstream recipients. “Knowingly
510 relying” means you have actual knowledge that, but for the patent
511 license, your conveying the covered work in a country, or your
512 recipient’s use of the covered work in a country, would infringe one
513 or more identifiable patents in that country that you have reason to believe
516 If, pursuant to or in connection with a single transaction or arrangement,
517 you convey, or propagate by procuring conveyance of, a covered work, and
518 grant a patent license to some of the parties receiving the covered work
519 authorizing them to use, propagate, modify or convey a specific copy of the
520 covered work, then the patent license you grant is automatically extended to
521 all recipients of the covered work and works based on it.
523 A patent license is “discriminatory” if it does not include
524 within the scope of its coverage, prohibits the exercise of, or is
525 conditioned on the non-exercise of one or more of the rights that are
526 specifically granted under this License. You may not convey a covered work
527 if you are a party to an arrangement with a third party that is in the
528 business of distributing software, under which you make payment to the third
529 party based on the extent of your activity of conveying the work, and under
530 which the third party grants, to any of the parties who would receive the
531 covered work from you, a discriminatory patent license (a) in connection
532 with copies of the covered work conveyed by you (or copies made from those
533 copies), or (b) primarily for and in connection with specific products or
534 compilations that contain the covered work, unless you entered into that
535 arrangement, or that patent license was granted, prior to 28 March 2007.
537 Nothing in this License shall be construed as excluding or limiting any
538 implied license or other defenses to infringement that may otherwise be
539 available to you under applicable patent law.
540 </p><h2><a id="NoSurrender"></a>
541 12. No Surrender of Others’ Freedom.
543 If conditions are imposed on you (whether by court order, agreement or
544 otherwise) that contradict the conditions of this License, they do not
545 excuse you from the conditions of this License. If you cannot convey a
546 covered work so as to satisfy simultaneously your obligations under this
547 License and any other pertinent obligations, then as a consequence you may
548 not convey it at all. For example, if you agree to terms that obligate you
549 to collect a royalty for further conveying from those to whom you convey the
550 Program, the only way you could satisfy both those terms and this License
551 would be to refrain entirely from conveying the Program.
552 </p><h2><a id="UsedWithAGPL"></a>
553 13. Use with the <acronym class="acronym">GNU</acronym> Affero General Public License.
555 Notwithstanding any other provision of this License, you have permission to
556 link or combine any covered work with a work licensed under version 3 of the
557 <acronym class="acronym">GNU</acronym> Affero General Public License into a single combined
558 work, and to convey the resulting work. The terms of this License will
559 continue to apply to the part which is the covered work, but the special
560 requirements of the <acronym class="acronym">GNU</acronym> Affero General Public License,
561 section 13, concerning interaction through a network will apply to the
563 </p><h2><a id="RevisedVersions"></a>
564 14. Revised Versions of this License.
566 The Free Software Foundation may publish revised and/or new versions of the
567 <acronym class="acronym">GNU</acronym> General Public License from time to time. Such new
568 versions will be similar in spirit to the present version, but may differ in
569 detail to address new problems or concerns.
571 Each version is given a distinguishing version number. If the Program
572 specifies that a certain numbered version of the <acronym class="acronym">GNU</acronym>
573 General Public License “or any later version” applies to it, you
574 have the option of following the terms and conditions either of that
575 numbered version or of any later version published by the Free Software
576 Foundation. If the Program does not specify a version number of the
577 <acronym class="acronym">GNU</acronym> General Public License, you may choose any version
578 ever published by the Free Software Foundation.
580 If the Program specifies that a proxy can decide which future versions of
581 the <acronym class="acronym">GNU</acronym> General Public License can be used, that
582 proxy’s public statement of acceptance of a version permanently
583 authorizes you to choose that version for the Program.
585 Later license versions may give you additional or different permissions.
586 However, no additional obligations are imposed on any author or copyright
587 holder as a result of your choosing to follow a later version.
588 </p><h2><a id="WarrantyDisclaimer"></a>
589 15. Disclaimer of Warranty.
591 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
592 LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
593 OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF
594 ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
595 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
596 THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
597 YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
598 NECESSARY SERVICING, REPAIR OR CORRECTION.
599 </p><h2><a id="LiabilityLimitation"></a>
600 16. Limitation of Liability.
602 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
603 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
604 PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
606 OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA
607 OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
611 </p><h2><a id="InterpretationSecs1516"></a>
612 17. Interpretation of Sections 15 and 16.
614 If the disclaimer of warranty and limitation of liability provided above
615 cannot be given local legal effect according to their terms, reviewing
616 courts shall apply local law that most closely approximates an absolute
617 waiver of all civil liability in connection with the Program, unless a
618 warranty or assumption of liability accompanies a copy of the Program in
620 </p><h2><a id="id522436"></a>
621 END OF TERMS AND CONDITIONS
622 </h2><h2><a id="HowToApply"></a>
623 How to Apply These Terms to Your New Programs
625 If you develop a new program, and you want it to be of the greatest possible
626 use to the public, the best way to achieve this is to make it free software
627 which everyone can redistribute and change under these terms.
629 To do so, attach the following notices to the program. It is safest to
630 attach them to the start of each source file to most effectively state the
631 exclusion of warranty; and each file should have at least the
632 “copyright” line and a pointer to where the full notice is
634 </p><pre class="screen">
635 <em class="replaceable"><code>one line to give the program’s name and a brief idea of what it does.</code></em>
636 Copyright (C) <em class="replaceable"><code>year</code></em> <em class="replaceable"><code>name of author</code></em>
638 This program is free software: you can redistribute it and/or modify
639 it under the terms of the <acronym class="acronym">GNU</acronym> General Public License as published by
640 the Free Software Foundation, either version 3 of the License, or
641 (at your option) any later version.
643 This program is distributed in the hope that it will be useful,
644 but WITHOUT ANY WARRANTY; without even the implied warranty of
645 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
646 <acronym class="acronym">GNU</acronym> General Public License for more details.
648 You should have received a copy of the <acronym class="acronym">GNU</acronym> General Public License
649 along with this program. If not, see <a class="ulink" href="http://www.gnu.org/licenses/" target="_top">http://www.gnu.org/licenses/</a>.
651 Also add information on how to contact you by electronic and paper mail.
653 If the program does terminal interaction, make it output a short notice like
654 this when it starts in an interactive mode:
655 </p><pre class="screen">
656 <em class="replaceable"><code>program</code></em> Copyright (C) <em class="replaceable"><code>year</code></em> <em class="replaceable"><code>name of author</code></em>
657 This program comes with ABSOLUTELY NO WARRANTY; for details type ‘<code class="literal">show w</code>’.
658 This is free software, and you are welcome to redistribute it
659 under certain conditions; type ‘<code class="literal">show c</code>’ for details.
661 The hypothetical commands ‘<code class="literal">show w</code>’ and
662 ‘<code class="literal">show c</code>’ should show the appropriate parts of
663 the General Public License. Of course, your program’s commands might be
664 different; for a GUI interface, you would use an “about box”.
666 You should also get your employer (if you work as a programmer) or school,
667 if any, to sign a “copyright disclaimer” for the program, if
668 necessary. For more information on this, and how to apply and follow the
669 <acronym class="acronym">GNU</acronym> <acronym class="acronym">GPL</acronym>, see
670 <a class="ulink" href="http://www.gnu.org/licenses/" target="_top">http://www.gnu.org/licenses/</a>.
672 The <acronym class="acronym">GNU</acronym> General Public License does not permit
673 incorporating your program into proprietary programs. If your program is a
674 subroutine library, you may consider it more useful to permit linking
675 proprietary applications with the library. If this is what you want to do,
676 use the <acronym class="acronym">GNU</acronym> Lesser General Public License instead of this
677 License. But first, please read <a class="ulink" href="http://www.gnu.org/philosophy/why-not-lgpl.html" target="_top">http://www.gnu.org/philosophy/why-not-lgpl.html</a>.
678 </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="appendix_free.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="spine.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="appendix_gfdl.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Appendix C.
679 Free Software Needs Free Documentation
681 </td><td width="20%" align="center"><a accesskey="h" href="../spine.html">Home</a></td><td width="40%" align="right" valign="top"> Appendix E. GNU Free Documentation License</td></tr></table></div></body></html>
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