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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 V1.75.2" /><link rel="home" href="../spine.html" title="The GNU C++ Library Documentation" /><link rel="up" href="bk01pt04.html" title="Part IV. Appendices" /><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 <acronym class="acronym">GNU</acronym> 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">Part IV.
7 </th><td width="20%" align="right"> <a accesskey="n" href="appendix_gfdl.html">Next</a></td></tr></table><hr /></div><div class="appendix" title="Appendix D. GNU General Public License version 3"><div class="titlepage"><div><div><h2 class="title"><a id="appendix.gpl-3.0"></a>Appendix D.
8 <acronym class="acronym">GNU</acronym> General Public License version 3
9 </h2></div></div></div><p>
10 Version 3, 29 June 2007
12 Copyright © 2007 Free Software Foundation, Inc.
13 <a class="ulink" href="http://www.fsf.org/" target="_top">http://www.fsf.org/</a>
15 Everyone is permitted to copy and distribute verbatim copies of this license
16 document, but changing it is not allowed.
17 </p><h2><a id="gpl-3-preamble"></a>
20 The <acronym class="acronym">GNU</acronym> General Public License is a free, copyleft
21 license for software and other kinds of works.
23 The licenses for most software and other practical works are designed to
24 take away your freedom to share and change the works. By contrast, the
25 <acronym class="acronym">GNU</acronym> General Public License is intended to guarantee your
26 freedom to share and change all versions of a program—to make sure it
27 remains free software for all its users. We, the Free Software Foundation,
28 use the <acronym class="acronym">GNU</acronym> General Public License for most of our
29 software; it applies also to any other work released this way by its
30 authors. You can apply it to your programs, too.
32 When we speak of free software, we are referring to freedom, not price. Our
33 General Public Licenses are designed to make sure that you have the freedom
34 to distribute copies of free software (and charge for them if you wish),
35 that you receive source code or can get it if you want it, that you can
36 change the software or use pieces of it in new free programs, and that you
37 know you can do these things.
39 To protect your rights, we need to prevent others from denying you these
40 rights or asking you to surrender the rights. Therefore, you have certain
41 responsibilities if you distribute copies of the software, or if you modify
42 it: responsibilities to respect the freedom of others.
44 For example, if you distribute copies of such a program, whether gratis or
45 for a fee, you must pass on to the recipients the same freedoms that you
46 received. You must make sure that they, too, receive or can get the source
47 code. And you must show them these terms so they know their rights.
49 Developers that use the <acronym class="acronym">GNU</acronym> <acronym class="acronym">GPL</acronym>
50 protect your rights with two steps: (1) assert copyright on the software,
51 and (2) offer you this License giving you legal permission to copy,
52 distribute and/or modify it.
54 For the developers’ and authors’ protection, the
55 <acronym class="acronym">GPL</acronym> clearly explains that there is no warranty for this
56 free software. For both users’ and authors’ sake, the
57 <acronym class="acronym">GPL</acronym> requires that modified versions be marked as changed,
58 so that their problems will not be attributed erroneously to authors of
61 Some devices are designed to deny users access to install or run modified
62 versions of the software inside them, although the manufacturer can do so.
63 This is fundamentally incompatible with the aim of protecting users’
64 freedom to change the software. The systematic pattern of such abuse occurs
65 in the area of products for individuals to use, which is precisely where it
66 is most unacceptable. Therefore, we have designed this version of the
67 <acronym class="acronym">GPL</acronym> to prohibit the practice for those products. If such
68 problems arise substantially in other domains, we stand ready to extend this
69 provision to those domains in future versions of the <acronym class="acronym">GPL</acronym>,
70 as needed to protect the freedom of users.
72 Finally, every program is threatened constantly by software patents. States
73 should not allow patents to restrict development and use of software on
74 general-purpose computers, but in those that do, we wish to avoid the
75 special danger that patents applied to a free program could make it
76 effectively proprietary. To prevent this, the <acronym class="acronym">GPL</acronym>
77 assures that patents cannot be used to render the program non-free.
79 The precise terms and conditions for copying, distribution and modification
81 </p><h2><a id="id558362"></a>
83 </h2><h2><a id="gpl-3-definitions"></a>
86 “This License” refers to version 3 of the <acronym class="acronym">GNU</acronym>
87 General Public License.
89 “Copyright” also means copyright-like laws that apply to other
90 kinds of works, such as semiconductor masks.
92 “The Program” refers to any copyrightable work licensed under
93 this License. Each licensee is addressed as “you”.
94 “Licensees” and “recipients” may be individuals or
97 To “modify” a work means to copy from or adapt all or part of
98 the work in a fashion requiring copyright permission, other than the making
99 of an exact copy. The resulting work is called a “modified
100 version” of the earlier work or a work “based on” the
103 A “covered work” means either the unmodified Program or a work
104 based on the Program.
106 To “propagate” a work means to do anything with it that, without
107 permission, would make you directly or secondarily liable for infringement
108 under applicable copyright law, except executing it on a computer or
109 modifying a private copy. Propagation includes copying, distribution (with
110 or without modification), making available to the public, and in some
111 countries other activities as well.
113 To “convey” a work means any kind of propagation that enables
114 other parties to make or receive copies. Mere interaction with a user
115 through a computer network, with no transfer of a copy, is not conveying.
117 An interactive user interface displays “Appropriate Legal
118 Notices” to the extent that it includes a convenient and prominently
119 visible feature that (1) displays an appropriate copyright notice, and (2)
120 tells the user that there is no warranty for the work (except to the extent
121 that warranties are provided), that licensees may convey the work under this
122 License, and how to view a copy of this License. If the interface presents
123 a list of user commands or options, such as a menu, a prominent item in the
124 list meets this criterion.
125 </p><h2><a id="SourceCode"></a>
128 The “source code” for a work means the preferred form of the
129 work for making modifications to it. “Object code” means any
130 non-source form of a work.
132 A “Standard Interface” means an interface that either is an
133 official standard defined by a recognized standards body, or, in the case of
134 interfaces specified for a particular programming language, one that is
135 widely used among developers working in that language.
137 The “System Libraries” of an executable work include anything,
138 other than the work as a whole, that (a) is included in the normal form of
139 packaging a Major Component, but which is not part of that Major Component,
140 and (b) serves only to enable use of the work with that Major Component, or
141 to implement a Standard Interface for which an implementation is available
142 to the public in source code form. A “Major Component”, in this
143 context, means a major essential component (kernel, window system, and so
144 on) of the specific operating system (if any) on which the executable work
145 runs, or a compiler used to produce the work, or an object code interpreter
148 The “Corresponding Source” for a work in object code form means
149 all the source code needed to generate, install, and (for an executable
150 work) run the object code and to modify the work, including scripts to
151 control those activities. However, it does not include the work’s
152 System Libraries, or general-purpose tools or generally available free
153 programs which are used unmodified in performing those activities but which
154 are not part of the work. For example, Corresponding Source includes
155 interface definition files associated with source files for the work, and
156 the source code for shared libraries and dynamically linked subprograms that
157 the work is specifically designed to require, such as by intimate data
158 communication or control flow between those subprograms and other parts of
161 The Corresponding Source need not include anything that users can regenerate
162 automatically from other parts of the Corresponding Source.
164 The Corresponding Source for a work in source code form is that same work.
165 </p><h2><a id="BasicPermissions"></a>
166 2. Basic Permissions.
168 All rights granted under this License are granted for the term of copyright
169 on the Program, and are irrevocable provided the stated conditions are met.
170 This License explicitly affirms your unlimited permission to run the
171 unmodified Program. The output from running a covered work is covered by
172 this License only if the output, given its content, constitutes a covered
173 work. This License acknowledges your rights of fair use or other
174 equivalent, as provided by copyright law.
176 You may make, run and propagate covered works that you do not convey,
177 without conditions so long as your license otherwise remains in force. You
178 may convey covered works to others for the sole purpose of having them make
179 modifications exclusively for you, or provide you with facilities for
180 running those works, provided that you comply with the terms of this License
181 in conveying all material for which you do not control copyright. Those
182 thus making or running the covered works for you must do so exclusively on
183 your behalf, under your direction and control, on terms that prohibit them
184 from making any copies of your copyrighted material outside their
185 relationship with you.
187 Conveying under any other circumstances is permitted solely under the
188 conditions stated below. Sublicensing is not allowed; section 10 makes it
190 </p><h2><a id="Protecting"></a>
191 3. Protecting Users’ Legal Rights From Anti-Circumvention Law.
193 No covered work shall be deemed part of an effective technological measure
194 under any applicable law fulfilling obligations under article 11 of the WIPO
195 copyright treaty adopted on 20 December 1996, or similar laws prohibiting or
196 restricting circumvention of such measures.
198 When you convey a covered work, you waive any legal power to forbid
199 circumvention of technological measures to the extent such circumvention is
200 effected by exercising rights under this License with respect to the covered
201 work, and you disclaim any intention to limit operation or modification of
202 the work as a means of enforcing, against the work’s users, your or
203 third parties’ legal rights to forbid circumvention of technological
205 </p><h2><a id="ConveyingVerbatim"></a>
206 4. Conveying Verbatim Copies.
208 You may convey verbatim copies of the Program’s source code as you
209 receive it, in any medium, provided that you conspicuously and appropriately
210 publish on each copy an appropriate copyright notice; keep intact all
211 notices stating that this License and any non-permissive terms added in
212 accord with section 7 apply to the code; keep intact all notices of the
213 absence of any warranty; and give all recipients a copy of this License
214 along with the Program.
216 You may charge any price or no price for each copy that you convey, and you
217 may offer support or warranty protection for a fee.
218 </p><h2><a id="ConveyingModified"></a>
219 5. Conveying Modified Source Versions.
221 You may convey a work based on the Program, or the modifications to produce
222 it from the Program, in the form of source code under the terms of section
223 4, provided that you also meet all of these conditions:
224 </p><div class="orderedlist"><ol class="orderedlist" type="a"><li class="listitem"><p>
225 The work must carry prominent notices stating that you modified it, and
226 giving a relevant date.
227 </p></li><li class="listitem"><p>
228 The work must carry prominent notices stating that it is released under
229 this License and any conditions added under section 7. This requirement
230 modifies the requirement in section 4 to “keep intact all
232 </p></li><li class="listitem"><p>
233 You must license the entire work, as a whole, under this License to
234 anyone who comes into possession of a copy. This License will therefore
235 apply, along with any applicable section 7 additional terms, to the
236 whole of the work, and all its parts, regardless of how they are
237 packaged. This License gives no permission to license the work in any
238 other way, but it does not invalidate such permission if you have
239 separately received it.
240 </p></li><li class="listitem"><p>
241 If the work has interactive user interfaces, each must display
242 Appropriate Legal Notices; however, if the Program has interactive
243 interfaces that do not display Appropriate Legal Notices, your work need
245 </p></li></ol></div><p>
246 A compilation of a covered work with other separate and independent works,
247 which are not by their nature extensions of the covered work, and which are
248 not combined with it such as to form a larger program, in or on a volume of
249 a storage or distribution medium, is called an “aggregate” if
250 the compilation and its resulting copyright are not used to limit the access
251 or legal rights of the compilation’s users beyond what the individual works
252 permit. Inclusion of a covered work in an aggregate does not cause
253 this License to apply to the other parts of the aggregate.
254 </p><h2><a id="ConveyingNonSource"></a>
255 6. Conveying Non-Source Forms.
257 You may convey a covered work in object code form under the terms of
258 sections 4 and 5, provided that you also convey the machine-readable
259 Corresponding Source under the terms of this License, in one of these ways:
260 </p><div class="orderedlist"><ol class="orderedlist" type="a"><li class="listitem"><p>
261 Convey the object code in, or embodied in, a physical product (including
262 a physical distribution medium), accompanied by the Corresponding Source
263 fixed on a durable physical medium customarily used for software
265 </p></li><li class="listitem"><p>
266 Convey the object code in, or embodied in, a physical product (including
267 a physical distribution medium), accompanied by a written offer, valid
268 for at least three years and valid for as long as you offer spare parts
269 or customer support for that product model, to give anyone who possesses
270 the object code either (1) a copy of the Corresponding Source for all
271 the software in the product that is covered by this License, on a
272 durable physical medium customarily used for software interchange, for a
273 price no more than your reasonable cost of physically performing this
274 conveying of source, or (2) access to copy the Corresponding Source from
275 a network server at no charge.
276 </p></li><li class="listitem"><p>
277 Convey individual copies of the object code with a copy of the written
278 offer to provide the Corresponding Source. This alternative is allowed
279 only occasionally and noncommercially, and only if you received the
280 object code with such an offer, in accord with subsection 6b.
281 </p></li><li class="listitem"><p>
282 Convey the object code by offering access from a designated place
283 (gratis or for a charge), and offer equivalent access to the
284 Corresponding Source in the same way through the same place at no
285 further charge. You need not require recipients to copy the
286 Corresponding Source along with the object code. If the place to copy
287 the object code is a network server, the Corresponding Source may be on
288 a different server (operated by you or a third party) that supports
289 equivalent copying facilities, provided you maintain clear directions
290 next to the object code saying where to find the Corresponding Source.
291 Regardless of what server hosts the Corresponding Source, you remain
292 obligated to ensure that it is available for as long as needed to
293 satisfy these requirements.
294 </p></li><li class="listitem"><p>
295 Convey the object code using peer-to-peer transmission, provided you
296 inform other peers where the object code and Corresponding Source of the
297 work are being offered to the general public at no charge under
299 </p></li></ol></div><p>
300 A separable portion of the object code, whose source code is excluded from
301 the Corresponding Source as a System Library, need not be included in
302 conveying the object code work.
304 A “User Product” is either (1) a “consumer product”,
305 which means any tangible personal property which is normally used for
306 personal, family, or household purposes, or (2) anything designed or sold
307 for incorporation into a dwelling. In determining whether a product is a
308 consumer product, doubtful cases shall be resolved in favor of coverage.
309 For a particular product received by a particular user, “normally
310 used” refers to a typical or common use of that class of product,
311 regardless of the status of the particular user or of the way in which the
312 particular user actually uses, or expects or is expected to use, the
313 product. A product is a consumer product regardless of whether the product
314 has substantial commercial, industrial or non-consumer uses, unless such
315 uses represent the only significant mode of use of the product.
317 “Installation Information” for a User Product means any methods,
318 procedures, authorization keys, or other information required to install and
319 execute modified versions of a covered work in that User Product from a
320 modified version of its Corresponding Source. The information must suffice
321 to ensure that the continued functioning of the modified object code is in
322 no case prevented or interfered with solely because modification has been
325 If you convey an object code work under this section in, or with, or
326 specifically for use in, a User Product, and the conveying occurs as part of
327 a transaction in which the right of possession and use of the User Product
328 is transferred to the recipient in perpetuity or for a fixed term
329 (regardless of how the transaction is characterized), the Corresponding
330 Source conveyed under this section must be accompanied by the Installation
331 Information. But this requirement does not apply if neither you nor any
332 third party retains the ability to install modified object code on the User
333 Product (for example, the work has been installed in
334 <acronym class="acronym">ROM</acronym>).
336 The requirement to provide Installation Information does not include a
337 requirement to continue to provide support service, warranty, or updates for
338 a work that has been modified or installed by the recipient, or for the User
339 Product in which it has been modified or installed. Access to a network may
340 be denied when the modification itself materially and adversely affects the
341 operation of the network or violates the rules and protocols for
342 communication across the network.
344 Corresponding Source conveyed, and Installation Information provided, in
345 accord with this section must be in a format that is publicly documented
346 (and with an implementation available to the public in source code form),
347 and must require no special password or key for unpacking, reading or
349 </p><h2><a id="AdditionalTerms"></a>
352 “Additional permissions” are terms that supplement the terms of
353 this License by making exceptions from one or more of its conditions.
354 Additional permissions that are applicable to the entire Program shall be
355 treated as though they were included in this License, to the extent that
356 they are valid under applicable law. If additional permissions apply only
357 to part of the Program, that part may be used separately under those
358 permissions, but the entire Program remains governed by this License
359 without regard to the additional permissions.
361 When you convey a copy of a covered work, you may at your option remove any
362 additional permissions from that copy, or from any part of it. (Additional
363 permissions may be written to require their own removal in certain cases
364 when you modify the work.) You may place additional permissions on
365 material, added by you to a covered work, for which you have or can give
366 appropriate copyright permission.
368 Notwithstanding any other provision of this License, for material you add
369 to a covered work, you may (if authorized by the copyright holders of that
370 material) supplement the terms of this License with terms:
371 </p><div class="orderedlist"><ol class="orderedlist" type="a"><li class="listitem"><p>
372 Disclaiming warranty or limiting liability differently from the terms
373 of sections 15 and 16 of this License; or
374 </p></li><li class="listitem"><p>
375 Requiring preservation of specified reasonable legal notices or author
376 attributions in that material or in the Appropriate Legal Notices
377 displayed by works containing it; or
378 </p></li><li class="listitem"><p>
379 Prohibiting misrepresentation of the origin of that material, or
380 requiring that modified versions of such material be marked in
381 reasonable ways as different from the original version; or
382 </p></li><li class="listitem"><p>
383 Limiting the use for publicity purposes of names of licensors or
384 authors of the material; or
385 </p></li><li class="listitem"><p>
386 Declining to grant rights under trademark law for use of some trade
387 names, trademarks, or service marks; or
388 </p></li><li class="listitem"><p>
389 Requiring indemnification of licensors and authors of that material by
390 anyone who conveys the material (or modified versions of it) with
391 contractual assumptions of liability to the recipient, for any
392 liability that these contractual assumptions directly impose on those
393 licensors and authors.
394 </p></li></ol></div><p>
395 All other non-permissive additional terms are considered “further
396 restrictions” within the meaning of section 10. If the Program as
397 you received it, or any part of it, contains a notice stating that it is
398 governed by this License along with a term that is a further restriction,
399 you may remove that term. If a license document contains a further
400 restriction but permits relicensing or conveying under this License, you
401 may add to a covered work material governed by the terms of that license
402 document, provided that the further restriction does not survive such
403 relicensing or conveying.
405 If you add terms to a covered work in accord with this section, you must
406 place, in the relevant source files, a statement of the additional terms
407 that apply to those files, or a notice indicating where to find the
410 Additional terms, permissive or non-permissive, may be stated in the form
411 of a separately written license, or stated as exceptions; the above
412 requirements apply either way.
413 </p><h2><a id="gpl-3-termination"></a>
416 You may not propagate or modify a covered work except as expressly provided
417 under this License. Any attempt otherwise to propagate or modify it is
418 void, and will automatically terminate your rights under this License
419 (including any patent licenses granted under the third paragraph of section
422 However, if you cease all violation of this License, then your license from
423 a particular copyright holder is reinstated (a) provisionally, unless and
424 until the copyright holder explicitly and finally terminates your license,
425 and (b) permanently, if the copyright holder fails to notify you of the
426 violation by some reasonable means prior to 60 days after the cessation.
428 Moreover, your license from a particular copyright holder is reinstated
429 permanently if the copyright holder notifies you of the violation by some
430 reasonable means, this is the first time you have received notice of
431 violation of this License (for any work) from that copyright holder, and
432 you cure the violation prior to 30 days after your receipt of the notice.
434 Termination of your rights under this section does not terminate the
435 licenses of parties who have received copies or rights from you under this
436 License. If your rights have been terminated and not permanently
437 reinstated, you do not qualify to receive new licenses for the same
438 material under section 10.
439 </p><h2><a id="AcceptanceNotRequired"></a>
440 9. Acceptance Not Required for Having Copies.
442 You are not required to accept this License in order to receive or run a
443 copy of the Program. Ancillary propagation of a covered work occurring
444 solely as a consequence of using peer-to-peer transmission to receive a
445 copy likewise does not require acceptance. However, nothing other than
446 this License grants you permission to propagate or modify any covered work.
447 These actions infringe copyright if you do not accept this License.
448 Therefore, by modifying or propagating a covered work, you indicate your
449 acceptance of this License to do so.
450 </p><h2><a id="AutomaticDownstream"></a>
451 10. Automatic Licensing of Downstream Recipients.
453 Each time you convey a covered work, the recipient automatically receives a
454 license from the original licensors, to run, modify and propagate that
455 work, subject to this License. You are not responsible for enforcing
456 compliance by third parties with this License.
458 An “entity transaction” is a transaction transferring control
459 of an organization, or substantially all assets of one, or subdividing an
460 organization, or merging organizations. If propagation of a covered work
461 results from an entity transaction, each party to that transaction who
462 receives a copy of the work also receives whatever licenses to the work the
463 party’s predecessor in interest had or could give under the previous
464 paragraph, plus a right to possession of the Corresponding Source of the
465 work from the predecessor in interest, if the predecessor has it or can get
466 it with reasonable efforts.
468 You may not impose any further restrictions on the exercise of the rights
469 granted or affirmed under this License. For example, you may not impose a
470 license fee, royalty, or other charge for exercise of rights granted under
471 this License, and you may not initiate litigation (including a cross-claim
472 or counterclaim in a lawsuit) alleging that any patent claim is infringed
473 by making, using, selling, offering for sale, or importing the Program or
475 </p><h2><a id="Patents"></a>
478 A “contributor” is a copyright holder who authorizes use under
479 this License of the Program or a work on which the Program is based. The
480 work thus licensed is called the contributor’s “contributor
483 A contributor’s “essential patent claims” are all patent
484 claims owned or controlled by the contributor, whether already acquired or
485 hereafter acquired, that would be infringed by some manner, permitted by
486 this License, of making, using, or selling its contributor version, but do
487 not include claims that would be infringed only as a consequence of further
488 modification of the contributor version. For purposes of this definition,
489 “control” includes the right to grant patent sublicenses in a
490 manner consistent with the requirements of this License.
492 Each contributor grants you a non-exclusive, worldwide, royalty-free patent
493 license under the contributor’s essential patent claims, to make, use,
494 sell, offer for sale, import and otherwise run, modify and propagate the
495 contents of its contributor version.
497 In the following three paragraphs, a “patent license” is any
498 express agreement or commitment, however denominated, not to enforce a
499 patent (such as an express permission to practice a patent or covenant not
500 to sue for patent infringement). To “grant” such a patent
501 license to a party means to make such an agreement or commitment not to
502 enforce a patent against the party.
504 If you convey a covered work, knowingly relying on a patent license, and the
505 Corresponding Source of the work is not available for anyone to copy, free
506 of charge and under the terms of this License, through a publicly available
507 network server or other readily accessible means, then you must either (1)
508 cause the Corresponding Source to be so available, or (2) arrange to deprive
509 yourself of the benefit of the patent license for this particular work, or
510 (3) arrange, in a manner consistent with the requirements of this License,
511 to extend the patent license to downstream recipients. “Knowingly
512 relying” means you have actual knowledge that, but for the patent
513 license, your conveying the covered work in a country, or your
514 recipient’s use of the covered work in a country, would infringe one
515 or more identifiable patents in that country that you have reason to believe
518 If, pursuant to or in connection with a single transaction or arrangement,
519 you convey, or propagate by procuring conveyance of, a covered work, and
520 grant a patent license to some of the parties receiving the covered work
521 authorizing them to use, propagate, modify or convey a specific copy of the
522 covered work, then the patent license you grant is automatically extended to
523 all recipients of the covered work and works based on it.
525 A patent license is “discriminatory” if it does not include
526 within the scope of its coverage, prohibits the exercise of, or is
527 conditioned on the non-exercise of one or more of the rights that are
528 specifically granted under this License. You may not convey a covered work
529 if you are a party to an arrangement with a third party that is in the
530 business of distributing software, under which you make payment to the third
531 party based on the extent of your activity of conveying the work, and under
532 which the third party grants, to any of the parties who would receive the
533 covered work from you, a discriminatory patent license (a) in connection
534 with copies of the covered work conveyed by you (or copies made from those
535 copies), or (b) primarily for and in connection with specific products or
536 compilations that contain the covered work, unless you entered into that
537 arrangement, or that patent license was granted, prior to 28 March 2007.
539 Nothing in this License shall be construed as excluding or limiting any
540 implied license or other defenses to infringement that may otherwise be
541 available to you under applicable patent law.
542 </p><h2><a id="NoSurrender"></a>
543 12. No Surrender of Others’ Freedom.
545 If conditions are imposed on you (whether by court order, agreement or
546 otherwise) that contradict the conditions of this License, they do not
547 excuse you from the conditions of this License. If you cannot convey a
548 covered work so as to satisfy simultaneously your obligations under this
549 License and any other pertinent obligations, then as a consequence you may
550 not convey it at all. For example, if you agree to terms that obligate you
551 to collect a royalty for further conveying from those to whom you convey the
552 Program, the only way you could satisfy both those terms and this License
553 would be to refrain entirely from conveying the Program.
554 </p><h2><a id="UsedWithAGPL"></a>
555 13. Use with the <acronym class="acronym">GNU</acronym> Affero General Public License.
557 Notwithstanding any other provision of this License, you have permission to
558 link or combine any covered work with a work licensed under version 3 of the
559 <acronym class="acronym">GNU</acronym> Affero General Public License into a single combined
560 work, and to convey the resulting work. The terms of this License will
561 continue to apply to the part which is the covered work, but the special
562 requirements of the <acronym class="acronym">GNU</acronym> Affero General Public License,
563 section 13, concerning interaction through a network will apply to the
565 </p><h2><a id="RevisedVersions"></a>
566 14. Revised Versions of this License.
568 The Free Software Foundation may publish revised and/or new versions of the
569 <acronym class="acronym">GNU</acronym> General Public License from time to time. Such new
570 versions will be similar in spirit to the present version, but may differ in
571 detail to address new problems or concerns.
573 Each version is given a distinguishing version number. If the Program
574 specifies that a certain numbered version of the <acronym class="acronym">GNU</acronym>
575 General Public License “or any later version” applies to it, you
576 have the option of following the terms and conditions either of that
577 numbered version or of any later version published by the Free Software
578 Foundation. If the Program does not specify a version number of the
579 <acronym class="acronym">GNU</acronym> General Public License, you may choose any version
580 ever published by the Free Software Foundation.
582 If the Program specifies that a proxy can decide which future versions of
583 the <acronym class="acronym">GNU</acronym> General Public License can be used, that
584 proxy’s public statement of acceptance of a version permanently
585 authorizes you to choose that version for the Program.
587 Later license versions may give you additional or different permissions.
588 However, no additional obligations are imposed on any author or copyright
589 holder as a result of your choosing to follow a later version.
590 </p><h2><a id="WarrantyDisclaimer"></a>
591 15. Disclaimer of Warranty.
593 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
594 LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
595 OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF
596 ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
597 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
598 THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
599 YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
600 NECESSARY SERVICING, REPAIR OR CORRECTION.
601 </p><h2><a id="LiabilityLimitation"></a>
602 16. Limitation of Liability.
604 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
605 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
606 PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
607 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
608 OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA
609 OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
610 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
611 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
613 </p><h2><a id="InterpretationSecs1516"></a>
614 17. Interpretation of Sections 15 and 16.
616 If the disclaimer of warranty and limitation of liability provided above
617 cannot be given local legal effect according to their terms, reviewing
618 courts shall apply local law that most closely approximates an absolute
619 waiver of all civil liability in connection with the Program, unless a
620 warranty or assumption of liability accompanies a copy of the Program in
622 </p><h2><a id="id592394"></a>
623 END OF TERMS AND CONDITIONS
624 </h2><h2><a id="HowToApply"></a>
625 How to Apply These Terms to Your New Programs
627 If you develop a new program, and you want it to be of the greatest possible
628 use to the public, the best way to achieve this is to make it free software
629 which everyone can redistribute and change under these terms.
631 To do so, attach the following notices to the program. It is safest to
632 attach them to the start of each source file to most effectively state the
633 exclusion of warranty; and each file should have at least the
634 “copyright” line and a pointer to where the full notice is
636 </p><pre class="screen">
637 <em class="replaceable"><code>one line to give the program’s name and a brief idea of what it does.</code></em>
638 Copyright (C) <em class="replaceable"><code>year</code></em> <em class="replaceable"><code>name of author</code></em>
640 This program is free software: you can redistribute it and/or modify
641 it under the terms of the <acronym class="acronym">GNU</acronym> General Public License as published by
642 the Free Software Foundation, either version 3 of the License, or
643 (at your option) any later version.
645 This program is distributed in the hope that it will be useful,
646 but WITHOUT ANY WARRANTY; without even the implied warranty of
647 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
648 <acronym class="acronym">GNU</acronym> General Public License for more details.
650 You should have received a copy of the <acronym class="acronym">GNU</acronym> General Public License
651 along with this program. If not, see <a class="ulink" href="http://www.gnu.org/licenses/" target="_top">http://www.gnu.org/licenses/</a>.
653 Also add information on how to contact you by electronic and paper mail.
655 If the program does terminal interaction, make it output a short notice like
656 this when it starts in an interactive mode:
657 </p><pre class="screen">
658 <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>
659 This program comes with ABSOLUTELY NO WARRANTY; for details type ‘<code class="literal">show w</code>’.
660 This is free software, and you are welcome to redistribute it
661 under certain conditions; type ‘<code class="literal">show c</code>’ for details.
663 The hypothetical commands ‘<code class="literal">show w</code>’ and
664 ‘<code class="literal">show c</code>’ should show the appropriate parts of
665 the General Public License. Of course, your program’s commands might be
666 different; for a GUI interface, you would use an “about box”.
668 You should also get your employer (if you work as a programmer) or school,
669 if any, to sign a “copyright disclaimer” for the program, if
670 necessary. For more information on this, and how to apply and follow the
671 <acronym class="acronym">GNU</acronym> <acronym class="acronym">GPL</acronym>, see
672 <a class="ulink" href="http://www.gnu.org/licenses/" target="_top">http://www.gnu.org/licenses/</a>.
674 The <acronym class="acronym">GNU</acronym> General Public License does not permit
675 incorporating your program into proprietary programs. If your program is a
676 subroutine library, you may consider it more useful to permit linking
677 proprietary applications with the library. If this is what you want to do,
678 use the <acronym class="acronym">GNU</acronym> Lesser General Public License instead of this
679 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>.
680 </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="bk01pt04.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.
681 Free Software Needs Free Documentation
683 </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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