[emacs] manually add bbdb into lisp/bbdb/
[~bandali/configs] / lisp / bbdb / doc / gpl.texi
1 @c The GNU General Public License.
2 @center Version 3, 29 June 2007
3
4 @c This file is intended to be included within another document,
5 @c hence no sectioning command or @node.
6
7 @display
8 Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
9
10 Everyone is permitted to copy and distribute verbatim copies of this
11 license document, but changing it is not allowed.
12 @end display
13
14 @heading Preamble
15
16 The GNU General Public License is a free, copyleft license for
17 software and other kinds of works.
18
19 The licenses for most software and other practical works are designed
20 to take away your freedom to share and change the works. By contrast,
21 the GNU General Public License is intended to guarantee your freedom
22 to share and change all versions of a program---to make sure it remains
23 free software for all its users. We, the Free Software Foundation,
24 use the GNU General Public License for most of our software; it
25 applies also to any other work released this way by its authors. You
26 can apply it to your programs, too.
27
28 When we speak of free software, we are referring to freedom, not
29 price. Our General Public Licenses are designed to make sure that you
30 have the freedom to distribute copies of free software (and charge for
31 them if you wish), that you receive source code or can get it if you
32 want it, that you can change the software or use pieces of it in new
33 free programs, and that you know you can do these things.
34
35 To protect your rights, we need to prevent others from denying you
36 these rights or asking you to surrender the rights. Therefore, you
37 have certain responsibilities if you distribute copies of the
38 software, or if you modify it: responsibilities to respect the freedom
39 of others.
40
41 For example, if you distribute copies of such a program, whether
42 gratis or for a fee, you must pass on to the recipients the same
43 freedoms that you received. You must make sure that they, too,
44 receive or can get the source code. And you must show them these
45 terms so they know their rights.
46
47 Developers that use the GNU GPL protect your rights with two steps:
48 (1) assert copyright on the software, and (2) offer you this License
49 giving you legal permission to copy, distribute and/or modify it.
50
51 For the developers' and authors' protection, the GPL clearly explains
52 that there is no warranty for this free software. For both users' and
53 authors' sake, the GPL requires that modified versions be marked as
54 changed, so that their problems will not be attributed erroneously to
55 authors of previous versions.
56
57 Some devices are designed to deny users access to install or run
58 modified versions of the software inside them, although the
59 manufacturer can do so. This is fundamentally incompatible with the
60 aim of protecting users' freedom to change the software. The
61 systematic pattern of such abuse occurs in the area of products for
62 individuals to use, which is precisely where it is most unacceptable.
63 Therefore, we have designed this version of the GPL to prohibit the
64 practice for those products. If such problems arise substantially in
65 other domains, we stand ready to extend this provision to those
66 domains in future versions of the GPL, as needed to protect the
67 freedom of users.
68
69 Finally, every program is threatened constantly by software patents.
70 States should not allow patents to restrict development and use of
71 software on general-purpose computers, but in those that do, we wish
72 to avoid the special danger that patents applied to a free program
73 could make it effectively proprietary. To prevent this, the GPL
74 assures that patents cannot be used to render the program non-free.
75
76 The precise terms and conditions for copying, distribution and
77 modification follow.
78
79 @heading TERMS AND CONDITIONS
80
81 @enumerate 0
82 @item Definitions.
83
84 ``This License'' refers to version 3 of the GNU General Public License.
85
86 ``Copyright'' also means copyright-like laws that apply to other kinds
87 of works, such as semiconductor masks.
88
89 ``The Program'' refers to any copyrightable work licensed under this
90 License. Each licensee is addressed as ``you''. ``Licensees'' and
91 ``recipients'' may be individuals or organizations.
92
93 To ``modify'' a work means to copy from or adapt all or part of the work
94 in a fashion requiring copyright permission, other than the making of
95 an exact copy. The resulting work is called a ``modified version'' of
96 the earlier work or a work ``based on'' the earlier work.
97
98 A ``covered work'' means either the unmodified Program or a work based
99 on the Program.
100
101 To ``propagate'' a work means to do anything with it that, without
102 permission, would make you directly or secondarily liable for
103 infringement under applicable copyright law, except executing it on a
104 computer or modifying a private copy. Propagation includes copying,
105 distribution (with or without modification), making available to the
106 public, and in some countries other activities as well.
107
108 To ``convey'' a work means any kind of propagation that enables other
109 parties to make or receive copies. Mere interaction with a user
110 through a computer network, with no transfer of a copy, is not
111 conveying.
112
113 An interactive user interface displays ``Appropriate Legal Notices'' to
114 the extent that it includes a convenient and prominently visible
115 feature that (1) displays an appropriate copyright notice, and (2)
116 tells the user that there is no warranty for the work (except to the
117 extent that warranties are provided), that licensees may convey the
118 work under this License, and how to view a copy of this License. If
119 the interface presents a list of user commands or options, such as a
120 menu, a prominent item in the list meets this criterion.
121
122 @item Source Code.
123
124 The ``source code'' for a work means the preferred form of the work for
125 making modifications to it. ``Object code'' means any non-source form
126 of a work.
127
128 A ``Standard Interface'' means an interface that either is an official
129 standard defined by a recognized standards body, or, in the case of
130 interfaces specified for a particular programming language, one that
131 is widely used among developers working in that language.
132
133 The ``System Libraries'' of an executable work include anything, other
134 than the work as a whole, that (a) is included in the normal form of
135 packaging a Major Component, but which is not part of that Major
136 Component, and (b) serves only to enable use of the work with that
137 Major Component, or to implement a Standard Interface for which an
138 implementation is available to the public in source code form. A
139 ``Major Component'', in this context, means a major essential component
140 (kernel, window system, and so on) of the specific operating system
141 (if any) on which the executable work runs, or a compiler used to
142 produce the work, or an object code interpreter used to run it.
143
144 The ``Corresponding Source'' for a work in object code form means all
145 the source code needed to generate, install, and (for an executable
146 work) run the object code and to modify the work, including scripts to
147 control those activities. However, it does not include the work's
148 System Libraries, or general-purpose tools or generally available free
149 programs which are used unmodified in performing those activities but
150 which are not part of the work. For example, Corresponding Source
151 includes interface definition files associated with source files for
152 the work, and the source code for shared libraries and dynamically
153 linked subprograms that the work is specifically designed to require,
154 such as by intimate data communication or control flow between those
155 subprograms and other parts of the work.
156
157 The Corresponding Source need not include anything that users can
158 regenerate automatically from other parts of the Corresponding Source.
159
160 The Corresponding Source for a work in source code form is that same
161 work.
162
163 @item Basic Permissions.
164
165 All rights granted under this License are granted for the term of
166 copyright on the Program, and are irrevocable provided the stated
167 conditions are met. This License explicitly affirms your unlimited
168 permission to run the unmodified Program. The output from running a
169 covered work is covered by this License only if the output, given its
170 content, constitutes a covered work. This License acknowledges your
171 rights of fair use or other equivalent, as provided by copyright law.
172
173 You may make, run and propagate covered works that you do not convey,
174 without conditions so long as your license otherwise remains in force.
175 You may convey covered works to others for the sole purpose of having
176 them make modifications exclusively for you, or provide you with
177 facilities for running those works, provided that you comply with the
178 terms of this License in conveying all material for which you do not
179 control copyright. Those thus making or running the covered works for
180 you must do so exclusively on your behalf, under your direction and
181 control, on terms that prohibit them from making any copies of your
182 copyrighted material outside their relationship with you.
183
184 Conveying under any other circumstances is permitted solely under the
185 conditions stated below. Sublicensing is not allowed; section 10
186 makes it unnecessary.
187
188 @item Protecting Users' Legal Rights From Anti-Circumvention Law.
189
190 No covered work shall be deemed part of an effective technological
191 measure under any applicable law fulfilling obligations under article
192 11 of the WIPO copyright treaty adopted on 20 December 1996, or
193 similar laws prohibiting or restricting circumvention of such
194 measures.
195
196 When you convey a covered work, you waive any legal power to forbid
197 circumvention of technological measures to the extent such
198 circumvention is effected by exercising rights under this License with
199 respect to the covered work, and you disclaim any intention to limit
200 operation or modification of the work as a means of enforcing, against
201 the work's users, your or third parties' legal rights to forbid
202 circumvention of technological measures.
203
204 @item Conveying Verbatim Copies.
205
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
208 appropriately publish on each copy an appropriate copyright notice;
209 keep intact all notices stating that this License and any
210 non-permissive terms added in accord with section 7 apply to the code;
211 keep intact all notices of the absence of any warranty; and give all
212 recipients a copy of this License along with the Program.
213
214 You may charge any price or no price for each copy that you convey,
215 and you may offer support or warranty protection for a fee.
216
217 @item Conveying Modified Source Versions.
218
219 You may convey a work based on the Program, or the modifications to
220 produce it from the Program, in the form of source code under the
221 terms of section 4, provided that you also meet all of these
222 conditions:
223
224 @enumerate a
225 @item
226 The work must carry prominent notices stating that you modified it,
227 and giving a relevant date.
228
229 @item
230 The work must carry prominent notices stating that it is released
231 under this License and any conditions added under section 7. This
232 requirement modifies the requirement in section 4 to ``keep intact all
233 notices''.
234
235 @item
236 You must license the entire work, as a whole, under this License to
237 anyone who comes into possession of a copy. This License will
238 therefore apply, along with any applicable section 7 additional terms,
239 to the whole of the work, and all its parts, regardless of how they
240 are packaged. This License gives no permission to license the work in
241 any other way, but it does not invalidate such permission if you have
242 separately received it.
243
244 @item
245 If the work has interactive user interfaces, each must display
246 Appropriate Legal Notices; however, if the Program has interactive
247 interfaces that do not display Appropriate Legal Notices, your work
248 need not make them do so.
249 @end enumerate
250
251 A compilation of a covered work with other separate and independent
252 works, which are not by their nature extensions of the covered work,
253 and which are not combined with it such as to form a larger program,
254 in or on a volume of a storage or distribution medium, is called an
255 ``aggregate'' if the compilation and its resulting copyright are not
256 used to limit the access or legal rights of the compilation's users
257 beyond what the individual works permit. Inclusion of a covered work
258 in an aggregate does not cause this License to apply to the other
259 parts of the aggregate.
260
261 @item Conveying Non-Source Forms.
262
263 You may convey a covered work in object code form under the terms of
264 sections 4 and 5, provided that you also convey the machine-readable
265 Corresponding Source under the terms of this License, in one of these
266 ways:
267
268 @enumerate a
269 @item
270 Convey the object code in, or embodied in, a physical product
271 (including a physical distribution medium), accompanied by the
272 Corresponding Source fixed on a durable physical medium customarily
273 used for software interchange.
274
275 @item
276 Convey the object code in, or embodied in, a physical product
277 (including a physical distribution medium), accompanied by a written
278 offer, valid for at least three years and valid for as long as you
279 offer spare parts or customer support for that product model, to give
280 anyone who possesses the object code either (1) a copy of the
281 Corresponding Source for all the software in the product that is
282 covered by this License, on a durable physical medium customarily used
283 for software interchange, for a price no more than your reasonable
284 cost of physically performing this conveying of source, or (2) access
285 to copy the Corresponding Source from a network server at no charge.
286
287 @item
288 Convey individual copies of the object code with a copy of the written
289 offer to provide the Corresponding Source. This alternative is
290 allowed only occasionally and noncommercially, and only if you
291 received the object code with such an offer, in accord with subsection
292 6b.
293
294 @item
295 Convey the object code by offering access from a designated place
296 (gratis or for a charge), and offer equivalent access to the
297 Corresponding Source in the same way through the same place at no
298 further charge. You need not require recipients to copy the
299 Corresponding Source along with the object code. If the place to copy
300 the object code is a network server, the Corresponding Source may be
301 on a different server (operated by you or a third party) that supports
302 equivalent copying facilities, provided you maintain clear directions
303 next to the object code saying where to find the Corresponding Source.
304 Regardless of what server hosts the Corresponding Source, you remain
305 obligated to ensure that it is available for as long as needed to
306 satisfy these requirements.
307
308 @item
309 Convey the object code using peer-to-peer transmission, provided you
310 inform other peers where the object code and Corresponding Source of
311 the work are being offered to the general public at no charge under
312 subsection 6d.
313
314 @end enumerate
315
316 A separable portion of the object code, whose source code is excluded
317 from the Corresponding Source as a System Library, need not be
318 included in conveying the object code work.
319
320 A ``User Product'' is either (1) a ``consumer product'', which means any
321 tangible personal property which is normally used for personal,
322 family, or household purposes, or (2) anything designed or sold for
323 incorporation into a dwelling. In determining whether a product is a
324 consumer product, doubtful cases shall be resolved in favor of
325 coverage. For a particular product received by a particular user,
326 ``normally used'' refers to a typical or common use of that class of
327 product, regardless of the status of the particular user or of the way
328 in which the particular user actually uses, or expects or is expected
329 to use, the product. A product is a consumer product regardless of
330 whether the product has substantial commercial, industrial or
331 non-consumer uses, unless such uses represent the only significant
332 mode of use of the product.
333
334 ``Installation Information'' for a User Product means any methods,
335 procedures, authorization keys, or other information required to
336 install and execute modified versions of a covered work in that User
337 Product from a modified version of its Corresponding Source. The
338 information must suffice to ensure that the continued functioning of
339 the modified object code is in no case prevented or interfered with
340 solely because modification has been made.
341
342 If you convey an object code work under this section in, or with, or
343 specifically for use in, a User Product, and the conveying occurs as
344 part of a transaction in which the right of possession and use of the
345 User Product is transferred to the recipient in perpetuity or for a
346 fixed term (regardless of how the transaction is characterized), the
347 Corresponding Source conveyed under this section must be accompanied
348 by the Installation Information. But this requirement does not apply
349 if neither you nor any third party retains the ability to install
350 modified object code on the User Product (for example, the work has
351 been installed in ROM).
352
353 The requirement to provide Installation Information does not include a
354 requirement to continue to provide support service, warranty, or
355 updates for a work that has been modified or installed by the
356 recipient, or for the User Product in which it has been modified or
357 installed. Access to a network may be denied when the modification
358 itself materially and adversely affects the operation of the network
359 or violates the rules and protocols for communication across the
360 network.
361
362 Corresponding Source conveyed, and Installation Information provided,
363 in accord with this section must be in a format that is publicly
364 documented (and with an implementation available to the public in
365 source code form), and must require no special password or key for
366 unpacking, reading or copying.
367
368 @item Additional Terms.
369
370 ``Additional permissions'' are terms that supplement the terms of this
371 License by making exceptions from one or more of its conditions.
372 Additional permissions that are applicable to the entire Program shall
373 be treated as though they were included in this License, to the extent
374 that they are valid under applicable law. If additional permissions
375 apply only to part of the Program, that part may be used separately
376 under those permissions, but the entire Program remains governed by
377 this License without regard to the additional permissions.
378
379 When you convey a copy of a covered work, you may at your option
380 remove any additional permissions from that copy, or from any part of
381 it. (Additional permissions may be written to require their own
382 removal in certain cases when you modify the work.) You may place
383 additional permissions on material, added by you to a covered work,
384 for which you have or can give appropriate copyright permission.
385
386 Notwithstanding any other provision of this License, for material you
387 add to a covered work, you may (if authorized by the copyright holders
388 of that material) supplement the terms of this License with terms:
389
390 @enumerate a
391 @item
392 Disclaiming warranty or limiting liability differently from the terms
393 of sections 15 and 16 of this License; or
394
395 @item
396 Requiring preservation of specified reasonable legal notices or author
397 attributions in that material or in the Appropriate Legal Notices
398 displayed by works containing it; or
399
400 @item
401 Prohibiting misrepresentation of the origin of that material, or
402 requiring that modified versions of such material be marked in
403 reasonable ways as different from the original version; or
404
405 @item
406 Limiting the use for publicity purposes of names of licensors or
407 authors of the material; or
408
409 @item
410 Declining to grant rights under trademark law for use of some trade
411 names, trademarks, or service marks; or
412
413 @item
414 Requiring indemnification of licensors and authors of that material by
415 anyone who conveys the material (or modified versions of it) with
416 contractual assumptions of liability to the recipient, for any
417 liability that these contractual assumptions directly impose on those
418 licensors and authors.
419 @end enumerate
420
421 All other non-permissive additional terms are considered ``further
422 restrictions'' within the meaning of section 10. If the Program as you
423 received it, or any part of it, contains a notice stating that it is
424 governed by this License along with a term that is a further
425 restriction, you may remove that term. If a license document contains
426 a further restriction but permits relicensing or conveying under this
427 License, you may add to a covered work material governed by the terms
428 of that license document, provided that the further restriction does
429 not survive such relicensing or conveying.
430
431 If you add terms to a covered work in accord with this section, you
432 must place, in the relevant source files, a statement of the
433 additional terms that apply to those files, or a notice indicating
434 where to find the applicable terms.
435
436 Additional terms, permissive or non-permissive, may be stated in the
437 form of a separately written license, or stated as exceptions; the
438 above requirements apply either way.
439
440 @item Termination.
441
442 You may not propagate or modify a covered work except as expressly
443 provided under this License. Any attempt otherwise to propagate or
444 modify it is void, and will automatically terminate your rights under
445 this License (including any patent licenses granted under the third
446 paragraph of section 11).
447
448 However, if you cease all violation of this License, then your license
449 from a particular copyright holder is reinstated (a) provisionally,
450 unless and until the copyright holder explicitly and finally
451 terminates your license, and (b) permanently, if the copyright holder
452 fails to notify you of the violation by some reasonable means prior to
453 60 days after the cessation.
454
455 Moreover, your license from a particular copyright holder is
456 reinstated permanently if the copyright holder notifies you of the
457 violation by some reasonable means, this is the first time you have
458 received notice of violation of this License (for any work) from that
459 copyright holder, and you cure the violation prior to 30 days after
460 your receipt of the notice.
461
462 Termination of your rights under this section does not terminate the
463 licenses of parties who have received copies or rights from you under
464 this License. If your rights have been terminated and not permanently
465 reinstated, you do not qualify to receive new licenses for the same
466 material under section 10.
467
468 @item Acceptance Not Required for Having Copies.
469
470 You are not required to accept this License in order to receive or run
471 a copy of the Program. Ancillary propagation of a covered work
472 occurring solely as a consequence of using peer-to-peer transmission
473 to receive a copy likewise does not require acceptance. However,
474 nothing other than this License grants you permission to propagate or
475 modify any covered work. These actions infringe copyright if you do
476 not accept this License. Therefore, by modifying or propagating a
477 covered work, you indicate your acceptance of this License to do so.
478
479 @item Automatic Licensing of Downstream Recipients.
480
481 Each time you convey a covered work, the recipient automatically
482 receives a license from the original licensors, to run, modify and
483 propagate that work, subject to this License. You are not responsible
484 for enforcing compliance by third parties with this License.
485
486 An ``entity transaction'' is a transaction transferring control of an
487 organization, or substantially all assets of one, or subdividing an
488 organization, or merging organizations. If propagation of a covered
489 work results from an entity transaction, each party to that
490 transaction who receives a copy of the work also receives whatever
491 licenses to the work the party's predecessor in interest had or could
492 give under the previous paragraph, plus a right to possession of the
493 Corresponding Source of the work from the predecessor in interest, if
494 the predecessor has it or can get it with reasonable efforts.
495
496 You may not impose any further restrictions on the exercise of the
497 rights granted or affirmed under this License. For example, you may
498 not impose a license fee, royalty, or other charge for exercise of
499 rights granted under this License, and you may not initiate litigation
500 (including a cross-claim or counterclaim in a lawsuit) alleging that
501 any patent claim is infringed by making, using, selling, offering for
502 sale, or importing the Program or any portion of it.
503
504 @item Patents.
505
506 A ``contributor'' is a copyright holder who authorizes use under this
507 License of the Program or a work on which the Program is based. The
508 work thus licensed is called the contributor's ``contributor version''.
509
510 A contributor's ``essential patent claims'' are all patent claims owned
511 or controlled by the contributor, whether already acquired or
512 hereafter acquired, that would be infringed by some manner, permitted
513 by this License, of making, using, or selling its contributor version,
514 but do not include claims that would be infringed only as a
515 consequence of further modification of the contributor version. For
516 purposes of this definition, ``control'' includes the right to grant
517 patent sublicenses in a manner consistent with the requirements of
518 this License.
519
520 Each contributor grants you a non-exclusive, worldwide, royalty-free
521 patent license under the contributor's essential patent claims, to
522 make, use, sell, offer for sale, import and otherwise run, modify and
523 propagate the contents of its contributor version.
524
525 In the following three paragraphs, a ``patent license'' is any express
526 agreement or commitment, however denominated, not to enforce a patent
527 (such as an express permission to practice a patent or covenant not to
528 sue for patent infringement). To ``grant'' such a patent license to a
529 party means to make such an agreement or commitment not to enforce a
530 patent against the party.
531
532 If you convey a covered work, knowingly relying on a patent license,
533 and the Corresponding Source of the work is not available for anyone
534 to copy, free of charge and under the terms of this License, through a
535 publicly available network server or other readily accessible means,
536 then you must either (1) cause the Corresponding Source to be so
537 available, or (2) arrange to deprive yourself of the benefit of the
538 patent license for this particular work, or (3) arrange, in a manner
539 consistent with the requirements of this License, to extend the patent
540 license to downstream recipients. ``Knowingly relying'' means you have
541 actual knowledge that, but for the patent license, your conveying the
542 covered work in a country, or your recipient's use of the covered work
543 in a country, would infringe one or more identifiable patents in that
544 country that you have reason to believe are valid.
545
546 If, pursuant to or in connection with a single transaction or
547 arrangement, you convey, or propagate by procuring conveyance of, a
548 covered work, and grant a patent license to some of the parties
549 receiving the covered work authorizing them to use, propagate, modify
550 or convey a specific copy of the covered work, then the patent license
551 you grant is automatically extended to all recipients of the covered
552 work and works based on it.
553
554 A patent license is ``discriminatory'' if it does not include within the
555 scope of its coverage, prohibits the exercise of, or is conditioned on
556 the non-exercise of one or more of the rights that are specifically
557 granted under this License. You may not convey a covered work if you
558 are a party to an arrangement with a third party that is in the
559 business of distributing software, under which you make payment to the
560 third party based on the extent of your activity of conveying the
561 work, and under which the third party grants, to any of the parties
562 who would receive the covered work from you, a discriminatory patent
563 license (a) in connection with copies of the covered work conveyed by
564 you (or copies made from those copies), or (b) primarily for and in
565 connection with specific products or compilations that contain the
566 covered work, unless you entered into that arrangement, or that patent
567 license was granted, prior to 28 March 2007.
568
569 Nothing in this License shall be construed as excluding or limiting
570 any implied license or other defenses to infringement that may
571 otherwise be available to you under applicable patent law.
572
573 @item No Surrender of Others' Freedom.
574
575 If conditions are imposed on you (whether by court order, agreement or
576 otherwise) that contradict the conditions of this License, they do not
577 excuse you from the conditions of this License. If you cannot convey
578 a covered work so as to satisfy simultaneously your obligations under
579 this License and any other pertinent obligations, then as a
580 consequence you may not convey it at all. For example, if you agree
581 to terms that obligate you to collect a royalty for further conveying
582 from those to whom you convey the Program, the only way you could
583 satisfy both those terms and this License would be to refrain entirely
584 from conveying the Program.
585
586 @item Use with the GNU Affero General Public License.
587
588 Notwithstanding any other provision of this License, you have
589 permission to link or combine any covered work with a work licensed
590 under version 3 of the GNU Affero General Public License into a single
591 combined work, and to convey the resulting work. The terms of this
592 License will continue to apply to the part which is the covered work,
593 but the special requirements of the GNU Affero General Public License,
594 section 13, concerning interaction through a network will apply to the
595 combination as such.
596
597 @item Revised Versions of this License.
598
599 The Free Software Foundation may publish revised and/or new versions
600 of the GNU General Public License from time to time. Such new
601 versions will be similar in spirit to the present version, but may
602 differ in detail to address new problems or concerns.
603
604 Each version is given a distinguishing version number. If the Program
605 specifies that a certain numbered version of the GNU General Public
606 License ``or any later version'' applies to it, you have the option of
607 following the terms and conditions either of that numbered version or
608 of any later version published by the Free Software Foundation. If
609 the Program does not specify a version number of the GNU General
610 Public License, you may choose any version ever published by the Free
611 Software Foundation.
612
613 If the Program specifies that a proxy can decide which future versions
614 of the GNU General Public License can be used, that proxy's public
615 statement of acceptance of a version permanently authorizes you to
616 choose that version for the Program.
617
618 Later license versions may give you additional or different
619 permissions. However, no additional obligations are imposed on any
620 author or copyright holder as a result of your choosing to follow a
621 later version.
622
623 @item Disclaimer of Warranty.
624
625 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
626 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
627 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT
628 WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
629 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
630 A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
631 PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
632 DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
633 CORRECTION.
634
635 @item Limitation of Liability.
636
637 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
638 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
639 CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
640 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
641 ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
642 NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
643 LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
644 TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
645 PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
646
647 @item Interpretation of Sections 15 and 16.
648
649 If the disclaimer of warranty and limitation of liability provided
650 above cannot be given local legal effect according to their terms,
651 reviewing courts shall apply local law that most closely approximates
652 an absolute waiver of all civil liability in connection with the
653 Program, unless a warranty or assumption of liability accompanies a
654 copy of the Program in return for a fee.
655
656 @end enumerate
657
658 @heading END OF TERMS AND CONDITIONS
659
660 @heading How to Apply These Terms to Your New Programs
661
662 If you develop a new program, and you want it to be of the greatest
663 possible use to the public, the best way to achieve this is to make it
664 free software which everyone can redistribute and change under these
665 terms.
666
667 To do so, attach the following notices to the program. It is safest
668 to attach them to the start of each source file to most effectively
669 state the exclusion of warranty; and each file should have at least
670 the ``copyright'' line and a pointer to where the full notice is found.
671
672 @smallexample
673 @var{one line to give the program's name and a brief idea of what it does.}
674 Copyright (C) @var{year} @var{name of author}
675
676 This program is free software: you can redistribute it and/or modify
677 it under the terms of the GNU General Public License as published by
678 the Free Software Foundation, either version 3 of the License, or (at
679 your option) any later version.
680
681 This program is distributed in the hope that it will be useful, but
682 WITHOUT ANY WARRANTY; without even the implied warranty of
683 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
684 General Public License for more details.
685
686 You should have received a copy of the GNU General Public License
687 along with this program. If not, see @url{http://www.gnu.org/licenses/}.
688 @end smallexample
689
690 Also add information on how to contact you by electronic and paper mail.
691
692 If the program does terminal interaction, make it output a short
693 notice like this when it starts in an interactive mode:
694
695 @smallexample
696 @var{program} Copyright (C) @var{year} @var{name of author}
697 This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}.
698 This is free software, and you are welcome to redistribute it
699 under certain conditions; type @samp{show c} for details.
700 @end smallexample
701
702 The hypothetical commands @samp{show w} and @samp{show c} should show
703 the appropriate parts of the General Public License. Of course, your
704 program's commands might be different; for a GUI interface, you would
705 use an ``about box''.
706
707 You should also get your employer (if you work as a programmer) or school,
708 if any, to sign a ``copyright disclaimer'' for the program, if necessary.
709 For more information on this, and how to apply and follow the GNU GPL, see
710 @url{http://www.gnu.org/licenses/}.
711
712 The GNU General Public License does not permit incorporating your
713 program into proprietary programs. If your program is a subroutine
714 library, you may consider it more useful to permit linking proprietary
715 applications with the library. If this is what you want to do, use
716 the GNU Lesser General Public License instead of this License. But
717 first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}.