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GNU Free Documentation License

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software license whatsoever. So if you write a new program, and you have no commitments at all about what license you want to use, saving only that it be a free license, you cannot include GFDL'd text. The GNU FDL, as it stands today, does not meet the Debian Free Software Guidelines. There are significant problems with the license, as detailed above; and, as such, we cannot accept works licensed under the GNU FDL into our distribution.
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the GNU FDL, they must also include a copyright notice and a physical printout of the GNU FDL, which is a significantly large document in itself. Worse, the same is required for the standalone use of just one (for example, Knowledge) image. Several Wikimedia projects have over the years abandoned the use of GFDL, among them the English Knowledge, which has relicensed the files.
361:, version 1.3 added a time-limited section allowing specific types of websites using the GFDL to additionally offer their work under the CC BY-SA license. These exemptions allow a GFDL-based collaborative project with multiple authors to transition to the CC BY-SA 3.0 license, without first obtaining the permission of every author, if the work satisfies several conditions: 213:, giving readers the rights to copy, redistribute, and modify (except for "invariant sections") a work and requires all copies and derivatives to be available under the same license. Copies may also be sold commercially, but, if produced in larger quantities (greater than 100), the original document or source code must be made available to the work's recipient. 554:
By expressing LGPL as just an additional permission on top of GPL we simplify our licensing landscape drastically. It's like for physics getting rid of a force, right? We just unified electro-weak, ok? The grand unified field theory still escapes us until the document licences too are just additional
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The goal of invariant sections, ever since the 80s when we first made the GNU Manifesto an invariant section in the Emacs Manual, was to make sure they could not be removed. Specifically, to make sure that distributors of Emacs that also distribute non-free software could not remove the statements of
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The license explicitly separates any kind of "Document" from "Secondary Sections", which may not be integrated with the Document, but exist as front-matter materials or appendices. Secondary sections can contain information regarding the author's or publisher's relationship to the subject matter, but
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It is not possible to borrow text from a GFDL'd manual and incorporate it in any free software program whatsoever. This is not a mere license incompatibility. It's not just that the GFDL is incompatible with this or that free software license: it's that it is fundamentally incompatible with any free
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With the transition, the Knowledge community will now be allowed to import CC-BY-SA text from external sources into articles. If you do this, the origin of the material and its license should be explicitly noted in the edit summary. If the source text is dual- or multi-licensed, it is only necessary
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The GNU FDL requires that licensees, when printing a document covered by the license, must also include "this License, the copyright notices, and the license notice saying this License applies to the Document". This means that if a licensee prints out a copy of an article whose text is covered under
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If external content originally published on a MMC is present on the site, the work must have been licensed under Version 1.3 of the GNU FDL, or an earlier version but with the "or any later version" declaration, with no cover texts or invariant sections. If it was not originally published on an MMC,
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The GFDL is meant as a way to enlist commercial publishers in funding free documentation without surrendering any vital liberty. The 'cover text' feature, and certain other aspects of the license that deal with covers, title page, history, and endorsements, are included to make the license appealing
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A GNU FDL work can quickly be encumbered because a new, different title must be given and a list of previous titles must be kept. This could lead to the situation where there are a whole series of title pages, and dedications, in each and every copy of the book if it has a long lineage. These pages
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To prevent the clause from being used as a general compatibility measure, the license itself only allowed the change to occur before August 1, 2009. At the release of version 1.3, the FSF stated that all content added before November 1, 2008, to Knowledge as an example satisfied the conditions. The
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Specifically, the authors of prior versions have to be acknowledged and certain "invariant sections" specified by the original author and dealing with his or her relationship to the subject matter may not be changed. If the material is modified, its title has to be changed (unless the prior authors
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provided that the invariant section clauses are not used. However, their resolution stated that even without invariant sections, GFDL-licensed software documentation is considered to be "still not free of trouble" by the project, namely because of its incompatibility with the major free software
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foundation, an organization devoted to creating manuals for free software, decided to eschew the GFDL in favor of the GPL for its texts in 2007, citing the incompatibility between the two, difficulties in implementing the GFDL, and the fact that the GFDL "does not allow for easy duplication and
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FSF, a Free Software organization, isn't being entirely true to the Free Software ethos while it is promoting a license that allows invariant sections to be applied to anything but the license text and attribution. FSF is not Creative Commons:the documentation that FSF handles is an essential
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The license also has provisions for the handling of front-cover and back-cover texts of books, as well as for "History", "Acknowledgements", "Dedications" and "Endorsements" sections. These features were added in part to make the license more financially attractive to commercial publishers of
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The GFDL requires the ability to "copy and distribute the Document in any medium, either commercially or noncommercially" and therefore is incompatible with material that excludes commercial re-use. As mentioned above, the GFDL was designed with commercial publishers in mind, as Stallman
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The full text of the license, unmodified invariant sections as defined by the author if any, and any other added warranty disclaimers (such as a general disclaimer alerting readers that the document may not be accurate for example) and copyright notices from previous versions must be
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software documentation, some of whom were consulted during the drafting of the GFDL. "Endorsements" sections are intended to be used in official standard documents, where the distribution of modified versions should only be permitted if they are not labeled as that standard anymore.
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This means that you cannot publish them under DRM systems to restrict the possessors of the copies. It isn't supposed to refer to use of encryption or file access control on your own copy. I will talk with our lawyer and see if that sentence needs to be
410:, no contributors have ever tried to bring an organization to court due to violation of the GFDL. In the case of Baidu, Knowledge representatives asked the site and its contributors to respect the terms of the licenses and to make proper attributions. 253:(CC BY-SA) license. These changes were implemented on version 1.3 of the license, which includes a new provision allowing certain materials released under the (GFDL) license to be used under a Creative Commons Attribution Share-Alike license also. 1118:" on Diff by Erik Moeller on June 30, 2009, "Perhaps the most significant reason to choose CC-BY-SA as our primary content license was to be compatible with many of the other admirable endeavors out there to share and develop free knowledge". 486:
A criticism of this language is that it is too broad, because it applies to private copies made but not distributed. This means that a licensee is not allowed to save document copies "made" in a proprietary file format or using encryption.
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and others had produced a proposal supported by both the FSF and Creative Commons to modify the Free Documentation License in such a fashion as to allow the possibility for the Wikimedia Foundation to migrate the projects to the similar
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The GFDL was released in draft form for feedback in September 1999. After revisions, version 1.1 was issued in March 2000, version 1.2 in November 2002, and version 1.3 in November 2008. The current state of the license is version 1.3.
220:, textbooks, other reference and instructional materials, and documentation which often accompanies GNU software. However, it can be used for any text-based work, regardless of subject matter. For example, the free online encyclopedia 545:
in both directions with the GPL—material under the GNU FDL cannot be put into GPL code and GPL code cannot be put into a GNU FDL manual. At the June 22–23, 2006 international GPLv3 conference in Barcelona,
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ethos while it is promoting a license that allows invariant sections to be applied to anything but the license text and attribution. the GFDL isn't consistent with the ethos that FSF has promoted for 19
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in some other countries) and does not need to be licensed to fall within the GFDL if such fair use is covered by all potential subsequent uses. One example of such liberal and commercial fair use is
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Some critics consider the GFDL a non-free license. Some reasons for this are that the GFDL allows "invariant" text which cannot be modified or removed, and that its prohibition against
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Material that restricts commercial re-use is incompatible with the license and cannot be incorporated into the work. However, incorporating such restricted material may be
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not any subject matter itself. While the Document itself is wholly editable and is essentially covered by a license equivalent to (but mutually incompatible with) the
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component of FSF's Free Software, and should be treated as such. In that light, the GFDL isn't consistent with the ethos that FSF has promoted for 19 years.
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that at least one of the licenses is compatible with CC-BY-SA. It is not necessary that external content be dual licensed under the GFDL.
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Material licensed under the current version of the license can be used for any purpose, as long as the use meets certain conditions.
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announced that a long period of discussion and negotiation between and amongst the Free Software Foundation, Creative Commons, the
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license in June 2009, and adopted a foundation-wide attribution policy for the use of content from Wikimedia Foundation projects.
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You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute.
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travel guides, chose not to use the GFDL from the beginning because it considers it unsuitable for short printed texts.
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There have currently been no cases involving the GFDL in a court of law, although its sister license for software, the
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General Resolution: Why the GNU Free Documentation License is not suitable for Debian main – Amendment Text A
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The work must have been produced on a "Massive Multiauthor Collaboration Site" (MMC), such as a public
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permissions on top of GPL. I don't know how we'll ever get there, that's gravity, it's really hard.
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Although the two licenses work on similar copyleft principles, the GFDL is not compatible with the
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our philosophy, which they might think of doing because those statements criticize their actions.
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In 2006, Debian developers voted to consider works licensed under the GFDL to comply with their
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have raised objections. Bruce Perens saw the GFDL even outside the "Free Software ethos":
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Frequently Asked Questions about the GNU Licenses: Why don't you use the GPL for manuals?
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and may never be able to satisfy particular standards for completeness. You can help by
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Those opposed to the GFDL have recommended the use of alternative licenses such as the
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hinted that a future version of the GPL could be made suitable for documentation:
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has been plagiarized and used in violation of the GFDL by other sites, such as
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Wikimedia Foundation itself after a public referendum, invoked this process to
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may not be used to control or obstruct distribution or editing of the document.
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Listen to the GFDL (0:23:28) version 1.2, November 2002, (recorded 2005-05-28)
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Audio recording of the full text of the GNU Free Documentation License.
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said about the above sentence on the debian-legal mailing list:
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to commercial publishers for books whose authors are paid.
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Copyleft license primarily for free software documentation
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FSF guide to the new drafts of documentation licenses
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modification", especially for digital documentation.
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if it were added to an MMC before November 1, 2008.
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Compatibility with Creative Commons licensing terms
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For other uses, see 1666: 1652: 1260: 1212: 1179: 386:content released under the GFDL under the 171: 1048: 1046: 265:All previous authors of the work must be 1439: 1408: 1377: 1267:Nerode, Nathanael (September 24, 2003). 704:The specification documents that define 559: 279:must be licensed under the same license. 251:Creative Commons Attribution Share-Alike 201:for free documentation, designed by the 1496:. Notablog.notafish.com. April 21, 2005 1378:Stallman, Richard (September 6, 2003). 1186:Nerode, Nathanael (December 10, 2007). 1026:"Why publishers should use the GNU FDL" 906:Richard Stallman (September 12, 1999). 272:All changes to the work must be logged. 240:On December 1, 2007, Knowledge founder 2097:Free and open-source software licenses 2064: 1551: 1514: 1452:from the original on December 8, 2023. 1266: 1185: 1094:"Resolution:Licensing update approval" 1043: 971: 334:under United States copyright law (or 1647: 1515:Corbet, Jonathan (November 5, 2008). 1421:from the original on October 23, 2023 1409:Stallman, Richard (August 23, 2003). 1390:from the original on October 23, 2023 1127: 1065: 1019: 1017: 972:Lessig, Lawrence (December 1, 2007). 523:said about invariant sections on the 503: 294: 1764:GNAT Modified General Public License 1631:Apple's Common Documentation License 1442:"Re: Proposed statement wrt GNU FDL" 1440:Braakman, Richard (April 20, 2003). 1302:"stepping in between Debian and FSF" 1104:from the original on August 2, 2020. 1098:Wikimedia Foundation Governance Wiki 1023: 856:"WIKIPEDIA MOVES TO CC 4.0 LICENSES" 744:Free and open-source software portal 680:– artist descriptions are under GFDL 673:Free On-line Dictionary of Computing 478:The GNU FDL contains the statement: 1517:"GFDL 1.3: Knowledge's exit permit" 1446:Debian Mailing Lists – debian-legal 1415:Debian Mailing Lists – debian-legal 1384:Debian Mailing Lists – debian-legal 1269:"Why You Shouldn't Use the GNU FDL" 1234: 1188:"Why You Shouldn't Use the GNU FDL" 537:GPL incompatible in both directions 13: 1570: 1014: 624:List of projects that use the GFDL 77:November 3, 2008 (current version) 14: 2113: 1754:GNU Affero General Public License 1749:GNU Lesser General Public License 1563: 1335:". 2006. (Accessed June 20, 2009) 710:enterprise architecture framework 1604:Problems playing this file? See 1586: 1411:"Re: A possible GFDL compromise" 1380:"Re: A possible GFDL compromise" 1163:. August 6, 2007. Archived from 1128:Jones, Pamela (August 3, 2010). 736: 224:uses the GFDL (coupled with the 34: 1673: 1545: 1534: 1508: 1486: 1470:. June 22, 2006. Archived from 1468:Free Software Foundation Europe 1456: 1433: 1402: 1371: 1338: 1304:. lists.debian.org/debian-legal 1206: 1149: 1121: 1108: 1086: 1059: 452:Debian Free Software Guidelines 357:However, at the request of the 1759:GNU Free Documentation License 1625:Free Software and Free Manuals 1355:. June 6, 2007. Archived from 992: 965: 899: 874: 848: 830: 805: 712:, are released under the GFDL. 393: 184:GNU Free Documentation License 69:Free Software Foundation, Inc. 29:GNU Free Documentation License 1: 976:. Lessig Blog. Archived from 799: 598:FreeBSD Documentation License 577:Other licenses for free works 473: 308:permit to retain the title). 256: 2034:GNU/Linux naming controversy 838:"Knowledge:Licensing update" 413: 7: 1627:, essay by Richard Stallman 1066:Walsh, Jay (May 21, 2009). 1000:"Resolution:License update" 729: 691:(now uses CC BY-SA license) 286:Technical measures such as 10: 2118: 2102:Copyleft software licenses 1732:GNU General Public License 1552:Judson, Thomas W. (2015). 1213:Srivastava, Manoj (2006). 778:Non-commercial educational 627: 569:, a web site dedicated to 400:GNU General Public License 302:GNU General Public License 231: 216:The GFDL was designed for 211:GNU General Public License 18: 2026: 1970: 1772: 1724: 1681: 684:Marxists Internet Archive 583:Creative Commons licenses 420:digital rights management 316:Commercial redistribution 148: 138: 128: 118: 81: 73: 63: 55: 45: 33: 2092:Free Software Foundation 1716:History of free software 1694:Free Software Foundation 1640:, an alternative license 613:Open Publication License 433:, Nathanael Nerode, and 203:Free Software Foundation 50:Free Software Foundation 1636:March 31, 2009, at the 209:. It is similar to the 2082:Software documentation 1575: 1074:. Wikimedia Foundation 1002:. Wikimedia Foundation 588:Design Science License 557: 534: 501: 484: 448: 328: 2077:Free content licenses 1574: 1300:(September 2, 2003). 768:Free software license 644:Most projects of the 560:Burdens when printing 552: 529: 496: 480: 439: 323: 120:Debian FSG compatible 21:GFDL (disambiguation) 1359:on February 28, 2008 1194:on December 10, 2007 718:by Thomas W. Judson. 646:Wikimedia Foundation 634:adding missing items 603:Open Content License 359:Wikimedia Foundation 246:Wikimedia Foundation 2051:Defective by Design 2018:Richard M. Stallman 1024:Stallman, Richard. 980:on October 26, 2011 30: 1983:Benjamin Mako Hill 1620:GFDL official text 1576: 1275:on October 9, 2003 793:Software licensing 723:Baseball-Reference 504:Invariant sections 295:Secondary sections 28: 2059: 2058: 2003:Georg C. F. Greve 1910:GNU Privacy Guard 1737:linking exception 1591: 1474:on August 7, 2011 1167:on April 21, 2016 840:. June 14, 2009. 813:"Knowledge:About" 608:Open Game License 180: 179: 112:see list for more 103:GFDL-1.1-or-later 97:GFDL-1.2-or-later 91:GFDL-1.3-or-later 2109: 1668: 1661: 1654: 1645: 1644: 1593: 1592: 1573: 1558: 1557: 1549: 1543: 1538: 1532: 1531: 1529: 1527: 1512: 1506: 1505: 1503: 1501: 1490: 1484: 1483: 1481: 1479: 1460: 1454: 1453: 1437: 1431: 1430: 1428: 1426: 1406: 1400: 1399: 1397: 1395: 1375: 1369: 1368: 1366: 1364: 1346:"License Change" 1342: 1336: 1329: 1318: 1317: 1311: 1309: 1294: 1285: 1284: 1282: 1280: 1271:. Archived from 1264: 1258: 1257: 1255: 1253: 1248:on July 13, 2012 1238: 1232: 1231: 1223: 1221: 1210: 1204: 1203: 1201: 1199: 1190:. 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