GNU Free Documentation License: Difference between revisions

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{{Short description|Copyleft license primarily for free software documentation}}
{{Short description|Copyleft license primarily for free software documentation}}
{{Redirect|GFDL}}
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{{Use American English|date=September 2020}}
{{Use American English|date=September 2020}}
{{Infobox software license
{{Infobox software license
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The '''GNU Free Documentation License''' ('''GNU FDL''' or simply '''GFDL''') is a [[copyleft]] [[license]] for free documentation, designed by the [[Free Software Foundation]] (FSF) for the [[GNU Project]]. It is similar to the [[GNU General Public License]], 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.
The '''GNU Free Documentation License''' ('''GNU FDL''' or simply '''GFDL''') is a [[copyleft]] [[license]] for free documentation, designed by the [[Free Software Foundation]] (FSF) for the [[GNU Project]]. It is similar to the [[GNU General Public License]], 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.


The GFDL was designed for [[User guide|manual]]s, 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 [[Wikipedia]] uses the GFDL<ref>{{Citation|title=Wikipedia:About|date=2018-07-26|url=https://en.wikipedia.org/w/index.php?title=Wikipedia:About&oldid=852074540#Trademarks_and_copyrights|work=Wikipedia|language=en|access-date=2018-09-07}}</ref> (coupled with the [[Creative Commons Attribution Share-Alike License]]) for much of its text, excluding text was imported from other sources after the 2009 licensing update that is only available under the Creative Commons license.<ref>{{Cite web|url=https://en.wikipedia.org/wiki/Wikipedia:Licensing_update|title=Wikipedia:Licensing update|date=2009-06-14|quote=With the transition, the Wikipedia 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 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.}}</ref>
The GFDL was designed for [[User guide|manual]]s, 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 [[Wikipedia]] uses the GFDL<ref>{{Citation|title=Bharatpedia:About|date=2018-07-26|url=https://en.wikipedia.org/w/index.php?title=Bharatpedia:About&oldid=852074540#Trademarks_and_copyrights|work=Wikipedia|language=en|access-date=2018-09-07}}</ref> (coupled with the [[Creative Commons Attribution Share-Alike License]]) for much of its text, excluding text was imported from other sources after the 2009 licensing update that is only available under the Creative Commons license.<ref>{{Cite web|url=https://en.wikipedia.org/wiki/Bharatpedia:Licensing_update|title=Bharatpedia:Licensing update|date=2009-06-14|quote=With the transition, the Wikipedia 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 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.}}</ref>


== History ==
== History ==
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== See also ==
== See also ==
{{Portal|Free and open-source software}}
 
<!-- Please keep entries in alphabetical order & add a short description [[WP:SEEALSO]] -->
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* [[BSD license]]
* [[BSD license]]
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* [https://www.gnu.org/philosophy/free-doc.html Free Software and Free Manuals], essay by Richard Stallman
* [https://www.gnu.org/philosophy/free-doc.html Free Software and Free Manuals], essay by Richard Stallman
* [https://opensource.apple.com/cdl/ Apple's Common Documentation License] {{Webarchive|url=https://web.archive.org/web/20090331154525/http://www.opensource.apple.com/cdl/ |date=2009-03-31 }}, an alternative license
* [https://opensource.apple.com/cdl/ Apple's Common Documentation License] {{Webarchive|url=https://web.archive.org/web/20090331154525/http://www.opensource.apple.com/cdl/ |date=2009-03-31 }}, an alternative license
{{GNU}}


{{DEFAULTSORT:Gnu Free Documentation License}}
{{DEFAULTSORT:Gnu Free Documentation License}}
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[[Category:Free and open-source software licenses]]
[[Category:Free and open-source software licenses]]
[[Category:Copyleft software licenses]]
[[Category:Copyleft software licenses]]
{{en-Wikipedia}}