This page is to coordinate efforts to reach out to other GFDL content providers that may wish to change their licensing in response to Wikimedia's relicensing decision. It is not an effort to convince others to switch – rather to ensure that sites which are currently compatible with Wikipedia understand the change taking place and what the August deadline means for them.
About dual/multi-licensing 
There is no requirement for non-Wikimedia projects to dual- or multi-license their content. Wikipedia and other Wikimedia projects are dual-licensing all original text by contributors. However, single-licensed CC-BY-SA text will be allowed to be imported into these wikis, and from that point on the article would become singly-licensed. GFDL-only text will not be allowed to be imported to any Wikimedia project.
To maximize your ability to share text with Wikimedia, you should either:
- choose CC-BY-SA as a single license, or
- choose CC-BY-SA as your main license, require imported text to be (at least) CC-BY-SA licensed, mark singly-licensed CC-BY-SA material as such, and not require any other license for import
External sites wishing to be GFDL-only will not be able to import content into Wikimedia projects. They may still export content from Wikimedia if they first verify that this text does not contain any singly-licensed CC-BY-SA material.
How to switch licenses 
How to transition from GFDL 1.3 to CC-BY-SA 3.0 
Appropedia is a good model. They switched to a single license in April, which is appropriate for most projects. See their License Migration page for their announcement.
- Announce the change
- Update the license details on your site
For MediaWiki sites, these are the settings you may need to change:
- In LocalSettings.php:
- $wgRightsIcon : http://i.creativecommons.org/l/by-sa/3.0/88x31.png (or a local copy of the image)
- $wgRightsUrl : http://creativecommons.org/licenses/by-sa/3.0/ (or a local copy of a page explaining the license)
- $wgRightsText : CC-BY-SA
- $wgRightsPage : does not necessarily need to change. It links to the page on your wiki where you explain your license policy
- On the wiki
- Project:Copyrights (or whatever is set by $wgRightsPage) and the page linked at MediaWiki:Copyrightpage (which may be the same) : Just add a note that wiki is Creative Commons Attribution Share-Alike
- MediaWiki:Copyrightwarning and MediaWiki:Copyrightwarning2 may need editing if they refer to the GFDL. You can use $2 in the first message and it'll pick up the correct license from the wgRightsText settings above.
- Some pages are no longer in use or not related to copyright but might still contain old references to the GFDL. Examples include MediaWiki:Copyrightpage, MediaWiki:Copyright, MediaWiki:Copyrightpagename, MediaWiki:Edittools, MediaWiki:Lastmodified, MediaWiki:Gnunote, and Template:Gnunote.
- You may want to update MediaWiki:Licenses which affects the file upload form.
Importing and exporting text from Wikimedia projects 
Before you export text to a Wikimedia project or import text from a Wikimedia project, you should check that the licensing on the external site is compatible. This table summarizes how Wikimedia content is expected to interact with other sites.
|License on External Site||Can export text to Wikimedia||Can import text from Wikimedia|
|Public domain||OK||Not OK|
|GFDL 1.0 only||Not OK||Not OK|
|GFDL 1.1 only|
|GFDL 1.2 only||Not OK||Before 2009-06-15: OK|
|After 2009-06-15: Possible if no CC-BY-SA-only content is included|
|GFDL only||Before 2008-11-01: OK||Before 2009-06-15: OK|
|After 2008-11-01: Not OK||After 2009-06-15: Possible if no CC-BY-SA-only content is included|
|CC-BY (any version)||OK||Not OK|
|CC-BY-SA-1.0||Not OK||Not OK|
|CC-BY-SA-2.0 / 2.5||Before 2009-06-15: Not OK||Not OK|
|After 2009-06-15: OK for creating derivative works|
|After 2009-06-15: Not OK for copying the entire work|
|CC-BY-SA-3.0||Before 2009-06-15: Not OK||Before 2009-06-15: Not OK|
|After 2009-06-15: OK||After 2009-06-15: OK|
|CC-BY-ND||Not OK||Not OK|
|GFDL-CC-BY dual||OK||Not OK|
|GFDL-CC-BY-SA-3.0 dual||OK||Before 2009-06-15: Not OK|
|After 2009-06-15: Possible if no CC-BY-SA-only content is included.|
- For dual licenses, the table assumes that the importer wants both licenses to apply. In general, imports are OK or Possible if the resulting work is labeled as having only one license apply to it. In that case, refer to the line for the corresponding license.
- Dates refer to the date that a particular revision was created on the Wikimedia site.
- This table does not apply to Wikinews where content is usually CC-BY.
- This table does not apply to Wikisource where content can have various licenses.
Contacting affected collaborative sites 
There are example form letters you can use to contact sites below. If you do contact a site, please indicate this in the appropriate table. If you use a different form letter for certain audiences, please link to the text here.
Wikis affected 
- See also: List of wikis
The following wikis are licensed under the GFDL and we should assume unless we hear otherwise that license compatibility with Wikipedia is important to them. While the FSF has developed and maintained the GFDL, the Wikimedia projects have essentially caused non-technical-documentation projects to use it; and we have some associated responsibility as the people most sensitive to wiki licensing issues to keep others whom we have affected in the loop. Please add to the lists below.
Style: please use the lic-outreach-header template and three column format to list contacts and licensing status. Make any long comments footnotes to simplify the tables. Include a question mark next to a contact name if you're not sure that is someone aware of the licensing discussions taking place.
Large wikis 
|Baseball reference||no discussion|
|Biblewiki||Main page talk?||the mysteries of the GFDL bible. RageSoss comment. |
|Biographicon||Herdrick (feedback form)||He says they are looking for someone to buy the site.|
|Enciclopedia Libre||Juanan Ruiz||Asked Mav if he could help. -Kaldari
:Not sure they will go for it due to poor reception of merge proposal. In fact, them just being FDL and us being both FDL and CCBYSA, would allow them to use our content but would prevent us from using theirs. Although we have already pretty much ported anything of real value and the Spanish Wikipedia is an order of magnitude larger and more active. I also don't have much free time at all. Somebody else would be a better choice. --Daniel Mayer (mav) 16:44, 24 July 2009 (UTC)
|Int'l Music Score Library||?||no discussion|
|Medpedia ||Judy Stone, web-email?||RageSoss email, SJ email  They are planning to switch to CC-by-sa, and are working out the legal details.|
|New World Encyclopedia ||Svemir Brkic||Kaldari email, switched to CC-BY-SA|
|PlanetMath ||Aaron Krowne||Kaldari email, they say they are going to migrate|
|sourcewatch, including congresspedia||Sheldon Rampton?||no discussion|
|StrategyWiki||?||Switched to CC-BY-SA 3.0|
|Wikia sites||Angela ||Most wikis will switch to CC-BY-SA on June 19th. See Wikia:Licensing|
|WikiDoc ||Alexandra Palmer?||Switched to CC-BY-SA 3.0 from 2009-07-30|
|Wikinfo||Fred Bauder||f-l discussion about how to switch|
|WikiZnanie.ru ||?||no discussion, BSD DPL from 2003-08-29 (see)|
|实用查询Wiki (ReferenceWiki, cn.18dao.net)||?||?|
Smaller wikis 
generally w/o their own wikipedia entry. here technical docs are separated in part b/c some of them deal directly with GFDL source material and should not be assumed to care about WP's switch
Ways to find other wikis 
The above is a fraction of a fraction of all GFDL wikis out there. Some search terms that can help you find hundreds more English wikis with little effort:
- "Content is available under GNU free documentation license" wiki -wikipedia
- 2,300,000 pages match. At an average of 1000 pages a wiki that's over 2000 wikis...
http://www.pantheraproject.net/wiki/index.php?title=Shareaza_Wiki:Copyrights http://www.cfd-online.com/Wiki/CFD-Wiki:Copyrights http://www.cgsecurity.org/wiki/TestDisk http://www.linuxtv.org/vdrwiki/index.php/VDR_Wiki:Copyright http://rt2x00.serialmonkey.com/wiki/index.php/Main_Page http://wiki.gnashdev.org/Main_Page
Important non-wiki content using GFDL 
This material may or may not eligible for relicensing, depending on how collaboratively it was created. The criteria laid out in GFDL 1.3 are : a massive multiperson collaboration site should have had the material publicly available (presumably for collaboration) prior to November 3, 2008.
- It looks like this project is strictly GFDL 1.2, although the license links point to the current (1.3) GFDL, which has the same url at gnu.org as the earlier versions. I'm leaving them a message at 'Talk:Main Page' informing them of the switch.--Ragesoss 22:16, 27 May 2009 (UTC)
- I sent an email through the contact interface explaining the situation.--Ragesoss 22:39, 27 May 2009 (UTC) I sent a form letter to a lead editor there. ~~~~
- discussion on Wikia