October 20, 2021
The English version of this page can be translated into English. The license used by Wikipedia to provide its content for free is the same as the license for free computer programs. This principle is called copyleft. In other words, Wikipedia content may be copied, modified, and distributed as long as such new versions grant the same rights to others and identify the authors of the Wikipedia article used. (A direct link to the article satisfies our author identification requirement.) Wikipedia articles will remain free indefinitely and can be used by anyone under certain restrictions, usually to them to keep such right. To achieve these purposes, the text contained in Wikipedia is licensed to the public under the GNU Free Documentation License (GFDL). The full text of this license can be found at Wikipedia: GNU Free Documentation License Text. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License Text". The content of Wikipedia has more accompanying definitions.The only English version of the GFDL is the legal document. The electronic data that comprises the English Wikipedia is available on the servers of the Wikimedia Foundation in Florida, United States. So the law that Wikipedia follows, including that of the English Wikipedia, is the laws of the United States. The following is our interpretation of the GFDL, and the rights and responsibilities of users and contributors. IMPORTANT: If you want to use content on this Wikipedia, please read the Rights and responsibilities of users section first. Then follow the GNU Free Documentation License. Rights and responsibilities of usersIf you want to use Wikipedia content for your books/articles/websites, etc., you can do so, but you must comply with the GFDL. If all you are doing is duplicating Wikipedia articles, you should follow the second part of the GFDL, as mentioned in Wikipedia: Verbal copying. If you create derivative versions by filling in or modifying content, it must comply with the following: your materials must also be licensed under the GFDL, you must identify the authors of that article (section 4B), and must provide access to a “transparent” copy of such material (section 4J). (A "transparent" copy of a Wikipedia article is in any format from us, such as wiki text, html page, xml feed, etc.) You can partially fulfill the latter two functions by placing a explicit link back to the Wikipedia article posted on this site. You also need to grant access to a transparent copy of the new text. But keep in mind that the Wikimedia Foundation does not guarantee that it will retain information about the author and the transparent copy of the article. We therefore encourage you to provide information about the author as well as transparent copy of your published works.