internet terms-of-service creative-commons
Host a public wiki website: how to make every contributors&#39; content to be licensed under CC-SA automatically?
<p>I'm trying to host a wiki website which is similar to Wikipedia: all contents licensed under Creative Commons Attribution-ShareAlike License. Besides putting a footnote at each page to explicitly declare the license, what and where should I put the legal language to inform that every contributor must contribute under this same license (and if they do contribute, they automatically agree with it)?</p>

<p>At the bottom of every edit screen on Wikipedia, above the "save page" button, it says:</p>

<blockquote>
  <p>By clicking the "Save page" button, you agree to the <a href="https://wikimediafoundation.org/wiki/Terms_of_Use" rel="nofollow">Terms of Use</a> and you irrevocably agree to release your contribution under the <a href="https://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_License" rel="nofollow">CC BY-SA 3.0 License</a> and the <a href="https://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License" rel="nofollow">GFDL</a> with the understanding that a hyperlink or URL is sufficient for CC BY-SA 3.0 attribution.</p>
</blockquote>

<p>If you are asking for technical details on how to show that on a MediaWiki installation, that question could probably be better asked at another site. Regardless, on a standard MediaWiki installation, that text may be found and modified at the [[MediaWiki:Copyrightwarning2]] (sometimes [[MediaWiki:Copyrightwarning]]) page of the wiki. </p>
