Editing MIT License (section)

== Variations ==

=== X11 License ===
The '''X11 License''', also known as the '''MIT/X Consortium License''', is a variation on the MIT license, most known for its usage by the [[X Consortium]].<ref>{{citation |url=http://www.xfree86.org/4.0/LICENSE3.html#6 |section=3.3. X Consortium |title=3. X/MIT Licenses |publisher=The XFree86 Project |date=March 2004}}</ref> It has the identifier <code>X11</code> in the [[SPDX]] License List.<ref name="SPDX-X11">{{cite web|url=https://spdx.org/licenses/X11.html|title=X11 License|publisher=SPDX Working Group|website=spdx.org}}</ref><ref name="gnu-license-list-x11" />

It differs from the MIT License mainly by an additional clause restricting use of the copyright holders' name for advertisement.

It has the following terms:<ref>{{Cite web |title=X11 License Explained in Plain English - TLDRLegal |url=https://tldrlegal.com/license/x11-license |access-date=2021-03-26 |website=tldrlegal.com |archive-date=March 3, 2021 |archive-url=https://web.archive.org/web/20210303122101/https://tldrlegal.com/license/x11-license |url-status=dead }}</ref>

<pre>Copyright (C) <date> <copyright holders>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of <copyright holders> shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from <copyright holders>.</pre>

=== MIT No Attribution License ===
{{Infobox software licence
| name            = MIT No Attribution License
| image           = 
| caption         = 
| author          = Roman Mamedov, [[Amazon Web Services]]
| version         = 
| publisher       = 
| date            = 28 March 2018
| spdx            = MIT-0
| OSI approved    = Yes<ref name="osi_approval_mit-0">{{cite web |url=https://lists.opensource.org/pipermail/license-review_lists.opensource.org/2020-August/004915.html |title=[License-review] Request for Legacy Approval of MIT No Attribution License |date=5 August 2020 |first=Pamela |last=Chestek}}</ref>
| Debian approved = n/a
| FSF approved    = n/a
| GPL compatible  = Yes
| copyleft        = No
| linking         = Yes
| website         = https://github.com/aws/mit-0
| deprecated      = 
}}
The MIT No Attribution License, a variation of the MIT License, has the identifier <code>MIT-0</code> in the [[SPDX]] License List.<ref name="SPDX-MIT0">{{cite web|url=https://spdx.org/licenses/MIT-0.html|title=MIT No Attribution|publisher=SPDX Working Group|website=spdx.org}}</ref> A request for legacy approval to the [[Open Source Initiative]] was filed on May 15, 2020,<ref>{{cite web|url=https://lists.opensource.org/pipermail/license-review_lists.opensource.org/2020-May/004856.html | title=[License-review] Request for Legacy Approval of MIT No Attribution License |date=15 May 2020| first=Tobie |last=Langel }}</ref> which led to a formal approval on August 5, 2020.<ref name="osi_approval_mit-0"/> By doing so, it forms a [[public-domain-equivalent license]], the same way as [[BSD licenses#0-clause|BSD Zero Clause]].{{citation needed|date=September 2021}} It has the following terms:
<pre>
MIT No Attribution

Copyright <YEAR> <COPYRIGHT HOLDER>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</pre>

=== Other variations ===
The [[SPDX]] License List contains extra MIT license variations. Examples include:<ref name="SPDX License List">{{cite web|title=SPDX License List|url=https://spdx.org/licenses/|publisher=SPDX Working Group|website=spdx.org}}</ref>
* {{code|MIT-advertising}}, a variation with an additional advertising clause.
There is also the Anti-Capitalist Software License (ACSL),<ref>{{Cite web |title=The Anti-Capitalist Software License |url=https://anticapitalist.software/ |access-date=2024-05-08 |website=anticapitalist.software}}</ref> built off of the MIT license. The ACSL is not OSI-approved, nor does it qualify as a free software license as defined by the FSF, since it limits the permissions granted to individuals and organizations that do not operate under capitalist structures, like non-profits and cooperatives.