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2026

Archived version 1 of 2. This is how the model read before it was corrected. It is shown read only. The current version is here.

Functional Source License, Version 1.1, MIT Future License

Also known as FSL 1.1, FSL-1.1-MIT, Functional Source License 1.1.

Commercial use
allowed
Share alike
required
Attribution
required (keep the copyright and license notices)
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Canonical URI https://dalicc.net/licenselibrary/FSL-1.1-MIT

Permissions

  • Commercial use from the text Using the work to generate income, directly or indirectly, for example by selling it or by using it in advertising.
  • Derivative works from the text Distributing an adaptation of the work and making it available to the public.
  • Derive from the text Creating a new work from the work, such as a translation, adaptation or arrangement of it or of a part of it.

    Duties

    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Share alike from the text Adaptations have to be licensed under the same license or one the license names as compatible.
  • Display from the text Showing the work to the public without making a copy the viewer keeps.
  • Distribute from the text Providing copies of the work to the public or to anyone else.

    Duties

    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Share alike from the text Adaptations have to be licensed under the same license or one the license names as compatible.
  • Modified works from the text Distributing a modified version of the work that does not amount to a new, derivative work.
  • Modify from the text Altering the work, for example by updating it, without creating a new work; an alteration that creates a new work is Derive.

    Duties

    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Share alike from the text Adaptations have to be licensed under the same license or one the license names as compatible.
  • Patent grant from the text Granting a license under the patent claims that a contributor holds and that the contribution necessarily infringes.
  • Present from the text Performing the work in public, including by broadcast or other communication to the public.
  • Reproduce from the text Making copies of the work in any form.

Prohibitions

  • Change license from the text Not permitted: Change license. Replacing the license of the work, or of an adaptation, with another license, or changing its terms.
  • Promote from the text Not permitted: Promote. Using the name or trademarks of the licensor or of contributors to endorse or promote a product.

License-wide duties

This license states no duties that apply to the work as a whole.

Further terms

These are the things the license says about itself beyond the acts it permits, forbids and requires: when it ends, how long there is to put a breach right, which law governs it, and so on. A term that comes from the DALICC vocabulary links to its definition.

Patent license ends if you sue
Yes. Not a ban on suing: a patent claim over the work ends the patent license, or the whole license, as the text provides.
Field of use restriction
any Permitted Purpose, which is any purpose other than a Competing Use
Reciprocity scope
all copies, modifications and derivatives of the Software

Clauses

Warranty disclaimer

THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, TITLE OR NON-INFRINGEMENT.

Limitation of liability

IN NO EVENT WILL WE HAVE ANY LIABILITY TO YOU ARISING OUT OF OR RELATED TO THE SOFTWARE, INCLUDING INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF WE HAVE BEEN INFORMED OF THEIR POSSIBILITY IN ADVANCE.

Additional clauses

The "Software" is each version of the software that we make available under these Terms and Conditions, as indicated by our inclusion of these Terms and Conditions with the Software.

Info

Target asset types
Software
Region / jurisdiction
Worldwide
Validity
Perpetual
Source
https://spdx.org/licenses/FSL-1.1-MIT.html
Legal code
https://fsl.software/FSL-1.1-MIT.template.md
This description is published under
https://dalicc.net/licenselibrary/CC-BY-4.0
SPDX identifier
FSL-1.1-MIT on the SPDX license list
Version
1.1
DALICC identifier
FSL-1.1-MIT

This record is published under CC BY 4.0. Credit it as: DALICC License Library, DALICC - Verein zur Förderung der Rechtssicherheit in der Datenbewirtschaftung, https://dalicc.net, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The license it describes belongs to its publisher.

History

This license model has 2 versions. Version 2 is the one served today; every earlier version keeps its own address, so a conclusion drawn from one of them can still be checked against it.

  1. Version 2 current2026-09-24 Giray Havur

    The changes since version 1 recorded which sentence of the text each statement rests on and named the license the record itself is published under.

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    5 changes

    • changed permission odrl:derive with duties [cc:Notice, cc:ShareAlike]

      was permission odrl:derive with duties [cc:Notice, cc:ShareAlike]

      Manual edit Its duty cc:Notice quotes "If you redistribute any copies, modifications or derivatives of the Software, you must include a copy of or a link to these Terms and Conditions and not remove any copyright notices provided in or with the Software." Its duty cc:ShareAlike quotes "The Terms and Conditions apply to all copies, modifications and derivatives of the Software."

    • changed permission odrl:distribute with duties [cc:Notice, cc:ShareAlike]

      was permission odrl:distribute with duties [cc:Notice, cc:ShareAlike]

      Manual edit Its duty cc:Notice quotes "If you redistribute any copies, modifications or derivatives of the Software, you must include a copy of or a link to these Terms and Conditions and not remove any copyright notices provided in or with the Software." Its duty cc:ShareAlike quotes "The Terms and Conditions apply to all copies, modifications and derivatives of the Software."

    • changed permission odrl:modify with duties [cc:Notice, cc:ShareAlike]

      was permission odrl:modify with duties [cc:Notice, cc:ShareAlike]

      Manual edit Its duty cc:Notice quotes "If you redistribute any copies, modifications or derivatives of the Software, you must include a copy of or a link to these Terms and Conditions and not remove any copyright notices provided in or with the Software." Its duty cc:ShareAlike quotes "The Terms and Conditions apply to all copies, modifications and derivatives of the Software."

    • changed prohibition dalicc:promote

      was prohibition dalicc:promote

      Manual edit The statement now quotes the sentence of the licence text it rests on: "Except for displaying the License Details and identifying us as the origin of the Software, you have no right under these Terms and Conditions to use our trademarks, trade names, service marks or product names."

    • added dct:license <https://creativecommons.org/licenses/by/4.0/>

      Manual edit Every record is published under CC BY 4.0. cc:license names the record DALICC keeps of that licence; dct:license now names it by the address Creative Commons publishes it at, so that a consumer matching the canonical IRI finds it.

  2. Version 1

    Created from the license text on 2026-09-22 (Source-available licences and riders).

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Every change names the reason behind it: a finding of the content review, one of its library-wide decisions, the metadata that review wrote onto every record, or a hand edit. None of it is legal advice.

Nothing on this page is legal advice. What a license means is decided by its text; ask a legal advisor before you rely on it.