Eiffel Forum License

The Eiffel Forum License (EFL) is a free software license written by NICE, the Non-Profit International Consortium for Eiffel. Version 2 of the license, the latest as of 2008, is the first version to be GPL compatible.[1] EFLv2 has been approved by the OSI,[2] and is approved as a free software license by the FSF.[1]

Eiffel Forum License
AuthorNICE
Latest version2
PublisherNICE
Published2002
SPDX identifierEFL-1.0, EFL-2.0
Debian FSG compatibleYes
FSF approvedYes
OSI approvedYes
GPL compatibleYes
CopyleftNo
Linking from code with a different licenceYes

The Eiffel Forum License is one of the shortest licenses that is OSI approved.[3]

License text

 
 Eiffel Forum License, version 2
 
 1. Permission is hereby granted to use, copy, modify and/or
    distribute this package, provided that:
       * copyright notices are retained unchanged,
       * any distribution of this package, whether modified or not,
         includes this license text.
 2. Permission is hereby also granted to distribute binary programs
    which depend on this package. If the binary program depends on a
    modified version of this package, you are encouraged to publicly
    release the modified version of this package.
 
 THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT WARRANTY. ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE TO ANY PARTY FOR ANY
 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS PACKAGE.

Example application

Since this is a published licence it may be referenced from a work using the following simple statement:[4]

Copyright 2008, Author Name, example.org
Licensed under the Eiffel Forum License 2.

References
  1. "Free Software Foundation - Licenses". Retrieved 2007-12-31. This is a free software license, compatible with the GNU GPL.
  2. "Licenses by Name". Retrieved 2007-12-31. The following licenses have been approved by the OSI via the License Review Process […] Eiffel Forum License V2.0
  3. "Why the Eiffel Forum License?". Retrieved 2016-08-24. Why the Eiffel Forum License is awesome.
  4. Lawrence E. Rosen. "RE: Re: ?sthetic Permissive License - For Approval". Retrieved 2007-12-31. The McQuary limit has long ago been satisfied by the simple copyright and licensing notice: Copyright (C) <year> <author or owner> Licensed to the public under the XXXX license. ...where XXXX is the name of an OSI-approved or CC-approved license published on OSI's or CC's website.
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