Historical Permission Notice and Disclaimer

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Historical Permission Notice and Disclaimer
Author Bruce Dodson[1]
Latest version n/a
Publisher Dr. Bruce Dodson
Published 29 November 2002
FSF approved Yes[citation needed]
OSI approved Yes
GPL compatible Yes[citation needed]
Copyleft No
Linking from code with a different license Yes
Website http://opensource.org/licenses/HPND
Deprecated Yes[2]

The Historical Permission Notice and Disclaimer is an open source license, approved by the Open Source Initiative (OSI). It is unique among the OSI's licenses because of the choices it allows in its construction; it lets the licensor pick anywhere from 0-2 warranty disclaimers, whether they want to prohibit the author's name from being used in publicity or advertising surrounding a distribution (like in the BSD License), and other spelling and grammar options. Besides this, the license can be almost functionally identical to the new 3-clause BSD License (if the option for the no-promotion clause is exercised), or the MIT License (if the option for the no-promotion clause is not exercised).

Variants of this license are in use primarily in older software, including the original BSD kernel. Today, it is most popular to choose either the new 3-clause BSD License or the MIT License to meet the licensing needs of the developer.

This is the only OSI-certified license (excluding the public domain) that can lack a disclaimer of warranty. The Free Software Foundation has not yet recognized this license as a free software license in the general case, but has done so for certain variations, such as that used for versions of Python before 1.6b.[3][4]


  1. ^ Dodson, Bruce (29 November 2002). "discuss: approval request: "Historical Permission Notice and Disclaimer"". license-discuss mailing list. http://crynwr.com/cgi-bin/ezmlm-cgi?3:mss:6305:jggiiehpeekebdbmpopm.
  2. ^ Dodson, Bruce (29 November 2002). "Historical Permission Notice and Disclaimer (HPND)". Open Source Initiative. Retrieved 24 January 2014. 
  3. ^ Stallman, Richard (7 March 2008). "GPL-Compatible Free Software Licenses". Free Software Foundation. Retrieved 16 March 2008. 
  4. ^ "Python 2.5 license". Python.org. Retrieved 16 March 2008. 

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