Licensing talk:Main

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WTFPL license should link upstream

http://sam.zoy.org/wtfpl/ -- there's no need for us to carry this on the wiki AFAICT. --stickster 22:32, 5 August 2009 (UTC)

Condensed GPL Compatibility Matrix

I found the GPL compatibility matrix hard to assimilate because of its width, largely the fault of the use of "only", "or later", and "OK if you convert to" text. I prepared a condensed version that uses the licenses' short names and states the resulting license in each cell without explanatory text. I also removed the footnotes since they add no essential information. Here it is:

		Destination
Source	Mode of use	GPLv2	GPLv2+	GPLv3+	LGPLv2	LGPLv2+	LGPLv3+
GPLv2	copy or link	(GPLv2)	GPLv2	NO	GPLv2	GPLv2	NO
GPLv2+	copy or link	(GPLv2)	(GPLv2+)	(GPLv3+)	GPLv2+	GPLv2+	GPLv3+
GPLv3+	copy or link	NO	GPLv3+	(GPLv3+)	GPLv3+	GPLv3+	GPLv3+
LGPLv2	copy	(GPLv2)	(GPLv2+)	(GPLv3+)	(LGPLv2)	LGPLv2	GPLv3+
LGPLv2+	copy	(GPLv2)	(GPLv2+)	(GPLv3+)	(LGPLv2)	(LGPLv2+)	(LGPLv3+)
LGPLv3+	copy	NO	GPLv3+	(GPLv3+)	GPLv3+	LGPLv3+	(LGPLv3+)
LGPLv2	link	(GPLv2)	(GPLv2+)	(GPLv3+)	(LGPLv2)	(LGPLv2+)	(LGPLv3+)
LGPLv2+	link	(GPLv2)	(GPLv2+)	(GPLv3+)	(LGPLv2)	(LGPLv2+)	(LGPLv3+)
LGPLv3+	link	NO	GPLv3+	(GPLv3+)	(LGPLv2)	(LGPLv2+)	(LGPLv3+)

Notes:

• I'm conflating Lesser GPL 2.1 and Library GPL 2.0 as in the Good Licenses list.
• I realized the FSF's original table does not have "or later" in the row labels. I have asked FSF for clarification.
• According to the original footnotes, LGPLv2 converts to GPLv2+ and LGPLv3 converts to GPLv3, in addition to the obvious conversion of a superset of versions to a subset. I assume the idea is that later LGPL versions will continue to convert to the corresponding GPL versions so that LGPLv3+ converts to GPLv3+; I have asked FSF to confirm this.
• I am considering adding rows and columns for GPLv3 and LGPLv3 because a few Fedora packages use those licenses.

Once the issues are resolved, I would like to propose this table for adoption on the licensing page.

Mattmccutchen 02:43, 29 October 2009 (UTC); updated 19:47, 31 January 2011 (UTC)

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+1 for this condensed table. It's very nice looking. :)

--Dafrito 17:49, 26 June 2010 (UTC)

Deadlinks

ELC-2.0

Please replace http://www.osedu.org/licenses/ECL-2.0/ with http://opensource.org/licenses/ECL-2.0 for ECL 2.0

QPL

Please replace the link to QPL with https://doc.qt.io/archives/3.3/license.html

-- Rineau (talk) 07:13, 24 May 2019 (UTC)