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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)
+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