2009/7/22 魏藥/Medical-Wei <medicalwei@gmail.com>
Hi all,
Recently, I received some messages about converting the wiki license
to CC-By-SA 3.0. However, are there any reason that we must do this?

Most wikis now use CC-BY-SA, including most of the Linux wikis I've looked at. CC-BY-SA is the more standard license for written content. I think it's a good idea to change - but actually the Wikimedia dual-license model is even better:

The dual-licensing option used by Wikimedia is probably the best option for a Linux wiki, where there is still some interest in GFDL. It's a little complex to explain - see http://en.wikipedia.org/wiki/Wikipedia:Licensing_update

In Wikimedia's case, this means that the end-user can choose either license, *except* where someone has added CC-BY-SA-only content to a page, which makes that page single licensed. It is the end-user's responsibility to check.

In theory GFDL could be chosen instead, so GFDL content could be added, but CC-BY-SA content could not be. As I've said, though, CC-BY-SA is the more common license, so I'd suggest this as the default.

So, my suggestion is to use the same variation of a dual-license as Wikimedia.


In case anyone is wondering, the operator of the wiki can make the decision to change license, until the end-of-July deadline. See http://www.gnu.org/copyleft/fdl.html#section11 for this and any other details.

If there's any uncertainty about this, with the deadline coming up for the license transition (end of July), then there is a solution to give more time: switch to a simple dual license. This means all content is licensed under both GFDL and the CC-BY-SA licenses - but we can't add material from other sources (if it's only under one of the licenses). Then when a decision has been made to go with a particular option, it can be switched.

Let me know if anything is unclear.


About DFSG, documents licensed with GFDL without invariant sections
are DFSG-free.
http://wiki.debian.org/DFSGLicenses#GNUFreeDocumentationLicense.28GFDL.29

Thanks,
--
Medical-Wei/魏藥
p.s. Chris, We've met in Ecole Cafe :D

I remember you - playing the African drum :-)



--
Chris Watkins

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