Wikipedia's content used to be licensed under GFDL 1.2 or any later version. In order to transition to a more appropriate license the Wikimedia Foundation asked the FSF to release a new version (GFDL 1.3) that specifically allowed relicensing to CC BY-SA.
The new license may be "similar in sprit" but what it allows relicensing to may not be.
Comments
Wikipedia's content used to be licensed under GFDL 1.2 or any later version. In order to transition to a more appropriate license the Wikimedia Foundation asked the FSF to release a new version (GFDL 1.3) that specifically allowed relicensing to CC BY-SA.
The new license may be "similar in sprit" but what it allows relicensing to may not be.
'relicensing' is also still under the original license as far as I understand it. Isn't it still bound by the clause not to make drastic changes?