Yes, the GNU FDL was what Wikipedia was (and mostly is) licenced under.
They've shifted to a Creative Commons licence that achieves much the same thing because the GNU FDL has some awkward requirements from it's history as a software documentation licence from the pre-web era.
They've shifted to a Creative Commons licence that achieves much the same thing because the GNU FDL has some awkward requirements from it's history as a software documentation licence from the pre-web era.