2009/1/11 geni geniice@gmail.com:
The critical term is "reasonable to the medium or means" for mediawiki our current method of crediting is probably reasonable to the medium or means. For other applications different forms of crediting are required. Any 5 author stuff is completely irrelevant.
I never said that CC-BY-SA makes reference to principal authors in a similar fashion as the GFDL does. Of course it does not. However, it allows attribution by name and/or by URI, and also states that "The credit required by this Section 4(c) may be implemented in any reasonable manner". If, by terms of service of Wikipedia, we ask contributors to give permission to be attributed by URL under certain circumstances, this is consistent with the language of CC-BY-SA, and is consistent with the attribution requirements of GFDL.