* Joel Aelwyn: > 4) The DFSG tradition is muddy (at best) on whether it refers to the > 4-clause or 3-clause variant of the license - It's pretty clear: The DFSG are older than the wide-spread adoption of the 3-clause BSD license. Until UC Berkeley relicensed the Berkeley Software Distribution under the 3-clause variant, our web pages reproduced the 4-clause variant. Other licenses also contain advertising clauses, and are still deemed DFSG-free.