On Mon, Dec 14, 2009 at 11:45 AM, Peter Childs <pchilds at bcs.org> wrote: > CCbySA says you must attribute where it came from, ODbl make no such > demand. ODbL does make such a demand, see: http://www.opendatacommons.org/licenses/odbl/summary/ http://www.opendatacommons.org/licenses/odbl/1.0/ (sections 4.2 and 4.3) cheers, matt