Thank you, that is very helpful! You put a good amount of effort into that. And yes, I agree, you have to know exactly what they say--but I fear becoming confu

Thank you, that is very helpful! You put a good amount of effort into that. And yes, I agree, you have to know exactly what they say--but I fear becoming confused and forgetting which license allows exactly what after trudging through the legal constructions and lists of verbs such as "use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies" (well that's not so bad now). Now this is a heavy, full-contract-like license: http://www.gnu.org/licenses/gpl.html http://www.gnu.org/licenses/gpl.html Thankfully, that sounds to be the exception among licenses.