By far the best work on this subject has been written by Lawrence Rosen in his book "Open Source Licensing": http://www.rosenlaw.com/oslbook.htm http://www.ros

By far the best work on this subject has been written by Lawrence Rosen in his book "Open Source Licensing": http://www.rosenlaw.com/oslbook.htm http://www.rosenlaw.com/oslbook.htm Free to read online - or buy a hardcopy. Unlike less useful works, Rosen actually provides a model for thinking about open source models. Even if you only care about commercial software licensing, this this information in this book will be valuable.