The Open Knowledge Foundation are bringing the Open Service Definition to version 1.0 which is a helpful step. I wholeheartedly agree with it. As services and APIs develop, we need to create a legal framework within which data, knowledge and dissemination services can be used to allow greater access to open knowledge now rather than when silos have been built.
However I believe that it needs an addition to the first clause: freedom of data access.
Any methodology by which data has been transformed or is generated should be clearly explained so that, if necessary, results can be replicated. The transparency of this would allow commercial and educational users a greater confidence in the data presented.
Perhaps it is more along the lines of Open Knowledge Definition but I think it is an important point to make clear rather than leaving it implicit.