Eric showed up to advertise his stochastic grammer techonology. http://computableplant.ics.uci.edu/papers/StochProcSemanticsTR.pdf
It appears to be a production rule -> result with a probablity Of course the various components can be mutualy dependent on various state parameters.
The question is can this be used for biological network evolution?
E.g. simplified cell cycle?
Also Eric's papers are linked from http://www.ics.uci.edu/~emj/