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   Re: [xml-dev] Evolving Information by XML Element Mutations

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>>We see the Vineyard System has mutated to include a new element, <fjkele>, which has new data, 30fkopcd0.  What kind of mutation would be required so that Pickers can start using this new element and data?  Does the stylesheet need to undergo a mutation?  This seems very complicated (especially trying to mutate a stylesheet).  There must be a simpler way to introduce mutations.  What are your thoughts?<<
Well, if you wanted to emulate the E Coli system, you need a couple of things: (1) a picker that starts producing something into the environment. (2) a picker that suddenly requires that something (3) the ability for the environment to hold that something.
Perhaps a simple way to do this would be to come up with a random list of "somethings"-- in the case of the E Coli it was a chemical. So if you had a random list of chemicals, and each round had the chance of a mutation (either consumed or produced) then you could potentially find a match. This is very simplistic though. Not real. But it may eventually bear an interesting parallel to the business world which is full of producers and consumers that form interesting relationships. Right now you have one of these relationships:
Vineyard produces grapes
Picker consumes grapes.
Right now, all of the logic in the stylesheet is directed around this one single relationship of grapes. However it could be geared around a more generalized list of production and consumption that can ultimately be "mutated" each generation. Then the logic of the stylesheet would be geared around the relationships rather than grapes. Of course to make it interesting mutations should affect metabolism... if a picker grows a third arm then it will cost him more grapes. This would give a start for one avenue of mutation-- then again I am not sure what people would produce that others would need to consume...
Out of curiosity what is the goal here? As Rick said there is already quite a bit of genetic programming out there, though this is a fun example and though it is iterative it isn't strictly generational as there is no reproduction of the mutations-- but when do we get to see the pretty output?
Jeff Rafter


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