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There should be some sort of unified modeling language for this sort of task...

Hi jrockway,

Can you please elaborate more on this point.

It's a joke -- do a web search for "unified modeling language".

Alright, let's be Rational about this.

[FMC]( http://fmc-modeling.org/ ) is much closer to the notation and level of abstraction you used in your diagram than UML.