Yes: oops. Linear programming as constraint solving. Thanks! I have not actually done any ladder logic; it seemed to be like flow charts or network transaction

Yes: oops. Linear programming as constraint solving. Thanks! I have not actually done any ladder logic; it seemed to be like flow charts or network transaction diagrams... I should not post so much when tired. But your great comments got me thinking about all of the ways that we approach programming in non-lexical ways, be that with a graphical formal analysis like Yourdon/Coad or (shudder) Rational Rose, or more direct translation like (ouch) UML, or just wireframes and story boards when hashing things out with a client. Perhaps all of that is wildly off-topic; they all distill down into written code, usually in one of the "7 ur-languages".