@Jo, My philosophy is as much automation as possible. Now just for the sake of argument consider this. We have 2 Math Spec languages A and B. Since both are means to the same end, they differ only in subtle places. While that might not be the case always, let us assume that it is so. By using python code as the spec file, we are forcing the user to unnecessarily iterate over the rules that are same for both the languages. So this is what I propose, we keep a spec sheet in between which captures only the differing rules. The rest of them will be assumed to be the same being specified once and open to inspection. That way we can build on existing rules and not waste programming effort as well as time on reinventing the wheel as you put it. This resembles the functional overriding concept from OOP. I hope this addresses your concerns.
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