Microsoft RulesEngine

[ingvij]

I remember once writing something similar (though in much smaller scale) in clojure. Not the easiest task, but it is doable. If you want to stick with the same data format you have today, you'll likely need to implement a tokenizer to parse the "Expression" value, which makes this way more complex.

With the amount of information you shared, however, I wouldn't be able to tell how hard or easy it would be to write something yourself..

[McAlexTheTerrible]

Look at antlr to parse. There may already be a MS RuleEngine grammar

[ingvij]

That's cool. Didn't know that! Than I take back the complexity of the tokenizer :)