JsonLogic
And the circle of life continues!  I have seen exactly this method in 2004-2006 but with XML.If you are reading this, and you think it is a good idea, please don't follow it as it is not.Back in 2006-2009 I worked at MobiTV, which we had the same exact way/method of programing our mobile apps, on J2ME/feature phones. The made up language was called CEF which was based on XML. While the idea is sound in paper, This turns really fast into an ugly, debug everywhere type of scenario, where it is hard to both develop and debug properly.The only way this is ok, is when you have some fully automated UI tool, that stores some kind of state, and retrieves it back, but with no human intervention and some very very limited logic.  Otherwise you are in a world of pain.  If you try to include real application logic into something like this it is going to hurt your business long term.It will turn your business logic like some Maven configuration, full of gotchas and more.