Well yes, but that doesn't solve the parsing problem right? My point is that some YAML or JSON documents conform to a specification which can be codified as a

Well yes, but that doesn't solve the parsing problem right? My point is that some YAML or JSON documents conform to a specification which can be codified as a set of rules, which combined with the data form facts. I'm asking if there are existing systems to parse these files given I write these rules in a particular syntax, spitting out a queryable representation of the data.