SCRATCH.md

https://github.com/antlr/grammars-v4/tree/master/java/java

https://github.com/antlr/grammars-v4/blob/master/clojure/Clojure.g4

https://www.json.org/json-en.html

https://cswr.github.io/JsonSchema/spec/grammar/

https://github.com/gregsh/Clojure-Kit/blob/master/grammars/clojure.bnf

https://iamwilhelm.github.io/bnf-examples/

https://kotlinlang.org/docs/reference/grammar.html