[anon1253]

Yep. I agree. Although maybe XML schema (https://www.w3.org/XML/Schema) -> JSON Schema. And then there's also XQuery, DTDs, namespaces, entities,… which are also in need of reinventing I guess.

[nikolay]

JMESPath [0], started by Amazon and used by Microsoft in Azure, is something that tries to accomplish some of the XQuery goals in a simpler way.

[0]: http://jmespath.org/