Hi Folks,
I just noticed that the latest version of Oxygen (version 20.1) supports JSON Schema. And it can validate a JSON instance against a JSON Schema.
https://www.oxygenxml.com/forum/topic14254.html#p47927
I also just discovered an XQuery library module that transforms an XML Schema to a JSON Schema equivalent:
https://gist.github.com/lcahlander/ 0eecf499dfe307d7aecbb15f775bd4 f2