Be careful with terminology: the thing defined in SQL:2016 is called the SQL/JSON path language, and although it’s similar to the older JSONPath, it’s not the same.
PostgreSQL also calls the SQL/JSON path language “JSON Path”, and the data type is called `JSONPATH`.
Thanks for the clarification! I guess it would make a lot of sense for a tool such as jtc to use SQL/JSON path language then. I'm sure it'll be the most common JSON query language soon.