https://goessner.net/articles/JsonPath/
https://en.wikipedia.org/wiki/JSONPath
https://ietf-wg-jsonpath.github.io/draft-ietf-jsonpath-base/draft-ietf-jsonpath-base.html

baeldung
https://www.baeldung.com/guide-to-jayway-jsonpath
2019
https://testerslittlehelper.wordpress.com/2020/08/18/more_json_path/
https://testerslittlehelper.wordpress.com/2019/01/20/jsonpath-in-rest-assured/

tools
https://jsonpathfinder.com/
https://www.site24x7.com/tools/jsonpath-finder-validator.html