https://github.com/18f/api-standards
https://github.com/GSA/api-standards
https://github.com/WhiteHouse/api-standards
http://docs.smarthealthit.org/
Domain Hierarchy Access Regulation for Microservice Architecture CA-Technologies-OReilly-Securing-Microservice-APIs.pdf
https://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm