http://www.rfc-editor.org/rfc/rfc7720.txt
RFC 7720: DNS Root Name Service Protocol and Deployment Requirements, M. Blanchet, L-J. Liman2015-12-01T23:00:00-00:00The DNS root name service is a critical part of the Internet architecture. The protocol and deployment requirements for the DNS root name service are defined in this document. Operational requirements are out of scope.