https://datatracker.ietf.org/doc/draft-leiba-urnbis-ietf-namespace/00/
draft-leiba-urnbis-ietf-namespace-00 - Registration of Second-Level URI Namespaces Under "ietf"
RFC 2648 defines the "ietf" URN namespace, and defines a number of sub-namespaces. RFC 3553 defines an additional sub-namespace, "params", and creates a...