https://www.rfc-editor.org/rfc/rfc4969.html
RFC 4969: IANA Registration for vCard Enumservice
rfcianaregistrationvcard
https://datatracker.ietf.org/doc/draft-lendl-enum-sip-lr/
draft-lendl-enum-sip-lr-00 - IANA Registration for the enumservice-subtype 'sip:lr'
This document requests IANA registration of an enumservice-subtype for loose route variant for SIP, the Session Initiation Protocol. This subtype allows for...