https://app.kbone.net/vault/rfc/docid/9265
RFC8552: Scoped Interpretation of DNS Resource Records through "Underscored" Naming of Attribute Leaves
Internet Engineering Task Force (IETF) D. Crocker Request for Comments: 8552 Brandenburg InternetWorking BCP: 222 March 2019 Category: Best Current Practice ISSN: 2070-1721 Scoped Interpret...