http://www.rfc-editor.org/rfc/rfc5011.txt
RFC 5011: Automated Updates of DNS Security (DNSSEC) Trust Anchors, M. StJohns2007-09-01T23:00:00-00:00This mechanism will require changes to resolver management behavior (but not resolver resolution behavior), and the addition of a single flag bit to the DNSKEY record. [STANDARDS-TRACK]