Cited in: RFC 9366

4 RFCs mentioned in the text of RFC 9366 (Multiple SIP Reason Header Field Values)

RFC	Title	Status	Date
2119	Key words for use in RFCs to Indicate Requirement LevelsS. Bradner	Best Current Practice	March 1997
3326	The Reason Header Field for the Session Initiation Protocol (SIP)H. Schulzrinne, D. Oran, G. Camarillo	Proposed Standard	December 2002
7841	RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed.	Informational	May 2016
8174	Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba	Best Current Practice	May 2017