RFC 6919: Further Key Words for Use in RFCs to Indicate Requirement LevelsIndependent Submission R. Barnes Request for Comments: 6919 S. Kent Category: Experimental BBN ISSN: 2070-1721 E. Rescorla RTFM, Inc. 1 April 2013 Further Key Words for Use in RFCs to Indicate Requirement Levels Abstract RFC 2119 defines a standard set of key words for describing requirements of a specification. Many IETF documents have found that these words cannot accurately capture the nuanced
