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Status:

EXPERIMENTAL

Authors:

R. Barnes
S. Kent
E. Rescorla

Stream:

INDEPENDENT

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DOI:  https://doi.org/10.17487/RFC6919

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Abstract

RFC 2119 defines a standard set of key words for describingrequirements of a specification. Many IETF documents have found thatthese words cannot accurately capture the nuanced requirements oftheir specification. This document defines additional key words thatcan be used to address alternative requirements scenarios. Authorswho follow these guidelines should incorporate this phrase near thebeginning of their document:

The key words "MUST (BUT WE KNOW YOU WON\'T)", "SHOULD CONSIDER","REALLY SHOULD NOT", "OUGHT TO", "WOULD PROBABLY", "MAY WISH TO","COULD", "POSSIBLE", and "MIGHT" in this document are to beinterpreted as described in RFC 6919.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.