BCP 14

RFC 8174

Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words, May 2017

Canonical URL:
https://www.rfc-editor.org/rfc/rfc8174.txt
File formats:
Plain TextPDF
Status:
BEST CURRENT PRACTICE
Updates:
RFC 2119
Author:
B. Leiba
Stream:
IETF
Source:
NON WORKING GROUP

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8174

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Abstract

RFC 2119 specifies common key words that may be used in protocol specifications. This document aims to reduce the ambiguity by clarifying that only UPPERCASE usage of the key words have the defined special meanings.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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