Use of MUST / MUST NOT / SHOULD / SHOULD NOT / ...

[LaurentAjdnik]

These key words are used in many places.

According to BCP14, it is recommended to incorporate this phrase near the beginning of any specification that uses them:

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

PS: Yes, I do agree to PR if needed. 😁

[jspahrsummers]

Thanks, agreed! We'd be happy to review a PR. 🙏

[LaurentAjdnik]

PR #103 sent.

Final text taken from RFC8174, which updated RFC2119:

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.