On 03.05.20 19:45, John C Klensin wrote:
The first paragraph of Section 4.1.2 of RFC 5321 (and
rfc5321bis-03) concludes with
"Terminals not defined in this document, such as ALPHA,
DIGIT, SP, CR, LF, CRLF, are as defined in the "core"
syntax in Appendix B of RFC 5234 [5] or in the message
format syntax in RFC 5322 [11]."
So you can't say "no reference..." However, it has been clear
to me for some time that turning that statement into a specific
list of productions defined in 5334 (not "such as" handwaving)
and a separate list of productions defined in 5322 and then
indexing both would be a considerable improvement. If someone
wants to do the work of preparing those lists, I'd be happy to
fold them into 5321bis and provide an acknowledgment.
From RFC 5234:
- ALPHA
- DIGIT
- SP
- CRLF
- HEXDIG
From RFC 5322:
- atext
- FWS
- CFWS
CR and LF are not used in ABNF rules.
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