Talk:Augmented Backus–Naur form

"ABNF is encoded in ASCII (which is seven bits) in an eight-bit field with the high bit set to zero."

Not according to http://tools.ietf.org/html/rfc5234#section-2.4 —Preceding unsigned comment added by 193.11.187.22 (talk) 18:35, 2 March 2009 (UTC)

Expressiveness

Does anyone know what the expressiveness of ABNF grammars is? Are they context-free grammars? Do they include all CFGs? Qwertyus (talk) 18:26, 14 March 2011 (UTC)

Comment

Comment is used before it is explained — Preceding unsigned comment added by 82.59.221.134 (talk) 15:40, 16 August 2011 (UTC)

Definitions

"Definitions are left-aligned. When multiple lines are required (for readability), continuation lines are indented by whitespace." With a rule name and an equals sign to the left of the definition: "rule = definition ; comment CR LF", does this mean that continued lines for the definition are left-aligned with the first character in the definition? AnotherDuke (talk) 03:23, 23 June 2024 (UTC)

Responding to my previous item: further research seems to indicate that rules always start in column 1 of a file, meaning that any indentation of a line with content is considered a continuation of the previous line. So: "Definitions are left-aligned." apparently means in column 1. AnotherDuke (talk) 23:21, 23 June 2024 (UTC)

ABNF representation of itself: should it include errata?

I've added a new section on Wikipedia. Here is the original ABNF representation of itself published in RFC 5234: https://www.rfc-editor.org/rfc/rfc5234.html#section-4 Here is the corrected version that I used: https://www.rfc-editor.org/rfc/inline-errata/rfc5234.html DrBeryl (talk) 17:09, 5 November 2025 (UTC)