RFC 5234, "Augmented BNF for Syntax Specifications: ABNF", January 2008Source of RFC: IETF - NON WORKING GROUP
Area Assignment: app
Errata ID: 4564
Publication Format(s) : TEXT
Reported By: iliwoy
Date Reported: 2015-12-14
Rejected by: Barry Leiba
Date Rejected: 2015-12-14
Section 3.8 says:
[foo bar] is equivalent to *1(foo bar).
It should say:
[foo bar] is equivalent to *1(foo/bar).
It seems that the reporter misunderstands what "[foo bar]"
means. It means that "foo bar" (the two tokens together, as a unit)
is optional. It is not suggesting an alternative of "foo" or "bar".