Hi John,
At 05:49 PM 29-06-2018, John C Klensin wrote:
Anyone have comments on this? I don't remember whether there
was a reason it was done the way it was or if that was just a
dumb ABNF error.
The argument when the ABNF was discussed was: "The reader is
cautioned that the grammar expressed in the metalanguage is not
comprehensive. There are many instances in which provisions in the
text constrain or otherwise modify the syntax or semantics implied by
the grammar" [1]. The issue is interlinked with "Quoted-string" in
what was the RFC 2822 update.
Regards,
S. Moonesamy
1. Please see Section 2.4 of RFC 5321
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