Re: [Last-Call] [standcore.com-standards] Re: Last Call: <draft-billon-expires-06.txt> (Updated Use of the Expires Message Header Field) to Proposed Standard

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Hi John,

On 29/11/2022 20:53, John R. Levine wrote:
I only have a small nit:

RFC 5322 defines syntax for the Date header field:

   orig-date = "Date:" date-time CRLF

Note the terminating CRLF.

Our draft inherits the header's definition from RFC4021 which refers to RFC 2156 where the definition on page 88 imports its ABNF from RFC 822, since it predates 2822.  In 822 most of the white space was descibed in prose, not in the ABNF.  In 2822 the white space was made explicit, carried over into 5322.

I could certainly change the definition to use 5322 ABNF but then it won't match the one in 2156, and our point is that this is the same header that 2156 defined, just allowed in more contexts.

Both RFC 5322 and RFC 2156 intend to define the same syntax, so I don't think which one is referenced matters that much. Obviously I prefer the reference to RFC 5322, but lack of CRLF is not going to get people confused when implementing, so it is not a big deal.

Best Regards,

Alexey


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