Appendix B. Imported ABNF

The following core rules are included by reference, as defined in Appendix B.1 of [RFC5234]: ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote), HEXDIG (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII character).

The rules below are defined in [RFC7230]:

obs-text = <obs-text, see [RFC7230], Section 3.2.6>

The rules below are defined in other parts:

HTTP-date = <HTTP-date, see [RFC7231], Section 7.1.1.1>