US-ASCII #696
Description
In Section 5.5:
Newly defined fields SHOULD limit their values to US-ASCII octets.
This is probably overly broad considering that the ABNF says VCHAR / SP / HTAB (I question the wisdom of including HTAB, but now is not the time to worry about that). Could this be changed to "printable or visible US-ASCII octets, plus SP and HTAB"?
(Incidentally, why doesn't the field-content rule use the ABNF WSP rule?)