…) | ( ext-name-star "=" ext-value ) ext-name-star = parmname "*" ; reserved for RFC2231 -profiled ; extensions. Whitespace NOT ; allowed in between. ptoken = 1*ptokenchar ptokenchar = "!" | "#" | "$" | "%" | "&" | "'" | "(" | ")" | "*" | "+" | "-" | "." | "/" | DIGIT | ":" | "<" …

… value does not contain any octets that require encoding. The second form uses [RFC2231] to allow arbitrary octets to be encoded. With either form, quotes allow for commas and other characters in <tspecials> (quotes MAY be used even when not required). [...] The BNF syntax is as …

… value does not contain any octets that require encoding. The second form uses [RFC2231] to allow arbitrary octets to be encoded. With either form, quotes allow for commas and other characters in <tspecials> (quotes MAY be used even when not required). [...] The BNF syntax is as …