* descending order then appearing time in the header in ascending order.
* May contain the "language" '*', which applies to languages other than those explicitly listed.
* This is aligned with rfc2616 section 14.4
* descending order then appearing time in the header in ascending order.
* May contain the "language" '*', which applies to languages other than those explicitly listed.
* This is aligned with rfc2616 section 14.4