Expiryt date in MIME and Usenet News

[Jacob Palme DSV <jpalme@xxxxxxxxx>]

RFC 1327 defines a standardized mail heading attribute with
the name "Expiry-Date:". RFC 1036 defined a standardized
Usenet News heading attribute with the name "Expires".

Since it is obvious an advantage to avoid unnecessary
differences between the format of News article headings
and mail hadings, I ask the following question:

Was the duplication a mistake, or is there some intentional
reason to have different names for the Expiry-Date heading
attribute in mail and in Netnews?

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Jacob Palme                  E-mail: jpalme@dsv.su.se
			     Phone: +46-8-664 77 48 or +46-8-16 16 67
Department of Computer and   Fax: +46-8-664 77 48 between 9 am & 2 pm WET
Systems Sciences (DSV)       Postal address: Skeppargatan 73,
Stockholm University	     S-11530 Stockholm, Sweden