Excerpts from mail: 4-Nov-93 Re: A spec for showing lang.. Tim
Berners-Lee(_at_)www3(_dot_)cer (1393)
Can I ask why the "Content-"?
Probably to make it clear that it applies to body-parts. In general,
the only header fields that apply to MIME body parts (as opposed to a
top-level message or an encapsulated message) are the Content-* ones.
-- NB