This is a draft written by Steve Dorner and myself, which is in it's
last month. (we'd better renew, or move forward!). It's available as:
ftp://ds.internic.net/internet-drafts/draft-dorner-content-header-00.txt
How about moving forward? It's needed, relatively widely implemented, and
referenced in the MIME standard. Perhaps Steve can submit it for an
extended last call, after making any spelling/etc. corrections necessary?
- Chris