Actually, what there is is an experimental Internet Draft which has been
published by the HTML Working Group that describes "Form-based File Upload
in HTML". This and other Internet Drafts produced by HTML-WG are accessible
from:
http://www.ics.uci.edu/pub/ietf/html/
The specific document that describes file uploads is:
http://www.ics.uci.edu/pub/ietf/html/draft-ietf-html-file-upload-03.txt
Happy reading.
Michael Johnson
Relay Technology, Inc.
http://mordor.relay.com/
The opinions above are my own and not necessarily shared by Relay Technology