[Ietf-message-headers] X-Face, Face and X-Image-URL header fields

Julien ÉLIE <julien@trigofacile.com> Sat, 24 September 2016 20:17 UTC

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Subject: [Ietf-message-headers] X-Face, Face and X-Image-URL header fields
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Couldn't the Message Headers IANA registry at 
reference the following three header fields used in mail and news messages?

* X-Face for a black & white image
* Face for a coloured image
* X-Image-URL for a link to an image

What astonishes me is that there is not much specification about them in 
the Internet.  I found information in Emacs and gnus documentation, but 
I am unsure it is enough to be referenced in the above IANA registry:


Are you aware of any better specification?  (Any Internet-Draft?)  Were 
these header fields already discussed in an ART WG?

Julien ÉLIE

« Un voyage de mille lieues commence toujours par un premier pas. »
   (Lao Zi)