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Subject: Re: from draft-ietf-http-negotiation-03.txt
From: Einar Stefferud <[log in to unmask]>
Reply-To:[log in to unmask]
Date:Tue, 5 Aug 1997 09:30:48 -0700

text/plain (55 lines)

Thanks Jacob -- Looks to me that you have the topic well covered;-)...

Now, have we thought much about how all this will work if two separate
messages want to reference each others MIME parts?

Suppose that I subscribe via EMail to a periodical of some kind that
will include future references to MIME barts in past issues, by URL or
by MID/CID references.

Does our MHTML spec cover this situation, or does it just punt on this
question?  Seems to me that this scenaaario is clearly in our future.


From Jacob Palme's message Tue, 5 Aug 1997 05:57:20 +0200:
}At 13:45 -0700 97-08-03, Einar Stefferud wrote:
}> Thanks Jacob -- Next question...
}> I gather that via EMail, we might deal with the negotiation
}> requirement by just sending all the alternatives.  This of course
}> could lead to sending grossly large messages of which one small
}> portion is really wanted.
}> I suppose that we might need a new MIME type, perhaps called
}>                 application/http-negotiation
}> perhaps with negotiation information in registered parameters?
}> I wonder how hard it would be to to develop this in concert with the
}> HTTP negotiation protocol efforts?
}Most plain text and plain html messages are usually not very large,
}so that this would be a problem. There are a few large messages,
}and messages get large by including large images.
}So if you use multipart/alternative, you should arrange it in
}such a way that only the text itself is sent twice (in HTML
}and in plain text format) but that accompanying images are only
}send once and can be used from both forks of the multipart/alternative.
}Our "info" document discusses how to do this.
}Another choice would be not to send large images, only send
}references to them. In HTML, this can be done by just sending
}the HTML text, but not the images it refers to. For plain
}text, the Message/external body part can be used. If a message
}is sent in two alternates, one HTML, one plain text, then
}the HTML can contain image links in the HTML code, while the
}plain text can be combined with a message/external to refer
}to where the image can be downloaded.
}Jacob Palme <[log in to unmask]> (Stockholm University and KTH)
}for more info see URL:

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