[Simple] Re: [Sipping] MESSAGE Exploders draft

Miguel,

In general the approach in the draft seems reasonable to me.

I see one area of ambiguity, having to do with how multipart bodies are 
handled. The draft says to remove the list and include everything else. 
But even your example doesn't do that - it also removes the 
multipart/mixed wrapper. Of course in this particular example that makes 
perfect sense, but it goes beyond what the draft says to do.

There are more complex cases:

- for security there could be signed body parts.

   - The signature could be on the multipart containing the message
     and list. It would have to be removed.

   - The signature could be on just the message. Presumably
     it should remain.

- There could be other body parts referenced by cid: urls in
   other headers in the message.

I think there needs to be a more prescriptive way of defining what gets 
passed on in the exploded messages. This is really just a manifestation 
of a more general problem of how to decide how different body parts 
should be processed. It potentially exists in a normal, unexploded, MESSAGE.

I think at least part of the answer lies with Content-Disposition. I 
think there should be clarity about the content-disposition should be 
for the body part(s) that MESSAGE interprets as message content. 
Probably "render" (which is default for sip) would be an appropriate 
content-disposition for message content.

Also, I think there should be some clarity about what the 
content-disposition should be for various kinds of multipart containers 
when used in the various ways they may be used in sip. I'm not quite 
sure what the answer is here.

The list itself is of course referenced from a cid: url. It is the url 
and its placement that determines how the corresponding body part should 
be processed. For these, the content-disposition should be some value 
that doesn't imply some other sort of processing. I think it can't be 
any of "session", "render", "alert", or "icon". Maybe it could be 
"attachment".

	Paul

Miguel Garcia wrote:
> Hi:
> 
> I have just submitted a draft that discusses a exploder of MESSAGEs.
> 
> While it appears in the repository, you can download them from:
> 
> http://people.nokia.net/~miguel/drafts/draft-garcia-simple-message-exploder-00.txt 
> 
> http://people.nokia.net/~miguel/drafts/draft-garcia-simple-message-exploder-00.html 
> 
> 
> Since this is an area covered by SIMPLE (Instant Messaging) and SIPPING 
> (exploders), I am copying both mailing lists.
> 
> Regards,
> 
>      Miguel

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