Re: [lemonade] Food for thought - Notifications and Filters

[Randall Gellens <[e-mail]>]

At 2:58 PM +0100 7/23/07, Alexey Melnikov wrote:

>  On the other hand I think the Profile Bis document should reference
>  draft-ietf-lemonade-notifications informally. Informally, because there
>  is no single notification protocol that the WG can agree on. And even if
>  we can agree on a single protocol, currently there is no document
>  describing how Lemonade notifications can be represented/carried by such
>  protocol.

I'm not sure the notifications protocol is the most important issue. 
I think there are essentially three major issues in notifications 
from a lemonade perspective: First, how does the server know for 
which events it should generate a notification; second, to what 
address is the notification sent; and third, what is the 
format/content of the notification.  A fourth issue, what is the 
protocol used to send the notification, is less important, since if 
the first three are standardized, the fourth can be left for later to 
see what shakes out.

Notifications is vital for a push email user experience.  As much as 
I'd like to say "just use IMAP IDLE over a long-lived TCP connection 
with traffic channel dormancy mode," there are environments where 
this just isn't supported or it doesn't work well.  There are 
deployments today of various ad-hoc solutions, often some variant of 
"send an SMS when new mail arrives in the Inbox."

I share the concerns over delaying the Profile document, but I wonder 
if there isn't some very minimal specification that would be roughly 
equivalent to what has been deployed now, which we could adopt or at 
least refer to.  This would be much better than nothing, even if it 
falls far short of what can be done with whatever BIFF BOF does.
-- 
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
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A child of five would understand this.  Send somebody to
fetch a child of five.        --Groucho Marx, _Duck Soup_


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