[jdev] SVG Whiteboarding

Michal vorner Vaner michal.vaner at kdemail.net
Thu Jun 8 02:50:49 CDT 2006

On Wed, Jun 07, 2006 at 03:50:46PM -0700, Joonas Govenius wrote:
> Hi everyone,
> I've just started to work on a Google Summer of Code
> project to design support for SVG based whiteboarding
> for Jabber. I've put up some notes outlining the basic
> principles of the protocol at the Jabber wiki if
> you're interested, comments would be lovely,
> especially if they demolish the proposed principles of
> the protocol so that I won't have to start from
> scratch a month from now when I realise it myself:
> http://wiki.jabber.org/index.php/Psi_Whiteboarding#Progress
> However, I also have a couple of quick question that
> I'd like some "authorative" answers for:
> 1. Am I right in assuming that a message can be lost
> somewhere between clients so that the sender thinks
> its delivered but actually isn't?

It should not be lost. It can be lost in a case when the other side
loses connection, the server goes down or thing like this.

I guess would not recover from such situation anyway.

But, if you really want to get a reply 'yes, I got the data', you should
use <iq> instead.

> 2. Should the protocol specify how to handle a <body>
> in a <message> containing whiteboard data? Should it
> be allowed?

Personally, I would not allow that. Actually, personally I would use <iq>
stanzas and allow standalone implementations (which do not have the IM
client, only whiteboard) to set priority to negative and not receive
messages at all.

> Thanks,
> Joonas
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One semi-random fortune: 

Einstein argued that there must be simplified explanations of nature, because
God is not capricious or arbitrary.  No such faith comforts the software
                -- Fred Brooks

Michal "vorner" Vaner
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