Re: [Simple] Questions about SIMPLE

inline.

Nadezhda Fedorova wrote:

> Hello all,
> 
>      Could you please answer some questions about SIMPLE?
>      I need to make IM System based on SIP and SIMPLE, so I've read a lot of
>      documents about SIMPLE and didn't find answers to them.
>      Please answer me if you can.
> 
>      Here are the questions:
> 
>      1. Is it possible to use resource lists (RL) not only for defining list of my
>         buddies and subscribing to events from them, but e.g.
>         for inviting many people to a dialog,
>         or for sending a message to all of them simultaneously?

That is just now under consideration. The xcap-list spec was recently 
updated to allow for this possibility:

http://www.ietf.org/internet-drafts/draft-ietf-simple-xcap-list-usage-01.txt

although there is no specifics for message or invite. This is also 
intimately related to the recent exploders work:

http://www.ietf.org/internet-drafts/draft-camarillo-sipping-exploders-01.txt
http://www.ietf.org/internet-drafts/draft-camarillo-sipping-explode-method-00.txt
http://www.ietf.org/internet-drafts/draft-camarillo-sipping-exploders-solution-00.txt

>         
>         If it is, then what must be the behaviour of UAC and UAS when
>         UAC sends a message to all buddies from his RL and some of
>         buddies are offline and some online?

Unless the server explicitly supports the notion of messaging to a 
group, the server would return a 405 indicating that this method is 
not allowed on that resource.

>          
>      2. Are there any common mechanisms (rules) for sending offline messages
>         (I mean rules for sending a message to a user when he is
>          offline)?

No standards work has been done in this area at this time. We do have 
some requirements that were written about it some time ago:

http://www.jdrosen.net/papers/draft-rosenberg-simple-messaging-requirements-00.txt

> 
>      3. How can I SUBSCRIBE to all events from a resource?
> 

That is not supported.

-Jonathan R.
-- 
Jonathan D. Rosenberg, Ph.D.                600 Lanidex Plaza
Chief Technology Officer                    Parsippany, NJ 07054-2711
dynamicsoft
jdrosen@dynamicsoft.com                     FAX:   (973) 952-5050
http://www.jdrosen.net                      PHONE: (973) 952-5000
http://www.dynamicsoft.com

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