Just to offer developers a bit of a break, because these issues require the highest possible concentration, I offer you to consider the following question regarding your example: <a href="http://www.youtube.com/watch?v=CsrfovOPcjk">http://www.youtube.com/watch?v=CsrfovOPcjk</a> I hope no harm was done, enjoy the weekend ... m. <div class="gmail_quote">On Fri, Apr 11, 2008 at 3:20 PM, Alban Crequy <<a href="mailto:alban.crequy@collabora.co.uk">alban.crequy@collabora.co.uk</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Le Fri, 11 Apr 2008 09:21:52 +0200, "Robert Staudinger" <<a href="mailto:robert.staudinger@gmail.com">robert.staudinger@gmail.com</a>> a écrit : <div class="Ih2E3d"> > > On Thu, Apr 10, 2008 at 4:47 PM, Alban Crequy > <<a href="mailto:alban.crequy@collabora.co.uk">alban.crequy@collabora.co.uk</a>> wrote: > > [...] > > >  1. Alice writes an Abiword document and wants to share it with > > Bob. She clicks on the "Share document" checkbox and selects Bob in > > her contact list. Bob is online and receives the proposition from > > Alice in his IM software. If he accepts, Abiword is started > > automatically with the Alice's document. > > What happens if Bob does not accept to open it immediately? Will the > document still be available for him to join the collaboration at a > later point in time? </div>When Alice sends the proposition, a new tube is created on Bob's computer and the tube is in the state Tube_State_Local_Pending: <a href="http://telepathy.freedesktop.org/spec.html#type-Tube_State" target="_blank">http://telepathy.freedesktop.org/spec.html#type-Tube_State</a> The tube remains in this state until Bob accepts or closes the tube. But Telepathy does not persist tubes: if Bob goes offline, the tube is closed and Alice has to offer a tube again. Simplified tube establishment diagram: <a href="http://people.collabora.co.uk/%7Ealban/d/2008/04/tube.png" target="_blank">http://people.collabora.co.uk/~alban/d/2008/04/tube.png</a> <a href="http://people.collabora.co.uk/%7Ealban/d/2008/04/tube.msc" target="_blank">http://people.collabora.co.uk/~alban/d/2008/04/tube.msc</a> <div class="Ih2E3d"> > >  2. Bob was editing a document with 10 other persons yesterday. He > > want to continue now but he does not remember who was hosting the > > document. He browses the available documents from his contacts and > > selects the right one. Alice receives the request from Bob and > > accepts it. Abiword opens the Alice's document. > > So the token to edit a document is not persistent over collaboration > sessions? Bob has to request again, although he's already been > invited/authenticated before? I'd rather support use case 3. Alice > should be able to revoke Bob's credentials anyways, right? </div>If we want to persist credentials and let users grant/revoke them, the Collab plugin has to implement it: Telepathy does not persist anything and does not offer any help for that. -- Alban </blockquote></div>