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Subject: Minutes: XDI TC Telecon Thursday 8-9AM PT 2008-02-21
Following are the minutes of the unofficial telecon of the XDI TC at: Date: Thursday, 21 Febrary 2008 USA Time: 8:00AM - 9:00PM Pacific Time Event Description: Weekly unofficial call of the XDI Technical Committee. ATTENDING Bill Barnhill John Bradley Victor Grey Drummond Reed Nat Sakimura Markus Sabadello 1) CALL TIME As Nat was able to join us, we had the opportunity to discuss the telecon timing. Drummond mentioned that another international workgroup had concluded that 9PM GMT (1PM Pacific) was the only time that worked for Europe, the U.S., and Japan continents -- it's 6AM in Japan and 10PM in Italy, but still allows us to all get on the same call together. There was agreement that having a consolidated call would be worth it, and Nat confirmed that 9PM GMT would work for him and the other NRI team member he would like to have join TC soon. Bill also said the time would work better for him as it would not conflict on alternating weeks with the OASIS TAB telecon. # DRUMMOND to send a message to the list about moving the telecon to 9PM GMT (1PM Pacific) on Thursdays. 2) WORKGROUPS In mailing list discussion of the minutes of last week's telecon, there has been a general consensus that the TC should form workgroups to "divide and conquer" the work we have to prepare for the XDI 1.0 specifications. Drummond started the following wiki page to track proposals: http://wiki.oasis-open.org/xdi/WorkGroups Discussion: * Victor said he wanted to make sure that workgroups did not splinter the work of the TC, since he wanted to stay involved in several of them. There was consensus on this point. * Drummond explained that there are two basic options: "heavyweight", which would mean using formal OASIS subcommittees with their own chairs and mailing lists, or "lightweight", which would mean self-organizing workgroups that used wiki pages and threads on the main TC mailing list. There was consensus that the lightweight workgroup option was preferable. * There was also consensus that we should align workgroups with our specification deliverables. * We discussed initial strawman proposals on the wiki page. The consensus was that we should not try to produce one monolithic XDI Dictionary specification, but instead produce small, moduler specifications covering specific applications of XDI dictionary semantics. The SAML specification suite was used as an example. * Bill specifally advocated how XMPP has organized their specs. See: http://www.xmpp.org/extensions * Bill pointed to XMPP extension proposal 211 is a way to roll up all the extensions into different clients -- a bare-bones client, a mid-level client, and a full-featured client. Bill feels that's the reason XMPP has more adoption than SIP. * Further discussion produced the following initial outline of specifications: 1) Overview and Conformance * Basic XDI Client * Advanced XDI Client 2) XDI RDF Graph Model ("Core") * Abstract API * Contexts * Serialization 3) REST-based API * Messages * Operations * HTTP Binding 4) Asynchronous API 5) Dictionary * Typing * Comparison Operators * Transformations 6) Versioning 7) Link Contracts * Bill suggested that we have an information document about known XDI Implementations. * John felt the modular approach would also make it easier to take current implementation experience and feed it into the specific areas. * Drummond said that if there was consensus on this set of deliverables, we could finally update them in our long-awaited charter clarification. # DRUMMOND to update http://wiki.oasis-open.org/xdi/WorkGroups to reflect these notes. (DONE) 3) ATI MODEL DISCUSSION There was a brief discussion of the direction of the ATI model. John explained that ooTao, the company he is working with, has a commercial implementation of the ATI model with a customer base. * Bill said he'd like to have that work continue to be recognized by the TC. * John pointed out that the ATI model also supports RDF. * Drummond agrees strongly that "XDI RDF" is somewhat of a misnomer -- while it is more directly based on the RDF graph model than ATI, both of them can be transformed into conventional RDF. * John suggests that if the two efforts stay together, we should emphasize the similarities rather than the differences. * Drummond acknowledged the depth of the ATI thinking and development and said "the two genetic strains have 80% common genes". * Markus asked for more information on the ATI model, as newer TC members are not familiar with it. # JOHN to post a wiki page on the ATI model that has a link to the key resources. * There was consensus that John should talk with Andy and Steve about what direction they would like to take with the ATI model, and then we will schedule this for further discussion next week. # JOHN to develop proposed ATI direction with Andy and Steve. # DRUMMOND to schedule this topic for next week's agenda.
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