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Subject: Minutes: XDI TC Telecon Thursday 1-2PM PT 2008-12-18
[My apologies for the long delay on these minutes - they got stuck in the 12" of snow we had in Seattle over the holidays. Thanks to Markus for keeping notes during the call. =Drummond] Following are the minutes of the unofficial telecon of the XDI TC at: Date: Thursday, 18 December 2008 USA Time: 1:00PM - 2:00PM Pacific Time (21:00-22:00 UTC) ATTENDING John Bradley Markus Sabadello Giovanni Bartolomeo Mike Mell Drummond Reed (latter half) GUESTS Nick Nicholas (XRI TC) 1) XDI RDF GRAPHING We talked about the new document posted by Drummond: PDF: http://www.oasis-open.org/committees/download.php/30442/xdi-rdf-graphing-v1. pdf Powerpoint: http://www.oasis-open.org/committees/download.php/30441/xdi-rdf-graphing-v1. ppt Drummond could not attend the start of the call, so Markus explained what he understood about that document. It lists of a few fundamental XDI RDF constructs as XRIs and illustrates how they can be graphed. Nick explained this was motivated by his trying to understand what XDI RDF statements are generated by the proposed XRI 3.0 syntax. Specifically, one of his goals was to understand the difference between $has and $has$a statements. Markus explained that the syntax generated from $has and $has$a statements looks like this: +x/$has/+y --> +x+y +x/$has$a/+y --> +x/+y Nick suggested that concrete examples would help. He said the example he was working with involved "tables" and "legs". Legs are an integral part of a table (composition). What XRI would illustrate this relationship between a "table" and its "legs"? Another key question is the meaning of parens. They put an XRI into a different context, shown in the document with a bubble. Drummond was able to join the call and explained that the XDI concept of "contexts" and "sub-contexts" was motivated by the notion of contexts in the Higgins open source project. Contexts turned out to be a useful construct for graphing XDI RDF statements because they allow explicit modelling of the RDF concept of a "named graph". http://www.w3.org/2004/03/trix/ Giovanni pointed out that Statement 6 in the xdi-rdf-graphing-v1 document is not consistent with the link contract example found on page 33 of the xdi-rdf-model-v11 document: http://www.oasis-open.org/committees/download.php/29748/xdi-rdf-model-v11.pd f In that document, =drummond/$has/+friend$contract results in the XRI =drummond+friend$contract, but it should be =drummond(+friend$contract). Drummond agreed this should be changed in the next version. UPDATE: In his study of the Statement 6 issue identified by Markus, Drummond subsequently revised the proposed graph structure for compound $has statements. This eliminates the issue identified by Markus and also removes the inconsistency with the V11 XDI RDF Model document. V2 of the XDI RDF Graphing document has been posted at: http://www.oasis-open.org/committees/download.php/30457/xdi-rdf-graphing-v2. pdf 2) TIMING OF FIRST WORKING DRAFT Drummond wants to get started with first working drafts over the holiday break, depending on available time. An initial working draft does not have to be anywhere near complete, so this will get the specification drafting process started. 3) HOLIDAY TELECON SCHEDULE There was consensus we should take a break over the holidays. We won't hold calls over next two weeks - the next regularly scheduled call will be Thursday January 8, 2009.
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