Minutes: XDI TC Telecon Thursday 1-2PM PT 2009-03-12

["Drummond Reed" <drummond.reed@cordance.net>]

Following are the minutes of for the unofficial telecon of the XDI TC at:

Date:  Thursday, 12 March 2009 USA
Time:  1:00PM - 2:00PM Pacific Time (21:00-22:00 UTC)

ATTENDING

John Bradley
Drummond Reed

REGRETS

Nick Nicholas 
Markus Sabadello 

(Several attendees missed this meeting due the time change in the U.S.)


1) DICTIONARIES, CLASSES, AND SCHEMAS

Given the light attendance, John wanted to explore classes, individuals, and
their relationships. Key points Drummond and John discussed:

* In the context of an XDI statement, all XRIs that include even a single
qualified XRI subsegment (a subsegment that includes a delimiter) inherently
infer XDI metagraph statements because of the inferred $has statement. This
was a surprising realization.

* A class definition may exist in any context, and it does not require that
any individuals exist, nor does it require that if an individual of this
class exists, that all the predicates of this individual exist.

* Access to specific predicates and objects of a subject is not granted
automatically on the basis of them existing for that subject, but can be
controlled via a link contract.

* Such predicate/object nodes do not necessarily exist in the actual graph
until they are populated, however they may exist from a semantic reasoning
standpoint.

* XDI dictionaries are themselves XDI RDF graphs.


2) NEXT CALL

Regular time next Thusday 3/19. NOTE THAT THE US HAS SHIFTED TO DAYLIGHT
SAVINGS TIME.