Minutes: XDI TC Telecon Thursday 1-2PM PT 2010-03-25

[Drummond Reed <drummond.reed@xdi.org>]

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

Date:  Thursday, 25 March 2010 USA
Time:  1:00PM - 2:00PM Pacific Time (21:00-22:00 UTC)

ATTENDING

Bill Barnhill

Markus Sabadello

Drummond Reed

 

REGRETS

Giovanni Bartolomeo

 

GUEST

Joe Boyle

 

1) $HAS SEMANTICS

A new realization was posted by Drummond:

   http://lists.oasis-open.org/archives/xdi/201003/msg00006.html

 

He explained that this was a key step forward in terms of clarifying $has semantics.

 

Bill said that $has statements express a relationship between a set and its members. He believes the meaning of that membership relationship may vary depending on the subject of the $has statement. He gave the example of +shape as a generic predicate and +ball/+shape as a specific predicate -- in the latter case the set of objects will be more limited.

 

Bill also said that he believes all of XDI can be built from four basic XDI predicates:

 

1) $is$a -- existence and type

2) $has -- membership and containment

3) $and -- intersection between two XRIs

4) $or -- union between two XRIs

 

 

2) X3J (X3 FOR JSON) SERIALIZATION FORMAT DISCUSSION

 

Drummond explained that there is very strong interest in the new X3J format.

 

Bill agrees with the decision on the last telecon that both X3J and X3 Standard should be required of conforming XDI servers.

 

Bill is currently building an XDI data store based on Node.JS (a server-side Javascript -- see http://en.wikipedia.org/wiki/Node.js). Node.JS is the scripting engine that is run in Chrome.

 

Bill would like to complete his implementation and then post his notes and suggestions withing the next week.

 

3) XRI CROSS-REFERENCES AS XDI ADDRESSES

Drummond has a proposal for how cross-references should be interpreted semantically.
We ran out of time - he will raise this on the list.

 

 

5) NEXT CALL

 

The next call is next week at the regular time. The week AFTER that (April 8) there will be no call due to travel and spring break.