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

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REGRETS

Giovanni Bartolomeo

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GUEST

Joe Boyle

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1) $HAS SEMANTICS

A new realization was posted by Drummond:

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

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

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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.

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

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1) $is$a -- existence and type

2) $has -- membership and containment

3) $and -- intersection between two XRIs

4) $or -- union between two XRIs

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2) X3J (X3 FOR JSON) SERIALIZATION FORMAT DISCUSSION

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

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

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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.

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

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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.

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5) NEXT CALL

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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.

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