Minutes: XDI TC Telecon Friday 2012-03-16

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

Date:  Friday, 24 February 2012 USA

Time:  9:00AM - 10:30AM Pacific Time (16:00-17:30 UTC)

ATTENDING

Joseph Boyle 

Mike Schwartz

Giovanni Bartolomeo

Drummond Reed 

Markus Sabadello 

GUESTS

Yuriy Zabrovarnyy 

Kari Lippert

THE GOTOMEETING FOR TODAY IS:

     https://www2.gotomeeting.com/join/969244355

THE ETHERPAD LINK FOR TODAY IS:

     http://piratepad.net/wRlDJk9AwG

1) OPEN SOURCE PROJECT UPDATES

Mike
 reported that the OpenXDI Project has split OxGraph and OxServer into 
two separate projects. Mike showed a demo of the XDI messaging utility 
that now has a "view as graph" button sends the statements from the last
 message to OxGraph so it can render it. This is the first time the full
 cycle of XDI messages and corresponding graphs has been shown in 
OpenXDI.

Drummond
 reported that Phil Windley and the Kynetx team is planning to use the 
OpenXDI Project for their work integrating XDI into a KRL server.

2) UPDATED XDI GRAPH PATTERNS & STATEMENTS DOCUMENTS

Drummond uploaded new versions with feedback from a 3-day XDI intensive he just completed.

  http://www.oasis-open.org/committees/download.php/45447/xdi-graph-patterns-2012-03-15.pdf

  http://www.oasis-open.org/committees/download.php/45449/xdi-statements-for-xdi-graph-patterns-2012-03-15.pdf

Summary of changes:

All root node synonym statements are now $is statements vs. the more complex $is$is inverses.

!x
 and *x XRIs for instances and ordinals were replaced with $!x  and $*x 
to bring them into the $ namespace as discussed on an earlier  call.

A few examples were updated to make them more intuitive to newcomers.

3) XDI QUERY LANGUAGE AND PROPOSAL FOR XDI PATH BASED ON JSON PATH

Drummond
 reported that at the meetings he attended, Craig Burton suggested 
basing the query language on JSON Path (which in turn is based on XML 
Path) as a model for how a client can be queried.

  http://goessner.net/articles/JsonPath/

The
 feedback was that while path-based query might be a good starting 
point, we need to look at our fundamental requirements. Mike pointed to 
the wiki page where he had started listing these:

  http://wiki.oasis-open.org/xdi/betterGet

Reviewing
 the idea for $filter, the question was raised if you were to implement 
this, would you want to be able to specify whether the filter in 
question was with regard to the data or the arc name.

Mike proposed a sample Message:

@!1111$msg!e12ae4ad-6b23-4ad7-a804-edb538797d15/$()/(@!1111)

@!1111$msg!e12ae4ad-6b23-4ad7-a804-edb538797d15/$d!/(data:,2012-03-16T16:45:06.786Z)

@!1111$msg!e12ae4ad-6b23-4ad7-a804-edb538797d15/$do/$self$do

@!1111$msg!e12ae4ad-6b23-4ad7-a804-edb538797d15/{JWT-0.6}$token!/(data:,Z5ZCqCtS8Lv7ZGSKSZQ)

@!1111$msg!e12ae4ad-6b23-4ad7-a804-edb538797d15$do/$get/@!1111

This is a get for the graph of @!1111.

Mike asked:

How  would we specify in the $get for users = Mike?

How would we just get back literal nodes?

It was agreed we need to write up the different use cases for what kinds of queries we need to perform.

# MIKE to add use cases and examples to the XDI TC wiki page.

4) NEXT CALL

The next call is next week at the regular time (Friday 9AM Pacific Time).