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Subject: Minutes: XDI TC Telecon FRIDAY 10-11:00PM PT 2011-04-29


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

Date:  Friday, 29 April 2011 USA
Time:  10:00PM - 11:00AM Pacific Time (20:00-21:30 UTC)

ATTENDING

Mike Schwartz 
Giovanni Bartolomeo 
Joseph Boyle 
Drummond Reed
Les Chasen

GUESTS
Yuriy Zabrovarnyy
Henrik Sandell

THE IDEARPAD LINK FOR TODAY IS:
     http://xdi.idearpad.org/29

Please try to preface each of your comments with your name so the
transcription into the minutes is easier.


AGENDA

1)  OXGRAPH XDI GRAPH CONVERSION UTILITY

Mike Schwartz showed the new OxGraph XDI graph conversion utility developed by OpenXDI Project lead developer Yuriy Zabrovarnyy.

Yuriy first showed the packages being created in the OpenXDI project.

He then showed the new OxGraph utility that shows the same XDI graph in three formats: XDI statement format, JSON serialization format, and XDI visual graph notation format.

  http://openxdi.gluu.info/oxGraph

All in attendence were very enthusiastic about this development, and congratuled Yuriy on this very elegantly designed utility. The visual graph representation is particularly impressive, and will be a wonderful teaching tool, starting next week at the Internet Identity Workshop.


2) XDI MESSAGING PATTERNS PAGE

Drummond pointed out that he posted this page at:

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

It includes the pattern for signed messages.


3) MODIFICATIONS TO SIMPLIFIED JSON SERIALIZATION FORMAT

Drummond sent a message to the list about two small modifications that he realized were necessary when doing the XDI Message Patterns page.

  http://lists.oasis-open.org/archives/xdi/201104/msg00028.html

This proposal is currently controversial - Mike and Yuriy are not sure that the second level of nesting JSON serialization is worth it. They are worried about recursion. Drummond pointed out that it's hard to justify why to use JSON serialization at all if we serialize one level of the graph in JSON but not the second level needed by XDI $add and $mod levels, since in those message types it is the second level that carries the XDI literal data, and that data would now need two passes of encoding (URI encoding followed by XRI encoding).

Drummond wants to study whether this pattern recurses any further, or whether it is limited to either two levels or three levels.

# DRUMMOND to do this analysis and report back.


4) GIOVANNI'S PAPER

Giovanni sent a 2 page paper to the list that summarizes the relationship between XDI and RDF Named Graphs. It will be presented in a poster session at ESWC 2011 next month.

  http://lists.oasis-open.org/archives/xdi/201104/msg00023.html

Giovanni asked if TC members could read the paper closely and then return any feedback to him.

Mike suggested sending it to Cam Newton for his feedback.

# JOSEPH to forward it to Cam Newton for his feedback.

Giovanni also noted that the resolution mechanism discussed in his paper bears on the XDI synonym discussion. Drummond will look at it again from that perspective too.

# DRUMMOND to review Giovanni's paper to understand the impact on synonyms.


4) NEXT CALLS

Internet Identity Workshop is next week so we will not have a call next week. European Identity Conference is the week after and both Drummond and Mike are attending. Since that will be in Munich, the call will be in evening, so we will play it by ear if we can do that call.

The week after that is Privacy/Identity/Innovation 2011 in Santa Clara where Drummond will be presenting, so he may not be able to attend that call.



------------
ONGOING ISSUES LIST

Each of these is a candidate for the agenda for future calls.

* TRANSACTIONAL INTEGRITY FOR XDI (added 2011-03-24)

Since  versioning, as one example, involves multiple transactions that must be  commited as a group, we will need to address transactional integrity.  Specifically, we need to define how this will be handled at the protocol  level, vs. the implementation level.

* PROPOSED CONSTRUCTS/OPERATORS FOR XDI

Discuss the following wiki page originally posted by Giovanni:

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

* DICTIONARY STRUCTURE

Mike would like an example of the PDX dictionary as soon as we can do it.

*   EQUIVALENCE SEMANTICS

Close on whether we need an additional $ word that is the equivalent
of Higgins Personal Data Model (PDM)  semantics   of h:correlation,
which is not as strong as $is.

      http://lists.oasis-open.org/archives/xdi/201006/msg00036.html

* COOL URIS

Continue previous discussion about the use of standard RDF URIs in XDI:

  http://lists.oasis-open.org/archives/xdi/201006/msg00023.html









xdi-statements-for-xdi-graph-patterns-2011-04-12.pdf

xdi-graph-patterns-2011-04-12.pdf



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