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