Minutes: XDI TC Telecon Thursday 1-2:30PM PT 2011-04-14

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

Date:  Thursday, 14 April 2011 USA

Time:  1:00PM - 2:30PM Pacific Time (20:00-21:30 UTC)

ATTENDING

Giovanni Bartolomeo 

Joseph Boyle

Michael Schwartz

Drummond Reed

Bill Barnhill

GUEST

Phil Wolff

THE IDEARPAD LINK FOR TODAY IS:

     http://xdi.idearpad.org/28

1)  REVISED XDI GRAPH PATTERN DOCUMENT AND CORRESPONDING XDI STATEMENT DOCUMENTS

We
 reviewed a  new version (2011-04-12) of the XDI Graph Patterns document
 together  with a second document, XDI Statements for XDI Graph 
Patterns. The Kavi links for these documents have now been fixed:

  http://www.oasis-open.org/committees/download.php/41832/xdi-graph-patterns-2011-04-12.pdf

  http://www.oasis-open.org/committees/download.php/41834/xdi-statements-for-xdi-graph-patterns-2011-04-12.pdf

The
 changes in this version were to the Link contract and Messaging  
patterns to reflect a simpler approach to $do structures -- see topic #3
 below.

# DRUMMOND start XDI TC wiki page with XDI messaging examples.

2) $WORDS AND +WORDS

Drummond
 explained that the semantics of $ words are specied by the XDI TC, 
whereas the semantics of +words are specfiied by an open community 
process in which the XDI TC or any other body is just a participant, 
e.g., a Wikipedia model. This means $ words are very limited set of 
"reserved words" that are exclusively for specifying either: a) the 
grammar of the XDI graph model itself, or b) the universal requirements 
of the XDI protocol.

3) XDI MESSAGING PATTERN

Drummond,
 Mike, and Yuriy from the OpenXDI Project have spent time on  this over 
the past week. The OpenXDI wiki has a page showing the first  examples 
at:

  http://openxdi-wiki.gluu.info/doku.php?id=usecases:poken-high4

We
 discussed message IDs and message state. Bill explained his rationale 
for a sequential or predicatable ID for message verification. Drummond 
shared the view that the minimum requirement is for a unique ID, but not
 require a more specialized ID.

We
 agreed that we should experiment with messaging implementation, much as
 we did two years ago with X3 and Markus Sabadello's XDI4J code base.

Bill
 noted that there may be encoding issues with some of the data: URIs in 
these examples. He pointed out the Data URI converter available at:

   http://software.hixie.ch/utilities/cgi/data/data

   

4) NEXT CALL

Due
 to workload for the upcoming Internet Identity Workshop, there will NOT
 be a call next week. The next call will be Thursday April 28 at the 
regular time.

------------

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