Agenda: XDI TC Telecon Friday 09:00 - 10:30AM PT 2015-01-16

NOTE THE PAPER ATTACHED TO THIS AGENDA MESSAGE as we will be discussing it on the call.
XDI TC Agenda

Following is the agenda for the unofficial telecon of the XDI TC at:

Date:  Friday, 16 January 2015 USATime:  09:00AM - 10:30AM Pacific Time (16:00-17:30 UTC)

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IRC Channel: irc://irc.freenode.net:6667/xdi
AGENDANEWS & UPDATESPRESENTATIONS/DISCUSSIONSReport from XDI editors subcommitteehttps://wiki.oasis-open.org/xdi/XdiOneSpecshttps://github.com/OASIS-XDI-Technical-Committee/xdi-spec-docbook

XDI & RDF

Drummond has produced a new document describing the four key differences between the RDF and XDI graph models and how these differences solve key problems in distributed semantic data interchange. (A copy is attached to this agenda message as Drummond would like to get a round of feedback before uploading to Kavi.)

This document grew out of our discussions about RDF and XDI in December. Since then, at Markus’ suggestion, Drummond added an explanation of the “HTTP Range 14” issue:

http://en.wikipedia.org/wiki/HTTPRange-14 

Drummond would like to go over it in detail with the TC to review its conclusions and get feedback for improving it. When mature, it can be reference for people interested in understanding the differences between the two graph models and why the XDI “branch” of the Semantic Web exists.
Variables
We still need to lock down variable syntax in order to complete the XDI ABNF as a part of the XDI Core 1.0 spec.

The minutes of last week’s TC call where Les, Markus, and Drummond discussed this:

https://lists.oasis-open.org/archives/xdi/201501/msg00002.html 

Markus’ overview of the use of variables in different situations:

https://www.oasis-open.org/committees/document.php?document_id=54770&wg_abbrev=xdi

Drummond’s proposal on distinguishing between “simple” and “complex” variables:

https://wiki.oasis-open.org/xdi/XdiVariables

Also see Drummond’s and Joseph’s recent work on the GraphModelStructure wiki page and the tree view of node types:

https://wiki.oasis-open.org/xdi/GraphModelStructure

Also see the 2014-12-19 XDI TC minutes and action items:

https://lists.oasis-open.org/archives/xdi/201412/msg00013.html

XDI Policy and Connections

Let’s continue to discuss XDI connection requests, connection invitations, link contracts, templates, community contracts, requester contracts, etc.

Open topics:

Review what happens when a connection invitation is processed.

What do “deferred” connection requests look like, and how are they processed? How do we handle cases where user interaction is required?

Template versioning - what if the Template Authority changes a template? How does this affect existing LC instances? Should versioning for LC templates be mandatory?

Topics discussed previously:

Discuss different ways for an RA to receive a copy of a new link contract instance

Challenge of correlating message requests and responses

Issue related to having multiple link contract instances based on one link contract template (how to algorithmically determine the address?)

Insight: A link contract instance may be used by many authorities that can satisfy a policy _expression_ (e.g. groups, roles, organization membership)

Insight: Just like there can be a connection invitation, there can also be invitations for any other operation, e.g. $get

Collection of Documents:

XDI Policy draft spec:

https://www.oasis-open.org/committees/download.php/54276/XDIPolicyDraft%20v8.docx

XDI Connections draft spec:

https://www.oasis-open.org/committees/download.php/54279/XDI%20Connections%20V1.docx

Link Contract Instantiation:

https://www.oasis-open.org/committees/download.php/54205/LinkContractInstantiation25Sep2014.pdf

Community Link Contracts:

https://www.oasis-open.org/committees/download.php/54287/Community%20link%20contracts%20-%20Google%20Docs.pdf

Berkeley Deep Dive notes:

https://www.oasis-open.org/committees/download.php/53986/xdi%20deep%20dive%202014-8-27.pdf

https://www.oasis-open.org/committees/download.php/53985/linkcontractExamples.pdf
Transactional integrity
We have discussed the topic of transactional integrity a number of times in the past without reaching a conclusion. This seems to now have new relevance in conjunction with link contract instantiation.

The following document has a section titled “XDI Message Transactional Integrity Notes”, let’s review and discuss:

https://www.oasis-open.org/committees/download.php/53921/LinkContractInstantiation17Aug2014.pdf
NEXT CALL
The next call is next week at the regular time.

Attachment:
RDF-and-XDI-Graph-Models-v2.pdf

Description: Adobe PDF document