Re: [xdi] Agenda: XDI TC Telecon Thursday 1-2PM PT 2010-02-18

On Sat, Feb 20, 2010 at 3:24 AM, Markus Sabadello <markus.sabadello@xdi.org> wrote:

Hi Bill,

On the call everyone was in agreement that it's probably better to not support comments at all in X3J, rather than inventing $ words, which would only create confusion as to whether the comments are part of the graph or not..

Regarding the other questions, we thought maybe it would be easiest to directly map the 3 XDI object types (literals, references, subcontexts) to the 3 JSON primitives (value, array, object), and to map the non-existence of an XDI object to JSON null. E.g.:

+email: "markus.sabadello@gmail.com"

+friend: ["=bill.barnhill", "=giovanni", "=drummond"]

+email: { .. object here following the same patterns as the top-level graph object .. }

+predicate.without.object: null

Do you think this would work? How close is this to your current implementation?

Markus

On Thu, Feb 18, 2010 at 10:53 PM, Barnhill, William [USA] <barnhill_william@bah.com> wrote:

Thanks. Yes, I've got an alpha-stage implementation built on Node.js. It's an implementation of the basic XDI ops though, I'm still working on getting connected to OpenXRI via WebSocket protocol. I'm going to be on client site until about 10pm tonight, but will work on documenting how I addressed those issues in the implementation (most of them you raised earlier on the mailing list too I think), but the stream of consciousness versions are:

Note 1: Yeah,I did basically the same thing you suggest later on - basically as an object within an object, need to check though on exact format

Note 2: Again used objects, with reference being an object in a certain form (need my code to give specifics on the form), I think I wound up doing it like your note 3, except "=drummond+home": [], instead of "=drummond+home": {}. It's a little dicey as then how do you tell difference between asserting that there are no values for =drummond+home and asserting a reference, but with semantic Open World Model which we adopted that point should become moot.

Note 3: see above

Note 4: Yeah, I ran into this very early on in impl. Solved by having the value associated with a predicate key be a JSON list,
var doc = {"=drummond+home": [{"+email" : [ "drummond@example.org" ]} ]}

This has the nice property that in Javascript we can then do a JSON path like doc["=drummond+home"][0]["+email"] and the javascript engine will understand it and return "drummond@example.org".

As for comments, I don't have programmatic accessible comments, I'm not decided on whether that's a good thing or a bad thing. This is something I haven't solved but have thought some about. I realize the lure of XML style comments (which are a bit of both), but am lean towards XSD:annotation style of comments, which would mean the comments are just XDI data like the rest of the XDI data. We could if we wanted to have a reserved XRI $ word like $annotatedBy which I think would serve well. Another could serve as the XDI equiv of PI directives, say $decoratedBy. What do you think?

Kind regards,

Bill Barnhill
Booz Allen Hamilton - Rome, NY
315-330-7386 | william.barnhill.ctr@rl.af.mil | barnhill_william@bah.com
________________________________________
From: markus.sabadello@gmail.com [markus.sabadello@gmail.com] On Behalf Of Markus Sabadello [markus.sabadello@xdi.org]
Sent: Thursday, February 18, 2010 4:04 PM
To: Barnhill, William [USA]
Cc: Drummond Reed; OASIS - XDI TC
Subject: Re: [xdi] Agenda: XDI TC Telecon Thursday 1-2PM PT 2010-02-18

Hi Bill,

Yep X3J seems to be really useful. Your notes suggest you implemented it already!
Regarding syntax, I just added a few notes to the Open Issues section.

Markus

On Thu, Feb 18, 2010 at 7:25 PM, Barnhill, William [USA] <barnhill_william@bah.com<mailto:barnhill_william@bah.com>> wrote:

My apologies but due to client I will not be able to attend today's telecon. I understand importance of X3J (X3 JSON Syntax) closing - could anyone that has issues with X3J please put those issues in the Open Issues section that is now on the X3 wiki page? I'll respond to them within 24 hours. I've edited that page with the start of some updates that I will/must complete by Feb 21. The added content includes a proposal that X3J be adopted as the primary XDI serialization format for the reasons listed on the page.

________________________________________

From: drummond.reed@gmail.com<mailto:drummond.reed@gmail.com> [drummond.reed@gmail.com<mailto:drummond.reed@gmail.com>] On Behalf Of Drummond Reed [drummond.reed@xdi.org<mailto:drummond.reed@xdi.org>]

Sent: Thursday, February 18, 2010 4:25 AM
To: OASIS - XDI TC
Subject: [xdi] Agenda: XDI TC Telecon Thursday 1-2PM PT 2010-02-18

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

Date: Thursday, 18 February 2010 USA
Time: 1:00PM - 2:00PM Pacific Time (21:00-22:00 UTC)

PLEASE DIAL ONE OF THE FOLLOWING NUMBERS:

1) Skype Number: +9900827047990866
(this will connect you directly to the conference room)

2) US/Canada Toll Number: +1-201-793-9022 7990866#

3) International Toll Number (follow this with the Conference Room Number:
7990866#)
Austria (0820 401 15470)
Belgium (0703 57 134)
France (0826 109 071)
Germany (0180 500 9527)
Ireland (0818 270 968)
Spain (902 885 791)
Switzerland (0848 560 397)
United Kingdom/Northern Ireland (0870 0990 931)

AGENDA

1) GIOVANNI METAMODEL DISCUSSION CONTINUED

See the slides Giovanni posted at:

http://www.oasis-open.org/committees/download.php/36424/semantic-kit4xdi.pdf<http://lists.oasis-open.org/archives/xdi/201001/msg00065.html>

2) X3J (X3 FOR JSON) SERIALIZATION FORMAT DISCUSSION

There is now a more urgent need to close on this format - Drummond and Markus will explain on the call. The previous thread that currently ends with Bill's message is at:

http://lists.oasis-open.org/archives/xdi/201001/msg00010.html

3) XDI GRAPHER

See the thread started by Markus at:

http://lists.oasis-open.org/archives/xdi/201001/msg00001.html

and his XDI Grapher app at:

http://graceland.parityinc.net/xdi-grapher/XDIGrapher

<http://lists.oasis-open.org/archives/xdi/201001/msg00010.html>

4) NEW BUSINESS

5) NEXT CALL

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