Re: [xdi] Minutes: XDI TC Telecon Thursday 1-2:00PM PT 2010-10-21

["Giovanni Bartolomeo" <giovanni.bartolomeo@uniroma2.it>]

As per my AP, here is attached a picture which illustrates my concern:

> Giovanni suggested that Drummond's picture is in fact an overlap of multiple
> graphs. This can be a problem from a semantic point-of-view because the
> graph can be interpreted differently depending on the node you start from,
> and on the arcs you consider in moving from one node to the other (i.e. the
> "path" you follow might correspond to a semantically invalid statement).

i.e. that there may be interpretations of the graph introducing  
statements that were not present in the original document.


Kind Regards,
Giovanni


Def. Quota "Drummond Reed" <drummond.reed@xdi.org>:

> Following are the minutes of the unofficial telecon of the XDI TC at:
>
> Date:  Thursday, 21 October 2010 USA
> Time:  1:00PM - 2:00PM Pacific Time (21:00-22:30 UTC) - SEE NOTE ABOVE
>
> ATTENDING
>
> Joseph Boyle
> Kaliya Hamlin
> Markus Sabadello
> Michael Schwartz
> Drummond Reed
> Giovanni Bartolomeo
>
> GUEST
>
> Jay Glasgow
>
> THE GOTOMEETING FOR TODAY IS:
>      https://www2.gotomeeting.com/join/969244355
>
> THE IDEARPAD LINK FOR TODAY IS:
>       http://xdi.idearpad.org/11
>
> Please try to preface each of your comments with your name so the
> transcription into the minutes is easier.
>
>
> AGENDA
>
> (Per the action items agreed in last week's meeting, plus one new one)
>
>
> 1) SUBJECT/PREDICATE/OBJECT DISTINCTIONS
>
> Go over Giovanni's email about his concerns  about current patterns for
> expressing subjects, predicates, objects and  contexts in the XDI global
> graph.
>
>    http://lists.oasis-open.org/archives/xdi/201010/msg00020.html
>
> Drummond posted a response at:
>
>   http://lists.oasis-open.org/archives/xdi/201010/msg00022.html
>
> Drummond walked the TC through the response he posted.
>
> Giovanni suggested that Drummond's picture is in fact an overlap of multiple
> graphs. This can be a problem from a semantic point-of-view because the
> graph can be interpreted differently depending on the node you start from,
> and on the arcs you consider in moving from one node to the other (i.e. the
> "path" you follow might correspond to a semantically invalid statement).
>
> # ACTION: Giovanni will write up an example of the issue(s) about which he
> is concerned.
>
>
> 2) PROPOSED CONSTRUCTS/OPERATORS FOR XDI
>
> Giovanni posted the following wiki page:
>
>   http://wiki.oasis-open.org/xdi/XdiNewFoundation
>
> We discussed the final question on the page. Markus pointed out that in
> object-oriented programming there are three basic types of relationships:
> association, aggregation, and composition, but that XDI didn't need to make
> the distinction right now.
>
> Giovanni tended to agree with Markus to keep it simple at this time and only
> deal with aggregation.
>
> # ACTION: Giovanni will add one more construct, reification.
>
> Giovanni said the next steps should be:
>
>  * All TC members review these constructs/operators.
>  * Then we will do the mapping to XRIs.
>
>
> 3) DICTIONARY STRUCTURE
>
> Mike has prepared a basic dictionary structure in Python for personal
> attributes. Drummond was not able to do the mapping to an XDI dictionary
> structure yet, but will do that tonight.
>
> # ACTION: Mike to send the TC list (or just Drummond) the text output of his
> Python.
>
>
> 4) NEXT CALL
>
> The next call is next week at the regular time.
>
>
> ------------
> ONGOING ISSUES LIST
>
> Each of these is a candidate for the agenda for future calls.
>
> *   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
>



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concerns.pdf