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Subject: Re: [xdi] Minutes: XDI TC Telecon Thursday 1-2:00PM PT 2010-10-21
So the problem child in your diagram is +friend/=alice/+knows ??? Firstly, I would argue that in the diagram you supplied, the root node you identified is compound: its =bob+friend. Secondly, I see this as parallel to LDAP, where my DN (distinguished name) might be: uid=mike,ou=people,o=gluu So if I say uid=mike,ou=people, it is ambiguous. Similarly in HTTP URLs, you have relative and absolute URLs. Do we need some rules that distinguish relative and aboslute XRI's ? - Mike -------------------------------------------------------------------------------------- Michael Schwartz Gluu Founder, CEO mike@gluu.org https://www.gluu.org +1 646-810-8761 On Fri, 22 Oct 2010, Giovanni Bartolomeo wrote: > 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 >> > > > > ---------------------------------------------------------------- > Invito da parte dell'Ateneo: > Il tuo futuro e quello della Ricerca Scientifica hanno bisogno del > tuo aiuto. Dona il 5 x mille all'Universita' di Roma Tor Vergata > codice fiscale: 80213750583 http://5x1000.uniroma2.it
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