Re: How to model valid time of resource properties?

2014-10-16 Thread Bernard Vatant
Hi all Quickly browsing this thread, seems to me that the Property Reification Vocabulary [1] provides exactly what is needed without going through the burden of explicit reification or named graphs, and I did not see it mentioned unless I missed something. It would be cool if this vocabulary

Re: How to model valid time of resource properties?

2014-10-16 Thread John Walker
Hi Kingsley, On October 15, 2014 at 2:59 PM Kingsley Idehen kide...@openlinksw.com wrote: On 10/15/14 8:36 AM, Frans Knibbe | Geodan wrote: On 2014-10-13 14:14, John Walker wrote: Hi Frans, See this example:

Re: How to model valid time of resource properties?

2014-10-16 Thread Hugh Glaser
Hi, On 15 Oct 2014, at 23:02, John Walker john.wal...@semaku.com wrote: Hi On October 15, 2014 at 2:59 PM Kingsley Idehen kide...@openlinksw.com wrote: On 10/15/14 8:36 AM, Frans Knibbe | Geodan wrote: ... Personally I would not use this approach for foaf:age and foaf:based_near as

Re: How to model valid time of resource properties?

2014-10-16 Thread John Walker
Hi Hugh, On October 16, 2014 at 12:45 PM Hugh Glaser h...@glasers.org wrote: Hi, On 15 Oct 2014, at 23:02, John Walker john.wal...@semaku.com wrote: Hi On October 15, 2014 at 2:59 PM Kingsley Idehen kide...@openlinksw.com wrote: On 10/15/14 8:36 AM, Frans Knibbe | Geodan

Re: How to model valid time of resource properties?

2014-10-16 Thread Kingsley Idehen
On 10/16/14 8:00 AM, Kingsley Idehen wrote: On 10/16/14 3:33 AM, John Walker wrote: Hi Kingsley, On October 15, 2014 at 2:59 PM Kingsley Idehen kide...@openlinksw.com wrote: On 10/15/14 8:36 AM, Frans Knibbe | Geodan wrote: On 2014-10-13 14:14, John Walker wrote: Hi Frans, See this

Re: How to model valid time of resource properties?

2014-10-16 Thread Frans Knibbe | Geodan
On 2014-10-14 19:24, Carsten Keßler wrote: Dear all, here’s another paper that discusses different approaches: http://carsten.io/trame-kessler-kuhn-cosit2013.pdf Thank you! Yes, that paper is also a good read. Now my head is spinning even more :-) If I may try to summarize, it is saying

Re: How to model valid time of resource properties?

2014-10-16 Thread Frans Knibbe | Geodan
On 2014-10-15 14:59, Kingsley Idehen wrote: [snip] Frans, How about reified RDF statements? I think discounting RDF reification vocabulary is yet another act of premature optimization, in regards to the Semantic Web meme :) Well, reification is mentioned in most of the texts that I have found

Re: How to model valid time of resource properties?

2014-10-16 Thread Krzysztof Janowicz
If I may try to summarize, it is saying that neither reification Not exactly, please note the difference between RDF reification and conceptual reification. IMHO, the last mentioned is the way to go. Best, Krzysztof On 10/16/2014 08:15 AM, Frans Knibbe | Geodan wrote: On 2014-10-14 19:24,

Re: How to model valid time of resource properties?

2014-10-16 Thread Kingsley Idehen
On 10/16/14 11:15 AM, Frans Knibbe | Geodan wrote: On 2014-10-14 19:24, Carsten Keßler wrote: Dear all, here’s another paper that discusses different approaches: http://carsten.io/trame-kessler-kuhn-cosit2013.pdf Thank you! Yes, that paper is also a good read. Now my head is spinning even

Re: How to model valid time of resource properties?

2014-10-16 Thread Kingsley Idehen
On 10/16/14 12:02 PM, Frans Knibbe | Geodan wrote: On 2014-10-15 14:59, Kingsley Idehen wrote: [snip] Frans, How about reified RDF statements? I think discounting RDF reification vocabulary is yet another act of premature optimization, in regards to the Semantic Web meme :) Well, reification

Re: How to model valid time of resource properties?

2014-10-16 Thread Frans Knibbe | Geodan
On 2014-10-16 12:45, Hugh Glaser wrote: Personally I would not use this approach for foaf:age and foaf:based_near as these capture a certain snapshot/state of (the information about) a resource. Having some representation where the foaf:age triple could be entailed could lead to having

Re: How to model valid time of resource properties?

2014-10-16 Thread Gannon Dick
On Thu, 10/16/14, Frans Knibbe | Geodan frans.kni...@geodan.nl wrote: ... the current state of a resource might be part of the default graph (which can remain unnamed) and historical states associated with temporal graphs. You see this in the wild

Re: How to model valid time of resource properties?

2014-10-16 Thread Dominic Oldman
Yes, this is something that we do with the CIDOC CRM ontology. Biographical records are a major part of cultural heritage and humanities work (e.g. museum biographical records, prosopography, etc) and therefore this is perhaps more developed than more general ontologies. CIDOC CRM is event

Re: How to model valid time of resource properties?

2014-10-16 Thread Pat Hayes
Kingsley, greetings. It is important to keep a clear distinction between what temporal DB calls valid time and transaction time. T-time is when the record was inserted into the databese or when it was created. This is important, basically, for internal accounting and maintenance of the DB