Re: How to model valid time of resource properties?

Hi,

our paper [1] surveys all the possible approaches for representing temporal information in the context of Linked Data. You may find it useful for your work.

Best regards,
Anisa

1. http://iswc2012.semanticweb.org/sites/default/files/76490481.pdf


On 13 Oct 2014, at 14:16, Sarven Capadisli <info@csarven.ca> wrote:

> On 2014-10-13 13:54, Frans Knibbe | Geodan wrote:
>> Hello!
>> 
>> I wonder if a way of recording changes in properties of resources can be
>> recommended. Many resources in real life have properties that have a
>> time range of being valid. In some datasets, only the current (or most
>> recent) state of a resource is stored, but in many cases it is important
>> to keep track of the history of development of a resource.
>> 
>> An example:
>> 
>> :john_smith
>>     a foaf:person ;
>>     foaf:name "John Smith" ;
>> 
>> Let's say that on 2013-09-27 John Smith marries Betty Jones. John Smith
>> is still the same person, so it makes sense to extend the same resource,
>> not create a new version:
>> 
>> :john_smith
>>     a foaf:person ;
>>     foaf:name “John Smith” ;
>>     ex:marriedTo :betty_jones ;
>> 
>> How could I efficiently express the fact that the statement :john_smith
>> ex:marriedTo :betty_jones is valid from 2013-09-27? And if the couple
>> divorces, that the property has expired after a certain date? It would
>> be nice if the way of modelling makes it easy to request the most recent
>> state of a resource, any historical state, or a list of changes during a
>> time period.
>> 
>> A quick web scan on the subject revealed some interesting research
>> papers, but as far as I can tell all solutions need extensions of RDF
>> and/or SPARQL to work.
>> 
>> Perhaps this question is really about the ability to make statements
>> about a triple? Which is a problem for which no satisfactory solution
>> has been found yet?
>> 
>> Regards,
>> 
>> Frans
> 
> Hi Frans,
> 
> This is not a comprehensive answer on this topic, but you might want to take a look at PROV-O [1] (which can address validity and history of entities) and maybe even employ OA [2].
> 
> Capturing temporal dimension of linked data by Jindřich Mynarz is an excellent read [3].
> 
> [1] http://www.w3.org/TR/prov-o/
> [2] http://www.openannotation.org/spec/core/
> [3] http://blog.mynarz.net/2013/07/capturing-temporal-dimension-of-linked.html
> 
> -Sarven
> http://csarven.ca/#i