On 2014-10-13 14:32, Anisa Rula wrote:
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.
Thank you, it certainly is useful. Together with all the information
available the current state of affairs is becoming clearer. By now I
think it is safe to say that at this moment it is not possible to
recommend any approach over the others..
I like the fact that your paper has pointers to actual datasets that use
particular solutions. As an example of a dataset that uses temporal
graphs to record valid time EvOnt is mentioned. I was unable to find
this data set. Is it available on the web somewhere?
Regards,
Frans
Best regards,
Anisa
1. http://iswc2012.semanticweb.org/sites/default/files/76490481.pdf
On 13 Oct 2014, at 14:16, Sarven Capadisli <[email protected]
<mailto:[email protected]>> 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
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