Hi Frans, another contribution in this direction could be the “time-indexed value in context” ontology pattern described in the following paper:
Peroni, S., Shotton, D., Vitali, F. (2012). Scholarly publishing and the Linked Data: describing roles, statuses, temporal and contextual extents. In Sack, H., Pellegrini, T. (Eds.), Proceedings of the 8th International Conference on Semantic Systems (i-Semantics 2012): 9-16. New York, New York, USA: ACM. DOI: 10.1145/2362499.2362502 [preprint at: http://speroni.web.cs.unibo.it/publications/peroni-2012-scholarly-publishing-linked.pdf] I hope it may help. Have a nice day :-) S. Il giorno 13/ott/2014, alle ore 13:54, Frans Knibbe | Geodan <[email protected]> ha scritto: > 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_jonesis 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 > > Frans Knibbe > Geodan > President Kennedylaan 1 > 1079 MB Amsterdam (NL) > > T +31 (0)20 - 5711 347 > E [email protected] > www.geodan.nl | disclaimer ---------------------------------------------------------------------------- Silvio Peroni, Ph.D. Department of Computer Science and Engineering University of Bologna, Bologna (Italy) Tel: +39 051 2094871 E-mail: [email protected] Web: http://www.essepuntato.it Blog: http://palindrom.es/phd Twitter: essepuntato
