Istituto di Scienza e Tecnologie dell'Informazione     
Lopes N., Zimmerman A., Hogan A., Lucacsy G., Polleres A., Straccia U., Decker S. RDF needs annotations. In: W3C Workshop - RDF Next Steps (Stanford, Palo Alto, California, June 26-27 2010). Proceedings, article n. 9. W3C, 2010.
While the current mechanism of reification in RDF is without semantics and widely considered inap- propriate and cumbersome, some form of reification - speaking about triples themselves - is needed in RDF for many reasonable applications: in particular, reification allows for enhancing triples with annota- tions relating to provenance, spatio-temporal validity, degrees of trust, fuzzy values and/or other contextual information. In this position paper, we argue that - besides resolving the issue of how to syntactically rep- resent reification in the future (i.e., whether to stick with the current reification mechanism or standardise a different mechanism such as Named Graphs) - it is time to agree on certain core annotations that are widely needed. We summarise existing work and provide a possible direction towards handling reification by means of a general annotation framework that can be instantiated for those major use cases we currently see arising.
URL: http://www.w3.org/2009/12/rdf-ws/papers/ws09
Subject RDFS
F.4 Mathematical Logic and Formal Languages

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