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draft material-- please do not cite Don’t Like RDF Reification? Creating Meta Triples Describing Triples Using Singleton
BibTeX
@MISC{Nguyen_draftmaterial--,
author = {Vinh Nguyen and Olivier Bodenreider and Amit Sheth},
title = {draft material-- please do not cite Don’t Like RDF Reification? Creating Meta Triples Describing Triples Using Singleton},
year = {}
}
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Abstract
Abstract. Meta triples provide additional information about individual triples, such as the source, the occuring time or place, or the certainty. Integrating such meta triples into semantic knowledge bases would enable the querying and reasoning mechanisms to be aware of provenance, time, location, or certainty of triples. However, an efficient RDF representation for such meta knowledge of triples remains challenging. The existing reification approach allows such meta knowledge of RDF triples to be expressed using RDF by two steps. The first step is representing the triple by a Statement instance which has subject, predicate, and object indicated separately in three different triples. The second step is creating assertions about that instance as if it is a statement. While reification is simple and intuitive, this approach does not have formal semantics and is not commonly used in practice as described in the RDF Primer. In this paper, we propose a novel approach called Singleton Property for representing meta triples and provide a formal semantics for it. We explain how this singleton property approach fits well with the existing syntax and formal semantics of RDF, and the syntax of SPARQL query language. We also demonstrate the use of singleton property in the representation and querying of meta knowledge in two examples of Semantic Web knowledge bases: YAGO2 and BKR. This approach, which is also simple and intuitive, can be easily adopted for representing and querying meta triples in other knowledge bases. draft 1
Keyphrases
draft material please meta triple rdf reification formal semantics meta knowledge singleton property different triple statement instance novel approach reification approach knowledge base semantic knowledge base rdf triple first step semantic web knowledge base second step singleton property approach sparql query language occuring time rdf primer individual triple efficient rdf representation additional information
