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We extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information literature, we develop a semantics for this extension of RDF, called RDFi, and study SPARQL query evaluation in this framework.
21 p dtu 28/09/2012 221 1
Từ khóa: Incomplete Information in RDF, extend RDF, RDFi, study SPARQL query evaluation, relational databases, description logics, Open World Assumption, OWL 2,