An Extension of SPARQL for RDFS.
Marcelo Arenas, Claudio Gutiérrez, Jorge Eduardo Pérez Pérez · 2007
Abstract. RDF Schema (RDFS) extends RDF with a schema vocabu-lary with a predefined semantics. Evaluating queries which involve this vocabulary is challenging, and there is not yet consensus in the Seman-tic Web community on how to define a query language for RDFS. In this paper, we introduce a language for querying RDFS data. This lan-guage is obtained by extending SPARQL with nested regular expressions that allow to navigate through an RDF graph with RDFS vocabulary. This language is expressive enough to answer SPARQL queries involving RDFS vocabulary, by directly traversing the input graph. 1