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Towards a Unified Language for RDF Stream Query Processing

  • Daniele Dell’Aglio
  • Jean-Paul Calbimonte
  • Emanuele Della Valle
  • Oscar Corcho
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9341)

Abstract

In recent years, several RDF Stream Processing (RSP) systems have emerged, which allow querying RDF streams using extensions of SPARQL that include operators to take into account the velocity of this data. These systems are heterogeneous in terms of syntax, capabilities and evaluation semantics. Recently, the W3C RSP Group started to work on a common model for representing and querying RDF streams. The emergence of such a model and its accompanying query language is expected to take the most representative, significant and important features of previous efforts, but will also require a careful design and definition of its semantics. In this work, we present a proposal for the query semantics of the W3C RSP query language, and we discuss how it can capture the semantics of existing engines (CQELS, C-SPARQL, SPARQL\(_{stream}\)), explaining and motivating their differences. Then, we use RSP-QL to analyze the current version of the W3C RSP Query Language proposal.

Notes

Acknowledgments

This research is partially supported by the IBM Ph.D. Fellowship Award 2014 granted to D. Dell’Aglio.

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© Springer International Publishing Switzerland 2015

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Authors and Affiliations

  1. 1.DEIB, Politecnico of MilanoMilanoItaly
  2. 2.EPFLLausanneSwitzerland
  3. 3.Ontology Engineering GroupUniversidad Politécnica de MadridMadridSpain

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