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SemLAV: Local-As-View Mediation for SPARQL Queries
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BibTeX
@MISC{Montoya_semlav:local-as-view,
author = {Gabriela Montoya and Hala Skaf-molli and Pascal Molli and Maria-esther Vidal},
title = {SemLAV: Local-As-View Mediation for SPARQL Queries},
year = {}
}
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Abstract
Abstract. The Local-As-View (LAV) integration approach aims at query-ing heterogeneous data in dynamic environments. In LAV, data sources are described as views over a global schema which is used to pose queries. Query processing requires to generate and execute query rewritings, but for SPARQL queries, the LAV query rewritings may not be generated or executed in a reasonable time. In this paper, we present SemLAV, an alternative technique to pro-cess SPARQL queries over a LAV integration system without generating rewritings. SemLAV executes the query against a partial instance of the global schema which is built on-the-fly with data from the relevant views. The paper presents an experimental study for SemLAV, and compares its performance with traditional LAV-based query processing techniques. The results suggest that SemLAV scales up to SPARQL queries even over a large number of views, while it significantly outperforms traditional so-lutions.
Keyphrases
sparql query local-as-view mediation global schema lav integration system query rewriting lav query rewriting data source pro-cess sparql query query-ing heterogeneous data experimental study alternative technique integration approach reasonable time partial instance traditional lav-based query processing technique large number query processing dynamic environment traditional so-lutions relevant view
