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CORR
2011
Springer

An Empirical Study of Real-World SPARQL Queries

11 years 16 days ago
An Empirical Study of Real-World SPARQL Queries
Understanding how users tailor their SPARQL queries is crucial when designing query evaluation engines or fine-tuning RDF stores with performance in mind. In this paper we analyze 3 million real-world SPARQL queries extracted from logs of the DBPedia and SWDF public endpoints. We aim at finding which are the most used language elements both from syntactical and structural perspectives, paying special attention to triple patterns and joins, since they are indeed some of the most expensive SPARQL operations at evaluation phase. We have determined that most of the queries are simple and include few triple patterns and joins, being Subject-Subject, Subject-Object and Object-Object the most common join types. The graph patterns are usually star-shaped and despite triple pattern chains exist, they are generally short. Categories and Subject Descriptors H.2.3 [Database Management]: Languages—Query languages General Terms Languages, Measurement Keywords SPARQL, usage analysis, RDF store, ...
Mario Arias, Javier D. Fernández, Miguel A.
Added 13 May 2011
Updated 13 May 2011
Type Journal
Year 2011
Where CORR
Authors Mario Arias, Javier D. Fernández, Miguel A. Martínez-Prieto, Pablo de la Fuente
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