An Empirical Study of Real-World SPARQL Queries
Abstract
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.
Keywords
Cite
@article{arxiv.1103.5043,
title = {An Empirical Study of Real-World SPARQL Queries},
author = {Mario Arias and Javier D. Fernández and Miguel A. Martínez-Prieto and Pablo de la Fuente},
journal= {arXiv preprint arXiv:1103.5043},
year = {2011}
}
Comments
1st International Workshop on Usage Analysis and the Web of Data (USEWOD2011) in the 20th International World Wide Web Conference (WWW2011), Hyderabad, India, March 28th, 2011