eprintid: 1454
rev_number: 8
eprint_status: archive
userid: 43
dir: disk0/00/00/14/54
datestamp: 2012-12-19 10:57:28
lastmod: 2013-03-12 14:57:00
status_changed: 2012-12-19 10:57:28
type: book_section
metadata_visibility: show
creators_name: Campinas, Stephane
creators_name: Perry, Thomas E.
creators_name: Ceccarelli, Diego
creators_name: Delbru, Renaud
creators_name: Tummarello, Giovanni
creators_id: 
creators_id: 
creators_id: diego.ceccarelli@imtlucca.it
creators_id: 
creators_id: 
title: Introducing RDF Graph Summary with Application to Assisted SPARQL Formulation
ispublished: pub
subjects: QA75
divisions: CSA
full_text_status: none
keywords: RDF graph summary; SPARQL query; Sindice data collection; assisted SPARQL formulation; data diversity; data graph; interactive query formulation; structural query element; query formulation; query languages;
abstract: One of the reasons for the slow adoption of SPARQL is the complexity in query formulation due to data diversity. The principal barrier a user faces when trying to formulate a query is that he generally has no information about the underlying structure and vocabulary of the data. In this paper, we address this problem at the maximum scale we can think of: providing assistance in formulating SPARQL queries over the entire Sindice data collection - 15 billion triples and counting coming from more than 300K datasets. We present a method to help users in formulating complex SPARQL queries across multiple heterogeneous data sources. Even if the structure and vocabulary of the data sources are unknown to the user, the user is able to quickly and easily formulate his queries. Our method is based on a summary of the data graph and assists the user during an interactive query formulation by recommending possible structural query elements.
date: 2012-09
date_type: published
publisher: IEEE
pagerange: 261 -266
event_title: Database and Expert Systems Applications (DEXA), 2012 23rd International Workshop on
id_number: 10.1109/DEXA.2012.38
refereed: TRUE
isbn: 978-1-4673-2621-6
book_title: Proceeding of the 23rd International Workshop on Database and Expert Systems Applications (DEXA)
official_url: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6327436&isnumber=6327394
citation:   Campinas, Stephane and Perry, Thomas E. and Ceccarelli, Diego and Delbru, Renaud and Tummarello, Giovanni  Introducing RDF Graph Summary with Application to Assisted SPARQL Formulation.   In:  Proceeding of the 23rd International Workshop on Database and Expert Systems Applications (DEXA).   IEEE, 261 -266.  ISBN 978-1-4673-2621-6      (2012)