Strategies for executing federated queries in SPARQL1.1

Buil-Aranda, Carlos and Polleres, Axel ORCID: and Umbrich, Jürgen (2014) Strategies for executing federated queries in SPARQL1.1. In: The Semantic Web - ISWC 2014. Lecture Notes in Computer Science book series (LNCS, volume 8797), Springer International Publishing AG , Cham. 390 -405. ISBN 978-3-319-11915-1


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A common way for exposing RDF data on the Web is by means of SPARQL endpoints which allow end users and applications to query just the RDF data they want. However, servers hosting SPARQL endpoints often restrict access to the data by limiting the amount of results returned per query or the amount of queries per time that a client may issue. As this may affect query completeness when using SPARQL1.1's federated query extension, we analysed different strategies to implement federated queries with the goal to circumvent endpoint limits. We show that some seemingly intuitive methods for decomposing federated queries provide unsound results in the general case, and provide fixes or discuss under which restrictions these recipes are still applicable. Finally, we evaluate the proposed strategies for checking their feasibility in practice.

Item Type: Book Section
Additional Information: Supported by the Millennium Nucleus Center for Semantic Web Research under Grant NC120004 and CONICYT/FONDECYT project 3130617 and by the Vienna Science and Technology Fund (WWTF) project ICT12-015. To see the final version of this paper please visit the publisher's website. Access to the published version requires a subscription.
Divisions: Departments > Informationsverarbeitung u Prozessmanag. > Informationswirtschaft > Polleres
Version of the Document: Accepted for Publication
Depositing User: ePub Administrator
Date Deposited: 12 Oct 2017 10:52
Last Modified: 24 Oct 2019 13:30
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