How Good Is Your SPARQL Endpoint?

Ali, Muhammad Intizar; Mileo, Alessandra

doi:10.1007/978-3-662-45563-0_29

Cited by 1 publication

(2 citation statements)

References 21 publications

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“…Buil-Aranda et al [12] suggest various strategies of executing a federated query to obtain complete answer to a query to overcome the size limits of the result returned from a SPARQL endpoint. In order to select an optimised source, Grlitz and Steffen present a system of monitoring SPARQL endpoints and utilising quality of service (QoS) parameters [13]. SPLENDID provides an optimal source selection and efficient query routing for federating endpoints with VoID 7 [14].…”

Section: Related Workmentioning

confidence: 99%

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An adaptive plan-based approach to integrating semantic streams with remote RDF data

Chun

Jung

Seo

et al. 2016

Journal of Information Science

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To satisfy a user’s complex requirements, Resource Description Framework (RDF) Stream Processing (RSP) systems envision the fusion of remote RDF data with semantic streams, using common data models to query semantic streams continuously. While streaming data are changing at a high rate and are pushed into RSP systems, the remote RDF data are retrieved from different remote sources. With the growth of SPARQL endpoints that provide access to remote RDF data, RSP systems can easily integrate the remote data with streams. Such integration provides new opportunities for mixing static (or quasi-static) data with streams on a large scale. However, the current RSP systems do not offer any optimisation for the integration. In this article, we present an adaptive plan-based approach to efficiently integrate sematic streams with the static data from a remote source. We create a query execution plan based on temporal constraints among constituent services for the timely acquisition of remote data. To predict the change of remote sources in real time, we propose an adaptive process of detecting a source update, forecasting the update in the future, deciding a new plan to obtain remote data and reacting to a new plan. We extend a SPARQL query with operators for describing the multiple strategies of the proposed adaptive process. Experimental results show that our approach is more efficient than the conventional RSP systems in distributed settings.

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Section: Related Workmentioning

confidence: 99%

“…The conventional methods suggest diverse optimisation techniques for a federated query with SERVICE clauses [12–16]. However, it is difficult for the existing RSP engines to embrace the existing optimisation techniques.…”

Section: Introductionmentioning

confidence: 99%