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dc.contributor.authorRakhmawati, Nur
dc.contributor.authorUmbrich, Jürgen
dc.contributor.authorKarnstedt, Marcel
dc.contributor.authorHasnain, Ali
dc.contributor.authorHausenblas, Michael
dc.identifier.citationNur Rakhmawati and Jürgen Umbrich and Marcel Karnstedt and Ali Hasnain and Michael Hausenblas (2013) Querying over Federated SPARQL Endpoints - A State of the Art Survey. Technical Publicationen_US
dc.descriptionTechnical reporten_US
dc.description.abstractThe increasing amount of Linked Data and its inherent distributed nature have attracted significant attention throughout the research community and amongst practitioners to search data, in the past years. Inspired by research results from traditional distributed databases, different approaches for managing federation over SPARQL Endpoints have been introduced. SPARQL is the standardised query language for RDF, the default data model used in Linked Data deployments and SPARQL Endpoints are a popular access mechanism provided by many Linked Open Data (LOD) repositories. In this paper, we initially give an overview of the federation framework infrastructure and then proceed with a comparison of existing SPARQL federation frameworks. Finally, we highlight shortcomings in existing frameworks, which we hope helps spawning new research directionsen_US
dc.description.sponsorshipScience Foundation Ireland (Lion 2); European Commission FP7 Support Action (LATC), project no. 256975, Intelligent Information Management (ICT-2009.4.3)en_US
dc.subjectLinked Dataen_US
dc.titleQuerying over Federated SPARQL Endpoints - A State of the Art Surveyen_US
dc.typeTechnical Reporten_US
dc.local.contactSyed Muhammad Ali Hasnain, Deri, Ida Business Park, Lower Dangan, Galway. Email:

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