Structural Properties as Proxy for Semantic Relevance in RDF Graph Sampling

  • Laurens Rietveld
  • Rinke Hoekstra
  • Stefan Schlobach
  • Christophe Guéret
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8797)

Abstract

The Linked Data cloud has grown to become the largest knowledge base ever constructed. Its size is now turning into a major bottleneck for many applications. In order to facilitate access to this structured information, this paper proposes an automatic sampling method targeted at maximizing answer coverage for applications using SPARQL querying. The approach presented in this paper is novel: no similar RDF sampling approach exist. Additionally, the concept of creating a sample aimed at maximizing SPARQL answer coverage, is unique. We empirically show that the relevance of triples for sampling (a semantic notion) is influenced by the topology of the graph (purely structural), and can be determined without prior knowledge of the queries. Experiments show a significantly higher recall of topology based sampling methods over random and naive baseline approaches (e.g. up to 90% for Open-BioMed at a sample size of 6%).

Keywords

subgraphs sampling graph analysis ranking Linked Data 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Laurens Rietveld
    • 1
  • Rinke Hoekstra
    • 1
    • 2
  • Stefan Schlobach
    • 1
  • Christophe Guéret
    • 3
  1. 1.Dept. of Computer ScienceVU University AmsterdamThe Netherlands
  2. 2.Leibniz Center for LawUniversity of AmsterdamThe Netherlands
  3. 3.Data Archiving and Network Services (DANS)The Netherlands

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