Querying Heterogeneous Datasets on the Linked Data Web: Challenges, Approaches, and Trends

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The growing number of datasets published on the Web as linked data brings both opportunities for high data availability and challenges inherent to querying data in a semantically heterogeneous and distributed environment. Approaches used for querying siloed databases fail at Web-scale because users don't have an a priori understanding of all the available datasets. This article investigates the main challenges in constructing a query and search solution for linked data and analyzes existing approaches and trends.

Full article: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6051410&tag=1

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Querying Heterogeneous Datasets on the Linked Data Web: Challenges, Approaches, and Trends

  1. 1. Digital Enterprise Research Institute www.deri.ie Querying Heterogeneous Datasets on the Linked Data Web: Challenges, Approaches, and Trends André Freitas, Edward Curry, João G. Oliveira, Seán O’Riain Copyright 2009 Digital Enterprise Research Institute. All rights reserved.
  2. 2. IEEE Internet ComputingDigital Enterprise Research Institute www.deri.ie
  3. 3. Digital Enterprise Research Institute www.deri.ie http://ieeexplore.ieee.org/xpls/abs_all.js p?arnumber= 6051410&tag= 1
  4. 4. Digital Enterprise Research Institute www.deri.ie Challenges
  5. 5. Current Scenario/Ideal ScenarioDigital Enterprise Research Institute www.deri.ie
  6. 6. Expressivity- usability trade- offDigital Enterprise Research Institute www.deri.ie
  7. 7. ChallengesDigital Enterprise Research Institute www.deri.ie  This analysis focuses on the investigation of existing approaches under the perspective of the usability-expressivity trade-off.  This focus guides the categorization and analysis of existing challenges, approaches and trends.
  8. 8. Challenge DimensionsDigital Enterprise Research Institute www.deri.ie  Query expressivity  Usability  Vocabulary-level semantic matching  Entity Reconciliation  Semantic Tractability mechanisms
  9. 9. Digital Enterprise Research Institute www.deri.ie Approaches
  10. 10. ApproachesDigital Enterprise Research Institute www.deri.ie  Information Retrieval approaches  Entity-centric search  Structure search  Natural Language approaches  Question Answering  Semantic best-effort natural language interfaces
  11. 11. Entity- Centric SearchDigital Enterprise Research Institute www.deri.ie e.g. Sindice
  12. 12. Structure SearchDigital Enterprise Research Institute www.deri.ie e.g. Semplore
  13. 13. Question AnsweringDigital Enterprise Research Institute www.deri.ie e.g. FreyA
  14. 14. Semantic Best- Effort/NLDigital Enterprise Research Institute www.deri.ie e.g. Treo
  15. 15. Comparative Analysis (Approaches)Digital Enterprise Research Institute www.deri.ie
  16. 16. Digital Enterprise Research Institute www.deri.ie Trends
  17. 17. Addressing the ChallengesDigital Enterprise Research Institute www.deri.ie  The functionality analysis of existing approaches provides insights on how the major challenges should be addressed.  This set of strategic functionalities define the set of trends.
  18. 18. Linked Data WebDigital Enterprise Research Institute www.deri.ie
  19. 19. TrendsDigital Enterprise Research Institute www.deri.ie  Complementary Search and Query Services  User Interaction and Feedback Mechanisms  Semantic Best-Effort Query Model  Natural Language Processing Techniques  Distributional Semantic Model  External Knowledge Sources for Semantic Enrichment  Integrated Entity Reconciliation Techniques
  20. 20. IEEE Internet ComputingDigital Enterprise Research Institute www.deri.ie
  21. 21. Digital Enterprise Research Institute www.deri.ie http://ieeexplore.ieee.org/xpls/abs_all.js p?arnumber= 6051410&tag= 1
  22. 22. Digital Enterprise Research Institute www.deri.ie http://andrefreitas.org

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