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Querying and Searching Heterogeneous Knowledge Graphs in Real-time Linked Dataspaces

  • André Freitas
  • Seán O’Riáin
  • Edward CurryEmail author
Open Access
Chapter
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Abstract

As the volume and variety of data sources within a dataspace grow, it becomes a semantically heterogeneous and distributed environment; this presents a significant challenge to querying the dataspace. Approaches used for querying siloed databases fail within large dataspaces because users do not have an a priori understanding of all the available datasets. This chapter investigates the main challenges in constructing query and search services for knowledge graphs within a linked dataspace. Search and query services within a linked dataspace do not follow a one-size-fits-all approach and utilise a range of different techniques to support different characteristics of data sources and user needs.

Keywords

Knowledge graphs Query processing Data search Best-effort Dataspace 

Copyright information

© The Author(s) 2020

Open Access This chapter is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

The images or other third party material in this chapter are included in the chapter's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the chapter's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

Authors and Affiliations

  • André Freitas
    • 1
  • Seán O’Riáin
    • 1
  • Edward Curry
    • 2
    Email author
  1. 1.Insight Centre for Data AnalyticsNational University of Ireland GalwayGalwayIreland
  2. 2.National University of Ireland GalwayGalwayIreland

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