Maintaining a Linked Data Cloud and Data Service for Second World War History

  • Mikko KohoEmail author
  • Esko Ikkala
  • Erkki Heino
  • Eero Hyvönen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11196)


One of the great promises of Linked Data is to provide a shared data infrastructure into which new data can be imported and aligned with, forming a sustainable, ever growing Linked Data Cloud (LDC). This paper studies and evaluates this idea in the context of the WarSampo LDC that provides a data infrastructure for Second World War related ontologies and data in Finland, including several mutually linked graphs, totaling ca 12 million triples. Two data integration case studies are presented, where the original WarSampo LDC and the related semantic portal were first extended by a dataset of hundreds of war cemeteries and thousands of photographs of them, and then by another dataset of over 4450 Finnish prisoners of war. As a conclusion, lessons learned are explicated, based on hands-on experience in maintaining the WarSampo LDC in a production environment.



Our work was funded by the Association for Cherishing the Memory of the Dead of the War, the Memory Foundation for the Fallen, the Finnish Ministry of Education and Culture, and the Academy of Finland. The authors wish to acknowledge CSC - IT Center for Science, Finland, for computational resources.


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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Semantic Computing Research Group (SeCo)Aalto UniversityEspooFinland
  2. 2.HELDIG – Helsinki Centre for Digital HumanitiesUniversity of HelsinkiHelsinkiFinland

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