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Ruben Verborgh

Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets

by Pieter Heyvaert, Pieter Colpaert, Ruben Verborgh, Erik Mannens, and Rik Van de Walle

Data Catalog Vocabulary (DCAT) is a W3C specification to describe datasets published on the Web. However, these catalogs are not easily discoverable based on a user’s needs. In this paper, we introduce the Node.js module "dcat-merger" which allows a user agent to download and semantically merge different DCAT feeds from the Web into one DCAT feed, which can be republished. Merging the input feeds is followed by enriching them. Besides determining the subjects of the datasets, using DBpedia Spotlight, two extensions were built: one categorizes the datasets according to a taxonomy, and the other adds spatial properties to the datasets. These extensions require the use of information available in DBpedia’s SPARQL endpoint. However, public SPARQL endpoints often suffer from low availability, so a Triple Pattern Fragments alternative is used. However, the need for DCAT Merger sparks the discussion for more high level functionality to improve a catalog’s discoverability.

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Published in 2015 in Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos.

Keywords: DBpedia, Triple Pattern Fragments, SPARQL, Web

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IEEE
P. Heyvaert, P. Colpaert, R. Verborgh, E. Mannens, and R. Van de Walle, “Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets,” in Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos, 2015, vol. 9341, pp. 67–71.
ACM
Pieter Heyvaert, Pieter Colpaert, Ruben Verborgh, Erik Mannens, and Rik Van de Walle. 2015. Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets. In Fabien Gandon, Christophe Guéret, Serena Villata, John Breslin, Catherine Faron-Zucker, & Antoine Zimmermann, eds. Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos. Lecture Notes in Computer Science. Springer, 67–71.
LNCS
Heyvaert, P., Colpaert, P., Verborgh, R., Mannens, E., Van de Walle, R.: Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets. In: Gandon, F., Guéret, C., Villata, S., Breslin, J., Faron-Zucker, C., and Zimmermann, A. (eds.) Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos. pp. 67–71. Springer (2015).
APA
Heyvaert, P., Colpaert, P., Verborgh, R., Mannens, E., & Van de Walle, R. (2015). Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets. In F. Gandon, C. Guéret, S. Villata, J. Breslin, C. Faron-Zucker, & A. Zimmermann (Eds.), Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos (Vol. 9341, pp. 67–71). Springer.
MLA
Heyvaert, Pieter et al. “Merging and Enriching DCAT Feeds to Improve Discoverability of Datasets.” Proceedings of the 12th Extended Semantic Web Conference: Posters and Demos. Ed. Fabien Gandon et al. Vol. 9341. Springer, 2015. 67–71. Print. Lecture Notes in Computer Science.

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