Finding quality issues in SKOS vocabularies

Authors:
Christian Mader;Bernhard Haslhofer;Antoine Isaac
Affiliations:
Faculty of Computer Science, University of Vienna, Austria;Department of Information Science, Cornell University;Europeana & Vrije Universiteit Amsterdam, The Netherlands
Venue:
TPDL'12 Proceedings of the Second international conference on Theory and Practice of Digital Libraries
Year:
2012

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Abstract

The Simple Knowledge Organization System (SKOS) is a standard model for controlled vocabularies on the Web. However, SKOS vocabularies often differ in terms of quality, which reduces their applicability across system boundaries. Here we investigate how we can support taxonomists in improving SKOS vocabularies by pointing out quality issues that go beyond the integrity constraints defined in the SKOS specification. We identified potential quantifiable quality issues and formalized them into computable quality checking functions that can find affected resources in a given SKOS vocabulary. We implemented these functions in the qSKOS quality assessment tool, analyzed 15 existing vocabularies, and found possible quality issues in all of them.