Demo – Paper 466

COOL-WD: A Completeness Tool for Wikidata

Fariz Darari, Radityo Eko Prasojo, Simon Razniewski and Werner Nutt


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Wikidata as a collaborative Semantic Web data source has enjoyed increasing prominence, storing over 150 mio facts about more than 26 mio entities. Yet missing is a way to assess its completeness. In this demo we present COOL-WD, a tool for supporting the completeness lifecycle of Wikidata, that is, the creation, view, update, and consumption of metadata about Wikidata completeness. COOL-WD is available at and has so far collected more than 10,000 completeness statements.

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