2019:Research/Discovering Implicational Knowledge in Wikidata
 | This is an Accepted submission for the Research space at Wikimania 2019. |
Abstract
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The ever-growing Wikidata contains a vast amount of factual knowledge. More complex knowledge, however, lies hidden beneath the surface: it can only be discovered by combining the factual statements of multiple items. Some of this knowledge may not even be stated explicitly, but rather hold simply by virtue of having no counterexamples present on Wikidata. Such implicit knowledge is not readily discoverable by humans, as the sheer size of Wikidata makes it impossible to verify the absence of counterexamples. We set out to identify a form of implicit knowledge that is succinctly representable, yet still comprehensible to humans: implications between properties of some set of items. Using techniques from Formal Concept Analysis, we show how to compute such implications, which can then be used to enhance the quality of Wikidata itself: absence of an expected rule points to counterexamples in the data set; unexpected rules indicate incomplete data. We propose an interactive exploration process that guides editors to identify false counterexamples and provide missing data. (preliminary report)
Authors
editMaximilian Marx (TU Dresden), Tom Hanika (University of Kassel), Gerd Stumme (University of Kassel)
Session type
edit22-min presentation.
Participants [subscribe here!]
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