Lydia Pintscher is the product manager of Wikidata. She studied computer science at the University of Karlsruhe before joining Wikimedia in 2012. She is a long-time free software contributor, most notably as a member of the board of KDE e.V.

Wikidata provides general-purpose data about the world to everyone about nearly 100 Million concepts to date. Our data is used widely in the Wikimedia projects and beyond. With this wide use come growing expectations and responsibility. We'll take a look at what data quality on Wikidata even means, why it matters and what tools we have to improve it.

You will understand what different aspects to data quality on Wikidata there are and which problems we have. You will learn how to measure data quality on Wikidata and what tools and processes exist to improve it.

These are the links mentioned during the presentation:

• Constraint Violation Checker
• Item Quality Evaluator
• Wikidata Query Service
• d:Wikidata:Listeria
• CuriousFacts
• Query Builder (released 17 Aug 2021--today!)
• Mismatch Finder