1. Authority Addicts: The New Frontier of Authority Control on Wikidata

2. Virtual International Authority File ● A merged super authority file ● Algorithmically matching of entities ● First murmurs 1998

3. Virtual International Authority File ● Originally between ● the Library of Congress (LC) ● the Deutsche Nationalbibliothek (DNB) ● the Bibliothèque nationale de France (BNF) ● and OCLC

4. And now including

5. Sample record

6. Also with experimental imports

7. Wikipedia as Authority File ● Provides disambiguation of names ● With unique identifiers (URIs)

8. Wikidata as Super Authority File ● Since it connects many Authority Files – Which are Wikipedias

9. Comparison of Super Authority Files by size

10. Matching VIAF and Wikipedia ● German manual efforts – Matched PND and VIAF and others to de.wiki – ~200,000 matches ● VIAF algorithm – Matched VIAF to en.wiki – ~250,000 matches ● French, Italian, Spanish, Polish and Japanese manual efforts

11. Merged and migrated to Wikidata

12. Disagreements

13. Quality Assurance ● In traditional AC inaccuracies could be reported. – Wait and wait. ● Now, disagreement lead to investigation – And direct resolution on Wikidata – This is a major benefit of Wikidata

14. And can view differences in content

15. Label and Alias Fill by bot in 49 languages

16. The short term implications ● Can synchronize the differences ● Improve the quality of both files ● Improve the completeness of both files

17. Longer term implication ● Coexistence of the two? ● Is it possible or desirable that Wikidata could replace VIAF?