May 28, 2022

New Conference Paper by Google and Wikimedia Researchers: “From Freebase to Wikidata: The Great Migration”

The following paper will be presented at 25th World Wide Web Conference (April 2016) in Montreal.


From Freebase to Wikidata: The Great Migration


Thomas Pellissier Tanon

Denny Vrandecic

Sebastian Schaffert

Thomas Steiner

Lydia Pintscher


via arXiv
February 2016


Collaborative knowledge bases that make their data freely available in a machine-readable form are central for the data strategy of many projects and organizations. The two ma- jor collaborative knowledge bases are Wikimedia’s Wikidata and Google’s Freebase. Due to the success of Wikidata, Google decided in 2014 to offer the content of Freebase to the Wikidata community.

In this paper, we report on the ongoing transfer efforts and data mapping challenges, and provide an analysis of the effort so far. We describe the Primary Sources Tool, which aims to facilitate this and future data migrations. Throughout the migration, we have gained deep insights into both Wikidata and Freebase, and share and discuss detailed statistics on both knowledge bases

Direct to Full Text Conference Paper (10 pages; PDF)

About Gary Price

Gary Price ( is a librarian, writer, consultant, and frequent conference speaker based in the Washington D.C. metro area. Before launching INFOdocket, Price and Shirl Kennedy were the founders and senior editors at ResourceShelf and DocuTicker for 10 years. From 2006-2009 he was Director of Online Information Services at, and is currently a contributing editor at Search Engine Land.