May 25, 2022

A New Film By OCLC’s Roy Tennant: “Cataloging Unchained”

Here’s a new and superbly produced short film/video (embedded below) written, produced, and directed by OCLC Senior Program Officer, Roy Tennant.

It was presented yesterday top open his keynote address at the OCLC Europe, Middle East and Africa Regional Council (EMEARC) Annual Meeting in Strasbourg, France. It’s a lot of fun.


With nearly 300 million bibliographic records, WorldCat is the largest aggregation of shared library data in the world. With access to this data on a large parallel processing computer cluster, OCLC Research has undertaken a number of projects to maximize its value by processing the data in interesting ways to create new services. Work is also being done to report back to the library profession on how the MARC standard has been used over the last 40 years. OCLC Research Senior Program Officer Roy Tennant kicked off his keynote presentation with this “Cataloging Unchained” video and went on to describe some of these efforts as an illustration of the power of mining shared library data.

The video includes a few comments from the VP of Research at OCLC, Lorcan Dempsey.

Kudos to Roy on this production. Nicely done.

See Also: OCLC Research to Study MARC Tag Usage in WorldCat to Determine Best Use of Data Encoded Using MARC Standard
Includes links to mine some of the data.

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.