New data and visualizations available on MARC Usage in WorldCat site

OCLC Research is studying utilization rates of MARC tags and subfields in WorldCat and producing tools and reports to ultimately inform decisions about where we go from here with the data that has been encoded using the MARC standard. The MARC Usage in WorldCat website has been updated with October 2013 reports and with two new data visualizations. One visualization depicts every field by format and then by tag in a zoomable starburst diagram, and the other depicts every field first by tag and then by format in a zoomable starburst. Actual numbers can be seen while hovering over the tag.

If you wish to see a report on a particular subfield, please contact Senior Program Officer Roy Tennant. For more information about this project, see the MARC Usage in WorldCat activity page.

For more information:

Roy Tennant
Senior Program Officer
OCLC Research

Melissa Renspie
Senior Communications Officer
OCLC Research


Quick links:

MARC Usage in WorldCat website [link]

Data visualization of every field by format [link]

Data visualization of every field by tag [link]

MARC Usage in WorldCat project overview [link]

Roy Tennant [link]


We are a worldwide library cooperative, owned, governed and sustained by members since 1967. Our public purpose is a statement of commitment to each other—that we will work together to improve access to the information held in libraries around the globe, and find ways to reduce costs for libraries through collaboration.