An Exploratory Analysis of Subject Metadata in the Digital Public Library of America Dublin Core International Conference Wednesday, September 2, 2015.

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Presentation transcript:

An Exploratory Analysis of Subject Metadata in the Digital Public Library of America Dublin Core International Conference Wednesday, September 2, 2015 São Paulo, Brazil

DPLA Content Hubs

ARTstor Biodiversity Heritage Library David Rumsey Harvard Library HathiTrust Internet Archive J. Paul Getty Trust National Archives and Records Administration Smithsonian Institute New York Public Library United States Government Publishing Office University of Illinois at Urbana-Champaign University of Southern California Libraries University of Virginia Library

Hub DPLA Hub Service Hubs

Digital Commonwealth Digital Library of Georgia Kentucky Digital Library Minnesota Digital Library Missouri Hub Mountain West Digital Library North Carolina Digital Heritage Center South Carolina Digital Library The Portal to Texas History

February 2015: 23 hubs 8,012,390 metadata records

Number of Records/Items

Why subjects?

Average Number of Subjects Per Record

Maximum Number of Subjects in Any Record

Total Number of Records and Subjects by Hub Type

Number of Records with No Subjects

Percentage of a Hub’s Records Containing Zero Subjects

Number of Total Subjects and Unique Subjects

Number of Hubs Sharing Unique Subjects Number of Unique Subjects

Number of Hubs Sharing Unique Subjects

African Americans Children Animals Architecture Transportation Horses Education

So what?

Questions? Hannah Tarver Mark Phillips Oksana Zavalina Priya Kizhakkethil