OCLC Collection Analysis: 2006 TRLN Study

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OCLC Collection Analysis2006 TRLN Study

• ASERL Fall Membership Meeting
• Judy Ruttenberg, Project Librarian
• on behalf of the Task Group

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OCLC Collection Analysis2006 TRLN Study

• 26th Annual Charleston Conference
• Judy Ruttenberg, Project Librarian
• on behalf of the Task Group

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• TRLN TASK GROUP MEMBERS
• Diane Strauss, UNC-Chapel Hill, Chair
• Gouri Dutta, North Carolina Central University
• Aisha Harvey, Duke University
• Darby Orcutt, North Carolina State University
• Judy Ruttenberg, TRLN
• Luke Swindler, UNC-Chapel Hill
• Meg Trauner, Duke University
• Phil Vandermeer, UNC-Chapel Hill
• Suzanne Weiner, North Carolina State University

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• PROJECT WEBSITE
• http//www.trln.org/TaskGroups/CollectionAnalysis/
  
• to learn about the overlap, uniqueness and gaps
  in the collections of TRLN libraries, especially
  when viewed as one aggregate collection

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• OUTLINE
• Past overlap studies
• 2006 results
• Data limitations distortions
• Responses to report
• Plans for future analysis

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• TRLN PAST OVERLAP STUDIES
• Building a union catalog, concern over record
  duplication and cost of disk drives

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• TRLN PAST OVERLAP STUDIES
• Maintaining three separate databases, results
  promoted as evidence of cooperation

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• TRLN PAST OVERLAP STUDIES
• Cooperation reaffirmed

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• TRLN PAST OVERLAP STUDIES

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THEN NOW

• 1992
• 2,311,311 records
• Many library titles were not in OCLC
• TRLN Duke, NCSU UNC

• 2006
• 5,158,309 records
• 90 retrospective conversion
• TRLN Duke, NCCU, NCSU UNC

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TRLN collections by institution and share
distribution
Percent of Collection
NCSU DUKE NCCU UNC
TRLN
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OVERLAP IN CORE SUBJECTS
Chemistry Percent Unique by Collection
Mathematics Percent Unique by Collection
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SUBJECT STRENGTHS NCSU
Veterinary Medicine
Manufactures Textile Industries
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SUBJECT STRENGTHS DUKE
Methodism
Foreign International Law
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SUBJECT STRENGTHS UNC
Journalism
Dramatic Arts, Total
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SUBJECT STRENGTHS NCCU
Legal Profession
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FOREIGN LANGUAGE MATERIALS
Books in Chinese
Books in Japanese
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• DATA LIMITATIONS OCLC HOLDINGS
• Government Documents
• Special Collections
• Microforms
• Serials, particularly e-journals

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• DATA LIMITATIONS OCLC HOLDINGS
• Government Documents
• Special Collections
• Microforms
• Serials, particularly e-journals
• Federal documents highly redundant, but
  long-standing cooperative agreements for others

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• DATA LIMITATIONS OCLC HOLDINGS
• Government Documents
• Special Collections
• Microforms
• Serials, particularly e-journals
• Presumed unique

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• DATA LIMITATIONS OCLC HOLDINGS
• Government Documents
• Special Collections
• Microforms
• Serials, particularly e-journals
• Title level distortion vs. purposeful
  duplication, shared access

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• CAMPUS APPLICATIONS
• NCCU Law Library Identified acquired more than
  1,000 new monographs affected rank among
  Southeastern Law Libraries
• NCSU Libraries
• Public History PhD Program
• Unique materials relative to Google 5

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• FUTURE PLANS FOR OCLC-WCA
• Renewed for 2006-2007
• Estimation/measurement of data discrepancies
  through sampling
• Identify unique materials for potential mass
  digitization project