oclc online computer library center building union catalogs using oclc worldcat matt hartfield,...
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OCLC Online Computer Library Center
Building Union Catalogs Using OCLC WorldCat
Matt Hartfield, Project Manager
Agenda
Models for building a union catalog
Why we chose a centralized model
Benefits of the centralized model
Technological challenges
Results of the OCLC group services pilot project (Mark Flynn, State Library of Florida)
Local OPACs
Simple distributed virtual union catalog model
E
C
D
A
B
User
Virtual catalog
Distributed union catalog model – scalability
User
Virtual catalog
Cataloging tools
Library A
Library B
Library C
Centralized union catalog with OCLC WorldCatSeparate, Physical Union Catalog with WorldCat
A and B B and C
Separate Group Catalogs
Cataloging tools
Library A
Library B
Library C
Centralized union catalog with OCLC WorldCatCentralized Union Catalog with OCLC WorldCat
Libraries Worldwide: 1000
Adventures of Huckleberry FinnMark TwainNew York : Random House 1996
Bibliographic record with associated holdings record
LIBRARY ALIBRARY B LIBRARY C
50 million records
Interoperability with remote databases
Virtual catalogs
Aggregators,Resolution servers
Web, Z39.50, NCIP
Local OPACs
ED
CBA
OpenURL, Z39.50
Web, Z39.50
Library A
Library B
Library C
Library A
Library C
Consortium X
Using WorldCat as basis for consortial union catalog
Group Catalog X
Group Catalog X
Libraries in Group Catalog X: 2
Adventures of Huckleberry FinnMark TwainNew York : Random House 1996
View of WorldCat limited to holdings of consortia
LIBRARY ALIBRARY C
50 million records
Consortium XGroup catalog:10 million records
Consortium YGroup catalog:1 million records
Consortium Z Group catalog:50,000 records
Multiple WorldCat-based group catalogs
Group Catalog X
GroupCatalog YGroup
Catalog Z
Group catalogs function as virtual databases
Virtual catalogs
Aggregators,Resolution servers
Web, Z39.50, NCIP
Local OPACs
ED
CBA
OpenURL, Z39.50
Web, Z39.50
Benefits of Centralized Model
More accurate search results
Multiple indexes supported
Indexing uniform across scopes
Scalability
Search results returned quickly for large groups
Efficiencies of scale
Build it once, less individual configuration necessary
Benefits of Centralized Model
Fast implementation
Builds on what libraries already have in WorldCat
Saves money
Hosted service
Less staff time and technical expertise required
No switching costs
Builds on what libraries already have in WorldCat
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