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OCLC Research:Selected projectsOCLC Research:Selected projects
Eric ChildressLarry Olszewski
Presentation forDpto. Biblioteconomía y Documentación Universidad Carlos III de MadridMadrid29 February 2008
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AgendaAgenda
• About:
• OCLC
• OCLC Research
• Selected projects:
• VIAF (Virtual International Authority File)
• WorldCat Identities
• DeweyBrowser
• OCLC WorldMap
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OCLCOCLC
• Founded 1967 in Ohio, U.S.A.
• Non-profit
• Dedicated to public purposes:
• Reduce the rate of rise of library costs
• Further access to information
• World’s largest library cooperative
• 60,000 libraries
• 112 countries
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CanadaMexicoUnited States
AustraliaChina
FranceGermany
Netherlands
SwitzerlandU.K.
OCLC OfficesOCLC Offices
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OCLC ServicesOCLC Services
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WorldCatWorldCat
• Number of bibliographic records:
• 98,765,513
• How often a record is added:
• Every 10 seconds
• Number of holdings:
• 1,219,355,469
• Number of countries represented:
• 112 countries and territories around the world
• Number of languages and dialects represented:
• More than 470
• How often a request is filled through WorldCat Resource Sharing:
• Every 4 seconds
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OCLC ResearchOCLC Research
• A leading research center devoted to supporting OCLC’s public mission on behalf of libraries, archives and museums
• Scientists, programmers, other staff work to explore issues, try new techniques, explore new technology, prototype new services.
• OCLC Research has been instrumental in the development of:
• PURLs (Persistent URLs)
• Dublin Core
• OAI (Open Archives Initiative)
• SRU/W (Search & Retreive)
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VIAF (Virtual International Authority File)VIAF (Virtual International Authority File)
Primary objectives:
1. Identify the same person or organization in multiple national authority files
2. Link the corresponding authority records
Value:
• Potentially lowers the cost of authority work
• Multiple authorized forms may co-exist
• Better data-mining (including FRBR) and searching
• VIAF will made available on the Web for wide use by libraries, search engines, others
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VIAF (cont.)VIAF (cont.)
How VIAF works:
1. National libraries supply OCLC with national bibliographic files and authority files
2. OCLC-developed software:
• Identifies key relationships (e.g., author name to works, to co-authors, to subjects)
• Matches same author with different names
• Distinguishes same name but different authors
3. Links between matched authority records are generated and stored
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WorldCat IdentitiesWorldCat Identities
• Using data mining techniques OCLC builds a summary page for persons and corporate bodies referenced in WorldCat bibliographic records (25 million+)
• Data is derived from bibliographic data and authority records and holdings in WorldCat
• Special features such as a publication timeline included:
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DeweyBrowserDeweyBrowser
• Interface to 2.5 million WorldCat records with DDC numbers
• Browse by DDC class
• Display captions in English, French, German, Norwegian, Spanish, and Swedish
• Supports facetted browsing:
• Format
• Language
• OCLC audience level
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Some Global Aspects of WorldCatSome Global Aspects of WorldCat
Content Languages: 473
47% of WC non-English
Top 5 non-English:
German: 9.8 million
French: 5.4 million
Spanish: 3.3 million
Dutch: 2.5 million
Chinese: 2.0 million
Content Languages: 473
47% of WC non-English
Top 5 non-English:
German: 9.8 million
French: 5.4 million
Spanish: 3.3 million
Dutch: 2.5 million
Chinese: 2.0 million
Non-English Metadata Language:
16.5 million (36 languages)
Top 5:
German: 5.4 million Dutch: 4.9 million
French: 1.7 million Finnish: 0.7 million
Japanese: 0.7 million
Non-English Metadata Language:
16.5 million (36 languages)
Top 5:
German: 5.4 million Dutch: 4.9 million
French: 1.7 million Finnish: 0.7 million
Japanese: 0.7 million
Materials w/non-US origins:
47.8 million (65%)
Top 5:
Germany: 8.8 million
UK: 7.3 million
France: 3.6 million
Netherlands: 2.7 million
Canada: 2.6 million
Materials w/non-US origins:
47.8 million (65%)
Top 5:
Germany: 8.8 million
UK: 7.3 million
France: 3.6 million
Netherlands: 2.7 million
Canada: 2.6 million
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OCLC WorldMap: ObjectivesOCLC WorldMap: Objectives
Geographically represent WorldCat data
•Holdings by country of publication
•Published languages
•Published titles
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OCLC WorldMap: ObjectivesOCLC WorldMap: Objectives
Geographically represent data from other sources
• Number of
• Libraries
• Volumes
• Librarians
• Registered users
• Publishers
• Cultural heritage institutions
• Dollars spent
• People
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OCLC WorldMapOCLC WorldMap
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OCLC WorldMapOCLC WorldMap
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OCLC WorldMapOCLC WorldMap
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OCLC WorldMapOCLC WorldMap
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Questions?Questions?
• VIAF
• http://www.oclc.org/research/projects/viaf/
• WorldCat Identities
• http://orlabs.oclc.org/Identities/
• DeweyBrowser
• http://deweybrowser.oclc.org/ddcbrowser2/index_spa.html
• OCLC WorldMap
• http://www.oclc.org/research/projects/worldmap
Eric ChildressLarry Olszewski
©2008 OCLC, Inc.