Transcript OCLC Research

OCLC Research:
Selected projects
Presentation for
Dpto. Biblioteconomía y Documentación
Universidad Carlos III de Madrid
Madrid
29 February 2008
Eric Childress
Larry Olszewski
Agenda
• About:
• OCLC
• OCLC Research
• Selected projects:
• VIAF (Virtual International Authority File)
• WorldCat Identities
• DeweyBrowser
• OCLC WorldMap
OCLC
• 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
OCLC Offices
Canada
Mexico
United States
Australia
China
France
Germany
Netherlands
Switzerland
U.K.
OCLC Services
WorldCat
• 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
OCLC 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)
VIAF (Virtual International Authority File)
Primary objectives:
1. Identify the same person or organization in
national authority files
multiple
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
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 coauthors, to subjects)
•
Matches same author with different names
•
Distinguishes same name but different authors
3. Links between matched authority records are generated and
stored
WorldCat 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:
DeweyBrowser
• 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
Some Global Aspects of WorldCat
Content Languages: 473
Materials w/non-US origins:
47% of WC non-English
47.8 million (65%)
Top 5 non-English:
Top 5:
German: 9.8 million
Germany:
8.8 million
French:
UK:
7.3 million
Spanish: 3.3 million
France:
3.6 million
Dutch:
Netherlands:
2.7 million
Canada:
2.6 million
5.4 million
2.5 million
Chinese: 2.0 million
Non-English Metadata Language:
16.5 million (36 languages)
Top 5:
German: 5.4 million
Dutch:
French:
Finnish: 0.7 million
1.7 million
Japanese: 0.7 million
4.9 million
OCLC WorldMap: Objectives
Geographically represent WorldCat data
• Holdings by country of publication
• Published languages
• Published titles
OCLC WorldMap: Objectives
Geographically represent data from other sources
• Number of
• Libraries
• Volumes
• Librarians
• Registered users
• Publishers
• Cultural heritage institutions
• Dollars spent
• People
OCLC WorldMap
OCLC WorldMap
OCLC WorldMap
OCLC WorldMap
Questions?
Eric Childress
Larry Olszewski
• 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
©2008 OCLC, Inc.