1. OCLC Research: Selected projects Eric Childress Larry Olszewski Presentation for Dpto. Biblioteconomía y Documentación Universidad Carlos III de Madrid Madrid 29 February 2008

2. Agenda About: OCLC OCLC Research Selected projects: VIAF (Virtual International Authority File) WorldCat Identities DeweyBrowser OCLC WorldMap

3. 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

4. Canada Mexico United States Australia China France Germany Netherlands Switzerland U.K. OCLC Offices

5. OCLC Services

6. 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

7. 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)

8. 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

9. 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

12. 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:

20. 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

24. Some 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

25. OCLC WorldMap: Objectives Geographically represent WorldCat data Holdings by country of publication Published languages Published titles

26. OCLC WorldMap: Objectives Geographically represent data from other sources Number of Libraries Volumes Librarians Registered users Publishers Cultural heritage institutions Dollars spent People

27. OCLC WorldMap

31. 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 Childress Larry Olszewski ©2008 OCLC, Inc.