1. Access to Digital Materials through the Library of Congress OPAC Presentation by Dr. Barbara B. Tillett Chief, Cataloging Policy and Support Office Library of Congress April 8, 2002 Oslo, Norway

2. Contents OPAC links –Multiple manifestations (holdings) Subscriptions to ER –Virtual collections American Memory LC online exhibits –Selected Web sites Web Preservation archive –CORC/Dublin Core & MARC –Digitization of originals High use materials Preservation Digital delivery of ILL –Page turners, “Query” OPAC or Web search –Tables of Contents –Finding Aids/Reference Lists Internal (LC) viewers –Luna –QuickTime, VMPEG, Real MediaPlayer –RealAudio, Docuview, MrSID, LizardTech

3. Multiple Manifestations

8. Subscriptions to Electronic Resources

14. “Virtual Collections” American Memory LC Online Exhibits Etc.

16. Hot link

18. Inquery

19. Collection level record with hot link

21. Item level record

22. Online exhibit multiple LC collections

24. 1490-1920

26. Selected Web Sites

31. Web Preservation - Archive

32. Title MINERVA Mapping the Internet Electronic Resources Virtual Archive Web Preservation at the Library of Congress

33. To design, develop and execute a collecting program at the Library for born digital materials to be a permanent part of the research holdings Multidisciplinary team created to study and evaluate methods of web preservation To collect and preserve open-access materials from the web Project Background and Goals MINERVA – Mapping the Internet Electronic Resources Virtual Archive

34. Web site Archive At selected time intervals additional snapshots are made. Snapshot 1 Snapshot 2 Snapshot 3 A web site is downloaded, using a mirroring program. A snapshot is stored in an archive. Project Description Collect

35. Minerva screen shot

36. http://web.archive.org/collections/e2k.html http://wayback.loc.gov:8081/collections/e2k.html Election 2000: an Internet Library

44. http://september11.archive.org September 11 Web Archive

46. Dublin Core and AACR/MARC CORC

47. Dublin Core OCLC CORC

50. Digitization of Originals High use materials Preservation Digital delivery of ILL

51. For preservation

59. For Brittle book preservation

62. For ILL

65. Link back to OPAC

66. Linked Digital Tables of Contents Flat files Searchable on Internet (Web browsers) Links in OPAC

69. Links to and from Finding Aids and Reference Lists

72. Table of Contents

73. Sources Cited

74. Index

75. Thomas Jefferson : An American Man for All Seasons http://www.loc.gov/rr/main/jefferson/

76. Links to dynamic catalog searches

77. Internal Viewers http://memory.loc.gov/ammem/amviewer.html Luna LizardTech QuickTime VMPEG Real MediaPlayer Real Audio Docuview MrSID

78. LUNA

79. LizardTech

82. Issues Ad hoc projects across LC Consistent policy - MPG Resolving URLs –856 mix of URLs, handles, etc. –Handles Impact on OPAC response time –Z39.50 searches - use limits –Web (external) searches –Internal searches End users’ technology Copyright Timing MARC format changes Staff resources –Keeping up with serial aggregations (high volume, ephemeral) –Bib record quality Communicating the existence of the digital resources

83. Future OPAC Icons

84. Prototype

85. Thank you!