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
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
Multiple Manifestations
Subscriptions to Electronic Resources
“Virtual Collections” American Memory LC Online Exhibits Etc.
Hot link
Inquery
Collection level record with hot link
Item level record
Online exhibit multiple LC collections
Selected Web Sites
Web Preservation - Archive
Title MINERVA Mapping the Internet Electronic Resources Virtual Archive Web Preservation at the Library of Congress
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
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
Minerva screen shot
Election 2000: an Internet Library
September 11 Web Archive
Dublin Core and AACR/MARC CORC
Dublin Core OCLC CORC
Digitization of Originals High use materials Preservation Digital delivery of ILL
For preservation
For Brittle book preservation
For ILL
Link back to OPAC
Linked Digital Tables of Contents Flat files Searchable on Internet (Web browsers) Links in OPAC
Links to and from Finding Aids and Reference Lists
Table of Contents
Sources Cited
Index
Thomas Jefferson : An American Man for All Seasons
Links to dynamic catalog searches
Internal Viewers Luna LizardTech QuickTime VMPEG Real MediaPlayer Real Audio Docuview MrSID
LUNA
LizardTech
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
Future OPAC Icons
Prototype
Thank you!