Digital Libraries

1. Digital Libraries

2. SynchronousScholarly Communication Same time, Same or different place

3. Asynchronous, Digital Library Mediated Scholarly Communication Different time and/or place

4. Digital LibrariesShorten the Chain from Author Editor Reviewer Publisher A&I Library Reader

5. DLs Shorten the Chain to Roles Digital Library Author Teacher User Reader Editor Learner Reviewer Librarian

6. DL OverviewWhy of Global Interest? • National projects can preserve antiquities and heritage: cultural, historical, linguistic, scholarly • Knowledge and information are essential to economic and technological growth, education • DL - a domain for international collaboration • wherein all can contribute and benefit • which leverages investment in networking • which provides useful content on Internet & WWW • which will tie nations and peoples together more strongly and through deeper understanding

7. Digital Libraries --- Objectives • World Lit.: 24hr / 7day / from desktop • Integrated “super” information systems: 5S: Table of related areas and their coverage • Ubiquitous, Higher Quality, Lower Cost • Education, Knowledge Sharing, Discovery • Disintermediation -> Collaboration • Universities Reclaim Property • Interactive Courseware, Student Works • Scalable, Sustainable, Usable, Useful

8. How is a DL different from a database? • A traditional SQL database has as its basic element data items in a relation: • select name • from employee, project • where employee.deptnumber = “25” AND • project.number = “100” • databases exploit known structures and relations • DBMS retrieval is not probabilistic (Frakes, Baeza-Yates, p. 3)

9. How is a DL different from the WWW? • The keyword is managed • The WWW is not managed • Some meta searchers (Yahoo, Lycos) attempt to add an organizational framework to their web holdings • However, most are focused on keyword searching (i.e., Google)

10. How is a DL different from the WWW? • Another key difference is who controls the input into the system • most meta searchers hunt down their holdings • Lycos is short for Lycosidae lycosa (the “wolf spider”), which pursues its prey and does not build a web (Mauldin, IEEE Expert, 1/97) • some (Yahoo) have humans in the loop for review and classification • To date, DLs are generally more tightly controlled, and have a targeted customer set

11. DL = Content + Services • “Why not just use the WWW” ? • WWW by itself has low archival & management characteristics • “Why not use a RDBMS?” • In the same way that a card catalog is not a TL, a RDBMS is candidate technology for use in DLs • DL is the union of the content and services defined on the content

12. How is a DL Different from a Traditional Library? • TL has as its focus physical objects • even if the card catalog (metadata) is electronic, the purpose is to point you to a physical location • trafficking in physical objects has both obvious and subtle implications • object can exist only in 1 place • if you have it, I can’t have it (zero-sum distribution) • I have to go to the object, or wait for it to come to me

13. TLs vs. DLs • DLs clearly better than TLs at: • Dissemination, storing information variety • However, TL objects are more survivable • Who will archive the research information? • the publishers? • the institutions? • the authors? • Will the average DL object still be accessible in 10 years? • take my digital preservation seminar in the spring! image from: http://www.ancientegypt.co.uk/writing/rosetta.html

14. How is a DL Different from a Traditional Library? • Digital Library • removing the physical restriction has obvious benefits • multiple access, multiple listings, electronic transmission • also complicates many other issues... • intellectual property, terms and conditions, etc. • Note that a TL offers additional social and educational benefits • Most TLs also offer hybrid services too.

15. from Lesk, http://community.bellcore.com/lesk/columbia/session1/

16. TLs vs. DLs • Where does publishing stop, and libraries begin? • there has always been tensions between TLs and traditional publishers, but the roles were fairly well defined • DLs can muddle the separation of these responsibilities • result: conflict, and/or new models

17. DL Definitions - 1 • “A digital library is an organized and focused collection of digital objects, including text, images, video, and audio, along with methods of access and retrieval, and for selection, creation, organization, maintenance, and sharing of the collection.” • Witten & Bainbridge – “How to Build a Digital Library” – Morgan Kaufmann 2003

18. DL Definitions - 2 • “Digital libraries are organizations that provide the resources, including the specialized staff, to select, structure, offer intellectual access to, interpret, distribute, preserve the integrity of, and ensure the persistence over time of collections of digital works so that they are readily and economically available for use by a defined community or set of communities” • Waters,D.J. CLIR Issues, July/August 1998 • www.clir.org/pubs/issues/issues04.html

19. Informal 5S & DL DefinitionsDLs are complex systems that • help satisfy info needs of users (societies) • provide info services (scenarios) • organize info in usable ways (structures) • present info in usable ways (spaces) • communicate info with users (streams)

20. 5Ss

23. ETANA-DL • Archaeological DL • Integrated DL • Heterogeneous data handling • Applies and extends the OAI-PMH • Open Archives Initiative Protocol for Metadata Handling • Design considerations • Componentized • Extensible • Portable

24. Initial ETANA-DL Member Locations Canadian University College Andrews University CWRU Walla Walla College Willamette University Virginia Tech Vanderbilt University Mississippi State University Map courtesy: www.enchantedlearning.com

27. Lahav Website

28. Megiddo Opening Screen

29. Locus Screen: Pictures View all

30. Area Screen

32. ETANA-DL Approach • Applying and extending Digital Library (DL) techniques to solve key problems: making primary data available, data preservation, and interoperability • Modeling archaeological information systems using 5S to better understand the domain and design the system and the supporting services • Rapidly prototyping DLs that handle heterogeneous archaeological data using componentized frameworks: • eliciting requirements • refining metamodel and union schema • modeling sites • mapping • harvesting • providing useful services

33. ETANA-DL Website

34. Marking – writing notes for a specific user Marking Items

35. Sender, Date, Object OAI ID Sender Comments Options: View Record, Add record to Items Of Interest, Re-mark item (Redirect), Unmark item (Remove item from list) Marked Items Display

36. Discussions about an object View/Post messages, create new threads Discussions Page

37. Items recommended on the basis of similar interests Recommendations

38. ETANA-DL Searching Service Search

39. ETANA-DL Multi-dimensional Browsing 3 new sites 2 new types of artifacts

40. ETANA-DL Visual Browsing Service Visual Browse By site

41. Visual Browsing Nimrin: Topographical Drawings Square: N40/W20 Full site North westquadrant

42. Visual Browsing Nimrin : Square information Square: N40/W20 Locus: 86 Loci layout

43. Visual Browsing Nimrin : locus sheet

44. Visual Browsing Bab edh-Dhra' Cemetery Pottery # 25

45. Visual Browsing Bab edh-Dhra' Cemetery Pottery # 25