1. 1 Building the NSDL William Y. Arms Cornell University Thinking aloud about the NSDL

2. 2 Acknowledgement and Disclaimer The NSDL is a program of the National Science Foundation's Directorate for Education and Human Resources, Division of Undergraduate Education. The ideas discussed in this talk do not represent the official views of the NSF (or of anybody except the author).

3. 3 What's in a name?

4. 4 SMETE Science, Mathematics, Engineering and Technology Education The NSDL National Digital Library

5. 5 Science? The NSDL National Digital Library Can we build a comprehensive digital library for science education, without building a National Science Digital Library?

6. 6 The National Science Digital Library

7. 7 It's BIG!

8. 8 To be comprehensive—all branches of science, all levels of education, very broadly defined: Five year targets 1,000,000 different users 10,000,000 digital objects 100,000 independent sites How big might the NSDL be?

9. 9 Scientific and technical information in digital form Materials used in education Digital collections for science Materials tailored to education

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15. 15 Opportunities for the NSDL Categories of material that have been given lower priority by libraries and publishers, e.g., datasets, software, and other dynamic content,... Materials that are accessible for automatic processing, e.g., scientific web sites and databases, image collections,... Materials designed for education, e.g.,learning objects, curricula, problem sets,... Less opportunity for the NSDL Conventional scientific literature with restricted access

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17. 17 The NSF's strategy

18. 18 The NSF cannot fund all collections

19. 19 The NSF is funding selected collections...

20. 20 The Core Integration task is to provide a coherent set of services for users across great diversity.... and a Core Integration team

21. 21 Resources Core Integration Budget $4 million Staff 25 - 30 Management Diffuse How can a small team, without direct management control, create a very large-scale digital library?

22. 22 A spectrum of interoperability

23. 23 Approaches to interoperability The conventional approach  Wise people develop standards: protocols, formats, etc.  Everybody implements the standards.  This creates an integrated, distributed system. Unfortunately...  Standards are expensive to adopt.  Concepts are continually changing.  Systems are continually changing.

24. 24 Interoperability is about agreements Technical agreements cover formats, protocols, security systems so that messages can be exchanged, etc. Content agreements cover the data and metadata, and include semantic agreements on the interpretation of the messages. Organizational agreements cover the ground rules for access, for changing collections and services, payment, authentication, etc. The challenge is to create incentives for independent digital libraries to adopt agreements

25. 25 Function versus cost of acceptance Function Cost of acceptance Many adopters Few adopters

26. 26 Example: Textual mark-up Function Cost of acceptance SGML ASCII HTML XML

27. 27 Federations Collections follow strict standards for content, metadata, protocols, authentication, etc. Harvested Collections Each collection makes metadata about its collections available in a simple exchange format (Open Archives metadata harvesting protocol). Gathered Collections Material is gathered automatically by selective web crawling. Levels of interoperability

28. 28 Levels of interoperability LevelAgreementsExample FederationStrict use of standardsAACR, MARC (syntax, semantic, Z 39.50 and business) HarvestingDigital libraries exposeOpen Archives metadata; simple protocol and registry GatheringDigital libraries do not Web crawlers cooperate; services mustand search engines seek out information

29. 29 Metadata is expensive The NSDL cannot afford to create it manually

30. 30 User portals Distributed collections Metadata repository

31. 31 Every collection is different

32. 32 From an NSF-funded collection: “We are pleased with the technical side…of the database and web access…but we are complete novices in terms of how to make our collection part of the digital library. I assume this hinges on appropriate metadata, but I am not sure exactly what kinds…”

33. 33 Metadata strategy Support eight standard formats Collect all existing metadata in these formats Provide crosswalks to Dublin Core Expose records in the metadata repository for others to harvest Concentrate on collection-level metadata Use automatic generation to augment item-level metadata Most Core Integration services will be created automatically from collection-level metadata or directly from the content (e.g automatic indexing of text, automatic reference linking).

34. 34 Managing the NSDL Responsibility without authority

35. 35 A personal observation Despite all the evidence to the contrary,... we repeatedly over-estimate the benefits of collaboration... and under-estimate the obstacles.

36. 36 During the preliminary phases... Each project worked independently (NSF grants have little control) Coordination was through a loose set of committees, with mailing lists, bulletin boards, etc. The NSDL challenge

37. 37 During the preliminary phases... Each project worked independently (NSF grants have little control) Coordination was through a loose set of committees, with mailing lists, bulletin boards, etc. For the production phase... We must develop a robust, reliable set of services We must make compromises, decide priorities, etc. Yet we must attract the energy of many independent individuals and organizations The NSDL challenge

38. 38 What doesn't work Decision making by online forums Become dominated by a few people, not necessarily the most knowledgeable. Either usage dies away, or too many low-value messages drive away the busy people. Decision making without responsibility Vision is easy. Implementation is hard.

39. 39 What does work? Money Thank you NSF! Online discussions on specific topics Structured discussions as part of a decision-making process are often productive Patience and persistence Success builds on success

40. 40 The last word From the Lisle, NY Volunteer Fire Brigade September 17,2001 United we stand. God bless America. Bingo, Tuesday 7:30 - 10:00.

41. 41 Building the National S Digital Library William Y. Arms Cornell University