digital surrogates of physical objects artifacts, specimens, textiles
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TRANSCRIPT
Middle East Digital Library WorkshopBibliotheca Alexandrina, 15-17 January 2006
OAI-PMH in Practice:Lessons Learned from the
IMLS Digital Collections & Content Project
Timothy W. Cole ([email protected])
Grainger Engineering Library Information Center University of Illinois at Urbana-Champaign
17 JAN 2006 [email protected]
University of Illinois at UC 2
IMLS Digital Collections & Content Project
A collection registry & item-level metadata repositoryhosted by the University of Illinois at Urbana-Champaign
Test assumptions of the IMLS/NISO Framework of Guidance For Building Good Digital Collections
Enhance visibility & utility of digital collections & content funded by IMLS
Research & experiment with interoperability, OAI-PMH Collection identity, metadata normalization & enrichment for
specific audiences, portal interface & functional design
Collaborative effort of UIUC Library & Library School Period of Performance: Oct. 2002 – Sept. 2007
17 JAN 2006 [email protected]
University of Illinois at UC 3
IMLS-DCC Collection Registry
108 NLG primary collection records Includes additional 40 records for sub-collections Also 29 associated / 61 physical collections
158 IMLS NLG projects represented Objects represented in registered collections
Images: prints, posters, photographs Text: books, archival finding aids, newspapers Digital surrogates of physical objects: artifacts, specimens,
textiles Sound: oral histories, sound files, wax cylinders Interactive resources Moving image Datasets
17 JAN 2006 [email protected]
University of Illinois at UC 7
IMLS DCC Metadata Repository
30 collections represented 35 OAI-PMH repositories harvested ~250,000 item-level metadata records indexed
Harvest in Simple Dublin Core & MARC 21 XML Testing with Qualified Dublin Core
Issues being explored: How metadata best practices are being adopted Local context versus global context Intentional creation & development of digital collections Ways to customize aggregation interface to audience
17 JAN 2006 [email protected]
University of Illinois at UC 8
Sample of Metadata Statistics
Collection 1 Collection 2 Collection 3 Collection 4
Number of records in collection
27,444 14,425 1,599 35
Type of collection
Large collaborative digitization project
Large academic library
Small academic library and public library collaboration
Small academic library
% of records with DC element <title>
100 99 100 100
% of records with DC element <creator>
59 100 57 83
% of records with DC element <subject>
97 100 57 0
17 JAN 2006 [email protected]
University of Illinois at UC 13
Plans for next 2 years
IMLS has extended grant through 2007
Will add a sample of LSTA-funded projects
Other themes for extension phase Integration of item-level & collection-level services Metadata normalization, transformation, and enrichment Interface & metadata design for targeted audiences (GEM) Collection identity & metadata granularity Knowledge diffusion of metadata best practices
17 JAN 2006 [email protected]
University of Illinois at UC 14
OAI-PMH: Lessons Learned
OAI-PMH approach can be useful Data provider & service provider partnership critical Extensions help make OAI-PMH even more ‘lightweight’
Metadata quality & consistency still essential Shareable metadata must be assessed differently: issues
of context, descriptive granularity & repurposing magnified Responsibility for metadata effectiveness sharedhttp://oai-best.comm.nsdl.org/cgi-bin/wiki.pl?OAI_Best_Practices
Need added agreements & structure to make OAI-PMH useful – metadata schemas, authority registries, …
17 JAN 2006 [email protected]
University of Illinois at UC 15
Need 1: Collection Identity / Descriptive Granularity
Better understand implications of descriptive granularity, collection identity, & how to exploit collection-item relationships
Pre-defined, virtual, & dynamic collections can support Resource co-location for grouping, browsing, filtering User selection of more relevant search results Context supporting user interpretation of item description Optimum search granularity varies with information need:
Search at collection-level, item-level, or search item and collection descriptions in combination
17 JAN 2006 [email protected]
University of Illinois at UC 17
Need 2: Dissemination of Resource Objects
Develop agreements on how to label, request, & disseminate standard views of resource objects
Metadata sharing only a starting point; other goals are resource sharing, tools that act on resources, … What are standard views of canonical object types?
How can service providers request desired views?
How can service providers know available views?
How can service providers add views of an object?
17 JAN 2006 [email protected]
University of Illinois at UC 18
Need 3: Shared Understanding of DL Function & Services
User needs must drive design; we need explicit agreement as to functions & services that define the Digital Library we want to build
Optimization for function will drive: Metadata authoring Metadata normalization & enrichment Requirements for schema & authority registries Requirements for content dissemination registries Development of ancillary tools & services
Different functional requirements can be in tension
aDORe Architecture (Los Alamos National Laboratory)
17 JAN 2006 [email protected]
University of Illinois at UC 20
IMLS DCC Project Accomplishments to Date
Collection registry & item-level repository publicly accessible:http://imlsdcc.grainger.uiuc.edu/collections/http://imlsdcc.grainger.uiuc.edu/search/
Research Publications to Date (selected):Shreeves, S.L. & Cole, T.W. 2003. Developing a Collection Registry for IMLS NLG Digital
Collections [Poster Abstract]. In DC-2003: Proceedings of the International DCMI Metadata Conference and Workshop p. 241-242.
Cole, T.W. & Shreeves, S.L. 2004. Search and discovery across collections: The IMLS Digital Collections and Content Project. Library Hi Tech 22(3): 307-322
Palmer, Carole L. and Ellen M. Knutson. 2004. Metadata practices and implications for federated collections. In Proceedings of the 67th Annual Meeting of the American Society for Information Science and Technology , Edited by Linda Schamber & Carol L. Barry. Medford, NJ: Information Today, Inc: 456-462.
Shreeves, S.L., Knutson, E.M., Stvilia, B., Palmer, C.L., Twidale, M.B., & Cole, T.W. (2005). Is ‘quality' metadata ‘shareable' metadata? The implications of local metadata practice on federated collections. In H.A. Thompson (Ed.) Proceedings of the Twelfth National Conference of the Association of College and Research Libraries, April 7-10 2005, Minneapolis, MN . Chicago, IL: Association of College and Research Libraries.
17 JAN 2006 [email protected]
University of Illinois at UC 21
IMLS DCC project contact information
Tim Cole, PI
University of Illinois Library at Urbana-Champaign
Jenny Benevento, Project Coordinator
+1-217-244-7809
http://imlsdcc.grainger.uiuc.edu/