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Access to distributed resources

Access to distributed resources. Lorcan Dempsey VP, Research Research Library Directors Conference OCLC Institute Post-Conference, "Building the Global Digital Library: Access, Transform, Create, Integrate," Wednesday, March 6. From portal to environment.

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Access to distributed resources

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  1. Access to distributed resources Lorcan Dempsey VP, Research Research Library Directors Conference OCLC Institute Post-Conference, "Building the Global Digital Library: Access, Transform, Create, Integrate," Wednesday, March 6

  2. From portal to environment • Unified discovery experience across heterogeneous resources • Focus on access rather than use • Overview • Retrospective look at portals (Z) • OAI • Towards an information environment

  3. Presentation Mediation Resources The portal/gateway/broker – mid 90s Aligned presentation Individualpresentation Flexiblepresentation Independentapplications Independent applications United service Components/data Monolithic Monolithic

  4. Discover Locate Request Deliver Z39.50 Z39.50 Resolution Z39.50 ILL Collection/item Use Use Vertical and horizontal integration

  5. User access Informationlandscape User profiles Authentication & authorisation Environment intelligence SchemaDescription Collection Description ServiceDescription Distributed services access DeliveryInterfaces Search Interfaces RequestInterfaces Broker component examples

  6. Some observations • ‘interoperability’ a mantra • Scepticism about ‘strong’ interoperability • Limited targets • Information landscape vs information brandscape • Some emerging demand • Reference linking • Metadata sharing (OAI) • Authentication/authorisation

  7. OAI Server#1 DC & EAD DC DC/MARC Union Catalog OAI Server#2 DC & MARC MARC HTML DC Web Browser OAI Server#3 DC & VRA OAI-based mediation OAI Harvester

  8. Z and OAI working together • http://www.humbul.ac.uk • http://www.rdn.ac.uk • http://www.renardus.org

  9. HUMBUL EEVL PSIgate BIOME SOSIG OAI-PMH RDN Z39.50 Person Person Person Z39.50 client, e.g. Renardus

  10. Towards an information environment • No single resource is the sole focus of a user’s attention • In a distributed environment resources can be specialized to provide particular function • Leverage communication between resources to add value to user’s experience

  11. provision content shared services brokers and aggregators infrastructure mediation portals presentation

  12. Presentation/Portals • Surface resources, pulling together other services available in the environment • Learning management, library portal, ‘button’ services • Tools for manipulation, analysis, assembly, play, … • No prescription

  13. Infrastructure/Shared services • Add value to applications by being provided as part of infrastructure • Directory services: environment intelligence • Collection description • Service description • Schema description

  14. Infrastructure/Shared services • Resolution • Resolution service • Institutional profiling • Personal profiling • Authorization • Knowledge services • Gazetteer • Terminology services

  15. Applications/Mediation • Services which mediate access to distributed heterogeneous resources • Search services (z39.50, ..) • Gathering services (OAI, ..) • Alerting services

  16. Content • Metadata and data of interest

  17. A note on metadata • Data which supports operations on entities • Life cycle • Creation, discovery, assembly, administrative, contextual, preservation, rights, … • Domain • Learning, library, archives, etc

  18. A couple of other ‘consensus’ issues • Semantic diversity – common sense • subject • audience level (who is this resource aimed at?) • resource type (what kind of resource is this?) • certification (who has created this resource?) • Collection description

  19. Some issues • Focus on standards and acronyms needs to give way to a focus on architecture • Clarifies roles and relationships • Bridges between business and technical perspectives by identifying specialised functions • Our organisational and business models do not well support such an approach • E.g. How do we secure infrastructure

  20. Thank you dempseyl@oclc.org

  21. Acknowledgments • Draws on work done over several years within UKOLN models project and the DNER • http://www.ukoln.ac.uk/models • http://www.dner.ac.uk/arch • http://www.oclc.org/research/staff/dempsey/publications.shtm

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