Access to distributed resources - PowerPoint PPT Presentation

About This Presentation
Title:

Access to distributed resources

Description:

Research Library Directors Conference OCLC Institute Post ... Monolithic. Flexible. presentation. United service. Components/data. Use. Use. Request. Locate ... – PowerPoint PPT presentation

Number of Views:46
Avg rating:3.0/5.0
Slides: 31
Provided by: hic63
Learn more at: https://www.oclc.org
Category:

less

Transcript and Presenter's Notes

Title: Access to distributed resources


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
The portal/gateway/broker mid 90s
Aligned presentation
Individualpresentation
Flexiblepresentation
Independentapplications
Independent applications
United service
Components/data
Monolithic
Monolithic
4
(No Transcript)
5
(No Transcript)
6
Vertical and horizontal integration
7
Broker component examples
8
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

9
OAI-based mediation
OAI Harvester
10
Z and OAI working together
  • http//www.humbul.ac.uk
  • http//www.rdn.ac.uk
  • http//www.renardus.org

11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
Towards an information environment
  • No single resource is the sole focus of a users
    attention
  • In a distributed environment resources can be
    specialized to provide particular function
  • Leverage communication between resources to add
    value to users experience

20
provision
content
shared services
brokers and aggregators
infrastructure
mediation
portals
presentation
21
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

22
Infrastructure/Shared services
  • Add value to applications by being provided as
    part of infrastructure
  • Directory services environment intelligence
  • Collection description
  • Service description
  • Schema description

23
Infrastructure/Shared services
  • Resolution
  • Resolution service
  • Institutional profiling
  • Personal profiling
  • Authorization
  • Knowledge services
  • Gazetteer
  • Terminology services

24
Applications/Mediation
  • Services which mediate access to distributed
    heterogeneous resources
  • Search services (z39.50, ..)
  • Gathering services (OAI, ..)
  • Alerting services

25
Content
  • Metadata and data of interest

26
A note on metadata
  • Data which supports operations on entities
  • Life cycle
  • Creation, discovery, assembly, administrative,
    contextual, preservation, rights,
  • Domain
  • Learning, library, archives, etc

27
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

28
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

29
Thank
you
dempseyl_at_oclc.org
30
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/publica
    tions.shtm
Write a Comment
User Comments (0)
About PowerShow.com