Increasing points of access – a guide to metadata harvesting

Open Access MILE Conference London January 28 th 2009 A Picture’s Worth a Thousand Euros – Return on Investment? How to improve the cultural AND commercial potential of your image collection. Niamh Brennan Trinity College Dublin Garret McMahon Trinity College Dublin Increasing points of access – a guide to metadata harvesting

What’s the issue?
“Providing the public with digital access to a collection of images is a necessity, but simply publishing them online doesn't make them accessible…”
- Charlotte Sexton, Deputy Head New Media, The National Gallery

Interoperability… What’s the solution? “… the ability of systems, services and organisations to work together seamlessly toward common or diverse goals”.

Interoperability for discovery of and access to images
Requires OPEN STANDARDS for both
Communication between systems (digital archives, repositories, etc.)
and
2 . Description of resources and collections

OAI Metadata Harvesting – What is it?
OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) is a protocol developed by the Open Archives Initiative
Based on standards that are Open and freely available
Can support any metadata schema
Can be incremental
Supports federated discovery services based on aggregated and shared metadata

What are they using?
Open Archives Initiative (standard) compliant repositories
Agreed set of metadata
OAI Harvester (+ validator, aggregator)
Front end

OAI Harvesting: How it works

OAI Harvesting: How it works OAI Harvester Get List

Discovery of, and access to, images across distributed digital libraries/archives can be achieved easily and cost-effectively via metadata harvesting

Interoperability for discovery of and access to images
Requires OPEN STANDARDS for both
Communication between systems (digital archives, repositories, etc.)
and
2 . Description of resources and collections

Research publications
Etheses
Epublishing/Grey Literature
Images

Higher Education Authority -funded under Strategic Innovation Fund
National Development Plan
Research as critical to economic development
National research profile
Managed by the Irish Universities Association
IReL-Open Initiative

OAI Harvesting is not a panacea It needs help!

From: Sefton, Peter (2009) What the OAI-ORE protocol can do for you, [blog entry], PSetfton, 14/10/2008 http://ptsefton.com/2008/10/14/what-the-oai-ore-protocol-can-do-for-you.htm Australian University Repository Census (AUIRC) search Australian Research Repositories Online to the World (ARROW) search

Combined approach:
Standardisation & mapping – agreement on same terms where possible
Dumbing down & mapping – exposure of lowest common denominator terms only eg 1 date field only
Normalisation at harvester end – harvester/validator automatically ‘understands’ and re-labels data

Agreement on a Core Set of Metadata Elements for harvesting
Use Simple [i.e. unqualified] Dublin Core as the foundation for the Core Set
Ensure that the Core Set adequately represents the essential fields covered by the major metadata schemas
Keep the number of mandatory fields to a minimum
Map the corresponding element/s in richer metadata schemas used locally to the elements in the Core Set
Expose only the elements corresponding to the Core Set for harvesting
At the local level document the mapping [cross-walk] used (eg. CDWAlite to Dublin Core, VRA Core to Dublin Core) and which elements are exposed for harvesting

Trintiy College Dublin VRA 3.0 to Qualified Dublin Core Crosswalk– page 1

VRA Core to IEEE LOM VRA Core 3.0/4.0/IEEE LOM Crosswalk for UCD School of Architecture/National Digital Learning Repository (NDLR) harvest/bulk upload– Version 2.0 [NB/JC 2009]

Where is the Value?
Maximum impact & exposure – works for commercial agencies and for publicly-funded institutions
Lightweight, easy implementation
Re-use of expensively created metadata for multiple purposes
Local control /national, international, specialist applications

Interoperability… What’s the solution? “… the ability of systems, services and organisations to work together seamlessly toward common or diverse goals”.

OPENING UP THE GATES OF KNOWLEDGE: A BEGINNERS GUIDE TO OAI-PMH , TrustDR Supporting Report , Version Control: V1 8/May/06 Authors: David Dripps, John Casey & Jackie Proven http://trustdr.ulster.ac.uk/work_in_progress/supporting_reports/Opening_up_the%20Gates_OAI-PMH.php
OAI for Beginners - the Open Archives Forum online tutorial http:// www.oaforum.org /tutorial/
National Library of Australia initiatives using the Open Archives Initiative protocol for metadata harvesting http://www.nla.gov.au/nla/staffpaper/2003/boston1.html#2a
Dewatripont, M et al. (2006) Study on the economic and technical evolution of the scientific publication markets in Europe. Final Report. January 2006. DGResearch, European Commission. Available at: http://ec.europa.eu/research/science-society/pdf/scientific-publicationstudy_en.pdf
Hegg, Kevin and Knab, Andreas. (2008) Interoperability: 2008 ARLIS/NA-VRA Summer Educational Institute, July 11, 2008 http://www.vraweb.org/seiweb/SEI2008_Presentations/SEI2008_Interoperability.ppt
Baca, Murtha (2008) Using Metadata Schemas to Encode and Disseminate Information and Images, MILE Metadata Classification Conference ‘Semantics, Semiotics, and Structures’, London, 18 January 2008
http://www.mileproject.eu/asset_arena/document/AL/BACAFORMILE@LONDON2008PART1FINAL.PDF
Baca, Murtha (2008) Creating Integrated Access to Collections On Line; Metadata Harvesting, MILE Metadata Classification Conference ‘Semantics, Semiotics, and Structures’, London, 18 January 2008 http://www.mileproject.eu/asset_arena/document/AL/BACAFORMILE@LONDON2008HARVESTINGFINAL.PDF
Digital Library Federation (2007) Best Practices for OAI Data Provider Implementations and Shareable Metadata: A joint initiative between the Digital Library Federation and the National Science Digital Library. http://webservices.itcs.umich.edu/mediawiki/oaibp/?TableOfContents
Sefton, Peter (2009) What the OAI-ORE protocol can do for you, [blog entry], PSetfton, 14/10/2008
http://ptsefton.com/2008/10/14/what-the-oai-ore-protocol-can-do-for-you.htm [ accessed 26/01/09
DRIVER Guidelines Version 2.0 (2008): Guidelines for content providers - exposing textual resources with OAI-PMH, November 2008 http://www.driver-support.eu/documents/DRIVER_Guidelines_v2_Final_2008-11-13.pdf [ accessed 26/01/09 ]
Arms, Caroline R. (2003) Available and useful: OAI at the Library of Congress in Library Hi Tech 21, (2), 2003, pp 129 - 139 http://memory.loc.gov/ammem/techdocs/libht2003.html [ accessed 26/01/09 ]

Open Access Niamh Brennan Trinity College Dublin Phone: +353 1 896 1646 Email: [email_address] Garret McMahon Trinity College Dublin Phone: +353 1 896 1646 Email: [email_address]

Increasing points of access – a guide to metadata harvesting

by Garret McMahon on Apr 12, 2009

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