ALCME: OAI at OCLCALCME: OAI at OCLC

Jeffrey A. Young

OCLC Online Computer Library Center, Inc.

Project communityProject community

Networked Digital Library of Theses and Dissertations (NDLTD) project

Develop open-source applications for the creation and maintenance of a distributed catalog of theses and dissertations (ETD)

Visit http://www.ndltd.org/

and http://purl.org/alcme/

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Thesis Metadata Standard Thesis Metadata Standard (TheMS)(TheMS)Dublin Core-based, with additional elements from

new namespacesResource Description Framework (RDF) basedIncorporates linking to a distributed name authority

database

NDLTD’s use of OAINDLTD’s use of OAI

Distribution mechanism for thesis and dissertation records

Distribution mechanism for name authority metadata (proposed)

OAI alpha-test collectionOAI alpha-test collection

ETDCat: Thesis and dissertation records extracted from OCLC’s WorldCat database

Currently, a 100,000 record subset in Dublin Core format (~2 million total)

Eventually, will support NDLTD’s TheMS metadata format

Visit http://purl.org/alcme/

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Technical infrastructureTechnical infrastructure

OAICat: an open-source OAI protocol implementation (Java Servlet web application)

OAIHarvester: an open-source OAI harvester (Java application) Assuming there is a Java interface to your database engine,

customization could be accomplished in a matter of a few hours

Technical infrastructure (related)Technical infrastructure (related)

Gwen/Pears: open-source database and search engine MARC to Dublin Core converter (http server based on

the crosswalk used in OCLC’s CORC service) Extensible Open RDF (EOR): an open-source RDF

toolkit (in development)

Design approachDesign approach

Open-source to avoid duplication of effort Modular design for ease of maintenance Use existing tools wherever possible, such as Java Servlets and

XSLT Easy to deploy Easy to customize

Development challengesDevelopment challenges

NDLTD’s TheMS format is based on the Resource Description Framework (RDF)

NDLTD’s TheMS format expects a linking mechanism for name authority data

From hereFrom here

Clean and release the OAIHarvester software for others to use

Prototype the NDLTD authority linking mechanism

Add TheMS format support to the thesis and dissertation repository (ETDCat)

Contact me at: jyoung@oclc.org

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