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Constance Mayer, Harvard University Peter Munstedt, MIT Jon Dunn, Indiana University

Sharing Digital Scores: Will the Open Archives Initiative Protocol for Metadata Harvesting Provide the Key?. Constance Mayer, Harvard University Peter Munstedt, MIT Jon Dunn, Indiana University February 15, 2003. OAI: Open Archives Initiative.

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Constance Mayer, Harvard University Peter Munstedt, MIT Jon Dunn, Indiana University

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  1. Sharing Digital Scores: Will the Open Archives Initiative Protocol for Metadata Harvesting Provide the Key? Constance Mayer, Harvard University Peter Munstedt, MIT Jon Dunn, Indiana University February 15, 2003

  2. OAI: Open Archives Initiative • Original problem: searching across e-print archives • Distributed searching hard • e.g. Z39.50 • Varying search semantics, capabilities • Network, server problems • Solution: metadata harvesting

  3. Metadata harvesting • Extract metadata from various sources • Build services on local copies of metadata all searching, browsing, etc. performed on the metadata here user Individual repositories can still support direct user interaction search for “Mozart” Service provider local copy of metadata metadata harvested offline metadata harvested offline metadata harvested offline metadata harvested offline Data providers . . .

  4. OAI roles • Data Providers • Repositories of metadata (and usually digital content) • Support harvesting of metadata via the OAI protocol • Currently 53 registered data providers • Service Providers • Harvest metadata from data providers using the OAI protocol • Implement user interface to data • Usually for searching, but other services also possible • Can be selective

  5. OAI protocol • Currently at version 2.0 • Carried over HTTP • Requests: HTTP GET or POST • Responses encoded in XML • Format defined via XML schema • Metadata in simple (unqualified) Dublin Core (and potentially other formats)

  6. Dublin Core elements • Contributor • Creator • Publisher • Rights • Date • Format • Identifier • Language • Coverage • Description • Type • Relation • Source • Subject • Title

  7. OAI verbs

  8. OAI resources • Web site, mailing lists • Repository explorer • Data/service provider toolkits www.openarchives.org

  9. Examples of OAI service providers • UIUC Cultural Heritage Repository • http://oai.grainger.uiuc.edu/ • UMich OAIster • http://www.oaister.org/ • RLG Cultural Materials • http://www.rlg.org/culturalres/ • UCLA/JHU/IU Sheet Music Harvester • http://unitproj.library.ucla.edu/music/

  10. Becoming an OAI data provider • Make digital content available on web • Translate metadata into Dublin Core • Crosswalks exist for MARC • Can also make other formats available, e.g. MARC XML • Choose a unique identifier system • Set up OAI data provider server software • See tools list at www.openarchives.org • Depending on tool, uses its own database or operates over existing database

  11. Other technical concerns • Areas for standardization/agreement • Within-score navigation • User interface, supporting structural metadata • Image file formats: delivery, preservation • MARC-DC metadata crosswalk • Not essential to OAI model, but enables more consistent user experience • Packaging scores for exchange between libraries, e.g. for e-reserves, cooperative preservation • Can METS play a role?

  12. Contact us… • Constance Mayer • mayer@fas.harvard.edu • Peter Munstedt • pmunsted@mit.edu • Jon Dunn • jwd@indiana.edu

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