Sharing Digital Scores: Will the Open Archives Initiative Protocol for Metadata Harvesting Provide the Key? Constance Mayer, Harvard University Peter Munstedt,

Presentation on theme: "Sharing Digital Scores: Will the Open Archives Initiative Protocol for Metadata Harvesting Provide the Key? Constance Mayer, Harvard University Peter Munstedt,"— Presentation transcript:

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 user... search for “Mozart” local copy of metadata harvested offline metadata harvested offline metadata harvested offline metadata harvested offline all searching, browsing, etc. performed on the metadata here Individual repositories can still support direct user interaction Data providers Service provider

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 Coverage Description Type Relation Source Subject Title Contributor Creator Publisher Rights Date Format Identifier Language

7 OAI verbs VerbFunction Identifydescription of archive ListMetadataFormatsmetadata formats supported by archive ListSetssets defined by archive ListIdentifiersOAI unique ids contained in archive ListRecordslisting of N records GetRecordlisting of a single record

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.orgwww.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?

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