constance mayer, harvard university peter munstedt, mit jon dunn, indiana university
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
Sharing Digital Scores: Will the Open Archives Initiative Protocol for Metadata Harvesting Provide the Key?
Constance Mayer, Harvard University
Peter Munstedt, MITJon Dunn, Indiana University
February 15, 2003
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
Metadata harvesting Extract metadata from various sources Build services on local copies of
metadatauser
. . .
search for “Mozart”
local copy ofmetadata
metadataharvested offline
metadataharvested offline
metadataharvested offline
metadataharvested offline
all searching, browsing, etc. performed on the metadata hereIndividual repositories can
still support direct userinteraction
Data providers
Service provider
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
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)
Dublin Core elements Coverage Descriptio
n Type Relation Source Subject Title
Contributor Creator Publisher Rights Date Format Identifier Language
OAI verbs
Verb Function
Identify description of archive
ListMetadataFormats metadata formats supported by archive
ListSets sets defined by archive
ListIdentifiers OAI unique ids contained in archive
ListRecords listing of N records
GetRecord listing of a single record
OAI resources Web site, mailing lists Repository explorer Data/service provider toolkits
www.openarchives.org
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/
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
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?
