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Webinar from the Mountain West Digital Library Sandra McIntyre, MWDL Director Anna Neatrour, MWDL Digital Metadata Librarian Want to understand what happens behind the scenes with the MWDL harvesting? In this webinar, Sandra McIntyre and Anna Neatrour will explain the Open Archives Initiative Protocol for Metadata Harvestiong (OAI-PMH) and how it makes metadata aggregation possible in the MWDL. They will explain the process of harvesting and how MWDL normalizes your metadata. They will also show you how you can learn from your collections' OAI stream by using the six query verbs (requests) defined in the OAI-PMH.
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Harvesting Using the Open Archives Initiative Protocol:
What Can Your OAI Stream Tell You?
Sandra McIntyre, MWDL DirectorAnna Neatrour, MWDL Digital Metadata Librarian
WHY OAI?The basics
Open Archives Initiative
Open Archives Initiative http://openarchives.org“Standards for Web Content Interoperability”
• Facilitate the efficient dissemination of content contained in archives/repositories
• Low-barrier framework and standards
Why is a protocol necessary?
OAI ProviderOAI Harvester
“I want it.” “I have it.”
?
?“Give me...”
“Here is what you requested.”
OAI-PMH
Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH)http://www.openarchives.org/pmh/
OAI Providers
OAI Providers
OAI Harvesters
OAIsterhttp://oaister.worldcat.org
and included in WorldCat
Mountain West Digital Libraryhttp://mwdl.org
Digital Public Library of Americahttp://dp.la/
Institute of Museum & Library Services
Digital Collections and Content http://imlsdcc.grainger.uiuc.edu
...and thousands more
Harvesting at MWDL
Mountain West
Digital Library
Univ of Utah
BYU
Southern Utah Univ
Utah Valley Univ
Utah State Univ
Weber State Univ
Salt Lake Comm. College
Utah State
Archives
Utah State
Library
Univ of Nevada
Las Vegas
Univ of Nevada
Reno
Utah Dvsn Arts
& Museums
Idaho State
ArchivesArizona Memory Project
Snow College
Northern Arizona
Univ
Univ of Idaho
Family Search
LDS Church History
Montana Memory Project
Stacks (Idaho)
Boise State Univ.
Why understand OAI?
• Predict what will happen with your metadata when it is harvested
• Do self-auditing and/or peer auditing of metadata: See patterns and find errors
Other metadata harvesting options
• Handing over a hard drive• Uploading/downloading via file
transfer protocol (FTP)• Other requests of XML (typically
application programming interfaces, APIs):– Web Services– X-Services
Advantages of OAI
• Update at a distance, anytime • Specify desired records
– By collection– By date range of last change to record
• Packets, one at a time• Works fast• Repeatable
THE PROTOCOLQueries and responses
Queries and Responses
OAI Provider
OAI Harvester
OAI respons
e
OAI query
Queries:OAI BaseURL
BaseURL = OAI provider root address(Doesn’t work alone)
Examples:• http://aura.abdn.ac.uk/dspace-oai/reques
t• http://absronline.org/journals/index.php/i
ndex/oai• http://cyberleninka.ru/oai• http://digitalcommons.usu.edu/cgi/oai2.c
gi• http://www.avhumboldt.net/oai/oai.php
OAI query
Queries:6 Verbs
Verb = type of requestInitial capitals; no spaces
Examples:• Identify• ListMetadataFormats• ListSets• ListIdentifiers• ListRecords• GetRecord
OAI query
Queries:Parameters & Values
Parameters & values = details about request
Format: parameter=valueExamples:• metadataPrefix=oai_dc• metadataPrefix=qdc• set=awhof• identifier=oai:content.lib.utah.edu:etd3/48
2
OAI query
EXAMPLESQueries you can use
Identify
OAI Provider
OAI Harvester
OAI respons
e
OAI query
http://contentdm.li.suu.edu/oai/oai.php?verb=Identify“Who are you?”
“I am the SUU CONTENTdm Server
Repository.”
“I am the SUU CONTENTdm Repository.”
Identify
ListSets
OAI Provider
OAI Harvester
http://contentdm.li.suu.edu/oai/oai.php?verb=ListSets
“What sets do you have available?”
“Here is the list of sets.”
OAI respons
e
OAI query
“Here’s the list of sets.”ListSets
ListMetadataFormats
OAI Provider
OAI Harvester
http://contentdm.li.suu.edu/oai/oai.php?verb=ListMetadataFormats“What metadata formats are available?”
“Here’s the list of metadata formats.”
OAI respons
e
OAI query
“Here’s the list of metadata formats.”
ListMetadataFormats
OAI query
ListRecords
OAI Provider
OAI Harvester
http://contentdm.li.suu.edu/oai/oai.php?verb=ListRecords&metadataPrefix=oai_qdc
“Give me the metadata for all records in qualified Dublin Core.”
“Here are the records.”
OAI respons
e
“Here are the records.”
ListRecords
ListRecords
• One set only:http://contentdm.li.suu.edu/oai/oai.php?verb=ListRecords&metadataPrefix=oai_qdc&set=hist_photos
• If more than one screen of records, use a resumption token to get the additional lists (200 at a time in this example):http://contentdm.li.suu.edu/oai/oai.php?verb=ListRecords&resumptionToken=hist_photos:200:hist_photos:0000-00-00:9999-99-99:oai_qdc
GetRecord
• One record only:http://contentdm.li.suu.edu/oai/oai.php?verb=GetRecord&metadataPrefix=oai_qdc&identifier=oai:contentdm.li.suu.edu:hist_photos/0
• Turning on OAI: Administrative interface in the “Server” tab
• Choosing which collections to share• Sharing compound object level metadata only
Image from CONTENTdm OAI guide: http://contentdm.org/help6/server-admin/oai.asp
CONTENTdm’s OAI Provider
Record -> OAILocal Record with Labels OAI
OAI -> MWDL
OAI MWDL
MWDL -> DPLA
MWDL DPLA
Some Final Things to Remember
• Check your own OAI stream and see what it looks like!– Mapped to none – not in OAI stream– Hidden set to yes – not in OAI stream– CONTENTdm field properties template and guide
available at: http://mwdl.org/getinvolved/getinvolved.php
– Login to collection admin, click on tab, go to fields to check and edit properties
Field Mappings in CONTENTdm
Field Mapping example from the Western Soundscape Archive
Try it yourself!
Resources available athttp://mwdl.org/getinvolved/getinvolved.php
We’re here to help!
• For additional questions about self-auditing your OAI contact Anna Neatrour:– anna.neatrour@utah.edu– 801-587-8883
• Any Questions?
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