do real archivists use oai mid atlantic regional archives conference gettysburg pa october 31 2003
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Chris Prom Assistant University Archivist University of Illinois at Urbana-Champaign. Do Real Archivists Use OAI? Mid-Atlantic Regional Archives Conference Gettysburg, PA October 31, 2003. http://web.library.uiuc.edu/ahx/workpap/marac03.ppt. Goals. Examine rationale for archivists to use OAI

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do real archivists use oai mid atlantic regional archives conference gettysburg pa october 31 2003
Chris Prom

Assistant University Archivist

University of Illinois at Urbana-Champaign

Do Real Archivists Use OAI?Mid-Atlantic Regional Archives ConferenceGettysburg, PAOctober 31, 2003

http://web.library.uiuc.edu/ahx/workpap/marac03.ppt

goals
Goals
  • Examine rationale for archivists to use OAI
  • Describe my involvement in the University of Illinois Mellon OAI project
  • Speculate on OAI’s present and future
  • Suggest how archivists may wish to get involved with OAI
should archivists use oai
Should Archivists Use OAI?
  • OAI use growing, well-supported, (relatively) simple
  • NSDL base format, NCSTRL project
  • Allows metasearches across projects and data types (not content specific)
  • DL projects for archives, manuscripts, photos, artifacts, objects use a variety of metadata standards
  • Provides wider exposure for collections
  • University of Michigan OAIster service illustrates both promise and problems
slide7

NOT a link to NAACP

visual materials finding aid

slide8

Found! (. . . 20 mins later)

5,000+ items! (11 online)

uiuc mellon project goals
UIUC Mellon Project Goals
  • Test feasibility of harvesting, searching cultural heritage with OAI
  • Develop data provider tools that produce usable OAI records from disparate sources (MARC, EAD, databases, etc)
  • Build open-source service provider tools
  • My role: EAD/OAI
    • assess structural problems in mapping to OAI
    • develop an effective crossmapping
    • allow basic searching in an OAI environment
    • test effectiveness of the search
    • provide proof of concept
our approach
Our approach
  • “Dumbing down” metadata has benefits
  • Examined EAD encoding standards
  • Generated multiple OAI records for one EAD
    • top-level record drawn from <eadheader> and <archdesc>
    • mini records from <dsc>, with relation to top level
  • Preserve context for “hits” by linking user to finding aid in the search/retrieval mechanism
  • relations between levels in the finding aid rendered implicitly by our service provider, not within the OAI record
our data and service providers
Our Data and Service Providers
  • OAI Repository (Data Provider)
    • Snapshot of ~5,500 EAD finding aids mirrored on UIUC server
    • responds to HTTP get and post with ASP scripts and XSLT stylesheet to provide requested data
    • Records produced from EAD include XPointer
    • When EADs are split into their subordinate components, Xpointers identify the individual parts
  • Service Provider
    • Server-side scripts use the XPointers in DC identifier tag for rendering and linking
    • Xpointer used to move user deep in finding aid, preserve context
xpointer
XPointer
  • WC3 Recommendation, March 2003: http://www.w3.org/XML/Linking
  • Can identify XML fragments using a superset of the XPath syntax, e.g. xyz.xml#xpointer(//dsc[1]/c01[2]/c02[3]/c03[10])
  • When EADs are split into their subordinate components, Xpointers identify the individual parts
  • To make it work, both data providers and service providers would need to share a set of assumptions about HOW it should work
slide13
<rdf:RDF> <rdf:Description> <dc:identifier> http://…/…/test.xml#xpointer(//dsc[1]/c01[8]/c02[5]/c03[244]) </dc:identifier> <dc:title>Toensing, Richard</dc:title> <dc:type>text</dc:type>

<dc:type>archives or manuscripts</dc:type>

<dc:type>file</dc:type>

<dcterms:isPartOf>

<rdf:Description>

<dc:identifier> http://…/…/test.xml#xpointer(//dsc[1]/c01[8]/c02[5]) </dc:identifier>

<dc:title>Various Composers</dc:title>

</rdf:Description>

</dcterms:isPartOf>

</rdf:Description>

</rdf:RDF>

what i learned
What I learned
  • Using OAI can exposure your collections to new audiences
  • Not good enough to harvest from image databases, nor just give just top-level link to FA
  • But many users confused when stumble on a finding aid; “where’s the beef”
  • An “archives friendly” service provider would
    • . . . Serve as basis for cross-repository searches
    • . . . Reenginner the notion of what is a finding aid by allowing access from the back end
    • . . . Undo some of the damage inflicted when archival materials are treated as items
    • . . . need to reconstruct context using local mirrors of the ead document
the future
The Future
  • OAI Currently better suited to representing digital objects than descriptive data
  • Service providers currently limited in number, 16 listed on openarchives.org
  • Will OAI take off?
  • IMLS Digital Collections and Content Project: (http://imlsdcc.grainger.uiuc.edu/)
data provider options
Data Provider Options
  • If you want to provide dynamic (full) OAI metadata
    • Metadata items in Relational database
      • Map fields or pages to DC record
      • Use webscripting language to respond to harvester requests
    • XML, e.g. Finding aid (as a digital object)
      • map from <eadheader> and <archdesc>
      • use encodinganalog recommendations from RLG Best Practices or pass entire EAD file with XSD schema
    • metadata for digital objects linked from EAD???
      • use XSLT and XPointer to provide context and allow service providers to replicate hierarchical structure of EAD.
      • Depends on SP’s ability to handle xpointer
data provider options cont
Data Provider Options, cont.
  • Static OAI metadata
    • Suitable for small collections which are not growing
    • All metadata should be contained in a single xml file on a webserver
    • Projects which will harvest metadata (e.g. IMLS Digital Collections and Content) may be able to provide assistance in conversion.
resources
Resources
  • OAI website:
    • http://www.openarchives.org/
  • UIUC Provider Tools
    • http://uilib-oai.sourceforge.net/
    • http://sourceforge.net/projects/uilib-ead/
  • Library Hi Tech, Vol 21, No. 2, special issue on OAI
  • Further implementation guidelines
    • http://dli.grainger.uiuc.edu/publications/twcole/jcdl-oai/JCDL_2003_OAI_Intro.ppt
  • This powerpoint:
    • http://web.library.uiuc.edu/ahx/workpap/marac03.ppt
do real archivists use oai mid atlantic regional archives conference gettysburg pa october 31 20031
Chris Prom

Assistant University Archivist

University of Illinois at Urbana-Champaign

Do Real Archivists Use OAI?Mid-Atlantic Regional Archives ConferenceGettysburg, PAOctober 31, 2003

http://web.library.uiuc.edu/ahx/workpap/marac03.ppt

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