Part 3 of a Linked Data Workshop for library staff at University of Oregon and Oregon State University Libraries.

1. Linked Data in Oregon
Digital
Oregon Digital Linked Data
Workshop, Eugene Oregon
November 25, 2013
Karen Estlund
kestlund@uoregon.edu
Tom Johnson
thomas.johnson@oregonstate.edu

2. Oregon Digital CONTENTdm Fields

3. Mapping Terms

4. Term Use Principles / Process
1. Use Existing Terms / Predicates
a. Use Dublin Core as a base element set
b. Use additional Linked Open Data (LOD) predicates
c. Use additional established terms & make LOD
2. Create New Terms / Predicates
a. Only if specialized but useful for wider audience
b. Make available as Linked Open Data
3. Don’t use Term
a. Archive term & value in previous version of record
4. Identify Controlled Vocabularies for Field
Values / Objects
a. Follow principles 1-3 above

5. Sample Vocabularies / Terms Used

6. The Migration Process
1. Copy <desc> files from CDM server
2. Map to full resolution files (if applicable)
3. Metadata Cleanup
a. Clean up field values through script (e.g. unicode
problems, spelling, compacting like terms)
b. Map field values to LOD through script (e.g.
geonames)
c. Use field mapping script for new predicates
4. BagIt!
5. Ingest

7. Mapping File Example
mappings:
title: dct:title
digita: dct:isPartOf
creato: marcrel:pht
date: dct:date
dmcreated: dct:created
dmmodified: dct:modified
descri: dct:description
subjec: dce:subject
object: dct:type
spatial:
method: geonames
identi: dct:identifier
item_url: dct:replaces
fullrs: oregon:full
find: premis:originalName

8. Record in Fedora Example
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/title> "Picking
potatoes" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/isPartOf> "Braceros
in Oregon Photograph Collection" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/date> "1947" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/description>
"Mexicans picking potatoes on lake bottom farm belong to Scott Warren, Klamath Falls" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/subject>
"Agricultural laborers--Mexican--Oregon; Harvesting; Potatoes" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/spatial> "Klamath
County (Ore.)" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/type> <http://purl.
org/dc/dcmitype/Image> .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/elements/1.1/type> "Film
negatives" .
<http://oregondigital.org/resource/187bdr9> <http://opaquenamespace.org/terms/collection>
"Extension and Experiment Station Communications Photograph Collection (P120)" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/identifier> "P120:
2599" .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/elements/1.1/rights>
"Permission to use must be obtained from OSU Archives." .
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/created> "2002-10-14"
.
<http://oregondigital.org/resource/187bdr9> <http://purl.org/dc/terms/modified> "2011-12-

9. Custom Terms
Controlled Vocabularies:
➢ Conversions from vocabs used in ContentDM
➢ Defined in Dublin Core Abstract Model
Predicates/Ontologies:
➢ Misc. Terms (e.g. fullResolution,
digitizationSpecification)
➢ Sheet Music Ontology

10. Draft New Ontology Term Example
<!-- http://ns.oregondigital.org/sheetmusic/ -->
<owl:Ontology rdf:about="">
<terms:title>Sheet Music</terms:title>
</owl:Ontology>
<!-- http://purl.org/dc/terms/title -->
<owl:AnnotationProperty rdf:about="&terms;title">
<rdf:type rdf:resource="&owl;ObjectProperty"/>
<skos:scopeNote xml:lang="en">A word or phrase that names the resource being described.</skos:
scopeNote>
</owl:AnnotationProperty>
<owl:AnnotationProperty rdf:about="&terms;alternative">
<rdf:type rdf:resource="&owl;ObjectProperty"/>
<skos:scopeNote xml:lang="en">
The "alternative title" data is used for other titles not covered elsewhere in the metadata record.
</skos:scopeNote>
</owl:AnnotationProperty>
<owl:ObjectProperty rdf:about="firstLine">
<rdfs:isDefinedBy rdf:datatype="&xsd;anyURI">
http://ns.oregondigital.org/sheetmusic/firstLine
</rdfs:isDefinedBy>
<rdfs:label xml:lang="en">First Line</rdfs:label>
<rdfs:comment xml:lang="en">
The "First Line" data is a direct transcription of the first line of lyrics appearing in the song.
</rdfs:comment>
<rdfs:domain rdf:resource="&bibo;Document"/>