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1. Drawing Context from the Linked Data Web:
The 20th Century Press Archives
Joachim Neubert
ZBW German National Library of Economics –
Leibniz Centre for Economics
ELAG 2011
Prague
25.5.2011
ZBW is member of the Leibniz Association

2. What are we dealing with?
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6. What are we dealing with?
Historic Press Archives, founded in 1909 (Hamburg) and 1914 (Kiel)
 Some material dating back to 1826
 Collections closed in 2005
Thematic dossiers covering
 Persons
 Companies
 Products
 General subjects and events
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7. Starting point for our Linked Data application
Former DFG funded project, resulting in
 Digitized roll films (material before 1949)
 Relational database about dossiers
 Big filesystem
 currently containing 250,000 publicly accessible documents
 roughly 650,000 pages
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8. Primary Goals of our application development
1. To give each and every collection, dossier, document, page and
even search result set a persistent identifier for citation and linking,
in order to support scholarly use.
2. To provide context from metadata on the web to users and link to
other data sources relevant to the domain, in order to enhance user
experience.
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9. Goal 1 – Minting Identifiers
Achieved through
 Nested OAI-ORE Aggregations
 Resource Maps expressed in
RDFa
 which provides also user
navigation paths and the API
=> Plain, bare structure
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14. Goal 2 – Providing context and links
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15. Goal 2 – Provide context and links
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16. Goal 2 – Providing context and links (cont.)
Enhanced user experience through
 Biographical dossiers with
 DBpedia abstracts and thumbnails
 Links to GND
 Links to VIAF
 Company dossiers with
 Links to GeoNames and geospatial information
 Documents with
 Links to Chronicling America (US newspaper archives)
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Synonyms lookup for personal names from GND o
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32. External data as an overlay structure
GeoNames provides a hierarchy of geographical objects:
gn:parentFeature generic hierarchy
gn:parentCountry country
gn:parentADM1 admin unit, 1st level, eg US state
gn:parentADM2 admin unit, 2nd level
gn:parentADM3 admin unit, 3rd level
gn:parentADM4 admin unit, 4th level
gn:contains list of child features (rdf document)
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33. External data as an overlay structure (cont.)
gn:nearbyFeatures list of nearby features (rdf document)
owl:sameAs dbpedia
“Import” GeoNames hierarchy to organize our own data for providing
 enhanced resource discovery and
 additional user navigation paths
on our web site
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34. So – what can we do with Linked Data?
 Enrich web sites with information curated elsewhere
 Provide multi-lingual contents
 Support resource discovery through authority files, thesauri,
synonym lists, etc.
 Exploit addtional structure imported from Linked Data sources into
our applications
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35. Thank you
Joachim Neubert
ZBW German National Library of Economics –
Leibniz Centre for Economics
j.neubert@zbw.eu
http://zbw.eu/beta/p20
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