eun lre brussels_winer20100616
DESCRIPTION
Presentation on the Europeana Data Model at the : EUN Aspect LRE Technical Semantic Iteroperability Workshop, Brussels, 15-16 June 2010TRANSCRIPT
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Europeana Data Model
Dov Winer
MAKASH Advancing CMC in Education, Culture
and Science (IL)
Scientific Manager, Judaica Europeana (EAJC, UK)
ASPECT LRE Technical & Semantic Interoperability Workshop
Brussels, June 15-16, 2010
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http://linkeddata.org/ http://esw.w3.org/DataSetRDFDump
http://esw.w3.org/TaskForces/CommunityProjects/LinkingOpenData/DataSets/Statistics (~13 Billion triplets March 9, 2010)
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http://esw.w3.org/SweoIG/TaskForces/CommunityProjects/LinkingOpenData
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• Europeana: update
• A Digital Library System, offering APIs,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed)
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Europeana ― the vision
Europe’s digital libraries,
archives and museums
online
• A showcase for Europe’s
cultural and scientific
heritage
• A flagship project of the
European Commission and
the European Parliament.
“A digital library that is a single,
direct and multilingual access point
to the European cultural heritage.”
European Parliament, 27 September 2007
“A unique resource for Europe's
distributed cultural heritage …
ensuring a common access to
Europe's libraries, archives and
museums.”
Horst Forster, Director, Digital Content &
Cognitive Systems Information Society
Directorate, European Commission
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Jill Cousins, Europeana Foundation, May 2010, Berlin
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Judaica
Europeana
HOPE
Assets
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Jews in European Cities – kinds of content
Known celebrities – full individual expression
Core of Jewish Life
Jewish expressions in the
urban landscape
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Jews in European Cities
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From Jill Cousins (2010)
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From Jill Cousins (2010)
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From Jill Cousins (2010) From Repository to WunderKamer: user
participation in Europeana. DISH 2009 Rotterdam
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eBooks on Demand
From Silvia Gstrein, eBooks on Demand, Europeana Connect meeing
Berlin April 2010
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• Europeana: update
• A Digital Library System, offering APIs,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed)
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Slide taken from the presentation by Cesare
Concordia, ISTI/CNR at the LIDA 2009 Workshop
F
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C. Concordia et al. (2009). Not (just) a Repository, not (just) a Digital
Library, nor (just) a Portal: A Portrait of Europeana as an API.
IFLA, Milan.
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C. Concordia et al. (2009). Not (just) a Repository, not (just) a Digital
Library, nor (just) a Portal: A Portrait of Europeana as an API.
IFLA, Milan.
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• Europeana: update
• A Digital Library Application, offering API,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed)
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Slide taken from the presentation by Cesare
Concordia, ISTI/CNR at the LIDA 2009 Workshop
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• Europeana: update
• A Digital Library System, offering APIs,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed)
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Slide taken from the presentation by Cesare
Concordia, ISTI/CNR at the LIDA 2009 Workshop
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From Gradmann (2008)
http://www.slideshare.net/gradmans/europeana-semantica
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• Europeana: update
• A Digital Library System, offering APIs,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed) EDM presentation
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EDM
Europeana Data Model
Guus Schreiber
with input from Carlo Meghini, Antoine Isaac, Stefan
Gradmann, Makx Dekkers et al. from Europeana V1
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Background reading
• EDM Primer
http://www.few.vu.nl/~aisaac/edm/EDM_Primer_100401.pdf
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Rationale of EDM
• Precursor: ESE (Europeana Semantic Elements)
– used in 2008 version of Europeana
– represents lowest common denominator for object metadata
• convert datasets to Dublin-Core like standard
– forces interoperability
– major drawback: original metadata is lost
• EDM goals
– preserve original data while still allowing for interoperability
• Semantic Web representation
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EDM requirements
1. Distinction between “provided object” (painting, book, program) and digital
representation
2. Distinction between object and metadata record describing an object .
3. Allow for multiple records for same object, containing potentially
contradictory statements about an object
4. Support for objects that are composed of other objects
5. Standard metadata format that can be specialized
6. Standard vocabulary format that can be specialized
7. EDM should be based on existing standards
– “not yes another standard” !
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EDM basics
• OAI ORE for organization of metadata about an object
– Requirements 1-4
• Dublin Core for metadata representation
– Requirement 5
• SKOS for vocabulary representation
– Requirement 6
OAI ORE, Dublin Core and SKOS together fulfil Requirement-7!
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EDM representation: RDF standard
• Ovals are web resources with a URL
• Arcs are properties linking resources to other resources or to
literals
• Resources belong to classes
• RDF model can be specialized using subclass and subproperty
definitions
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Dublin Core
• EDM uses the latest version of DCMI Metadata Terms
http://dublincore.org/documents/dcmi-terms/
• Specified with an RDF model
• Specialization of 15 original DC elements
dcterms:coverage
dcterms:spatial
dcterms:temporal
• Can be specialized itself
– see requirement
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SKOS: vocabulary publication on the Web
• W3C standard
http://www.w3.org/TR/skos-primer/
• Adopted by large institutions such as Library of Congress
• Specified with an RDF model
• Can be specialized itself
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OAI ORE
Open Archives Initiative Object Reuse & Exchange
• Specification:
http://www.openarchives.org/ore/1.0/toc.html
• Specified with an RDF model
• Four key notions (RDF classes)
– Object: the book/painting/program being described
– Aggregation: organizes object information from a particular provider (museum,
archive, library)
– Digital representation: some digital form of the object with a Web address
– Proxy: the metadata record for the object
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The Example - 1
45
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The Example - 2
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Aggregation organizes data of a provider
47
aggregation
digital representation
object
provenance
metadata
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Proxy: metadata record for an object
48
proxy
object
metadata
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Multiple aggregations = multiple providers
49
aggregation
of DMF
aggregation
of Louvre
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Europeana is “just” a special provider
with processed/enriched metadata
50
Europeana
aggregation
enriched
metadata
landing
page
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Advanced modeling in EDM
• See the documentation
• Relations between “provided” objects
– Part-whole links for complex objects
– Derivation and versioning relations
• Predefined classes for person, place, time and event
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• Europeana: update
• A Digital Library System, offering APIs,
… with a portal
• Europeana Semantic Elements (present)
• Europeana Data Model (being
completed) EDM presentation
• Judaica Europeana vocabularies
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Who?
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When?
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When?
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The award-winning Where Once We Walked
(WOWW) has been completely revised and
updated to reflect the changes in the political
geography of Central and Eastern Europe
since WOWW was published in 1991. There
are also a number of improvements to the
original edition noted below. The new edition
identifies more than 23,500 towns in Central
and Eastern Europe where Jews lived
Where?
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Where?
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vocabula
rie
s
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vocabula
rie
s
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vocabularies
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vo
cabula
rie
s