steffen hennicke edm-wp2march28
DESCRIPTION
TRANSCRIPT
The Europeana Data Model
Largely based on the slides by Antoine Isaac
with input from Carlo Meghini, Guus Schreiber,
Stefan Gradmann, Makx Dekkers et al. from
Europeana v1.0
Talk by Steffen Hennicke (HU-Berlin) DM2E, WP2 Modeling Workshop, March 28th @ FU Berlin
“Europeana Data Model”
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EDM vs. ESE
Challenge for Europeana: (Rich) Integration of heterogeneous
CH-metadata.
Precursor of EDM: Europeana Semantic Elements (ESE)
• Used in first version of Europeana
• Represents lowest common denominator for object metadata
Converts datasets to Dublin-Core like “flat” standard
• Forces interoperability
“Simple and robust” approach but
Original metadata is lost
No easy connection to external contextualization resources
“Europeana Data Model”
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ESE Metadata Record
“Europeana Data Model”
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EDM Requirements & Principles
1. Distinction between “provided objects” (painting, book, movie, etc.)
and their digital representations
2. Distinction between “provided objects” and metadata records
describing an object
3. Allow for multiple records (“views”) on one object, containing
potentially contradictory statements about it
4. Support for objects that are composed of other objects (“complex
objects”)
5. Compatibility with different levels of description
6. Standard metadata format that can be specialized
7. Support for contextual resources, including concepts from controlled
vocabularies
“Europeana Data Model”
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EDM and other Ontologies
Using Semantic Web representation principles (RDF)
• Re-use and mix different vocabularies together
• Preserve original data and still allow for interoperability (Req. 6)
• OAI ORE (Open Archives Initiative Object Reuse & Exchange) for
organizing an object’s metadata and representation(s)
• Req. 1-4
• Dublin Core for descriptive metadata representation
• Req. 5
• SKOS (Simple Knowledge Organization System) for conceptual
vocabulary representation
• Req. 7
• Some constructs are inspired by CIDOC-CRM
“Europeana Data Model”
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EDM “Core Pattern”
A data provider submits to Europeana a logical “bundle” of an
object plus its digital representation(s).
The Aggregation organizes data of a provider.
the „complex construct“
of related resources
(e.g. metadata record)
the „described object“ or
„object of interest“
any „view“ related to the CHO
“Europeana Data Model”
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Complex Library Data
• METS with MODS
• Metadata about digitized „historical printings“
“Europeana Data Model”
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“Europeana Data Model”
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METS-File
Digital
Representations
Descriptive
Metadata
Administrative
Metadata
“Europeana Data Model”
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Logical Structure
“Europeana Data Model”
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Object Representation
„Described Object“
(Monograph)
Aggregation (Metadata Record),
first level
<mets:div ADMID="AMD" DMDID="DMDLOG_0000" ID="LOG_0000" LABEL="Dissertationum
Exegeticarum De Melchisedeco" TYPE="Monograph">
“Europeana Data Model”
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Provenance Metadata
Provenance of representations
and description
“Europeana Data Model”
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Descriptive Metadata
(in MODS)
“Europeana Data Model”
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WebResource
“Europeana Data Model”
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Descriptive Metadata
(in MODS)
“Europeana Data Model”
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Decriptive Metadata
Object-Centric Modelling
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Contextual Entities
edm:Agent: persons or organizations
edm:Place: spatial entities
edm:TimeSpan: time periods or dates
skos:Concept: entities from KOS
(edm:PhysicalThing)
(edm:Event)
Representing (real-world)
entities related to a provided
object as fully fledged
resources, not just strings.
“Europeana Data Model”
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Descriptive Metadata
Event-Centric Modelling
generic statement (level of EDM)
specific statements
“Europeana Data Model”
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Complex Objects
“Europeana Data Model”
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Double Hierarchy
“Europeana Data Model”
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Complete Double Hierarchy
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Proxies
Representing different metadata for a same object
allowing for different and possibly conflicting on one object
“views”, i.e. “context-specific” data
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Proxies
“Europeana Data Model”
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Proxies
“Europeana Data Model”
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Europeana
• Europeana is “just” a special provider
with processed/enriched metadata
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EuropeanaAggregation
Europeana
Aggregation
enriched metadata object page on Europeana portal
Europeana’s Proxy
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Archival Finding Aids
• „Encoded Archival Description“ (EAD)
• APEnet EAD
“Europeana Data Model”
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Visual
Representation
of a Finding Aid
of the Dutch
Nationaal Archief
“Europeana Data Model”
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Digitized Page of
an archival item
(which is
described in the
finding aid).
“Europeana Data Model”
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“Europeana Data Model”
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“Europeana Data Model”
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Summing up EDM constructs
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Classes for the “Core Pattern”
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Properties for the “Core Pattern”
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Classes for Contextual Entities
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Properties for Descriptive Metadata
(without most ESE/DC Properties)
Blue: simple object-centric description
Red: rich description of events, persons, etc
“Europeana Data Model”
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Properties for Relations
between provided CHO
“Europeana Data Model”
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Classes for
Context-Specific Metadata
“Europeana Data Model”
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Properties for
Context-Specific Metadata
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Current Status of EDM
• There will always be potential enhancements to EDM
• Important: we now have a stable version, so issues and new
features have quite clear bounds
• Confirmed feasibility in community workshops (Archives, Libraries, AudioVisual, Museums)
• Closely articulated with Danube requirement process
• First batches of EDM data
• Europeana Linked Data pilot (data.europeana.eu)
• Projects: MIMO, CARARE…
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ESE, EDM and Data Providers’
Duties & Benefits
• EDM is backwards compatible with ESE
• Object metadata described in ESE can be ingested and used in Europeana Danube release
• Direct conversion of object data to EDM has benefits
• Closer to original metadata
• Data can be contextualized, semantically linked to other data
• Allows for richer semantic query expansion & cross-collection browsing
“Europeana Data Model”
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Documentation
Main documentation:
• EDM Definitions
• EDM Primer
• EDM Mapping guidelines for data providers
http://pro.europeana.eu/edm-documentation
Other resources:
• EDM object templates & XML schema
http://europeanalabs.eu/wiki/EDMXMLSchema
• EDM OWL ontology
http://europeanalabs.eu/browser/europeana/trunk/ROOT/src/main/webapp/schemas/edm/rdf/
• ESE2EDM conversion for Europeana Linked Data pilot
http://europeanalabs.eu/wiki/EDMPrototypingTask15