EDM Europeana Data Model Guus Schreiber with input from Carlo Meghini, Antoine Isaac, Stefan Gradmann, Maxx Dekkers et al. from Europeana V1.

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Presentation transcript:

EDM Europeana Data Model Guus Schreiber with input from Carlo Meghini, Antoine Isaac, Stefan Gradmann, Maxx Dekkers et al. from Europeana V1

Background reading EDM Primer

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

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” !

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!

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

Dublin Core EDM uses the latest version of DCMI Metadata Terms Specified with an RDF model Specialization of 15 original DC elements dcterms:coverage dcterms:spatial dcterms:temporal Can be specialized itself see requirement

SKOS: vocabulary publication on the Web W3C standard Adopted by large institutions such as Library of Congress Specified with an RDF model Can be specialized itself

OAI ORE Open Archives Initiative Object Reuse & Exchange Specification: 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 object as viewed in a metadata record

The Example

The Example

Aggregation organizes data of a provider 12 aggregation digital representation object provenance metadata

Proxy: metadata record for an object 13 proxy object metadata

Multiple aggregations = multiple providers 14 aggregation of DMF aggregation of Louvre

Europeana is “just” a special provider with processed/enriched metadata 15 Europeana aggregation enriched metadata landing page

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