Meghini - Europeana Data Model @EUscreen Mykonos
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Transcript of Meghini - Europeana Data Model @EUscreen Mykonos
A look at the Europeana Data Model
Carlo Meghini, Stefan Gradmann, Antoine Isaac
EUScreen Workshop on Metadata
Mykonos, June 24, 2010
Rationale
• Rich functionality (semantic search) requires rich representations
• Rich representations exists: collect them (1) • Interoperability is the problem:
• models: connect (2) • values: normalize (3)
• Multilingualism cuts across • Need a lot of knowledge: link (4)
Mykonos, June 24, 2010 2 EUScreen Workshop on Metadata
Tools
• Collect existing metadata as they are: OAI ORE • Connect classes and properties: basic ontology
(CIDOC CRM, DC, SKOS, VRA) + mappings • Web architecture, in particular URIs • Link metadata to existing resources
• Linked Open Data
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History
• ESE • quickly set up prototypes • keep barriers low • build on Dublin Core • Rhine based on ESE V3.2
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EDM development
• version 1: initial surrogate model with rich set of contextualization properties
• version 2: OAI-ORE aggregations and SKOS concepts
• release 2: 1st Europeana plenary • version 3 • version 4: IRW ontology
• release 1: December 2009 • release 2: February 2009
• version 5: integration of ESE, evaluation through domain meetings
• release 1: April 2010 • release 2: next week
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The general picture
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The class taxonomy
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Property taxonomy (without ESE properties)
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The Example - 1
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The Example - 2
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Providing an aggregation of digital resources for a cultural object
RDF graph with specific conventions for resource types and sub-properties
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Has View
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Modeling Mona Lisa
• There’s a resource that stands for Mona Lisa as an object in Museum
• Ideally identified by a URI assigned by Direction des musées de France • classified using a DMF ontology • But DMF has a specific description for that object
• Other institutions might have a different one!
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So we create Proxies
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Becomes really handy when there are several records for a same object
Berlin, Jan. 25-26, 2010
15 Europeana Librarian Community Meeting20100324
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And there are always several information providers: think of Europeana!
Berlin, Jan. 25-26, 2010
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Landing Page
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Back to proxies: don’t look at that!
Berlin, Jan. 25-26, 2010
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Remember: one provider may not need to submit data for everything
Europeana should take care of maintaining the whole structure
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Now for metadata describing the object
• EDM is flexible • Common, simple object-centric approaches • More sophisticated event-aware approaches • In fact, any approach?
• Crucial principle: mapping • Keep original metadata • Map to more general interoperability level
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Contextualization property taxonomy
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hasMet/isAbout with simple values
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hasMet/isAbout & fully-fledged contextualization
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Reminder: classes for context entities
Who, what, when, where
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Enabling event-aware descriptions: Was Present At, Happened At, Occurred At
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Amphora of Tuthmosis III
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Advanced EDM
• Relations between “provided” objects • Part-whole links for complex objects • Derivation and versioning relations
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Has Part
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Properties for Versioning & Derivating
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Is Representation Of
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More information
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• EDM Specification • EDM Primer
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Thank you!
• Questions
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