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

Mykonos, June 24, 2010 3 EUScreen Workshop on Metadata

History

• ESE •  quickly set up prototypes •  keep barriers low •  build on Dublin Core •  Rhine based on ESE V3.2

Mykonos, June 24, 2010 4 EUScreen Workshop on Metadata

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

5 EUScreen Workshop on Metadata Mykonos, June 24, 2010

The general picture

6 Mykonos, June 24, 2010 6 EUScreen Workshop on Metadata

The class taxonomy

7 Mykonos, June 24, 2010 7 EUScreen Workshop on Metadata

Property taxonomy (without ESE properties)

Mykonos, June 24, 2010 8 EUScreen Workshop on Metadata

The Example - 1

9 Mykonos, June 24, 2010 9 EUScreen Workshop on Metadata

The Example - 2

Mykonos, June 24, 2010 10 EUScreen Workshop on Metadata

Providing an aggregation of digital resources for a cultural object

RDF graph with specific conventions for resource types and sub-properties

Mykonos, June 24, 2010 11 EUScreen Workshop on Metadata

Has View

Mykonos, June 24, 2010 12 EUScreen Workshop on Metadata

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!

Mykonos, June 24, 2010 13 EUScreen Workshop on Metadata

So we create Proxies

Mykonos, June 24, 2010 14 EUScreen Workshop on Metadata

Becomes really handy when there are several records for a same object

Berlin, Jan. 25-26, 2010

15 Europeana Librarian Community Meeting20100324

Mykonos, June 24, 2010 15 EUScreen Workshop on Metadata

And there are always several information providers: think of Europeana!

Berlin, Jan. 25-26, 2010

16 Mykonos, June 24, 2010 16 EUScreen Workshop on Metadata

Landing Page

Mykonos, June 24, 2010 17 EUScreen Workshop on Metadata

Back to proxies: don’t look at that!

Berlin, Jan. 25-26, 2010

18 Mykonos, June 24, 2010 18 EUScreen Workshop on Metadata

Remember: one provider may not need to submit data for everything

Europeana should take care of maintaining the whole structure

Mykonos, June 24, 2010 19 EUScreen Workshop on Metadata

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

Mykonos, June 24, 2010 20 EUScreen Workshop on Metadata

Contextualization property taxonomy

Mykonos, June 24, 2010 21 EUScreen Workshop on Metadata

hasMet/isAbout with simple values

22 Mykonos, June 24, 2010 22 EUScreen Workshop on Metadata

hasMet/isAbout & fully-fledged contextualization

Mykonos, June 24, 2010 23 EUScreen Workshop on Metadata

Reminder: classes for context entities

Who, what, when, where

Mykonos, June 24, 2010 24 EUScreen Workshop on Metadata

Enabling event-aware descriptions: Was Present At, Happened At, Occurred At

Mykonos, June 24, 2010 25 EUScreen Workshop on Metadata

Mykonos, June 24, 2010 26 EUScreen Workshop on Metadata

Amphora of Tuthmosis III

27 Mykonos, June 24, 2010 27 EUScreen Workshop on Metadata

Advanced EDM

• Relations between “provided” objects •  Part-whole links for complex objects •  Derivation and versioning relations

Mykonos, June 24, 2010 28 EUScreen Workshop on Metadata

Has Part

Mykonos, June 24, 2010 29 EUScreen Workshop on Metadata

Properties for Versioning & Derivating

Mykonos, June 24, 2010 30 EUScreen Workshop on Metadata

Is Representation Of

31 Mykonos, June 24, 2010 31 EUScreen Workshop on Metadata

More information

32

•  EDM Specification •  EDM Primer

Mykonos, June 24, 2010 32 EUScreen Workshop on Metadata

Thank you!

• Questions

Mykonos, June 24, 2010 33 EUScreen Workshop on Metadata