Entitifying Europeana: Building an ecosystem of networked references - - PowerPoint PPT Presentation

Entitifying Europeana: Building an ecosystem of networked references for Cultural Objects

Hugo Manguinhas, Valentine Charles, Antoine Isaac, Tim Hill|

Eur uropeana na F Found undat ion

What at is European ana? a?

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We aggregate metadata:

• From all E

U countries

• ~3,500 galleries, libraries,

archives and museums

• More than 53M objects
• In about 50 languages
• Huge amount of references to

places, agents, concepts, time

Eur uropeana na aggregat ion n inf nfrast ruc uct ur ure Europeana| | CC BY-SA

The Platform for E urope’s Digital Cultural Heritage

SWIB16 16 - Ent nt it ifying ng Eur uropeana na: Bui uilding ng an n ecosyst em of ne net worked referenc nces for Cul ult ur ural Object s

European ana a Linked Dat at a a St rat at egy

Our e efforts and l lines of

• f w

wor

• rk

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• Europeana Data Model (EDM) offers a base for linking data
• We apply automatic enrichment to link source data to reference

data

• We encourage data providers to contribute their own

vocabularies so that we can benefit from data links made at data providers’ level

• We encourage alignment activities between domain

vocabularies

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Significant progress have been made, most of it presented in past SWIB!

European ana a Linked Dat at a a St rat at egy

A strategy f for E Entities

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As a cornerstone for our strategy we are building an "Entity Collection"

• A service that acts as a centralized point of reference and

access to data about contextual entities

• Caching and curating data from the wider Linked Open Data

cloud

• A sort of Europeana "knowledge graph"

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European ana a Linked Dat at a a St rat at egy

Motiv ivatio ion

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• Improve user experience
• S

upport better ways of searching and navigating through the collections, eliminating ambiguity and clarifying the meaning of descriptions

• Adapt better to the language of the user
• by improving the interlinking of data
• Brings more context to the objects
• Alleviates polysemy issues
• E

xpands language coverage

• Contributes to build a web of data ('knowledge graph') that

third parties can use to improve their users' experience

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The E Ent it it y Colle llect io ion

Use C Cases

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Europeana Collections Portal

• Findability: users can look for entities, not
• nly records (Entity-Based Search)
• Understandability: Entity Pages group and

present all assertions about an entity

• Exploration: Navigation along relationships

becomes possible

Crowdsourcing

• Objects can be annotated with references to

entities

• A controlled vocabulary for client applications

Enrichment of Provider’s Data

• A controlled vocabulary to help identify

named references to entities

Republication for Re-use

• Entities can be republished as an open

source to the community

Entity Collection

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The E Ent it it y Colle llect io ion

What c can it e enable?

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Semantic auto- completion Semantic and Metadata annotations Entity Pages Entity based facets

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Google Knowledge Card Pundit Annotation Client Food & Drink Project

The E Ent it it y Colle llect io ion

How d do we choos

• se o
• ur t

target v vocabularies?

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As defined in the recent E uropeana Tech Task Force on enrichment and evaluation (presented last year), we consider the following criteria when selecting a vocabulary:

• Properly documented and supported by a community
• Technically available on the web according to the Linked Data best

practices and recipes

• Available under an open licence
• Multilingual
• Abide to a minimal ontological commitment principle
• Apply the best practices and standards for the representation, structure

and description of vocabularies

• Well-connected internally and externally to other vocabularies (preferably

spine vocabularies)

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The E Ent it it y Colle llect io ion

Which target vocabularies are w we u using?

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For historical reasons, the target vocabularies correspond to the ones being used for S emantic E nrichment (as of November 2016):

• Places

a subset of Ge Geonames, corresponding to places which are part of E uropean countries and of some specific feature classes.

• Agents

a subset of DBp Bpedia corresponding to most of the instances of dbp:Artist with some exceptions, and integrated from 49 DBpedia language editions.

• Concepts

a subset of DBp Bpedia corresponding to a handful of concepts matching the needs from E uropeana Collections.

• Time S

pans

The chronological periods from Semi miumT mTime me.

214,307

resources

274

resources

165,008

resources

2,566

resources

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The E Ent it it y Colle llect io ion

Cont ntribut ution t n to mul ultilingua ual c coverage

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Entities effectively used to enrich Europeana Objects Entities present in the Entity Collection

The E Ent it it y Colle llect io ion

Are t these target vocabularies es en enough?

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• Not enough coreferencing information to other vocabularies
• particularly to the ones we receive from data providers (e.g.

musical instruments, MIMO)

• Labels and values are not always accurate and normalized
• need for better reference data (e.g. VIAF)
• Missing relevant information
• e.g. roles and professions
• Need to expand coverage to other types of entities
• namely Works and E

vents

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The E Ent it it y Colle llect io ion

Challenges

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Investigate and design strategies for:

• Integrating new vocabularies that can further improve
• entity descriptions and multilingual coverage (e.g. VIAF)
• linking between entities (e.g. Wikidata)
• Integrating alignments, in particular:
• links between local/domain vocabularies to pivot vocabularies
• S

upporting manual curation of existing and new entities

• Keeping up-to-date the information collected from external sources

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The E Ent it it y Colle llect io ion

Our r roadmap f for t the next y years

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• Mint E

uropeana UR Is for E ntities and update internal references

• Make entity services and data available via an API
• Make use of the API in the Collections Portal
• Implement support for new vocabularies and entity types

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✔ ✔

The E Ent it it y Colle llect io ion

Alpha r relea ease of our n new Entity API

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More methods will come, for:

Creation, Update and Delete; UR I resolution to E uropeana E ntities

The E Ent it it y Colle llect io ion

DBpedia resource for “ “Mozart” i in o

• ur d

data

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Coreference links to 6 other datasets

(e.g. Freebase, Wikidata)

Inter-linking information… still need to switch references to link to Europeana Entities Preferred labels for 48 languages

The E Ent it it y Colle llect io ion

Entity A API - suggest m method

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/entity/suggest.json?text=neo&lang=en&rows=6

Con

• nclusion
• n

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• A S

trategy for E ntities is a “must” for E uropeana

• There is no “one fits all” vocabulary
• We have a long way to go…

...but we are making progress

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Thank you!

hugo.manguinhas@europeana.eu