Europeana and schema.org

Antoine Isaac

Dublin Core ConferenceSchema.org special session

5 September 2013

Europeana Data Model: an example

For a general presentation on Europeana and EDM rationale see http://pro.europeana.eu/edm-documentation

Provided Cultural Heritage Object (CHO) and descriptive metadata

Web Resources – digital representations

Aggregations – Bundling it all together

Why using schema.org?

Europeana tries to disseminate data to reach out to as many users as possible

Search engines

• Customization of result lists – rich snippets

• Knowledge Graph

• Search Engine Optimization

Developers more comfortable with parsing web pages

In fact: schema.org and RDFa

Europeana has been publishing structured metadata via its portal since a while

One application case: customization of public domain pages by Creative Commons, with details on the work and Europeana usage guidelines for public domain works

Europeana, Creative Commons and RDFa

http://www.europeana.eu/portal/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B.html

The Creative Commons Public Domain page triggers a script that harvests mark-up on the Europeana object page

Going further

Creative Commons uses 5-6 fields, Agreed upon with the developer(s) there

What to publish further?

Schema.org as a standardized form of more web page-based data exchange

And it has a case – several ones in fact

Still quite prototype-ish

Current EDM – schema.org mappingEDM element Schema.org mapping

ProvidedCHO & Proxy schema:CreativeWorkdc:contributor schema:contributordc:coveragedc:creator schema:creatordc:datedc:description schema:descriptiondc:formatdc:identifierdc:language schema:inLanguagedc:publisher schema:publisherdc:relationdc:rightsdc:sourcedc:subject schema:aboutdc:title schema:namedc:typedcterms:alternative schema:alternativeHeadlinedcterms:conformsTodcterms:created schema:dateCreateddcterms:extentdcterms:hasFormatdcterms:hasPartdcterms:hasVersiondcterms:isFormatOfdcterms:isPartOfdcterms:isReferencedBydcterms:isReplacedBydcterms:isRequiredBydcterms:issued schema:datePublisheddcterms:isVersionOfdcterms:mediumdcterms:provenancedcterms:references schema:mentionsdcterms:replacesdcterms:requiresdcterms:spatialdcterms:tableOfContentsdcterms:temporaledm:currentLocation schema:contentLocationedm:hasMetedm:hasType schema:additionalTypeedm:incorporatesedm:isDerivativeOfedm:isNextInSequenceedm:isRelatedToedm:isRepresentationOf schema:aboutedm:isSimilarToedm:isSuccessorOfedm:realizesedm:type N/Aedm:unstorededm:wasPresentAtedm:europeanaProxy N/Aedm:userTag schema:keywords or schema:comment edm:yearore:proxyFor N/Aore:proxyIn N/Aowl:sameAsrdf:type

Aggregation and EuropeanaAggregation

ore:aggregates N/A

edm:aggregatedCHO N/A

edm:country schema:addressCountry

edm:dataProvider schema:provider

edm:hasView schema:url

edm:isShownAt schema:url

edm:isShownBy schema:contentUrl

edm:landingPage schema:url

edm:language

edm:object schema:image, if preview opt-out is NOT activated

edm:preview schema:thumbnailUrl if preview opt-out is NOT activated

edm:provider schema:provider

dc:rights

edm:rights

edm:ugc

edm:unstored N/A

WebResource schema:WebPage or schema:MediaObject

schema:url

dc:description schema:description

dc:format

dc:rights

dc:source schema:encodesCreativeWork

dcterms:conformsTo

dcterms:created schema:dateCreated

dcterms:extent

dcterms:hasPart

dcterms:isFormatOf

dcterms:issued schema:datePublished

edm:isNextInSequence

edm:rights

Agent schema:Person or schema:Organization

skos:prefLabel schema:name

skos:altLabel skos:hiddenLabel schema:additionalName

skos:note schema:description

dc:date

dc:identifier

edm:begin

edm:end schema:deathdate

edm:hasMet schema:knows

edm:isRelatedTo

edm:wasPresentAt

foaf:name schema:name

rdaGr2:biographicalInformation schema:description

rdaGr2:dateOfBirth schema:birthdate

rdaGr2:dateOfDeath schema:deathdate

rdaGr2:dateOfEstablishment schema:foundingDate

rdaGr2:dateOfTermination

rdaGr2:gender schema:gender

rdaGr2:professionOrOccupation

schema:jobTitle

owl:sameAs

Place schema:Place

wgs84_pos:lat

wgs84_pos:long

wgs84_pos:alt

wgs84_pos:lat_long

skos:prefLabel schema:name

skos:altLabel skos:hiddenLabel schema:additionalName

skos:note schema:description

dcterms:hasPart

dcterms:isPartOf schema:containedIn

owl:sameAs

Current implementation

A glimpse of an object’s full data

http://www.europeana.eu/portal/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B.html?format=labels

Anatomy of results from an RDFa parser

http://www.w3.org/2012/pyRdfa/

Several flavors of data in it…

<http://www.europeana.eu/resolve/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B> a schema:CreativeWork; schema:name "Cofre de base rectangular com tampa de quatro face..."; schema:about "Cofre-relicário"; schema:addressCountry "Portugal"; schema:contentUrl <http://www.matriznet.imc-ip.pt/MatrizNet/CommonServices/ThumbnailDownloader.axd?IdReg=5113&TipoReg=1&ThumbnailType=2>; schema:creator "Desconhecido"; schema:description "Cofre de base rectangular com tampa de quatro faces. A urna é decorada com um friso perlado que rodeia representações da Virgem com o Menino, do Calvário e da Virgem em Glória, nas quatro faces. As arestas da tampa são emolduradas por pequenas caneluras; nas duas faces principais um entrelaçado encerra uma arcaria polilobada."; schema:image <http://www.matriznet.imc-ip.pt/MatrizNet/CommonServices/ThumbnailDownloader.axd?IdReg=5113&TipoReg=1&ThumbnailType=1>;schema:provider "Instituto dos Museus e da Conservação", "Museu de Alberto Sampaio"; schema:url <http://www.europeana.eu/portal/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B.html>, <http://www.matriznet.imc-ip.pt/MatrizNet/Objectos/ObjectosConsultar.aspx?IdReg=5113>;

Schema.org data

dc11:creator "Desconhecido"; dc11:date "XIII"; dc11:description "Cofre de base rectangular com tampa de quatro faces. […]."; dc11:format "Altura: 9,5 cm; Profundidade: 10 cm; Comprimento: 19,5 cm"; dc11:identifier "MAS O 37"; dc11:rights "Copyright © Instituto dos Museus e da Conservação"; dc11:subject "Cofre-relicário"; dc11:title "Cofre de base rectangular com tampa de quatro face..."; dc11:type "Ourivesaria"; edm:country "Portugal"; edm:rights <http://creativecommons.org/publicdomain/mark/1.0/>; edm:dataProvider "Museu de Alberto Sampaio"; edm:provider "Instituto dos Museus e da Conservação"; edm:isShownAt <http://www.matriznet.imc-ip.pt/MatrizNet/Objectos/ObjectosConsultar.aspx?IdReg=5113>; edm:isShownBy <http://www.matriznet.imc-ip.pt/MatrizNet/CommonServices/ThumbnailDownloader.axd?IdReg=5113&TipoReg=1&ThumbnailType=2>; edm:landingPage <http://www.europeana.eu/portal/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B.html>; edm:object <http://www.matriznet.imc-ip.pt/MatrizNet/CommonServices/ThumbnailDownloader.axd?IdReg=5113&TipoReg=1&ThumbnailType=1>;

DC / EDM data

og:description "Cofre de base rectangular com tampa de quatro faces. A urna é decorada […]"; og:image "http://europeanastatic.eu/api/image?type=IMAGE&uri=http://www.matriznet.imc-ip.pt/MatrizNet/CommonServices/ThumbnailDownloader.axd?IdReg=5113&TipoReg=1&ThumbnailType=1&size=FULL_DOC"; og:site_name "Europeana"; og:title "Cofre de base rectangular com tampa de quatro face... | Desconhecido"; og:type "website"; og:url "http://preview.europeana.eu/portal/record/02001/492A0518CA2BDF09B1642B11FA7317F5FE43B96B.html” .

FB OpenGraph data

xhv:license <http://creativecommons.org/publicdomain/mark/1.0/>; cc:attributionURL <http://www.matriznet.imc-ip.pt/MatrizNet/Objectos/ObjectosConsultar.aspx?IdReg=5113>; cc:morePermissions <http://www.matriznet.imc-ip.pt/MatrizNet/Objectos/ObjectosConsultar.aspx?IdReg=5113>; cc:useGuidelines <http://www.europeana.eu/rights/pd-usage-guide/>;

Creative Commons data

Observations

• Schema.org is simple

• Not everything can be mapped

• We’re losing grain, including some of the core benefits of Europeana moving to the richer EDM!

• But it’s ok, because it matches needs

• And in fact it’s not entirely because of Schema.org

• And we can publish different flavors of the data in RDFa

Thank you!

Questions?

aisaac@few.vu.nl

Antoine Isaac