VOCABULARY USAGE IN

DATOS.BNE.ESDaniel Vila-Suero

REUSE AS MUCH AS POSSIBLEMaximize the coverage of mappings from MARC 21 to RDF

6 CLASSES

14 OBJECT PROPERTIES

>200 DATATYPE PROPERTIES

FROM MORE THAN 10 DIFFERENT VOCABULARIES

String

MAPPINGS ARE PUBLICLY AVAILABLEhttp://bne.linkeddata.es/mapping-marc21

BE PRAGMATIC

DCMI ElementsDCMI TermsIFLA FRAD

IFLA FRBRerIFLA FRSAD

IFLA ISBD ElementsMADS/RDF

RDA Group 2 ElementsRDA Relationships for WEMI

SKOS...

WHAT IS THE CORE DATA MODEL ?IFLA FRBR

Ok, and how does the data look?

frbr :Person frbr :Work

frbr :Expressionfrbr :CorporateBody

frbr :Manifestation

skos:Concept

Group 2 Group 1 Group 3

Don Quijote de la ManchaFrench manifestations

(213)

Novelas EjemplaresSpanish manifestations

(303)

Don Quijote de la ManchaSpanish manifestations

(840)

Don Quijote de la ManchaEnglish manifestations

(247)

Don Quijote de la Manchafrbr:Work

Miguel de Cervantes

Don Quijote de la ManchaGerman manifestations

(49)

EntremesesSpanish manifestations

(86)

frbr:Work frbr:isEmbodiedIn frbr:Expression

frbr:Expression frbr:IsManifestedBy frbr:Manifestation

frbr:Person frbr:isCreatorOf frbr:Work

( ) Number of resources

WHY THIS?

frbr :Person

frbr :Work

frbr :Expression

frbr :Manifestation

AND NOT THIS?

Person

Bib. resource

1. Nº OF AUTHORITY RECORDS

0

500.000

1.000.000

1.500.000

2.000.000

frbr :Work frbr :Person frbr :Expression

Nº of records

frbr :Work frbr :Person frbr :Expression

2. CLUSTERING OF RESOURCES IS EXPLICIT IN THE DATA (AND THE MODEL)

Manifestations

Person

Works

Expressions

++ NAVIGATIONhttp://bne.linkeddata.es

3. LINKS TO OTHER DATASETSAlso at Work and Expression levels

(VIAF, idRef, etc.)

LINKS TO EXTERNAL DATASETSAlso at the Work and Expression level

(VIAF, idRef, etc.)

bne:XX3383563

viaf:184295284

SOME CLICKS AFTERThe user can access the “curated and reliable” cluster of editions

of Don Quijote de la Mancha in Italian

SOME ISSUES

• Pure FRBR representation not always possibledct:subject, dct:language at Manifestation level instead of Work level

• Around 30% of bibliographic records still not connected to their Expression

• Manifestations are mostly described with strings, not many links

• Does the modelling seem to complex to people outside the library community?

NEXT STEP

Data portalAPIs

MARC 21, XML, metadata schemas

BNE Knowledge Graph(RDF with rich data model)

For humansand machines (schema.org)

For developersJSON(LD)

LDP, LD API

SPARQLHTTP

RICH

POOR?

MORE INFO AT

• http://datos.bne.es

• “datos.bne.es: A library linked dataset”. Vila-Suero et al., Semantic Web Journal 2013

• “datos.bne.es and MARiMbA: An insight into Library Linked Data”. Vila-Suero and Gómez-Pérez. Library Hi-tech, to appear

2013

THANK YOU VERY MUCHdvila@fi.upm, @dvilasuero