LOAD–Linked Open Antipodal Data

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LOAD – Linked Open Antipodal DataA brief overview of the Linked Data activities in the

German National Library

Lars G. Svensson

When someone searches for information, the first place they visit usually isn‘t the library

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The data librarians create could help making search better

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There it is!

WOW!

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Outside of libraries, our data formats are not readily understood

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MARC 21

MAB 2

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Ideally, it should be easy for other service providers to re-use library data

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Library data

Otherdata

Somedata

Linked Library Data could be a good way to start

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The German National Library has much data

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Books SerialsArchival records

Sound carriers

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The data is a by-product of our collection mandate

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[…] entrusted with the task of collecting, permanently archiving, bibliographically classifying and making available to the general public all German and German-language publications from 1913, foreign publications about Germany, translations of German works, and the works of German-speaking emigrants published abroad between 1933 and 1945.[…]

The immediate output of the daily work is title data

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The title data is supported by authority data from the GND

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GND

PND SWD GKD EST

Increasingly, we make digital full texts available

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We began with Linked Data in 2010 in order to reach out to non-library communities

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Let‘s see: Who is out

there?

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The authority data seems to be the most interesting dataset

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Use cases for title data is still work-in-progress

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1806 fiel Frankfurt unter die Herrschaft des Fürstprimas Karl Theodor von Dalberg, der es mit seinen Fürstentümern Regensburg und Aschaffenburg zu einem selbständigen Staat innerhalb des Rheinbunds vereinigte.

http://d-nb.info/gnd/2033949-5

http://d-nb.info/gnd/2031951-4

http://d-nb.info/gnd/118720961

http://d-nb.info/gnd/2005153-0

http://d-nb.info/gnd/2028282-5Frankfurt am Main oder Frankfurt/Oder?

A third field are ontologies structuring the data

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gndo:Differentiated

Person

gnd:118584596

Wolfgang Amadeus Mozart

Franz Xaver Wolfgang

Mozart

agrelon:hasChild

gnd:119176653

rdf:type

http://d-nb.info/standards/elementset/gndhttp://d-nb.info/standards/elementset/agrelon

In order to encourage re-use, (almost) all metadata is available under CC0

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RDFCSV

MARC>2 years<2 years

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We aim to link our data to as many other datasets as possible

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DNB

LCSH

DeweyYou!

Agrovoc

Wiki-pedia

RAMEAU

VIAF

Much link-creation is still done manually

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#FORMAT: BEACON#PREFIX: http://d-nb.info/gnd/ #TARGET: http://cgi-host.uni-marburg.de/~omgesa/gs/xs1.php?f1=pnd&s1={ID}#FEED: http://www.online.uni-marburg.de/fpmr/pnd.txt #CONTACT: Jörg Witzel joerg.witzel@staff.uni-marburg.de#INSTITUTION: Forschungsstelle für Personalschriften#NAME: Gesamtkatalog deutschsprachiger Leichenpredigten (GESA)#MESSAGE: Leichenpredigten 1550-1800 (GESA) #TIMESTAMP: 2012-08-09100000193|3100006353|9100009271|3100017061|9100017495|1100018335|8100019552|5100021549|3100029752|199100030378|7100031307|3100031358|22100031900|27100033709|2100033970|7100036422|1100039596|4100043542|1100044921|1100046770|6

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We develop the platform Culturegraph to create links algorithmically

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<owl:AnnotationProperty rdf:about="http://d-nb.info/standards/elementset/gnd#marc21equivalent"><rdfs:label xml:lang="de">MARC 21 Entsprechung</rdfs:label><rdfs:label xml:lang="en">MARC 21 equivalent</rdfs:label><rdfs:comment xml:lang="de">Gibt die MARC 21 Entsprechung des Elements im GND-MARC-Format wieder.</rdfs:comment> <rdfs:comment xml:lang="en">Expresses the MARC 21 equivalent for this element in the GND MARC format.</rdfs:comment></owl:AnnotationProperty>

@prefix void: <http://rdfs.org/ns/void#> .@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .@prefix owl: <http://www.w3.org/2002/07/owl#> .@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .@prefix dcterms: <http://purl.org/dc/terms/> .@prefix foaf: <http://xmlns.com/foaf/0.1/> .

<mx:datafield tag="153" ind2=" " ind1=" "><mx:subfield code="a">220.531</mx:subfield><mx:subfield code="y">1</mx:subfield><mx:subfield code="a">7</mx:subfield><mx:subfield code="e">220.531</mx:subfield><mx:subfield code="j">Paraphrasen</mx:subfield><mx:subfield code="9">ess=ren</mx:subfield></mx:datafield></mx:record>

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120 Million records connected through five algorithms

CulturegraphAuthorities shall be a gateway service to entities in the GND

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?culturegraph.org

!

GND

Hidden relations

Missing links

Duplicates Missing back-links

Many other European libraries and CH portals are active with Linked Data, too

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The Swedish National Library deserves a honourable mention

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The BnF uses Linked Data to build services for smaller libraries

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The BnF uses Linked Data to build services for smaller libraries

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BL and DNB together prototype a network of interlinked national bibliographies

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So does Linked Data really help to navigate the Semantic Web?

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People outside of libraries can benefit from our data but find it hard to understand the data formats

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Linked Library Data could be a good compromise

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By creating more links between libraries, we can create a critical mass of data and head towards the bibliographical future

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The Giant Global Graph: Where Kallimachos meets Tim Berners-Lee

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Literature about DNB Linked Data Service:

The Deutsche Nationalbibliografie as linked open data : applications and opportunities ; World Library and Information Congress: 78th General Conference and Assembly, IFLA 2012, Helsinki / Jürgen Kett ; Sarah Beyer ; Mathias Manecke ; Yvonne Jahns ; Lars G. Svensson. urn:nbn:de:101-2012052306

Licensing Library and Authority Data Under CC0: The DNB Experience / Lars Svensson. http://www.w3.org/2013/04/odw/odw13_submission_57.pdf

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