| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 20121

The Deutsche Nationalbibliografie as linked open data: Applications and opportunitiesWLIC 2012 Session 215: What is a national bibliography today?

Jürgen Kett, Sarah Beyer, Mathias Manecke, Yvonne Jahns, and Lars G. Svensson

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 20123

The world is going digital and many organisations use this as an opportunity to optimise their data curation

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Everyone here knows that libraries have high-quality data of interest to many other organisations

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It is difficult for non-libraries to access and re-use library data

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 20125

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Library data should be an integral part of the WWW

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In the DNB, we decided to publish the national bibliography as linked open data

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 20127

DDC(German)

DNB-Items

DNB-Titles

BLWikipedia

GND

LCSH

VIAF

ISBNISSNISMN

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Dewey.info

WorldCat-Titles

RAMEAU

urn:nbn:de

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Phononet

Othersuppliers

Requirements of a national bibliography in the 21st century must measure themselves on data use and re-use in the WWW

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Users of a national bibliography build on four basic properties

– Data completeness and reliability– Data currentness– Referentiability– Persistence

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201210

The WWW increasingly mutates to an open space for data exchange which is (almost) impossible to control

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201211

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The consequences of this are manifold

We will never know if we have collected all relevant publications

There will be much machine-generated metadata (bad, but not useless)

Semantic interoperability will be more important than adherence to cataloguing rules

We will need to version metadata

We will need worldwide unique persistent identifiers for (electronic) publications and for authority records

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201212

In Future, the national bibliography will be a graph in the WWW

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The boundaries of a national bibliography are hard to define

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| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201216

The national bibliography will increasingly depend on data not curated by the national library

The road to WWW integration goes through linked open data

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201217

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The DNB publishes ~70% of its data as linked open data

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The national bibliography is seen as subset of the catalogue and is accessible over the same user interface

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A range of services are available to access that data

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Reference and archival service

Database: Data preparation and

data dumps

Reading room

Data APIs and self service

Current updates of National Bibliography and new release serviceAuthority Data Dumps and update serviceDump of complete Data in Linked Data RDFxmlSpecial selections

Search and Retrieve and Update (SRU)Open Archive Initiative (OAI)Linked Data-LinkingDatashop /RSS-Feed

Online Catalogue

Printed or PDF Version of National BibliographyPrinted Title CardsUniform Resource Name: URN Service

A coherent indexing policy with controlled access points make it easier to extract relevant data sets

| 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 201222

Library data tends to be hard to access and re-use while it really should be an integral part of the WWW

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In the DNB, we decided to solve this by publishing the national bibliography as linked open data

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DNB-Items

DNB-Titles

BLWikipedia

GND

LCSH

VIAF

ISBNISSNISMN

ZDB-Titel

Dewey.info

WorldCat-Titles

RAMEAU

urn:nbn:de

MVB

Phononet

We do this because we firmly believe that this data is useful to others and we encourage anyone to use it

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Linked open bibliographies: Where Callimachos meets Tim Berners-Lee

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