The document discusses the Deutsche Nationalbibliografie (German National Bibliography) publishing their data as linked open data. This allows others to access and reuse the high quality library data. By linking the data to other sources using identifiers, it becomes easier to extract relevant subsets and builds on properties of completeness, currentness, and persistence needed for a national bibliography in the digital age. The DNB has published around 70% of its data as linked open data.

1. Jürgen Kett, Sarah Beyer, Mathias Manecke, Yvonne
Jahns, and Lars G. Svensson
The Deutsche Nationalbibliografie as
linked open data:
Applications and opportunities
WLIC 2012 Session 215: What is a national bibliography today?
1 | 27 | Deutsche Nationalbibliografie als Linked Open Data | August 16, 2012

2. The world is going digital and many
organisations use this as an opportunity
to optimise their data curation
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3. Everyone here knows that libraries have
high-quality data of interest to many
Photo by Beatrice Murch: http://flickr.com/photos/blmurch/465623933/
other organisations
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4. It is difficult for non-libraries to access
and re-use library data
MARC
?
Z39.50
?
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5. Library data should be an integral part
of the WWW
6

6. In the DNB, we decided to publish the
national bibliography as linked open
data
Dewey DDC
(German) VIAF
.info
Wikipedia
Phononet BL
ISBN DNB-Titles
ISSN LCSH
MVB ISMN
GND
ZDB-Titel RAMEAU
Other DNB-
suppliers Items
WorldCat- urn:nbn:de
Titles
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7. Requirements of a national bibliography in
the 21st century must measure themselves
on data use and re-use in the WWW
9

8. Users of a national bibliography build on
four basic properties
– Data completeness and reliability
– Data currentness
– Referentiability
– Persistence
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9. The WWW increasingly mutates to an
open space for data exchange which is
Photo by schoeband (CC BY-NC-ND: http://www.flickr.com/photos/schoeband/4401225347/sizes/l/in/photostream/
(almost) impossible to control
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10. 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
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11. 14
be a graph in the WWW
In Future, the national bibliography will
Picture by Beercha CC BY: http://www.flickr.com/photos/vendene/4285542155/sizes/m/in/photostream/

12. The boundaries of a national bibliography
are hard to define
15

13. The national bibliography will
increasingly depend on data not curated
by the national library
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14. The road to WWW integration goes
through linked open data
http://richard.cyganiak.de/2007/10/lod/lod-datasets_2011-09-19_colored.png
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15. The DNB publishes ~70% of its data as
linked open data
ZDB
GND Music
Exile
Titles collec-
19
tion

16. The national bibliography is seen as
subset of the catalogue and is accessible
over the same user interface
20

17. A range of services are available to
access that data
Reading room Online Catalogue
Reference and Printed or PDF Version of National
archival Bibliography
service Printed Title Cards
Uniform Resource Name: URN Service
Search and Retrieve and Update (SRU)
Data APIs and Open Archive Initiative (OAI)
self service Linked Data-Linking
Datashop /RSS-Feed
Current updates of National
Database: Data Bibliography and new release service
preparation and Authority Data Dumps and update service
data dumps Dump of complete Data in Linked Data
RDFxml
21 Special selections

18. A coherent indexing policy with
controlled access points make it easier
to extract relevant data sets
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19. Library data tends to be hard to access
Picture ny Ed Brydon: http://www.flickr.com/photos/edbrydon/4073144654/sizes/l/in/photostream/
and re-use while it really should be an
integral part of the WWW
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20. In the DNB, we decided to solve this by
publishing the national bibliography as
linked open data
Dewey DDC
(German) VIAF
.info
Wikipedia
Phononet BL
ISBN DNB-Titles
ISSN LCSH
MVB ISMN
GND
ZDB-Titel RAMEAU
DNB-
Items
WorldCat- urn:nbn:de
25
Titles

21. We do this because we firmly believe
that this data is useful to others and we
http://www.gedankenkonsum.de/wp-content/uploads/2011/03/the-future.jpg
encourage anyone to use it
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22. Linked open bibliographies: Where
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Callimachos meets Tim Berners-Lee
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