"Bibliographic Services" data service
The German National Library offers the following ongoing and retrospective datasets in machine-readable formats via WWW or FTP:
The records are supplied in MARC 21, MARC21-xml, RDF (several serialisations) (not available for all data) and DNB Casual (for bibliographic data only) formats. Descriptive cataloguing of bibliographic data based on the "Resource Description and Access" (RDA) standard started on 1 October 2015 at the German National Library.
The provision of data via WWW or FTP is subject to fees. A contract must be entered into in order to obtain records.
The records are provided as available, with no guarantee to its being continuous, punctual, error-free or complete, or to its not infringing the rights of third parties (e.g. personal rights and copyright).
Complete deliveries under CC0 1.0 license
The following records are available free of charge under a CC0 1.0 license (see Terms of purchase and use). Since the end of January 2014, some geographic authority data contains unchanged coordinates from the GeoNames database. Since October 2015, some bibliographic data contains subject classes from Thema, a subject category scheme for a global book trade.
Most of the ZDB (available in German only) holdings records can also be re-used free of charge. The actual license status is indicated in the records themselves.
|Full copy |
(updated: October 2017)
|Provision (update)||Format, offered in |
|Number of records / size of data (zipped)|
|DNB bibliographic records* ||February, June, October||MARC 21||approx. 16.7 million / approx. 4.1 GB|
|Bibliographic records of the |
|February||MARC 21||approx. 10.7 million / approx. 3.9 GB|
|DNB bibliographic records* **||February, June, October||RDF (RDF/XML), |
|approx. 14.7 million / approx. 1.8 GB|
|Integrated Authority File (GND)||February, June, October||MARC 21||approx. 14.1 million / approx. 1.5 GB|
|RDF (RDF/XML), |
|approx.14.1 million / approx. 1.2 GB|
|ZDB bibliographic records||March and September||MARC 21||approx. 1.8 million / approx. 508 MB|
|approx. 1.8 million / approx. 198 MB|
|ZDB holdings records||March and September||MARC 21||approx. 16.1 million / approx. 1.2 GB|
|Address data of the German ISIL and |
Library Code Agency
|March and September||RDF (RDF/XML),|
|approx. 16,592 / approx. 2.6 MB|
* Including records which are not a part of the Deutsche Nationalbibliografie.
** Limited to bibliographic records for which a RDF version is available.
Please mail Data Services for the relevant log-in data to obtain a complete delivery in MARC 21 or MARC21-xml format.
The basic data holdings of the bibliographic records of the DNB and the ZDB plus the Integrated Authority File (GND) are available for download free of charge in RDF (RDF/XML), RDF (Turtle) and RDF (JSON-LD) serialization under CC0 1.0 licence as part of the Linked Data Service.
New developments regarding data services and information on format changes
The data is updated via the free OAI interface (only XML variant) or for the GND and bibliographic records and holdings of ZDB via the weekly update service and through charged installments from the WWW or SFTP server (MARC 21 and XML variant).
Download of individual data records
Individual data records may also be obtained:
- via SRU-Interface
- via the Data Shop (available in German only)
- via ISBN selection (on the basis of a structured ISBN list)
Further processing of metadata
To start with further processing of the metadata the software MarcEdit, d:swarm, the Metafacture or Catmandu software suites offer suitable solutions. For data analytics the "Konstanz Information Miner" (KNIME) or the Metadata Quality Assurance Framework might be usefull. More information on the sildes of "Open Source Software zur Verarbeitung und Analyse von Metadaten".
Last update: 20.10.2017