DOI

Digital Object Identifier (DOI)
DOIs provide persistent links to scholarly content, helping users get to the authoritative, published version of the content they are searching for, even when the content changes location or ownership. With about 35 Million registered DOI for publications (2009), the system is established and consequently used by scientific publishers and organisations.

Through the project STD-DOI, the Technical Information Library (TIB) in Hannover was established as an agency for data DOI. PANGAEA among four data providers was the first system using DOI for automated persistent identification of data sets. A data DOI has the prefix 10.1594 which is assigned to the publication of primary data through the TIB. The suffix, separated by a slash, is composed of the data system or centers acronym and a system specific part. In a Pangaea DOI, this part is equivalent to the internal ID automaticaly assigened to a data set by the relational database management system during import; thus the uniqueness of each DOI is assured.

A valid Pangaea-DOI has the syntax 10.1594/PANGAEA.123456.

Citation and DOI are defined in three steps of the data set publication process:
 * 1) If a data set is imported and the status is set to validated it receives an interneal ID which can be resolved as a preliminary DOI through doi.pangaea.de (PANGAEAs own DOI resolver) only.
 * 2) If a data set status is set to published, the internal ID is changed to a global resolvable technical DOI 4 weeks after the last edit and the data set becomes the status citable.
 * 3) On request the DOI can be defined as an offical publication DOI with the citation added to the library catalog of the TIB.

PangaVista and the DOI resolver of PANGAEA can be used for any registered DOI, including preliminary DOIs of Pangaea.

In case a registered data set has to be deleted, in the field other version the link/DOI to the substitute must be given before deletion.
 * Example: doi:10.1594/PANGAEA.58757

Prerequisites to become an agent for the registration of scientific primary data
Any data provider, interested in assigning DOI for data may use one of the agents listed below or become a new agent of the data-DOI agency TIB. When establishing a data system/center new agents need to assure the following points defined through a concept and a policy:
 * Metadata
 * metadata are mandatory and should follow the specific standard of the scientific field (e.g. ISO19115 for geo-data; must be georeferenced in space and/or time)
 * data sets must be accompanied by a citation, consisting of bibliographic fields according to the STD-DOI application profile
 * Access and availibility
 * long-term availability must be assured see NESTOR
 * data must be online available, assuring Open Access for metadata and access restrictions to data in the decision of the agent; Open Access to data is highly recommended
 * Data review and integrity
 * once registered, data sets are static
 * versioning is allowed
 * data review and curation must include an editorial with proof-read by the author/principle investigator
 * an external peer-review of data publications is recommended

Links to agents for archiving geoscientific primary data with DOI

 * World Data Center for Climate (WDCC) for climate models
 * example 
 * contact [mailto:lautenschlager@dkrz.de Michael Lautenschlager]


 * World Data Center for Marine Environmental Sciences (WDC-MARE) with PANGAEA for georeferenced observational data
 * example: 
 * contact [mailto:hgrobe@pangaea.de Hannes Grobe]


 * World Data Center for Remote Sensing of the Atmosphere (WDC-RSAT) for remote sensing
 * example in preparation
 * contact [mailto:michael.bittner@dlr.de Michael Bittner]


 * GeoForschungszentrum Potsdam (GFZ) with ICDP
 * example 
 * contact [mailto:jklump@gfz-potsdam.de Jens Klump]

Links

 * The International DOI Foundation (IDF) http://www.doi.org/
 * DOI Project for scientific primary data http://www.std-doi.de
 * DOI of the DOI system:
 * DOI of the Pangaea data library:
 * DOI resolver of Pangaea
 * What is a resource identifier?
 * DOI of a publication using a sub-DOI for an image in the publication.
 * Handle System
 * to check handle values, type in a DOI and check Don't Redirect to URLs


 * kopal - Kooperativer Aufbau eines Langzeitarchivs digitaler Informationen
 * nestor - Kompetenznetzwerk Langzeitarchivierung
 * vascoda - Internet-Portal für wissenschaftliche Information
 * vascoda search
 * PARSE.Insight - Permanent access to the records of science in Europe