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 20 Million registered DOI for publications, the system is established and consequently used by scientific publishers and organisations.

Within the project STD-DOI the first agency providing DOI for data is the Technical Information Library (TIB) in Hannover. PANGAEA among four data providers is one of the first data systems on the Internet using DOI for persistent identification of scientific data. A data DOI consists of the prefix 10.1594 which is assigned to the publication of primary data through the TIB and a suffix, separated by a slash. The suffix is composed of the data system or center and a system specific part. In the case of Pangaea this part is the internal ID automaticaly assigened to a data set by the relational database system. Thus, a valid Pangaea-DOI has the syntax 10.1594/PANGAEA.123456.

Citation and DOI are defined during three steps of a data sets 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 only.
 * 2) If a data set status is set to published the internal ID is changed to a global resolvable technical DOI after 4 weeks and the data set becomes citable.
 * 3) On request the DOI can be defined as an offical publication DOI with the citation included in the library catalog of the TIB (http://tws.gbv.de). If several data sets should be made citable, a new parent DOI my be defined by the systems editor.

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

Within the STD-DOI project, funded by the DFG, four agents consisting of the German WDC cluster (WDC-Climate, WDC-MARE, WDC-RSAT) and GFZ together with TIB as agency have establish the DOI-system for data citations/publications.

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

 * Homepage of the DOI Project for scientific primary data http://www.std-doi.de
 * DOI of the DOI system:
 * DOI of the Pangaea information system:
 * DOI resolver of Pangaea
 * What is a resource identifier?


 * kopal - Kooperativer Aufbau eines Langzeitarchivs digitaler Informationen
 * nestor - Kompetenznetzwerk Langzeitarchivierung
 * vascoda - Internet-Portal für wissenschaftliche Information
 * vascoda search