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Digital Object Identifier System and DOI Names (DOIs) Guide

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Who should read this?

This guide is intended for researchers and eResearch infrastructure support providers. It explains the Digital Object Identifier system and the advantages of using a DOI Name to cite and link to research data. This guide should be read in conjunction with the ANDS Guides on Persistent identifiers and Data citation.

What is the DOI System?

The Digital Object Identifier system is used for identifying intellectual property in the digital environment. It is used principally by publishers, and is an implementation of the Handle System for persistent identifiers. The International DOI Federation (IDF) appoints Registration Agencies who allocate DOI prefixes, register DOI Names, and provide the necessary infrastructure to allow registrants to declare and maintain metadata.

Major applications of the DOI system currently include:

  • persistent citations in scholarly materials (journal articles, books, etc.) through CrossRef, a consortium of around 3,000 publishers;
  • scientific data sets, through DataCite, a consortium of leading research libraries, technical information providers, and scientific data centres; and
  • European Union official publications, through the EU publications office.

To promote the citation and reuse of Australian research data, ANDS provides a DOI Service for research datasets as a free service to Australian institutions.

DOIs (Digital Object Identifiers)

A DOI Name (DOI) is a specific type of Handle and can be assigned to any object that is a form of intellectual property. DOI should be interpreted as 'digital identifier of an object' rather than 'identifier of a digital object'.

A DOI consists of a unique, case-insensitive, alphanumeric character sequence that is divided into two parts, a prefix and a suffix, separated by a forward slash. The prefix is assigned by a DOI Registration Agency and always starts with '10.' This distinguishes it as a DOI as opposed to other types of Handle. The suffix is assigned by the publication agent, the agency supplying the information about the object, and must be unique within a prefix.

DOI

Example of a DOI within a data citation:

Hanigan, Ivan (2012): Monthly drought data for Australia 1890-2008 using the Hutchinson Drought Index. The Australian National University Australian Data Archive. DOI :10.4225/13/50BBFD7E6727A http://dx.doi.org/10.4225/13/50BBFD7E6727A

This is a complete DOI Name. The prefix 10.4225 consists of the directory code '10' (always 10 for a DOI Name) and the registrant's code '4225' which is allocated by the German National Library of Science and Technology for scientific datasets in its role as a registration agency.

Citations for this DOI should be in the form

DOI :10.4225/13/50BBFD7E6727A

but the hypertext link should be

http://dx.doi.org/10.4225/13/50BBFD7E6727A

What is the difference between a DOI and other Persistent Identifiers?

A DOI is a Persistent Identifier (PID), but also provides extra benefits. A DOI can be used to uniquely identify either digital or non-digital objects, whether or not they have any internet presence.

A DOI persistently identifies an object itself through listing it in a DOI Registry, while a PID persistently identifies only an object's location. DOIs are supported by the International DOI Federation (IDF) and Registration Agencies infrastructure, which provides ongoing DOI services and allows for a high level of confidence in the quality and accuracy of DOIs.

An object may have multiple DOIs and multiple PIDs assigned to it as it moves through the publishing process. If an object has an internet location, it will have either a URL or other persistent identifier (such as Handle, PURL or ARK) in addition to a DOI. Each DOI and PID will confer a different benefit on the dataset.

What are the advantages of DOIs for datasets?

The assignment of DOIs through the international DOI infrastructure has associated costs. Accordingly, DOIs are unlikely to be issued on an ad hoc or unmanaged basis, but will be assigned by authorised agencies or institutions to datasets that are well described and managed archivally for long-term access.

The assignment of a DOI therefore indicates that a dataset will be well managed and accessible for long-term use. It also brands published data as a first-class research output in the publishing world, since datasets will be assigned DOIs regularly as is done for existing scholarly publications.

Using DOIs in this way will establish easier access to research data on the Internet, increase the acceptance of research data as legitimately citable contribution to the scientific record, and support data archiving that will permit results to be verified and re-purposed for future study.

What is ANDS doing?

ANDS is a member of the DataCite consortium, a group of leading research libraries and technical information providers that aims to make it easier for research datasets to be handled as independent, citable, unique scientific objects. ANDS runs a DOI Local Handle Server, minting and managing DOIs on behalf of DataCite.

ANDS has its own DOI prefix and research institutions, consortia and agencies are able to obtain DOIs for scholarly outputs such as:

  • datasets and collections
  • associated workflows
  • software
  • models
  • grey literature

The ANDS Cite My Data DOI minting service is available as a machine to machine or manual service.  It is free to use for publicly funded Australian research organisations and government agencies.

ANDS is also been working with Thomson Reuters and data providers to track and record dataset use through DOIs, and making that information available through the Data Citation Index.

Further Information

Frequently Asked Questions: