What is DOI?

The DOI system is an internationally recognised and supported standard, managed by the International DOI Foundation. For more information, see http://doi.org Digital Object Identifiers (DOIs) are persistent identifiers that are used to uniquely identify an object (which may itself be physical or digital) in the digital environment. A DOI name is easily and quickly resolved using the International DOI Foundation resolver, http://doi.org. For example: the persistent identifier http://dx.doi.org/10.15152/QDB.124 refers to the address http://qsardb.org/repository/handle/10967/124 that may change. A simple explanation of the working principle of DOI would be that the data centre connects a DOI with a web address (URL) of a certain data collection. When the data centre moves the data collection elsewhere or changes its address, they also have to renew the DOI so that it would still refer to the same data in their new location. For more information about how DOIs work, see IDF web page.

How can I register my research data with the help of DOI?

Research data are registered through the research institutions that have joined the DataCite Eesti Consortium. A representative of a research group or a single researcher should contact their organisation and/or the DataCite Eesti administrator [datacite@datacite.ee]. The following actions need to be taken for getting DOIs.

1. Decide whether DataCite DOIs are right for your organisation and data (the data are public as Open Data).
You should consider whether you meet the basic requirements set out in our DataCite checklist:
Foto: Andres Tennus/Tartu Ülikool
  • You have the authority to assign DOIs to data
  • You can guarantee data persistence
  • You can guarantee the renewal of data entries when necessary
  • The data is accessible to external users
  • The data has citation potential.
You must also be able to commit to ongoing responsibilities:
  • Provide and maintain at least the mandatory DataCite metadata for each item with a DOI and store the respective metadata
  • Make metadata openly available without restriction (under Creative Commons Zero waiver)
  • Maintain publicly accessible landing pages for each item with a DOI.

2. Test account
You have the option to find out more before making a final decision by requesting access to a test account. The test account allows you to register temporary DOIs and to explore how the service fits within your workflows.
3. The contract and costs (for non-members)
The next step is the conclusion of the contract. All institutions can join the DataCite Eesti Consortium, provided that their application is approved by the Consortium Board. In order to join, a representative of the institution has to submit an application to the Consortium Board. The Board will make the decision no later than two months from the application date. On joining the Consortium, the institution has to pay the joining fee, specified by the Board, to the bank account of the DataCite Eesti authorised manager.
4. Implementing DataCite DOIs
Once the contract is agreed, we will provide you with a Metadata Store account and unique DOI prefix so that you can begin minting DOIs for your data.

How do DOIs work?

DOI Logo A DOI name consists of a prefix and a suffix separated by a forward slash (e.g. 10.1234/56789). Each organisation is assigned its own unique prefix, and decides its own suffix format. The most important property of a DOI suffix is that it should be unique within the given prefix space. The DataCite system will reject any attempt to mint duplicate DOIs. Please consider the following points when creating your suffixes:
  • We suggest that the optimum length is 8-10 characters. This is long enough to ensure uniqueness, but short enough to avoid any typing or text wrapping errors. The DataCite system will not accept DOIs longer than 255 characters
  • DOIs are not case sensitive (10.1234/WXYZ and 10.1234/wxyz are the same DOI)
  • We strongly recommend that only the following characters are used within a DOI name: “0–9”, “a–z”, and “–._/”. Although the DOI name itself can accommodate a wider range of characters, some require encoding so that the DOI works correctly when used in URL form. If you need to use additional characters, please follow the recommendations on encoding provided by the International DOI Foundation (IDF).

Testing environment

The test system will work in almost all respects exactly like the live DataCite service. But there are the points you may need to be aware of:
  • DOIs created on the test server are NOT PERSISTENT and so should not be used publicly
  • As this is independent from the ‘live’ DataCite system, DOIs created in testing will not resolve using the usual dx.doi.org URL. But there is a specific test system URL that you can use to resolve test DOIs
  • Other than the endpoint you are using to connect to the test machine, the API will function in exactly the same way as the minting DOIs using the live service
  • The data in the test system will occasionally be over-written, but we'll let you know before it happens, so that you can prepare or postpone any phases of testing
  • If you go on to become a data client, you will still be able to use the test system as a sandpit to try out new services During development and/or testing, you will be assigned a test DOI prefix (10.5072/)
Please contact us at datacite@datacite.ee to set up a test account and check that it will meet your needs. In order to set up the test system, we will need to know:
  • DOI Account Name - A name for the Cite My Data account. Usually, this is the name of the organisation.
  • The email and contact name of the person who will be using the account. Your password and any system emails will be sent to that address.
  • The domain(s) in which your URLs will be located. You will only be able to mint DOIs to the domains associated with your account – these can be updated or added to at any time.
DataCite Eesti provides the data centres with the DOI prefixes. The data centres can create their own DOI suffixes, ensuring their uniqueness. For example:
  • 10.15152/UTL.Dspace/1
  • 10.15152/UTL.Dspace/2

Creating and managing your DOIs

Technical Information for Data centres

Data centres are responsible for managing, preserving and providing access to their own data. DataCite stores only the metadata associated with the registered data set, the URL for the data set landing page and the registered DOI assigned to the data.

Metadata schema You can consult the DataCite Metadata Schema for current information. This schema contains a list of the metadata properties necessary for the precise identification of data for citation purposes along with user instructions and examples.
Mandatory metadata are:
  • DOI - When combined, the DOI prefix and suffix must uniquely identify the resource.
  • URL - The URL for the landing page of the resource.
  • Title - A name or title by which a resource is known.
  • Creators - The main researchers involved in producing the data, or the authors of the publication, in priority order.
  • Publisher - The entity that holds, archives, publishes, prints, distributes, releases, issues, or produces the resource. This metadata element will be used to formulate the citation, so consider the prominence of the role.
  • Publication Year - The year when the data was or will be made publicly available.

DataCite API
API DataCite has created an API for users who wish to automate the registration process (minting DOIs and adding metadata). For detailed technical information on the API, please consult DataCite’s documentation.

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