This involves open access to research data, which are in electronic format and they are freely available for anyone to use, modify, extract, reuse and share free of charge. These research data have to do with information and more specifically with data and numbers, which have been collected to be examined and analysed as a basis for arguments, discussions, and calculations. In other words, they are used as basic sources in the research process. An example of such data is statistical data, experiment results, measurements, images, etc.. It is recommended that the FAIR principles govern the data. This is a set of guidelines and principles to make data:
Findable = by people and machines. Data and supplementary material with adequate metadata and a unique and persistent identifier.
Accessible. They can be accessed even when they are no longer available. Metadata and data are understandable by both people and machines.
Interoperable. Metadata uses a formal, accessible, shared and broadly applicable language for knowledge representation.
Reusable. Data and collections are defined by clear and explicit usage licenses and are associated with detailed provenance .
More information concerning FAIR principles can be found on FORCE11 Fair Principles website.
The purpose of the national repository of research data HARDMIN (Hellenic Academic Research Data Management Initiative) is the collection of the total of such data created by Greek researchers and scholars. The repository is intended to meet the critical need for safe storage and publication of the research data of the Greek scientific community. The aim is to increase transparency in research, make data available for reuse by researchers all over the world, accelerate the digital transformation of our country’s research field, and adopt competitive practices concerning research proposals and scholarly communication.
 “Horizon 2020 Online Manual. Open Access”. European Commission. Link: https://ec.europa.eu/research/participants/docs/h2020-funding-guide/cross-cutting-issues/open-access-data-management/open-access_en.htm. As of 15/04/2020.
 “Implementing FAIR Data Principles: The Role of Libraries “. Ligue des Bibliothèques Européennes de Recherche-Association of European Research Libraries. Link: https://libereurope.eu/wp-content/uploads/2017/12/LIBER-FAIR-Data.pdf. As of 14/04/2020.