The OpenAIRE's describes the FAIR Principles below:

The FAIR principles describe how research outputs should be organised so they can be more easily accessed, understood, exchanged and reused. Major funding bodies, including the European Commission, promote FAIR data to maximise the integrity and impact of their research investment.

The Four Basics of FAIR:
  • 'Findable' i.e. discoverable with metadata, identifiable and locatable by means of a standard identification mechanism
  • 'Accessible' i.e. always available and obtainable; even if the data is restricted, the metadata is open
  • 'Interoperable' i.e. both syntactically parseable and semantically understandable, allowing data exchange and reuse between researchers, institutions, organisations or countries; and
  • 'Reusable' i.e. sufficiently described and shared with the least restrictive licences, allowing the widest reuse possible and the least cumbersome integration with other data sources.

Please see "FAIR Data Managementin in Horizon 2020"