FAIR Guiding Principle F4:
(meta)data are registered or indexed in a searchable resource
Interpretation of F4
Principle F4 states that digital resources must be registered or indexed in a searchable resource (e.g., a search engine). The searchable resource provides the infrastructure by which a metadata record (made accessible with a GUPRI, F1) can be discovered, using either the attributes in that metadata (F2) or via the identifier of the resource itself (F3) .
This interpretation of F4 is based on 'FAIR Principles: Interpretations and Implementation Considerations'. Jacobsen et al, Data Intelligence 2020; 2 (1-2): 10–29. doi: https://doi.org/10.1162/dint_r_00024
 T. Weigel , U. Schwardmann , J. Klump , S. Bendoukha & R. Quick . Making data and workflows findable for machines. Data Intelligence 2(2020), 40–46. 10.1162/dint_a_00026
Machine-Centric Science, Podcast by Donny Winston: https://open.spotify.com/episode/2A1Zn6tOc3g8D7KZHZRygf