The sources of support for research are varied and the terms ‘grants’ and ‘grant identifiers’ are used inclusively here for ‘grants, endowments, secondments, loans, use of facilities/equipment and even crowd-funding’.

The Grant Identifier initiative, led by Crossref and several funders including Wellcome Trust, JST, European Research Council and NIH, launched a registration service for grant IDs in 2019. Funders can now register research grants with Crossref. Essentially, DOIs are used in this scheme and assigned to every grant awarded. Some organizations are working on a pilot implementation of these DOIs for Wellcome Trust and some other early adopter funding organizations. Grant IDs can be added to records on Zenodo.

See more Unique identifiers on Wikipedia