It is recognized that transformations to both data and metadata at several levels are a critical part of data integration. The mappings used to inform transformations are a critical aspect of this, being both needed provenance information and also potentially providing a reusable FAIR resource in their own right. There is an RDA group working on FAIR Mappings, and the CDIF WG follows this work and attempts to align with it. Currently, the use of A Simple Standard for Sharing Ontology mappings (SSSOM) is seen as a useful standard for the expression of mappings, with the RDF Mapping Language RML also proving to be of interest, This is an area where more work remains to be done, but will be the subject of a CDIF profile in the not-too-distant future.