This report describes work under the FAIR-IMPACT project WP4/T4.5 FAIR semantic artefacts in use within data repositories, and its main focus points: to demonstrate the feasibility of setting up a connector (Semantic Artefacts Catalogues - SACs x (meta)data repository) and to provide concrete evidence of the added value provided by these SAs for the FAIRness of the scientific data stored in the repositories. A number of use cases (UCs) from different scientific disciplines (agri-food, life sciences, ecology, technical and physical sciences, archaeology, Social Sciences and Humanities, astronomy) and operating at different scales and in different research infrastructures (RI) were examined. They identified the semantic needs of their respective communities and the state of progress and organisation of the semantic representation of knowledge in their environments. Connectors have been (or will be) incorporated into (meta)data repositories depending on : Metadata that can be semantized SAs and SACs available in the community The technologies used by (meta)data repositories and by SAs and SACs The needs and practices of (meta)data repositories users: data users, depositors and managers