In 2015 the vision of a European Open Science Cloud (EOSC) emerged. EOSC would provide an open and trusted environment for accessing and managing a wide range of publicly funded research data and related services, helping researchers reap the full benefits of data-driven science. EOSC is now entering its implementation phase (2021-2027) which requires active engagement and support to ensure widespread implementation and adoption of the FAIR (Findable, Accessible, Interoperable, Reusable) principles, to define and share standards and develop tools and services, to allow researchers to find, access, reuse and combine research results.

The 3rd call focuses on:

• Managing data types, schemas and vocabularies and crosswalks for FAIR researcher related metadata
• Creating EOSC compliant interoperability policies based on EOSC Interoperability Framework (IF)
• Testing the trustworthy and FAIR-enabling repositories prototype
• Implementation of a shared API for semantic catalogues