FAIRCORE4EOSC is one the first projects funded from the Horizon Europe Framework Programme to contribute to the European Partnership on the European Open Science Cloud (EOSC). EOSC is often referred to as the Web of FAIR Data and Services for science in Europe. It will provide a trusted, virtual, federated environment to store, share and re-use research data across borders and scientific disciplines. EOSC aims to give the European Union a global lead in research data management and ensure that European scientists can reap the full benefits of data-driven science. FAIRCORE4EOSC project contributes to EOSC by developing nine new technical components to enrich the EOSC-Core, the services that allow EOSC to operate. These new components will significantly improve the discoverability and interoperability of an increased amount of research outputs and support the European co-programmed Partnership on EOSC in deploying a European Research Data Commons where data are Findable, Accessible, Interoperable, Reusable (FAIR). More specifically, the new components will improve the way of interlinking research entities across domains and data sources on the basis of Persistent Identifiers, ensure the long-term preservation of research software, support for sharing and access to metadata schemas and crosswalks, and offer advanced research-intent driven discovery services.