This deliverable summarises the steps to integrate mapping.bio, a tool to create and curate FAIR semantic mappings, into BioDT’s FAIR service architecture. Mapping.bio was designed by building on an EOSC study proposing a framework to generate, document and publish mappings and crosswalks under the label "Flexible Semantic Mapping Framework" (SEMAF). The tool is implemented as a lightweight web service to visually create mappings using an intuitive user interface and to store these mappings in compliance with the "Simple Standard for Sharing Ontology Mappings" (SSSOM) as FAIR-compliant digital objects (FDOs) in a repository. The FDOs build on web-centric specifications such as RO-Crate (lightweight packaging of research outputs), schema.org/ Bioschemas (structured metadata) and FAIR Signposting (web linking of digital objects) which work effectively together to comprise machine-actionable data units suited for exchange and reuse of semantic mappings within and across federated data spaces such as EOSC and the Destination Earth Data Lake. This deliverable was submitted to the granting authority 31/05/2024. It has been approved by the granting authority.