This work package focuses on finalizing the set of user requirements and creating a suite of relevant use cases, preparing system requirements and design documents, and taking important architectural decisions which would have a significant impact on the consequent integration of software components into the ATLAS platform. Furthermore, during this work package a pilot version of i‑Publisher will be built by adjusting and integrating existing software components. i-Publisher will be deployed as an online service and also used to build and deploy two other online services (thematic web sites) – i‑Librarian and EUDocLib. Finally, the work package focuses on preparing drafts of technical documentation and user guides for the ATLAS platform and the online services.