The purpose of this report document is to provide an account of the contributions generated by of WP2 and WP3 within the scope of the FEDERATE project. It aims to outline the key contributions, methodologies, and outcomes, particularly focusing on the creation and organization of the SDV software building blocks repository. By providing a comprehensive overview of these activities, the report ensures transparency, facilitates knowledge sharing among project stakeholders, and supports ongoing and future work within the FEDERATE project by offering a clear reference point for the project’s progress and achievements thus far. This document describes methodology and first results for the prioritized backlog. Main focus is on how building blocks (BB) are described and prioritized. It is strongly connected with D3.4 (First orchestrated backlog report).