The PATTERN project is a collaborative effort between numerous scientific and non-scientific partners to collect and analyze data related to environmental and climate policy evaluation. With each partner collecting their data, it is essential to have a centralized repository of information that describes the structure, content, and context of the data being collected. This is where Deliverable 3.1 comes into play. By having a metadatabase, the PATTERN project will be able to (1) ensure consistency, (2) facilitate data sharing, and (3) enhance data quality by better monitoring. This metadatabase will enable partners within the PATTERN project to manage and share data in a more effective way. Reference: Opensource metadatabase for the PATTERN case studies. 2023. Anougmar, S., Van Schoubroeck, S., Lakanen, L., Halonen, V., Jouzi, F., Claudelin, A., Pisciella. P.