The documentation for the ODIS-architecture is openly available online here. The development of this documentation is still advancing well. We have developed specifications for all six of the priority themes, and an initial test of ODIS, to allow search across multiple databases, has been successful. Our WP2 technical working group now has over 90 technical experts from partner projects and pilot regions, with our technical working platforms still active on Slack (over 4100 posts) and Github. 39 WP2 Technical meetings were held during 2021 and all meeting reports or recordings are available. Several additional bilateral technical meetings were held.