Tallinn University of Technology (TTÜ) scientists and the European Commission presented a unique “The Once-Only Principle Project” (TOOP), the purpose of which is to explore and demonstrate the “once-only” principle on a cross-border pan-European scale.
For this purpose a generic federated architecture will be developed that is able to connect registries and e-government architectures in different countries. TOOP is unique in its ambition and scale, aiming to connect 60 information systems in 20 countries.