%0 Conference Proceedings %T Towards a Cross-Border Reference Architecture for the Once-Only Principle in Europe: An Enterprise Modelling Approach %+ Tallinn University of Technology (TTÜ) %+ Luxembourg Institute of Science and Technology (LIST) %+ Ministry of Mobility and Public Works (MMTP) %+ Chasquis Consulting %+ National Institute for Research and Development in Informatics [Bucharest] (ICI) %+ Autorité nationale anticorruption = Autorità Nazionale Anticorruzione, (ANAC) %+ Centre for Research and Technology Hellas (CERTH) %+ University of Macedonia [Thessaloniki] (UoM) %+ Centre for Research and Technology Hellas [Athènes] (CERTH) %A Tepandi, Jaak %A Grandry, Eric %A Fieten, Sander %A Rotuna, Carmen %A Sellitto, Giovanni, Paolo %A Zeginis, Dimitris %A Draheim, Dirk %A Piho, Gunnar %A Tambouris, Efthimios %A Tarabanis, Konstantinos %Z Part 3: Reference Architectures and Patterns %< avec comité de lecture %( Lecture Notes in Business Information Processing %B 12th IFIP Working Conference on The Practice of Enterprise Modeling (PoEM) %C Luxembourg, Luxembourg %Y Jaap Gordijn %Y Wided Guédria %Y Henderik A. Proper %I Springer International Publishing %3 The Practice of Enterprise Modeling %V LNBIP-369 %P 103-117 %8 2019-11-27 %D 2019 %R 10.1007/978-3-030-35151-9_7 %K Once-Only Principle %K EU Single Digital Gateway %K Reference Architecture %K TOOP %K EU Building Blocks %K TOOPRA %Z Computer Science [cs] %Z Humanities and Social Sciences/Library and information sciencesConference papers %X The Once-Only Principle states that citizens and businesses provide data only once in contact with public administrations. So far, many European countries have started to implement the Once-Only Principle at national level, but its cross-border implementation is still fragmented and limited. This paper presents the development of a Reference Architecture for the Once-Only Principle in Europe. The case study, stemming from the EU-funded Once-Only Principle project (TOOP) highlights the challenges faced by the architecture team when developing the Reference Architecture that tackles the Once-Only Principle across different countries and policy domains. The architecture is not built from scratch, but re-uses and enhances already available building blocks in order to seamlessly preserve interoperability and to comply with regulations and existing technical standards, leaving at the same time enough space for vendors and open source developers to propose their compliant solutions, whatever is their business model. %G English %Z TC 8 %Z WG 8.1 %2 https://inria.hal.science/hal-03231361/document %2 https://inria.hal.science/hal-03231361/file/491976_1_En_7_Chapter.pdf %L hal-03231361 %U https://inria.hal.science/hal-03231361 %~ SHS %~ IFIP %~ IFIP-TC %~ IFIP-LNBIP %~ IFIP-WG %~ IFIP-TC8 %~ IFIP-WG8-1 %~ IFIP-POEM %~ IFIP-LNBIP-369