The National Institute for Health and Welfare (THL) has compiled a vocabulary on structured registration. The vocabulary includes the key concepts which appear in national specifications and handbooks on Kanta Services (the national data system services for healthcare services, pharmacies and citizens). THL aims to harmonize and further develop these concepts and also compose diagrams on them and it has enlisted The Finnish Terminology Centre to facilitate the work. The first phase of the terminology work shall take place in 2016–2017; the goal is to analyse concepts related to structured registration and create a proposal for how the development of the concepts.