Gavardinas, CostasFotopoulos, FotisGijsbers, PeterMoore, RogerHřebíček, J.Ráček, J.2019-09-162019-09-162005https://dl.gi.de/handle/20.500.12116/27447Modelling environmental process interactions has always been a challenge. Most attempts have resulted in domainspecific, case-tailored models representing the interaction of a small group of processes. From this work, it is now clear that there is little chance of building a single model or modelling system that will adequately represent the full range of processes. Α number of teams have developed frameworks, which have provided a more generic solution to the linking problem but still tend to be domain specific and lack the flexibility that is ideally required. HarmonIT, a European Union co-funded research project bringing together developers from all over Europe, has now developed a solution to the problem by designing and implementing a standard interface for linking mathematical models; it and the supporting software are called the Open Modelling Interface & Environment (the OpenMI). The paper describes the interface and explains the principles upon which it works. It also gives an overview of the environment that has been built to facilitate the linking and running of linked models.Text/Conference Paper