The potential coupling interface: metadata for model coupling

Model coupling is a nontrivial task that is not adequately supported in existing frameworks. Our long term goal is to support the fast-prototyping of model couplings, enabling scientists to quickly experiment with a variety of linkings without having to make an upfront investment in reprogramming. This paper introduces the centerpiece of our framework, the potential coupling interface (PCI), a visual representation of a model code based on simplified control flow graphs. The PCI serves three roles: it is a new form of metadata describing the coupling potential of a model; it is the vehicle for the specification of couplings; and it is the basis for automatic code generation. It is easy to specify and once specified, it is available for all future coupling activities. The PCI allows scientists to focus on the important domain and model issues of coupling without having to revisit legacy code for each new effort.