Our goal is to develop a library of executable models for different kinds of randomised controlled trials which can be downloaded and populated with relevant data variables, decisions, workflows etc. OpenClinical.net will support users running these trials with databases and data mining services. It is anticipated that trials will be primarily trials of informatics interventions (e.g. to evaluate decision support or clinical pathway services) but it may be possible to use the services in traditional trials as well (e.g. to compare alternative treatments or other interventions where the trial model is published on Repertoire).