2) CellML-A Biological Model-Based Repository: This application is similar to the BioModels Database application and uses a markup language called CellML developed specifically for describing biological processes contained in CellML [12] . The repository is a Web site that stores and exchanges computer-based mathematical models. This site allows scientists to share models described by the CellML markup language. It also enables them to reuse components from one model in another, thus accelerating model building (for detail, see http://www.cellml.org/examples/repository/index.html).