Structure of KiSAO. The Kinetic Simulation Algorithm Ontology (KiSAO) consists of three main branches representing the hierarchy of simulation algorithms, their characteristics and their parameters. The relationships has characteristic and has parameter are used to link algorithms to the characteristics they possess and parameters they use. The algorithms stored in KiSAO are annotated with their names, synonymous names, descriptions and links to the articles describing them. Information about parameter types is also incorporated into KiSAO.