Generally and not exclusively, there is disclosed a method and a routine that may be operated upon by a processor and is contained in a media, to execute a simulation of a system. The routine operates upon a database whose contents are a standardized formulation of the system to be simulated. Generally and not exclusively the standardized database is disclosed. Generally and not exclusively a language is disclosed that describes the characteristics of the system to be described in the database, and that can be converted by a compilation process to yield the data in the database.