Modeling in PACE is carried out with the semigraphical programming language MSL (Modeling and Simulation Language). With MSL the process paths, which are the paths on which the simulation objects (documents, workpieces, etc.) move, are drawn with a comfortable graphical net editor. Every path consists of a number of network nodes, to which program texts, so-called inscriptions, are appended. These determine the direction and processing of the simulation objects during the simulation. Parts of nets can be combined into modules or components which represent further application-oriented network nodes.
For the programming of inscriptions a large number of methods and procedures are available. Among others, they include:
Example: A street to which a car wash is attached: