atom
    Part of
        the block definition in a .scb file. The atom includes
            OML code that performs parameter checking and computes the internal
        parameters used by the simulation function of the block based on block parameters. An atom
        acts as an interface between the user-defined block parameters and the communication of
        those parameters and other internal elements to the Simulator. In the case of programmable
        super blocks, the OML code defines the diagram of the super blocks.