SimpleAttribute PythonCode {}
SimpleAttribute String {}
SimpleAttribute Natural {}

Class AtomicDEVSBlock {
    name : String
    parameters : Natural
    timeAdvance: PythonCode
    outputFnc: PythonCode
    intTransition: PythonCode
    extTransition: PythonCode
    initialState: PythonCode
}

Class Port {
    name: String
}

Class InputPort: Port {}
Class OutputPort: Port {}

Association DEVSBlockToPort(AtomicDEVSBlock, Port) {}