def is_scalar_type(param_type: str) -> bool:
    """Tests if a parameter type is a scalar DeCoP value (e.g. boolean).

    Args:
        param_type (str): The type name of the parameter.

    Returns:
        bool: True if the type is scalar, false if it is complex.

    """
    return param_type.lower() in {'boolean', 'integer', 'real', 'string', 'binary'}