The I&C functions are a core area of automation technology. The corresponding terms are
standardized in the IEV. They are elaborated by the manufacturers of the control systems, who
supply the I&C functions as system services. They are therefore only partly standardized, as
this was not necessary in the context of practical use of the control systems. In an extended
consideration of the systems, the I&C functions are however not only interesting on the process
control level, but can be made available in a generalized form to all participants on all levels as
uniform system functions. For that purpose, they are to be explicitly described as reference
models and standardized.