Instrument function indicator issue

For example, FIC stands for Flow-Indication-Control

Where does this map represent? According to the HG/T 20505 2014 standard, the functional letter code is divided into two parts: the first part is the initial letter (with an optional modifying letter if necessary), which represents the variable being measured or the variable that triggers the action ； Subsequent letters are composed of multiple letters, divided into reading functions and output functions, and may include modifying letters when necessary. In the table provided by the original poster, the first column contains the initial letter, and the second column contains the modifying letter for that initial; both are part of the first segment of the functional letter code ； The third column represents the subsequent readout function, and the fourth column represents the output function; both belong to the second part of the functional letter code. The modifying letters for the second part are not indicated in the table.

The homepage description of our PID mentions the UOP process; thank you for your answer