The two types of coding in set diagrams I would like to return to the subject of my article Two types of coding 1 and clarify the difference between the two types of coding using set diagrams. I believe this distinction is so important for the field of semanticsand for information theory in general, that it should be generally understood. Information-preserving coding The information-preserving type of coding can be represented using the following diagram Fig 1: Information-preserving coding (1:1, all codes reachable) The original form is shown on the left and the encoded form on the right. The red dot