The commands introduced in this section are meant for specifying fuzzy sets and encoding data fields into fuzzy values. Typically the fuzzy commands have been hidden behind the GUI, but if you are developing a new user interface, then you should be familier with the commands, too.
The fuzzy tool operates with a fuzzy frame which includes membership functions and statistics and a graphic structure for the fuzzy tool as the following figure shows.
The fuzzy frame contains three parts: a frame for membership functions, a frame for the 
values and a graphic structure. The membership functions are handled as data fields in which the first value defines the type of the set and other values are function specific. The frame ranges includes the minimum and maximum values for fuzzy sets if the automatic initialization is used.