An instruction class set is both a container of instruction classes and a node class. An instruction class set defines an assembler instruction set for nodes belonging to the node class and specifies associated model behavior.
A name and event handler function specify an instruction class set. By default, the name of this event handler function is the name of an instruction class set.
The event handler function can processes transferring control to the nodes of a node class represented by the instruction class set and returning control from the nodes during model execution. Since QSMM 1.19, you can define an instruction class set without an event handler function.
The initialization of an instruction class set typically includes adding instruction classes to it.