Use the INCLUDE statement to include a member in the initialization stream member. Different sections of the initialization stream can be put into different members and included in the primary initialization stream member. The member is the PDS member name within the data set specified on the JES3IN DD statement in the JES3 procedure to be included. Up to four member levels can be used (the primary initialization stream member and up to three INCLUDE level members) with the exception of the INCLUDE that contains the DYNALLOC statements where only a single level of nesting is supported.