These macroinstructions request session establishment, data transfer, and VTAM® program operator control. They all use an RPL and, with the exception of CHECK, permit you to specify RPL modifications in the macroinstruction itself. See the following sections for a description of the RPL-based macroinstructions:

• Session-establishment macroinstructions
• Session-termination macroinstructions
• Communication macroinstructions
• Macroinstructions that assist in session establishment or communication
• Program operator macroinstructions