Application programs can receive several types of information. For a description of the types of information that can be exchanged, see Comparing data to indications.

To determine what is received by your application program, check the What-Received field in the RPL extension. This field describes the type of information received by the application program. The What-Received field in the RPL extension is referenced by the labels RPL6RCV1 and RPL6RCV2 in the ISTRPL6X DSECT. (For the complete layout of the ISTRPL6X DSECT, refer to z/OS Communications Server: SNA Programmer's LU 6.2 Reference.)