IBM SC33-1683-02 - Manual (Page 251)

Exit XTDIN
When invoked
After receiving data from QSAM (for extrapartition) or VSAM (for
intrapartition).
Exit-specific parameters
UEPTDQUE
Address of the 4-byte TD queue name.
UEPTDAUD
Address of the unmodified TD data.
UEPTDLUD
Address of the fullword length of the unmodified TD data.
UEPTDAMD
Address of the TD data modified by the exit program.
UEPTDLMD
Address of the fullword length of the TD data modified by the exit
program.
Return codes
UERCNORM
Continue TD processing.
UERCPURG
Task purged during XPI call.
XPI calls
You can use:
INQ_APPLICATION_DATA
INQUIRE_SYSTEM
WAIT_MVS
Do not use any other calls.
transient data program exits
Chapter 1. Global user exit programs 219