SYSTSIN DD Statement

The SYSTSIN DD statement is used to specify that the data to follow consists of executable commands and/or subcommands. For example, to indicate to the system that all data following this statement is to be used as input, until the system encounters an input delimiter, such as the characters /* or the DLM operand, specify:

//SYSTSIN  DD  *

If any of the input statements start with the characters //, use the DD DATA statement instead.

To indicate to the system that all data following this statement is to be used as input, including statements that start with the characters //, until an input delimiter (/* or DLM) is found, specify:

//SYSTSIN  DD  DATA

To indicate to the system that all the input data can be found in data set PREFIX.INPUT.DATA, specify:

//SYSTSIN  DD  DSNAME=PREFIX.INPUT.DATA

The SYSTSIN and SYSTSPRT DD statements can refer to a sequential data set or a member of a partitioned data set.

It is recommended that the SYSTSIN DD be defined as a fixed block format data set, with an LRECL of 80.

If SYSTSIN is a fixed length data set (FB), the last 8 bytes of the record will be treated as a sequence number and ignored.

If SYSTSIN is a fixed length data set with ASA control characters (FBA), the first byte of the record will be treated as a carriage control character and ignored.

If SYSTSIN is a variable length data set (VB), the first 8 bytes of the record will be treated as a sequence number and ignored.

If SYSTSIN is a variable length data set with ASA control characters (VBA), the first 9 bytes of the record will be treated as a sequence number, followed by a carriage control character and ignored.

You cannot refer to concatenated data sets on the SYSTSIN DD statement. Each command or subcommand must begin on a separate statement.