Using the internal reader facility

There are four methods of using the internal reader facility. These methods are:

Using a special external writer called INTRDR to submit a job from input in a batch job stream.
Dynamically allocating the internal reader from your program.
Using the IBM-supplied RDR procedure from either a batch job stream or the operator's console to read the job from a QSAM-supported device.
Using the TSO/E SUBMIT command to pass a job stream to the internal reader facility. For more details about the TSO/E SUBMIT command, see z/OS TSO/E Command Reference.

Note: The user portion of the job correlator can be set using the UJOBCORR JCL keyword on the JOB card. For more information on the UJOBCORR keyword, refer to z/OS MVS JCL Reference. A user portion that is set by the UJOBCORR keyword will be overridden by the value that is set in the SYS_CORR_USRDATA symbol. The user portion can also be set in installation exits 2 and 52 for JOB JCL statement scan, and in exits 20 and 50 for end of job input. A user portion that is set in an installation exit will override any value that is specified on the UJOBCORR keyword or in the SYS_CORR_USRDATA symbol. For more information on installation exits, refer to z/OS JES2 Installation Exits.