Using the JCL DD Statement to Allocate External Files :: SAS(R) 9.3 Companion for z/OS, Second Edition

The syntax of the JCL DD statement is

options include options such as file disposition as well as options that describe the format of the file.

Here are some examples:

Allocating an existing sequential data set:
```
//BOOKS DD DSN=LIBRARY.CATALOG.DATA,DISP=SHR
```

Allocating a new sequential data set:

//REPORT  DD DSN=LIBRARY.REPORT.FEB08,DISP=(NEW,CATLG),
//           SPACE=(CYL,(1,1)),UNIT=SYSDA,
//           DCB=(LRECL=80,RECFM=FB,BLKSIZE=6160)

Concatenating sequential data sets:

//INPUT   DD DSN=LIBRARY.DATA.QTR1,DISP=SHR
//        DD DSN=LIBRARY.DATA.QTR2,DISP=SHR
//        DD DSN=LIBRARY.DATA.QTR3,DISP=SHR
//        DD DSN=LIBRARY.DATA.QTR4,DISP=SHR

For complete information about the JCL DD statement, see the appropriate JCL User's Guide and JCL Reference for your OS level.