There are two required DD names for the Source Language Debug (SLD) XSLDMOD (XSLD) routine:
| SLD | |||||
| DD | Description | Access Method | LRECL | BLKSIZE | RECFM |
| SYSADATA | Output from HLASM or SPC, which is used as input to XSLD. | QSAM | 8188 | 8192 or greater | VB |
| SLDLOGIC | Output from XSLD, which is used input to SLD. | QSAM | 8188 or larger | At least 4 greater than LRECL | VB |