Map or .mdq files in a PDS or PDSE

When a map or .mdq file is a partitioned data set (PDS or PDSE), its DD statement determines how you specify it in the preloader control file.

If the ddname of the DD statement is the map or .mdq file name, the preloader control file specifies only the map or .mdq file name. For example, the following DD statement loads the TEST1 map from the TX.MAPS PDS:
```
//TEST1 DD DSN=TX.MAPS(TEST1),DISP=SHR
```
The preloader control file must specify the following MAPNAME:
```
MAPNAME=TEST1
```
If the ddname of the DD statement is not the map or .mdq file name, the preloader control file specifies both the ddname and the map or .mdq file name. For example, the following DD statement loads the TEST1 map from the TX.MAPS PDS:
```
//MAPLIB DD DSN=TX.MAPS,DISP=SHR
```
In this case, the preloader control file must specify both the MAPLIB ddname and the TEST1 map name:
```
MAPNAME=MAPLIB(TEST1)
```