//AB1005A EXEC GO,MEMBER=AB1005A,VER=PROD,TBLVER=PROD //XYZFILE DD DSN=ABC01V.XYZ.PROD.DMYFILE,DISP=SHRIn this example, XYZFILE already exists. Note that, for already existing files, DISP=SHR is specified on the same line.
If this were a tape dataset, the DD statement would look as follows:
//AB1005A EXEC GO,MEMBER=AB1005A,VER=PROD,TBLVER=PROD //XYZFILE DD DSN=ABC01.XYZ.PROD.DMYFILE,DISP=OLD