1 DFHTCT TYPE=SDSCI ,DEVICE=device ,DSCNAME=name
2? ,BLKSIZE=length
3? 
3 ,DDNAME=
3.1! name-in-DSCNAME
3.1?
3.1 name
4 ,MACRF=
5 R
5 W
6? 
6 ,RECFM=
6.1! U
6.1?
6.1 F
6.1 V