Sequential and GDG Databases

The following table describes the columns in the Load Data Store Information from External Interface sequential file for sequential and GDG databases:

Column	Type	Length	Decimal	Domain
FILETYPE	CHARACTER	001-004	4	GDG or SEQ according to file type
Separator	CHARACTER	005-005	1	must be blank
FILNAME	CHARACTER	006-055	50	data set name (mandatory field)
Separator	CHARACTER	056-056	1	must be blank
NICKNAME	CHARACTER	057-076	20	nickname
Separator	CHARACTER	077-077	1	must be blank
UNLOAD FILE	CHARACTER	078-127	50	unload data set name
Separator	CHARACTER	128-128	1	must be blank
FMTSEL	CHARACTER	129-136	8	format selector
Separator	CHARACTER	137-137	1	must be blank
APPLID	CHARACTER	138-147	10	application code
Separator	CHARACTER	148-148	1	must be blank
CPYLIB	CHARACTER	149-192	44	copybook library
Separator	CHARACTER	193-193	1	must be blank
CPYNAME	CHARACTER	194-203	10	copybook name
Separator	CHARACTER	204-204	1	must be blank
IOAREANAME	CHARACTER	205-234	30	I/O area name
Separator	CHARACTER	235-235	1	must be blank
IOAREAPRG	INTEGER	236-238	3	I/O area progressive

Note: You can specify the FILETYPE parameter for GDG files in either of following ways:

When using the relative name (signed integer) for FILENAME, the FILETYPE must be GDG. For example:
```
GDG  XXXXXX.GDG.TEST(0)   
GDG  XXXXXX.GDG.TEST(-1)
GDG  XXXXXX.GDG.TEST(-2)
```

When using the absolute generation name for FILENAME, the FILETYPE can be GDG or SEQ. For example:

GDG   XXXXXX.GDG.TEST.G0001V00
GDG  XXXXXX.GDG.TEST.G0002V00
GDG  XXXXXX.GDG.TEST.G0003V00

SEQ   XXXXXX.GDG.TEST.G0001V00
SEQ  XXXXXX.GDG.TEST.G0002V00
SEQ  XXXXXX.GDG.TEST.G0003V00

For more information on GDG, see GDG Support in your Process for z/OS Guide.