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Table 20. Open Feedback Area (continued)<br />
Offset Data Type Length Contents <strong>File</strong> Type<br />
139 Character 1 Miscellaneous flags.<br />
Database<br />
Bit 1: Null-capable field file.<br />
0 <strong>File</strong> does not contain null-capable fields.<br />
1 <strong>File</strong> contains null-capable fields.<br />
Bit 2: Variable length fields file.<br />
0 <strong>File</strong> does not contain any variable length fields.<br />
1 <strong>File</strong> contains variable length fields.<br />
Bit 3: Variable length record processing<br />
0 Variable length record processing will not be done.<br />
1 Variable length record processing will be done.<br />
Bit 4: CCSID character substitution<br />
0 No substitution characters will be used during CCSID data<br />
conversion.<br />
1 Substitution characters may be used during CCSID data<br />
conversion.<br />
Bit 5: Job Level Open Indicator<br />
Bits 6-8: Reserved.<br />
0 This ODP is not scoped to the job level.<br />
1 This ODP is scoped to the job level.<br />
140 Character 6 Reserved.<br />
146 Binary 2 Number of devices defined for this ODP. For displays, this is determined by the<br />
number of devices defined on the DEV parameter of the Create Display <strong>File</strong><br />
(CRTDSPF) command. For ICF, this is determined by the number of program<br />
devices defined or acquired with the Add ICF Device Entry (ADDICFDEVE) or the<br />
Override ICF Device Entry (OVRICFDEVE) command. For all other files, it has the<br />
value of 1.<br />
All<br />
148 Character Device name definition list. See “Device definition list” for a description of this<br />
array.<br />
Device definition list<br />
Database<br />
Database<br />
Database,<br />
Display<br />
The device definition list part of the open feedback area is an array structure. Each<br />
entry in the array contains information about each device or communications<br />
session attached to the file. The number of entries in this array is determined by<br />
the number at offset 146 of the open feedback area. The device definition list<br />
begins at offset 148 of the open feedback area. The offsets shown for it are from the<br />
start of the device definition list rather than the start of the open feedback area.<br />
Table 21. Device Definition List<br />
Offset Data Type Length Contents <strong>File</strong> Type<br />
0 Character 10 Program device name. For database files, the value is<br />
DATABASE. For printer or diskette files being spooled, the<br />
value is *N. For save files, the value is *NONE. For ICF files,<br />
the value is the name of the program device from the<br />
ADDICFDEVE or OVRICFDEVE command. For all other<br />
files, the value is the name of the device description.<br />
10 Character 50 Reserved.<br />
All<br />
All<br />
All, except inline<br />
data<br />
Appendix A. Feedback area layouts 173
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