5.2.1 File Section
The File Section must contain a level indicator for each input and output
file:
- For all files except sort/merge, the File Section must contain an FD
entry.
- For each sort or merge file, the File Section must contain an SD
entry.
-
file-name
-
Must follow the level indicator (FD or SD), and must be the same as
that specified in the associated SELECT clause. The file-name must
adhere to the rules of formation for a user-defined word; at least one
character must be alphabetic. The file-name must be unique within
this program.
One or more record description entries must follow the file-name.
When more than one record description entry is specified, each entry
implies a redefinition of the same storage area.
The clauses that follow file-name are optional; they can appear in any
order.
-
FD (Formats 1, 2, and 3)
-
The last clause in the FD entry must be immediately followed by a
separator period.
-
SD (Format 4)
-
An SD entry must be written for each sort or merge file in the
program. The last clause in the SD entry must be immediately followed
by a separator period.
The following example illustrates the File Section entries needed for
a sort or merge file:
SD SORT-FILE.
01 SORT-RECORD PICTURE X(80).
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