The methods of disk file processing include:
Table 46 shows the valid entries for positions 28, 34, and 35 of the file description specification for the various file types and processing methods. The subsequent text describes each method of processing.
| Processing Method |
Limits Processing (Pos. 28) |
Record Address Type (Pos. 34) |
File Organization (Pos. 35) |
|---|---|---|---|
|
Externally Described Files With Keys Sequentially Randomly Sequential within limits (by record-address file) Without Keys Randomly/consecutively |
Blank Blank L Blank |
K K K Blank |
Blank Blank Blank Blank |
|
Program Described Files With Keys (indexed file) Sequentially Randomly Sequential within limits (by record-address file) Without Keys Randomly/consecutively By record-address file As record-address file (relative record numbers) As record-address limits file |
Blank Blank L Blank Blank Blank Blank |
A, D, G, P, T, Z, or F A, D, G, P, T, Z, or F A, D, G, P, T, Z, or F Blank Blank Blank A, D, G, P, T, Z, F, or Blank |
I I I Blank Blank T Blank |