The COBOL editor supports automatic numbering of sequence numbers. The COBOL editor supports the following two patterns of sequence numbers:
Pattern A
Every line in a file has a six-digit sequence number, and the lines are sorted in ascending order.
Pattern B
Patterns other than pattern A.
Sequence numbers can be edited. The following table describes the operation of the COBOL editor when lines are numbered manually.
Adding a new line at the end of a file | In pattern A, the sequence number for a new line is the sequence number of the last line plus the increment value. If the calculated value is greater than 999999, 1 is set as the increment value. If a line is being added after the line whose sequence number is 999999, the numbering is switched to pattern B. In numbering in pattern B, a six-byte space is assigned for the sequence number area of the newly line. |
Inserting a new line | In pattern A, the sequence number for a new line is the sequence number of the previous line plus the increment value. If the calculated value is the sequence number of the next line or greater, 1 is set as the increment value. However, if adding 1 to the sequence number of the previous line results in a value equal to or greater than the sequence number of the next line, the next and subsequent lines are renumbered. In pattern B, a six-byte space is assigned for the sequence number area of the new line. |
Deleting a line | When a line is deleted, lines are not renumbered. |
Pasting a line | The processing is the same as for inserting a new line. |
Note
Sequence numbers are not targeted in revision history comparisons. Therefore, simply reassigning sequence numbers does not correct them. However, when replacing from a revision history, the sequence numbers are also replaced.
