Labeling source lines in the sequence number area

The sequence number area can be used to label a source statement line. The content of this area can consist of any character in the character set of the computer.

The sequence number area of a JCL file is columns 73-80. When you enable sequence number management for JCL files, the location of the text in columns 73-80 is preserved as you modify text to the left of them. It also preserves the location of any characters in the comment continuation column, column 72.