A sequence number identifies each statement to be compiled by the COBOL compiler. The use of sequence numbers is optional, and may consist of any character in the character set of the computer. Sequence numbers may be in any order, and they need not be unique.
+-------------------------------IBM Extension--------------------------------+
You can use sequence checking at compilation time by specifying SEQUENCE.
If the NUMBER option is specified, the sequence numbers from columns 1 through 6 are used; otherwise the source sequence numbers provided in the source file are used.
+----------------------------End of IBM Extension----------------------------+
(C) Copyright IBM Corporation 1992, 2006. All Rights Reserved.