Organization

Although it is not mandatory, the Procedure Division for a compilation unit is usually written as several consecutive sections, each of which is composed of a series of statements which, taken together, perform a particular function. When segmentation is used, the entire Procedure Division must be in sections. In addition, each section must be classified as belonging either to the fixed portion of the program or to one of the independent segments of the program. On the other hand, segmentation in no way affects the need for qualification of procedure-names to ensure uniqueness.