Control Data Corporation 3300 Reference Manual page 13

Environment Division contains information about the equipment used to compile and execute the pro-
gram. Its primary function is to assign each data file by name to an input-output device and to
specify any special input-output techniques.
Data Division contains a full description of the data to be processed by the object program. In the
File Section, it describes the data items that make up each of the files named in the Environment
Division. In the Working-Storage section it describes the data items used for constants and for data
developed during execution of the program. If the program is divided into subprograms, the Common-
Storage Section contains deSCriptions of data common to more than one subprogram. The Report
Section contains a description of data to be output on a printed report in terms of the format in which
it will be presented.
Data Division entries show how data items are grouped and organized into files and records. Data
names, level numbers, pictures, and other information are contained in these entries.
Procedure Division specifies the actions required to process the data and it indicates the sequence
of processing. The basic functions of this division are input-output, arithmetic, data movement.
and sequence control. In addition, it provides the user with the capability to sort files, search
tables, and write reports.
REFERENCE FORMATS
Each COBOL entry is described in terms of a reference format. Throughout this manual a format
is shown adjacent to information defining the entry. When more than one specific arrangement is
permitted, the format is separated into numbered formats.
Notation Used
in
Reference Formats
UPPER CASE
UNDERLINED UPPER CASE
lower-case-words
level numbers
[ ] Brackets
60229400
words are COBOL reserved words. They must be spelled
correctly including any hyphens and may not be used in a
source program except as speCified in the reference formats.
words are required when the format in which they appear
is used. They define the action of the compiler.
are generic terms which represent the words or symbols
supplied by the user. When generic terms are repeated
in a format, a number or letter is appended to the term for
identification.
are one- or two-digit numbers that precede entries in the
Data Division to indicate the hierarchy level of entries.
enclose optional portions of a reference format. All of the
format within the brackets may be omitted or included at
the user's option.
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