Copybooks should be used only to share data definitions or logic. The following keywords relate to the nature or structure of a COBOL program, and
should be defined directly in the source code of the COBOL program:
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IDENTIFICATION DIVISION.
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PROGRAM-ID xxxxxxxx.
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AUTHOR. yyyyyyyyyyy.
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INSTALLATION. zzzzzz.
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DATE-WRITTEN. zzzzzz.
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DATE-COMPILED. zzzzzz.
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ENVIRONNEMENT DIVISION.
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CONFIGURATION SECTION.
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SOURCE-COMPUTER. xxxxxx.
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OBJECT-COMPUTER. xxxxxx.
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SPECIAL-NAMES. DECIMAL-POINT IS COMMA.
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I-O CONTROL.
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FILE-CONTROL.
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DATA DIVISION.
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FILE SECTION.
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WORKING-STORAGE SECTION.
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SCREEN.
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REPORT.
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INPUT-OUTPUT SECTION.
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LINKAGE SECTION.
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PROCEDURE DIVISION.
Noncompliant code example
IDENTIFICATION DIVISION.
DATA DIVISION.
LINKAGE SECTION.
COPY CSCEMOD1.
MOVE A TO B.
Compliant solution
IDENTIFICATION DIVISION.
DATA DIVISION.
LINKAGE SECTION.
COPY CSCEMOD1.
PROCEDURE DIVISION.
COPY CSCEMOD2.
MOVE A TO B.
