Identifying a program

Use the IDENTIFICATION DIVISION to name a program and optionally provide other identifying information.

You can use the optional AUTHOR, INSTALLATION, DATE-WRITTEN, and DATE-COMPILED paragraphs for descriptive information about a program. The data you enter in the DATE-COMPILED paragraph is replaced with the latest compilation date.


IDENTIFICATION DIVISION.
Program-ID.    Helloprog.
Author.        A. Programmer.
Installation.  Computing Laboratories.
Date-Written.  05/31/2022.
Date-Compiled. 05/31/2022.

Use the PROGRAM-ID paragraph to name your program. The program-name that you assign is used in these ways:

  • Other programs use that name to call your program.
  • The name appears in the header on each page, except the first, of the program listing that is generated when you compile the program.
  • If you use the NAME compiler option, the name is placed on the NAME binder (linkage-editor) control statement to identify the object module that the compilation creates.
    Tip: Do not use program-names that start with prefixes used by IBM® products. If you use program-names that start with any of the following prefixes, your CALL statements might resolve to IBM library or compiler routines rather than to your intended program:
    • AFB
    • AFH
    • CBC
    • CEE
    • CEH
    • CEL
    • CEQ
    • CEU
    • DFH
    • DSN
    • EDC
    • FOR
    • IBM
    • IFY
    • IGY
    • IGZ
    • ILB
Tip: If a program-name is case sensitive, avoid mismatches with the name that the compiler is looking for. Verify that the appropriate setting of the PGMNAME compiler option is in effect.

Related references  
Compiler limits (Enterprise COBOL for z/OS® Language Reference)  
Conventions for program-names (Enterprise COBOL for z/OS Language Reference)