5.2 Data Division--File Description Entries
In a COBOL program, the File Description (FD) Entry (or Sort File Description (SD) Entry for sort/merge files) represents the highest level of organization in the File Section. The order in which the optional clauses follow the FD or SD entry is not important.
___ Format 1--Sequential Files ____________________________________________________
| |
| >>__FD__file-name-1__ __________________ __ ________________ ___________________> |
| |_ ____ __EXTERNAL_| |_ ____ __GLOBAL_| |
| |_IS_| |_IS_| |
| |
| >__ ___________________________________________________________________ ________> |
| |_BLOCK__ __________ __ _______________ __integer-2__ _CHARACTERS_ _| |
| |_CONTAINS_| |_integer-1__TO_| |_RECORDS____| |
| |
| >__ ____________________________________________________________________ _______> |
| |_RECORD__ _ __________ __integer-3__ ____________ ________________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_ __________ __integer-4__TO__integer-5__ ____________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_| clause 1 |__ ________________________________ _______| |
| |_DEPENDING__ ____ __data-name-1_| |
| |_ON_| |
| |
| >__ ________________________________________________________ ___________________> |
| |_LABEL__ _RECORD__ ____ ___ __ _STANDARD______________ _| |
| | |_IS_| | |_OMITTED_______________| |
| |_RECORDS__ _____ _| | <___________________ | |
| |_ARE_| |___ _______________ _|_| |
| |_ data-name-2 _| |
| |
| >__ ______________________________________________________ _____________________> |
| | <________________________________________ | |
| |_VALUE OF____system-name-1__ ____ __ _data-name-3_ _|_| |
| |_IS_| |_literal-1___| |
| |
| >__ _____________________________________________ ______________________________> |
| | <_____________ | |
| |_DATA__ _RECORD__ ____ ___ ____data-name-4_|_| |
| | |_IS_| | |
| |_RECORDS__ _____ _| |
| |_ARE_| |
| |
| >__ __________________________________________________________ _________________> |
| |_LINAGE__ ____ __ _data-name-5_ __ _______ __| clause 2 |_| |
| |_IS_| |_integer-8___| |_LINES_| |
| |
| >__ ___________________________________________ ________________________________> |
| |_ RECORDING __ ________ __ ______ __ mode _| |
| |_ MODE _| |_ IS _| |
| |
| >__ _________________________________ __.______________________________________>< |
| |_CODE-SET__ ____ __alphabet-name_| |
| |_IS_| |
| |
| clause 1: |
| |__ ____ __VARYING__ ____ __ ______ __ _____________________ ___________________> |
| |_IS_| |_IN_| |_SIZE_| |_ ______ __integer-6_| |
| |_FROM_| |
| |
| >__ _______________ __ ____________ ____________________________________________| |
| |_TO__integer-7_| |_CHARACTERS_| |
| |
| clause 2: |
| |__ ____________________________________________ _______________________________> |
| |_ ______ __FOOTING__ ____ __ _data-name-6_ _| |
| |_WITH_| |_AT_| |_integer-9___| |
| |
| >__ _________________________________________ __________________________________> |
| |_ _______ __ ____ __TOP__ _data-name-7_ _| |
| |_LINES_| |_AT_| |_integer-10__| |
| |
| >__ ____________________________________________ _______________________________| |
| |_ _______ __ ____ __BOTTOM__ _data-name-8_ _| |
| |_LINES_| |_AT_| |_integer-11__| |
| |
|___________________________________________________________________________________|
___ Format 2--Relative/Indexed Files ______________________________________________
| |
| >>__FD__file-name-1__ __________________ __ ________________ ___________________> |
| |_ ____ __EXTERNAL_| |_ ____ __GLOBAL_| |
| |_IS_| |_IS_| |
| |
| >__ ___________________________________________________________________ ________> |
| |_BLOCK__ __________ __ _______________ __integer-2__ _CHARACTERS_ _| |
| |_CONTAINS_| |_integer-1__TO_| |_RECORDS____| |
| |
| >__ ____________________________________________________________________ _______> |
| |_RECORD__ _ __________ __integer-3__ ____________ ________________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_ __________ __integer-4__TO__integer-5__ ____________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_| clause 1 |__ ________________________________ _______| |
| |_DEPENDING__ ____ __data-name-1_| |
| |_ON_| |
| |
| >__ ___________________________________________ ________________________________> |
| |_LABEL__ _RECORD__ ____ ___ __ _STANDARD_ _| |
| | |_IS_| | |_OMITTED__| |
| |_RECORDS__ _____ _| |
| |_ARE_| |
| |
| >__ ______________________________________________________ _____________________> |
| | <________________________________________ | |
| |_VALUE OF____system-name-1__ ____ __ _data-name-3_ _|_| |
| |_IS_| |_literal-1___| |
| |
| >__ _____________________________________________ __.__________________________>< |
| | <_____________ | |
| |_DATA__ _RECORD__ ____ ___ ____data-name-4_|_| |
| | |_IS_| | |
| |_RECORDS__ _____ _| |
| |_ARE_| |
| |
| clause 1: |
| |__ ____ __VARYING__ ____ __ ______ __ _____________________ ___________________> |
| |_IS_| |_IN_| |_SIZE_| |_ ______ __integer-6_| |
| |_FROM_| |
| |
| >__ _______________ __ ____________ ____________________________________________| |
| |_TO__integer-7_| |_CHARACTERS_| |
| |
|___________________________________________________________________________________|
X ___ Format 3--Line Sequential Files (Workstation Only) ____________________________ X | | X | >>__FD__file-name-1__ __________________ __ ________________ ___________________> | X | |_ ____ __EXTERNAL_| |_ ____ __GLOBAL_| | X | |_IS_| |_IS_| | | | X | >__ ____________________________________________________________________ __.___>< | X | |_RECORD__ _ __________ __integer-3__ ____________ ________________ _| | X | | |_CONTAINS_| |_CHARACTERS_| | | X | |_ __________ __integer-4__TO__integer-5__ ____________ _| | X | | |_CONTAINS_| |_CHARACTERS_| | | X | |_| clause 1 |__ ________________________________ _______| | X | |_DEPENDING__ ____ __data-name-1_| | X | |_ON_| | | | X | clause 1: | X | |__ ____ __VARYING__ ____ __ ______ __ _____________________ ___________________> | X | |_IS_| |_IN_| |_SIZE_| |_ ______ __integer-6_| | X | |_FROM_| | | | X | >__ _______________ __ ____________ ____________________________________________| | X | |_TO__integer-7_| |_CHARACTERS_| | | | |___________________________________________________________________________________|
___ Format 4--Sort/Merge Files ___________________________________________________________________
| |
| >>__SD__file-name-1__ ____________________________________________________________________ ____> |
| |_RECORD__ _ __________ __integer-3__ ____________ ________________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_ __________ __integer-4__TO__integer-5__ ____________ _| |
| | |_CONTAINS_| |_CHARACTERS_| | |
| |_| clause 1 |__ ________________________________ _______| |
| |_DEPENDING__ ____ __data-name-1_| |
| |_ON_| |
| |
| >__ _____________________________________________ _____________________________________________> |
| | <_____________ | |
| |_DATA__ _RECORD__ ____ ___ ____data-name-4_|_| |
| | |_IS_| | |
| |_RECORDS__ _____ _| |
| |_ARE_| |
| |
| >__ _______________________________________________________________________________ ___________> |
| |_ BLOCK __ ____________ __ ___________________ __ integer-2 __ _ CHARACTERS _ _| |
| |_ CONTAINS _| |_ integer-1 __ TO _| |_ RECORDS ____| |
| |
| >__ __________________________________________________________ ________________________________> |
| |_ LABEL __ _ RECORD __ ______ ___ __ _ STANDARD ________ _| |
| | |_ IS _| | |_ OMITTED _________| |
| |_ RECORDS __ _______ _| | <_______________ | |
| |_ ARE _| |___ data-name-2 _|_| |
| |
| >__ ______________________________________________________________ ____________________________> |
| | <______________________________________________ | |
| |_ VALUE OF ____ system-name-1 __ ______ __ _ data-name-3 _ _|_| |
| |_ IS _| |_ literal-1 ___| |
| |
| >__ __________________________________________________________________ ________________________> |
| |_ LINAGE __ ______ __ _ data-name-5 _ __ _________ __| clause 2 |_| |
| |_ IS _| |_ integer-8 ___| |_ LINES _| |
| |
| >__ _______________________________________ __._______________________________________________>< |
| |_ CODE-SET __ ______ __ alphabet-name _| |
| |_ IS _| |
| |
| clause 1: |
| |__ ____ __VARYING__ ____ __ ______ __ _____________________ __ _______________ _______________> |
| |_IS_| |_IN_| |_SIZE_| |_ ______ __integer-6_| |_TO__integer-7_| |
| |_FROM_| |
| |
| >__ ____________ ______________________________________________________________________________| |
| |_CHARACTERS_| |
| |
| clause 2: |
| |__ ____________________________________________________ ______________________________________> |
| |_ ________ __ FOOTING __ ______ __ _ data-name-6 _ _| |
| |_ WITH _| |_ AT _| |_ integer-9 ___| |
| |
| >__ _________________________________________________ _________________________________________> |
| |_ _________ __ ______ __ TOP __ _ data-name-7 _ _| |
| |_ LINES _| |_ AT _| |_ integer-10 __| |
| |
| >__ ____________________________________________________ ______________________________________| |
| |_ _________ __ ______ __ BOTTOM __ _ data-name-8 _ _| |
| |_ LINES _| |_ AT _| |_ integer-11 __| |
| |
|__________________________________________________________________________________________________|
Subtopics:
- 5.2.1 File Section
- 5.2.2 EXTERNAL Clause
- 5.2.3 GLOBAL Clause
- 5.2.4 BLOCK CONTAINS Clause
- 5.2.5 RECORD Clause
- 5.2.6 LABEL RECORDS Clause
- 5.2.7 VALUE OF Clause
- 5.2.8 DATA RECORDS Clause
- 5.2.9 LINAGE Clause
- 5.2.10 RECORDING MODE Clause
- 5.2.11 CODE-SET Clause
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