The File Section header is followed by file description entries or sort-merge file description entries consisting of a level indicator (FD and SD, respectively), a file-name and a series of independent clauses, terminated by a period. Each file description entry or sort-merge description entry is followed by one or more record description entries.
The file description entry and sort-merge file description entry (FD and SD) are the highest level of organization in the File Section.
A Format 1 (data item initialization) VALUE clause specified in the File Section is ignored except in the execution of the INITIALIZE statement.The initial value of a data item in the File Section is undefined.
File Description Entry
The file description entry furnishes information concerning the physical structure, identification and record names pertaining to a given file.
The level indicator FD identifies the beginning of a file description and must precede the file-name.
The clauses that follow the name of the file are optional and their order of appearance is not significant.
The LINAGE clause may be used only if file-name-1 references a sequential file. If the file description entry for a sequential file contains the LINAGE clause and the EXTERNAL clause, the LINAGE-COUNTER data item is an external data item. If the file description entry for a sequential file contains the LINAGE clause and the GLOBAL clause, the special register LINAGE-COUNTER is a global name.
One or more record description entries must follow the file description entry.
A file description entry must end with a period separator.
Sort-Merge File Description Entry
The sort-merge file description entry furnishes information concerning the physical structure, identification, and record-names of the file to be sorted or merged.
The level indicator SD identifies the beginning of the sort-merge file description and must precede the file-name.
The clauses that follow the name of the file are optional and their order of appearance is immaterial.
One or more record description entries must follow the sort-merge file description entry. Within the Procedure Division, file-name-1 may not be used in OPEN, CLOSE, READ, START, DELETE or UNLOCK statements, nor may subordinate record-names be used in WRITE or REWRITE statements.
|
|
Cobol Tutorial
Language Structure
Identification Division
Environment Division
Data Division
Procedure Division
Procedure Division Statements
Text Resumes
Visual Resumes
Social Resumes
Resume Quality
IT Resume Samples
MARKETING Resume Samples
HR Resume Samples
All rights reserved © 2018 Wisdom IT Services India Pvt. Ltd
Wisdomjobs.com is one of the best job search sites in India.