The functional sequence IO module provides the function of accessing file records according to the established sequence. This order is established by writing records to the file. The level feature provides local functions for the file control section, file description section and each section in the IO-CONTROL section, and the sequential IO at level 1. In the process department, for CLOSE, OPEN, READ, USE and WRITE statements, the first-level sequential IO provides partial functions, and provides complete functions for READ and REWRITE statements.
GB/T 4092.4-1992 history
2008GB/T 4092-2008 Information technology.Programming languages.COBOL
1992GB/T 4092.4-1992 Programming language COBOL—Sequential I-O module
GB/T 4092.4-1992 Programming language COBOL—Sequential I-O module was changed to GB/T 4092-2008 Information technology.Programming languages.COBOL.