In the structure of the four parts of the program, the core module provides language functions for internal processing of data. At the same time, the core module also provides the function of defining a table of adjacent data items and accessing data items according to their positions in the table. The core module also provides debug functionality, which includes a compile-time switch and debug lines.
GB/T 4092.2-1992 history
2008GB/T 4092-2008 Information technology.Programming languages.COBOL