COBOL Manual for TNS/E Programs (H06.03+)

Data Division
HP COBOL Manual for TNS/E Programs—520347-003
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Data Description Entries and Initializing Data Items
There are limits to the number of records and level-77 items that a program can
contain. See Section 20, HP COBOL Limits.
66-or-88
is a level-66 or level-88 description. For syntax, see Descriptions That Rename
Items (Level 66) and Descriptions of Condition-Names for Values (Level 88).
The Extended-Storage Section, if present, must appear after any Working-Storage
Section. A program can have both sections, either section without the other, or neither
section.
Data Description Entries and Initializing Data Items
Data description entries and data initialization rules are the same in the Extended-
Storage Section as they are in the Working-Storage Section. See Data Description
Entries and Initializing Data Items.
Addressing
Items described in the Extended-Storage Section are accessed using 32-bit
addressing. Extended-storage items are allocated in a single extended data segment,
which is managed entirely by the run-time routines. Instructions that involve 32-bit
addresses consume more space in the object file and execute at a slightly slower
speed than the instructions that involve 16-bit addresses.
Size Limits
In Section 20, HP COBOL Limits, see Data in a run unit.
Checkpointing
If your program is compiled with the COBOL85 compiler and the ENV COMMON
directive, the CHECKPOINT statement can process data items declared in the
Extended-Storage Section.