COBOL Manual for TNS/E Programs (H06.08+, J06.03+)

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 Chapter 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.
Linkage Section
The Linkage Section describes data passed from a calling program to the program containing the
Linkage Section. No local data space is used for these items because they refer to existing items
in the calling program.
01-data-description, 77-data-description
are described under Working-Storage Section, except that each data description entry can
include this clause:
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).
Topics:
• Data Description Entries and Initializing Data ItemsData Description Entries and Initializing
Data Items
• ACCESS MODE Clause
• CALL Statement and USING Phrase
Linkage Section 179