These attributes determine how the automatic data segment can be shared:
NONE
No automatic data segment is created.
SINGLE
A single automatic data segment is shared by all
instances of the module. In this case, the module is said to have solo
data. This keyword is the default for dynamic-link libraries.
MULTIPLE
The automatic data segment is copied for each instance
of the module. In this case, the module is said to have instance data.
This keyword is the default for applications.
These attributes refer to initialized global data. The automatic data segment
is the physical segment represented by the group name DGROUP. This segment
group makes up the physical segment that contains the local stack and heap
of the application.
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