This variable allows you to turn off key compression in C-ISAM files. By
default, the ACUCOBOL-GT interface to C-ISAM uses the key compression feature of
C-ISAM. But some C-ISAM emulators do not understand the compressed keys and
cannot read the files created. This variable allows you to turn off the
compression.
When the variable is set to "0", key compression is not used. When it's set
to "1" (the default), key compression is used. Note that this value is examined
each time a file is created, so its setting can be changed for each file. The
setting is meaningful only when the file is created. After that, the file
retains its compression mode.