This variable provides an alternate method for determining which LINE SEQUENTIAL files will have trailing spaces removed from records written to them. At the time a LINE SEQUENTIAL file is opened, the value of this variable is examined. If this variable is 1 (on, true, yes), then automatic space suppression is applied to this file.
Otherwise, the file is processed according to the normal rules, as described in Sequential Files. The default value for this variable is 0 (off, false, no).
Note that a related configuration variable is the EXTFH_KEEP_TRAILING_SPACES variable.