Library Routines - File and Filename Routines - Interpreting the return code as a file status code

Micro Focus Developer > Micro Focus Visual COBOL 3.0 for Visual Studio 2013 > General Reference > Library Routines > File and Filename Routines

In the doc, under the sub-heading "Interpreting the return code as a file status code",

... it has an pseudo-example, thus:

 01 file-status      pic xx comp-x.
 01 redefines file-status.
     03 fs-byte-1  pic x.
     03 fs-byte-2  cblt-x1-compx
   . . .
     call "CBL_xxx_xxx" using parameters
     if return-code not = 0
        move return-code to file-status
           . . .

What does the cblt-x1-compx mean?  If it is shown incorrectly or incompletely, how should it be shown?

Thanks