title: COBOL keyword REDEFINES
body: <p>May I ask, what is the usage of the keyword REDEFINES in COBOL?
  I can not understand the manual's definition.</p>
  
  <p>What is the meaning of the following code?</p>
  
  <pre><code> 01 WS_CHARGE_TXT_8X                             PIC X(08) VALUE "10000000".  
   01 WS_CHARGE_NUM_8 REDEFINES WS_CHARGE_TXT_8X.  
       05 WS_CHARGE_8                               PIC 9(05)V9(03).  
  </code></pre>
  
  <p>Thank you!</p>