The following functions are available with the SMS DATACLAS update utility:
            
            
               
               - DLET deletes an item from the SMS DATACLAS
               
 
               
               - GN retrieves the next item in the SMS DATACLAS
               
 
               
               - GU retrieves a specific, named SMS DATACLAS
               
 
               
               - INSERT inserts a new item into the SMS DATACLAS
               
 
               
               - REPL replaces an existing named item in the SMS DATACLAS
               
 
               
            
            
            For example, for the ABC dataclass, the following command: 
            DATACLAS NAME(ABC) RECFM(FB) LRECL(80) FUNC(ISRT)
            
               
               - Inserts a new DATACLAS named ABC
 
               
               -  Sets the record format to FB
 
               
               - Sets the logical record length to 80 characters