DATA itab { {TYPE [REF TO] type} 
          | {LIKE [REF TO] dobj} } OCCURS n 
          [WITH HEADER LINE]. 
This statement is forbidden in classes. It has exactly the same function as the following DATA statement for the declaration of a standard table and is replace by this also:
DATA itab { {TYPE STANDARD TABLE OF [REF TO] type} 
          | {LIKE STANDARD TABLE OF [REF TO] dobj} } 
          WITH NON-UNIQUE DEFAULT KEY 
          INITIAL SIZE n. 
          [WITH HEADER LINE].