  INITIALIZE|INITIALISE identifier-1...
  ~~~~~~~~~~ ~~~~~~~~~~
      [ WITH FILLER ]
             ~~~~~~
      [ { category-name-1 } TO VALUE ]
        { ALL             }    ~~~~~
          ~~~
      [ THEN REPLACING { category-name-2 DATA BY
             ~~~~~~~~~                        ~~
            [ LENGTH OF ] { literal-1    } }... ]
              ~~~~~~      { identifier-1 }

      [ THEN TO DEFAULT ]
                ~~~~~~~