content: 
  on run argv
      tell document id (item 1 of argv) of application "Keynote"
          tell slide (item 2 of argv as number)
              set what to (item 3 of argv)
              if (what = "default title item") then
                 set the object text of the default title item to (item 4 of argv)
              else if (what = "default body item") then
                 set the object text of the default body item to (item 4 of argv)
              else
                  error "Cannot set unsupported text item"
              end if
          end tell
      end tell
  end run
  