content: -- assign empty string to str
  set str to ""
  
  
  -- check if string is empty
  if str is "" then
  	-- str is empty
  end if
  -- or
  if id of str is {} then
  	-- str is empty
  end if
  -- or
  if (count of str) is 0 then
  	-- str is empty
  end if
  
  
  -- check if string is not empty
  if str is not "" then
  	-- string is not empty
  end if
  -- or
  if id of str is not {} then
  	-- str is not empty
  end if
  -- or
  if (count of str) is not 0 then
  	-- str is not empty
  end if
  