** multiple variables
   :PROPERTIES:
   :DATE:     2011-06-27
   :END:

Should work call_concat(1, 2, 3) =123= in order.

#+name: concat
#+begin_src emacs-lisp :var a=0 :var b=0 :var c=0
  (format "%S%S%S" a b c)
#+end_src

Should be positive call_lob-minus(4, 3) =1= by order.