** access to variables set in property drawers
   :PROPERTIES:
   :special:  89
   :text: schulte
   :DATE:     2010-03-22
   :END:

: "(org-entry-get nil "special" t)"

#+begin_src emacs-lisp :var special=(string-to-number (org-entry-get nil "special" t))
  (+ special 1)
#+end_src

#+name:
: 90

#+begin_src emacs-lisp :var special=(org-entry-get nil "text" t)
  special  
#+end_src

#+name:
: schulte