[babel] Using Property Drawers to Pass Values to a Variable

[Ian Barton <lists@wilkesley.net>]

I am trying to pass a variable value to a latex source code block:

* Letter.
:PROPERTIES:
:first_name: Ian
:last_name: Barton
:END:

#+begin_src latex var: last_name =(org-get-entry nil "last_name")

#+end_src

However, it appears as though it's only supported for lisp. Any 
suggestions as how to do this?

I am trying to construct a business letter template using the KOMA 
scrlttrs class. I have got the letter looking the way I want it in tex. 
I propose to use babel to produce the tex, but need a way to pass 
variables stored in my org file to the various komavar.

I have tried org-koma-letter.el, which isn't quite flexible enough for 
my needs. I know there have been several postings in the list about 
using KOMA. If anyone is interested I found this 
http://stefano.italians.nl/archives/55 site a great help in getting my 
design the way I wanted it.

Ian.