From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thorsten Jolitz <tjolitz@gmail.com>
Subject: Override global export-option prop:t
Date: Wed, 09 Apr 2014 22:50:18 +0200
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Hi List, 

This minimal Org buffer "tmp<2>"

,----------------------------
| #+OPTIONS: prop:t
| 
| * A
|   :PROPERTIES:
|   :EXPORT_OPTIONS: prop:nil
|   :END:
| 
| C
| 
| * B
|   :PROPERTIES:
|   :DESCRIPTION: Headline B
|   :END:
| 
| D
`----------------------------

exports to

,-------------------------------
| tmp<2>
| 
| Table of Contents
| 
|   * 1. A
|   * 2. B
| 
| 1 A
| 
| EXPORT_OPTIONS: prop:nil
| 
| C
| 
| 2 B
| 
| DESCRIPTION: Headline B
| 
| D
| 
| Author: Thorsten Jolitz
| 
| Created: 2014-04-09 Mi 22:44
| 
| Emacs 24.3.1 (Org mode 8.2.5h)
| 
| Validate
`-------------------------------


but I would have expected that the options node-property prop:nil
overrides the global option prop:t. 

Bug or wrong usage?

-- 
cheers,
Thorsten