meta directive & OpenGraph

[Nicolas Friedli]

Hi,

I'd like to add meta OpenGraph informations in my Sphinx doc. The meta
rST directive could be a nice solution:

.. meta::
:description: The reStructuredText plaintext markup language
:keywords: plaintext, markup language

How can I use the meta directive with OpenGraph& obtain this output,
(with semi-colon in property...):

<meta property="og:title" content="The Rock" /> ?

Thx for your help.
-- Nicolas