wrong validation of HTML+RDFa documents contains OpenGraph meta tags

We used W3c markup validator to validate documents contains OpenGraph  
A lot of these documents are buggy and not valid
We found that W3c markup validator is not complaining when:

OpenGraph properties into <META> tags use  a wrong attribute. They use  
name instead of property

Here is an url example of such document

To validate it we force XHtml+RDFa doctype

The namespace is declared

<html xmlns:og="http://opengraphprotocol.org/schema/"
and there are a few meta tags declared in such way
<meta name="og:title" content="Avatar (2009)" />
<meta name="og:site_name" content="IMDb" />

but there is no message indicates that there is something wrong with  
this meta tags

To help reproduce this issue I can provide the current source of this  
document if required


Received on Wednesday, 5 May 2010 13:12:41 UTC