Availability property inconsistencies

I’m seeing this: <a itemprop="availability" href="http://schema.org/InStock"></a>In stock
on: http://www.productontology.org/#examples

I thought it’s supposed to be: <link itemprop="availability" href="http://schema.org/InStock" />In stock

Which one is correct? Or doesn’t it matter?

Received on Friday, 20 July 2012 22:45:49 UTC