I have an issue when testing a product page on http://www.google.com/webmasters/tools/richsnippets
I got the following errors :
In the first tab (hatom feed)
Erreur : Missing required field "updated".
Erreur : Missing required hCard "author".
In tab "item" where the description is a review by customer
Erreur : Incomplete microdata with schema.org.
So my rich snippet preview is without STARS/PRICE/NOTE/NB OF REVIEWS
Tks very much for any help !