Tonearm - 12:14 am on Feb 28, 2010 (gmt 0)

What about class="hproduct" on a td? What about something like class="hproduct otherstyle"? Are those OK?

Does anyone have any ideas on how Google might use this data?

Anywhere that product data may appear is a prime candidate for Microformats. Think of it this way, you have the existing HTML elements which help define a page or section it, semantically speaking that is. Then along comes Microformats which allows you to further refine the data within those elements, hence the term Microformats.

I'm struggling with this a little bit. If Google will use this product data as "rich snippets" like it does with reviews, I think I'm better off only using it on product detail pages and only to define the main product on that page. Otherwise, where does it stop? Should I use hproduct and title whenever I mention a product's title on a page? What if I mention the title and show the photo? What about a photo and a link only?

Considering how rich snippets work, isn't it better to send a clear signal regarding which product a page is about, if any?