I am working on tagging pages with schema to specify particular parts of a page.

Now, I have one intro. page with all products, then the page breaks down to individual pages for each product.

All Products > Product 1
All Products > Product 2
etc..

The 'All Products' page I wanted to tag with itempprop"owns" itemscope itemtype="http://schema.org/whatever" then itemprop="name" then itemprop="description". Descriptions are different on the product pages. Should I use product name & description schema for the individual item page or should I put it on both the intro page with all the products and then on the individual page.

I know Schema can be put on all pages for multiple things, but I just want to make sure i'm not convoluting the process and confusing the search engines.