Standard taxonomy of products XML, RDF and CVS file to download . (provided by google)
The Google product taxonomy is a tree of categories that describe product families. At the highest level, it is arranged into a few verticals, which refer to broad categories of products (Electronics, Home & Garden, etc.). The "children" of these broad categories are more specific product families (Electronics > Audio) or specific products (Electronics > Audio > Audio Players & Recorders > MP3 Players).