Google Commerce Search Deployment Guide - Manual (Page 8)

A typical GCS data feed might contain the following attributes for most items:
Attribute Type Description
id required Think of id as your primary key. This has to be a
unique identifier. It doesn’t have to be a number - it
can be a SKU or product id.
link required The URL of the item.
title required Product Title, up to 70 characters.
description required Product Description, up to 10K characters
Almost exclusively used for search, not display, so
formatting is typically not that important.
price required If you have tiered pricing, use List Price here and
custom attributes to define other prices or a price
range.
condition required New or Used.
image_link required (for PS) Image URL for the Full Size Image.
quantity primary Quantity in Stock. Useful for ranking rules or sorting.
brand primary Brand or Manufacturer of product.
color primary (multi-value) Colors that item is available in (Red/Black/Green,
etc.).
size primary (multi-value) Sizes that item is available in (Small/Med/Large,
etc.).
thumbnail custom Link to thumbnail Image for search results.
featured custom Possibly used for ranking rule, or to display as a
different style.
Product variants
Product variants are options or attributes for a product, but typically they reference the same
top-level productid or sku. For example you might have an “Android Polo,” but it is available in
black or white, and in small, medium and large.
For Google Product Search, you might submit a separate URL for each variant of a product, but
with GCS you should just submit the variants as additional attributes to the same product. This
way, when someone searches for “android polo” they don’t get 6 items back, they just get the
one. Likewise, even if they search for “small android polo” they would still get the same result,
because “small” is a searchable attribute of the item.
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