The Category query subject provides information about the category of a purchased item.
![](media/image36.png)
The Product query subject provides information about a product.
![](media/image37.png)
The Sku query subject provides information about an individual SKU.
![](media/image38.png)
The Catalog regular dimension includes one dimension, which allows you to traverse from Sku up to the Category.
![](media/image39.png)