When you associate an attribute dimension with a standard dimension, the standard dimension is the base dimension for that attribute dimension.
An attribute dimension must be associated with a sparse standard dimension.
A standard dimension can be a base dimension for multiple attribute dimensions.
An attribute dimension can be associated with only one base dimension.
For example, you might have a Size attribute dimension with members Small, Medium, and Large. If you associate the Size attribute dimension with the Product dimension, you cannot also associate the Size attribute dimension with the Market dimension. Tracking size-related information for the Market dimension requires another attribute dimension with a different name; for example, MarketSize, with the MarketSize attribute dimension associated with the Market dimension.