Each data dimension is sub-divided into levels. For example, the Location dimension is divided into 3 levels. The first is the "continent" level, which contains two members: North America, and Europe. Then within each of these member levels, there are one or more child members at the "nation" level. In addition to this, there are two measures: Total Sales and Expenses. These measures exist at the intersection of the three data dimensions.
As displayed in Figure 2, some cells in the cube may not contain valid information.