This is a text description of simpagg.gif. This figure illustrates the aggregation of data values from a lower level in a dimension hierarchy to a higher level. In the figure, a box represents the higher, aggregate, level. In the box is the number 9. Below the box are three other boxes that represent the lower, detail, level. In the box on the left is the number 2, in the middle box is the number 3, and in the box on the right is the number 4. From the top of each detail level box an arrow points to the aggregate level box.