How to set the analysis type of a data set column
This procedure assumes that you have already created a data object and added a data set to it.
In Edit Data Set, choose Output Columns, then double-click the column whose analysis type to set. Edit Output Column displays the properties of the selected column, as shown in Figure 3-10.
Figure 3-10  
In Analysis Type, select Dimension, Attribute, or Measure. If you select Attribute, in the list box that displays <Select Field Name...>, select a column of which this column is an attribute. The column you select must be a dimension column.

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