Symbolic Names in the Report Writer 
A symbolic name can represent the row or column coordinate for a single cell or a range of cells within a report. The system uses cells to determine locations within the column-row matrix of a report. For more information, see
Defining Cells.Symbolic names are defined within sets. You can assign symbolic names to:
Set line symbolic names refer to a value or a set name in a set line. For basic, data, and single-dimension sets, you define set line symbolic names using the Symbolic Name field on the Create and Change Set:Basic Entries screens.
Set line symbolic names can also be used in multi-dimension sets, for example, for set variables that have been entered directly into a multi-dimension set. You enter symbolic names for set lines under Create Set: Basic Entries and Change Set: Basic Entries. This way you can address the highest row total in cell calculations.

The symbolic name that you assign to a set line in a multi-dimension set does not overwrite existing header symbolic names, which have been defined in the set entered in the multi-dimension set. Instead, two symbolic names exist for the set line and the set header.
Set header symbolic names refer to all values within a set. For basic, data, and single-dimension sets, you define symbolic names for the entire set using the Symbolic name field on the Create and Change Set: Header screens.