You use the Header Definition tab to define headers for rules files.
A header describes the contents of the data source and indicates how data-source fields are mapped to the target database.
Within a header, you can specify dimensions and members. The specified dimensions and members are used for each data-source record. A header can specify only one member per dimension. For example, Feb, Mar is an invalid header because it specifies two members of the Year dimension.
You can specify names in either of two ways:
In the “Name text” box, enter one or more member, dimension, or substitution variable names. Separate names with commas, and prefix substitution variables with ampersands (&).
Expand the Dimension node, and double-click one or more member and dimension names.
If necessary, click the Outline button to associate the rules file with an outline and populate the Dimension node.