The first step in using a relationship table is to add a new file to the Advanced folder in the Project Organizer. You can add as many relationship table files as you need. Depending on your project, you may need just one relationship table or many. For example, you might want to use Relationship Tables 1 and 2 when generating Target A, but you might want to use Relationship Table 3 when generating Target B.
How to add a relationship table file
Select Project>Advanced>Add Relationship Table.
The Add Relationship Table dialog opens.
In the Template Folders area, select one of the folders.
The Templates section to the right displays the relationship table file templates contained in the folder you selected.
In the Copy to Project dialog, click OK.
The relationship table file is added to the Advanced folder in the Project Organizer. The Relationship Table Editor opens to the right.
After you add a new relationship table file, you can create relationships between topics within that table. See Creating Relationship Tables.