By default, a rule specification contains a primary rule set. Add a rule set under the primary rule set or under another rule set in the rule specification.
Open the rule specification in the Design workspace.
Select a rule set shape as a parent for the rule set that you create.
The
Add Rule Set
button appears at the base of the rule set shape.
Click the button to add a rule set.
The Analyst tool adds a rule set shape below the parent rule set.