Methods and apparatus, including computer program products, for interacting with a user to define business rules in a declarative manner. The invention operates to display a rule set as an editable list of conditions and an editable list of actions, the conditions and actions being linked to each other by the combination of an editable list of if-values and an editable list of then-values, wherein if-values and then-values are explicitly linked to each other, conditions and if-values are explicitly linked to each other, and then-values and actions are explicitly linked to each other in the displayed lists.