You can set breakpoints on rule expressions to facilitate a step-through analysis of the rules. When you have finished, you can remove individual breakpoints or remove all the breakpoints at once.
You can set breakpoints only on the parts of the rule that are executed, that is, function statements and rule actions. If you try to set a breakpoint on a line where breakpoints are meaningless, the breakpoint is set at the next valid line.
To set a rule breakpoint in a rule: