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You can place ruleset control statements in the postlude of a rule.

last

The last stops The last stops ruleset execution after the current rule.

This example will stop execution of the ruleset if the rule that this postlude is contained in fires.

fired

...

 { 
  last 
} 

This example will stop execution of the ruleset if the rule that this postlude is contained in fires and x is equal to 4.

fired {
 last if(x==4)
} 

The following construct ensures that no rules below the current rule will ever be executed:

always {

...

 last 
} 

The last control statement is used in the authorize-then-use pattern.