[rules-users] Insert new facts in WorkingMemory event handler

Hi everyone, Do you know if it is possible to insert/modify/retract facts in a working memory event handler? Here is my use case actually: I want my users to be able to write rules like "When ... Then retract X" without having to bother with the consequences of retracting X on the other objects of the sessions (some of them might be retracted as well). These consequences can be expressed by rules, but I would like them to be kind of "part of the framework" and it would be easier for users if those rules were implicitly defined. Many thanks in advance for any hint, Best regards, Bruno.