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

The initially posted rules "1" and "2" are best practice. You are using a Production Rule Engine, and these rules are what they are made for. Doing it in an event handler is not impossible, but it requires you to implement logic which is (apparently) part of the application domain ("There must not be a T without at least one I." and "There must not be an I without its T.") and, moreover, logic which is readily available by the Engine's workings. Don't reinvent the wheel, just start rolling along. -W