[rules-users] Drools fusion forward chaining

Hi guys , I am using the lastest version of DROOLS , i.e 5.0 , I am trying to achieve forward chaining with the new features of Fusion I was looking for examples about the different operators and how to make use of them but the broker example does not mention in it's DRL file any time related operators , i.e after , meets ... I would be grateful if you guys provide me with a simple example of forward chaining (sequence) My goal to achieve is to implement something like this : CmplxEvent :- a and then b and then c my drools rule is : rule "cmplx0" when $a : Event() $b : Event() Event(this after $b && $b after $a) then //whatever end however this does not work , it complains about "unable to create field exatractor" Event is an event that I have declared using declare Event and then the metadata @event as described in the docs. Thanks for help. Khalil Hafsi