[rules-users] Attribute activations vs object activations

I am sorry if this has already been answered, I tried a few different search combinations within this user forum and didn't find an answer. I am pretty new to Drools, but am no stranger to JESS and CLIPS. We are currently looking at moving over our product implementations from JESS to DROOLS. In looking at what it will take to do the conversion, and working with a few sample systems, i've noticed that DROOLS doesn't seem to support attribute activations, only object activations. What I mean by this is say that I have two rules..... rule "Rule 1" when $o : ObjectType (type == OBJECTTYPE.STATIC ) then System.out.println("ObjectType is Static"); end rule "Rule 2" when $o : ObjectType (active == false) then System.out.println("ObjectType not active"); end (My sample system is utilizing the default Drools 4.0 shadow fact support so as an ObjectType object is created I am calling memory.insert(obj, true) for dynamic updates.) If on external property change event occurs on an ObjectType:active attribute, both rules fire. Which to me signifies that if any attribute on the ObjectType object happens, all rules that contain ObjectType on the LHS of the rule will be re-evaluated (not re-fired, but re-evaluated). Now I realize these rules are simple and that I could code the rules in a way to avoid them being fired, but non the less, they would still need to be evaluated to the point where the engine realizes it should run. Instead, performance-wise, wouldn't it be more beneficial to only re-evaluate the rules that contain the attribute that changed that you are interested in? I.E. In the above scenario, only RULE 2 would fire because rule 1 doesn't contain the attribute that changed. The early versions of JESS did not support attribute activations (aka per slot activations), which was a major stumbling block. However ever since JESS 5.0, if I remember right, they've been included. So I guess my question is, does DROOLS support attribute activations and I am just blind? If Drools does not support this, is it scheduled to be supported in the future? Thank you in advance! Joshua