[rules-users] Category Rules - Guvnor

Hi Folks, I am looking at the category rules and have a scenario to use it. Goes like this Person Name String City String income int I want to categorize the rules in states -US -- NewYork -- Seatle -- SanFrancisco I have created 3 rules rule "people living in NY" when Person(city="NewYork" then end rule "people living in Seatle" when Person(city="Seatle" then end rule "people living in SFO" when Person(city="SanFrancisco" then end I associated the above rules with appropriate categories Then I create tax rules rule "ny tax" -- category "NewYork" when Person() then Log .. Tax = 10% end rule "WA tax" -- category "Seatle" when Person() then Log .. Tax = 20% end rule "ny tax" -- category "NewYork" when Person() then Log .. Tax = 10% end When I create a object in test scenario of person type .. then all the rules get executed.. The category rule is not having any effect Is there any documentation on how this works?? Thanks Amit