Thanks Wolfgang! It worked. --- On Fri, 22/7/11, Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; wrote: From: Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; Subject: Re: [rules-users] temporal operator "includes" not working To: "Rules Users List" <rules-users(a)lists.jboss.org&gt; Date: Friday, 22 July, 2011, 11:29 AM Interval-based events must have a property for their duration (in ms), not the end time. @duration(duration) duration : long -W 2011/7/22 Neelesh Deo Dani <neeleshdev(a)yahoo.co.in&gt; Hi, I've following event declarations and rule: declare Event     @role(event)     @timestamp(datetime)     datetime : Date     name : String end declare Contest     @role(event)     @timestamp (startTimestamp)     startTimestamp : Date     endTimestamp : Date end rule "Contest" no-loop when        $e : Event(name == "event1")     $contest : Contest(this includes $e) then     System.out.println("rule Contest fired"); end The timestamps with Event and Contest objects are set as follows (before insert in state-full session):            // for Contest object            Calendar c = Calendar.getInstance();             c.set(2011, 7, 1);             contestType.set(contest, "startTimestamp", new Date(c.getTimeInMillis()));             c.set(2011, 7, 31);             contestType.set(contest, "endTimestamp", new Date(c.getTimeInMillis()));             // for Event object              c.set(2011, 7, 3);              eventType.set(event, "datetime", new Date(c.getTimeInMillis())); The condition "this includes $e" in LHS doesn't get evaluated to true and RHS doesn't get executed. If I change it to "$contest.startTimestamp before $e, $contest.endTimestamp after $e"  which has the same meaning then it works fine. Please help in resolving the issue. Thanks & Regards, Neelesh _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -----Inline Attachment Follows----- _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users