[rules-dev] A dazzling feature - not in Drools!

Just FYI, but who knows ;-) Our proprietary vintage RBS has a feature is (admittedly) rarely used but could come in handy, every now and then. Given this class class Element { int rank; // rank > 0 } and to fire a rule in ascending rank order, you can write (using modified Drools syntax) rule "fire in rank order 1,2,..." when Element( $rank : rank,... ) // ... salience -$rank ### <= then // ... end The dynamically set salience does all the work. (Of course, you can achieve the same order in Drools easily enough.) This is possible since salience is a value that must be carried over into the activation. There is at least one other rule attribute that shares this property, but I'm not sure whether anything useful can be done with dynamic agenda groups. Cheers -W