Let me understand you better. The events do not contain any information about source other than what can be implied from their temporal position? Source 1 : 0s, 15s, 30s, 35s etc Source 2: 5s, 20s, 35s, 40s etc What if the period between events for a specific source were greater than 15s (as you state) which caused an overlap with another source? Source 1: 0s, 15s, 35s, 40s etc Source 2: 5s, 20s, 35s, 40s etc I would have thought without being able to ascertain source from the event Fact it would be almost impossible to achieve your use-case. With kind regards, Mike -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of skasab2s Sent: 12 September 2009 11:54 To: rules-users(a)lists.jboss.org Subject: [rules-users] Drools Fuson and Deltas (differences) Hi guys, I have the following problem, which I'm trying to solve with Drools-Fusion: Every 15 seconds(or more) happens an event, that contains an unique number. For example every 15 seconds(or more) comes a Temperature of a patient with a new different value as an event. The problem is, that it is possible, that between two of those Temperatures other Temperatures from a differrent source appear: Second 0: Nothing ... Second: 15: Temperature: 37.5 ... Second: 20 Temperature 38.8 ... Second: 30 Temperature: 36.5 Is it possible with Drools Fuzion to detect that Temperature 38.8 is from other source (because it has happended between the 15th and 30th second) and calculate the difference between the temperature 38.8 and 37.5 (in this case)? Thanks a lot! Svetlomir. -- View this message in context: http://www.nabble.com/Drools-Fuson-and-Deltas-%28differences%29-tp254134 21p25413421.html Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users