Not sure what type of data you expect to get back. Are you looking for all the objects that make up an "event" of just the fact (no pun intended) that the event has occured? Earnie! ________________________________ From: "Towler, Robert [RA]" <ROBERT.TOWLER(a)saic.com&gt; To: rules-users(a)lists.jboss.org Sent: Friday, April 17, 2009 11:19:31 AM Subject: [rules-users] Using rules engine to find patterns in time series data I’m looking at the rules engine as a mechanism to find patterns in some time series data. I’m looking for things like there where N spikes above a certain threshold value in a certain period of time. I was wondering if anyone has done this, or have any ideas on how best to do this with the rules engine. My own ideas & the prototype I’ve built seem to be really procedural, so I’m wondering if there’s a better way that I’m missing. Robert