Hi everybody Short presentation since this is my first time posting there. I am a french engineering student at the end of his studies, and I am currently working as a trainee on a project where I have to make a lot of software working together. I am currently studying a way to correlate alarms sent by a lot of equipements from a network (type NMS), using openOSS' correlation module, which was using drools 2.0 beta 2.1 But since it seems the current stable version is drools 4.0, I am thinkint about using it instead. But if I do so, I will have to bother about ascendant compability. The programm from openOSS is using drools through JSR94 interface. Do you think there will be any problem? Where can I find a good page relating major changes in drools since drools 2.0? Other question: my project is really ambitious, and I plan to use rules which will adapt to the topology of the network. Depending on what is possible in drools, I am thinking about creating a program which will use a file containing static rules and another one containing the topology of the network to remotely generate new rules each time I change the network topology. But maybe this dynamic rule generation is already available in drools? What do you think? Thank you very much Aldian