Paul - Drools does not appear to have done well on those benchmarks, but the paper does not seem to mention which version of Drools was used. Did I miss that? Do you know which version it was? Tom Murphy Business Process Consultant Wells Fargo HCFG - CORE Deal Decisioning Platform 800 S. Jordan Creek Parkway | West Des Moines, IA 50266 MAC: X2301-01B Office: 515 324 4853 | Mobile: 941 320 8014 This message may contain confidential and/or privileged information.  If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein.  If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message.  Thank you for your cooperation. -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of rules-users-request(a)lists.jboss.org Sent: Friday, April 17, 2009 4:14 PM To: rules-users(a)lists.jboss.org Subject: rules-users Digest, Vol 29, Issue 45 Send rules-users mailing list submissions to rules-users(a)lists.jboss.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.jboss.org/mailman/listinfo/rules-users or, via email, send a message with subject or body 'help' to rules-users-request(a)lists.jboss.org You can reach the person managing the list at rules-users-owner(a)lists.jboss.org When replying, please edit your Subject line so it is more specific than "Re: Contents of rules-users digest..." Today's Topics: 1. Re: Comparison info with other engines (Paul Fodor) 2. RE: Comparison info with other engines (Ingold, Jonathan) 3. Re: Negation semantics in Drools (Paul Fodor) ---------------------------------------------------------------------- Message: 1 Date: Fri, 17 Apr 2009 16:25:43 -0400 From: Paul Fodor <paul.i.fodor(a)gmail.com&gt; Subject: Re: [rules-users] Comparison info with other engines To: Rules Users List <rules-users(a)lists.jboss.org&gt; Message-ID: <7641b8a40904171325u26d00b89h8ac857ee4d093416(a)mail.gmail.com&gt; Content-Type: text/plain; charset="iso-8859-1" 2009/4/17 Lindy hagan <lindyhagan(a)gmail.com&gt; It has to be a production rule system or any rule system (logic programming, deductive databases, triples rule engines)? Check the benchmarks at: http://rulebench.projects.semwebcentral.org The benchmarks may have features which you might not need, and not all the tested systems are free. Its main goal was to compare technologies, but it might help you decide what system you want. Regards, Paul Fodor