Anything on codehaus.org is probably stale: the last release on codehaus was drools 2.x IIRC, and we're now beyond 5.3. Here's the official site: http://www.jboss.org/drools Here's the documentation (look for what you want to do in drools expert I presume) http://www.jboss.org/drools/documentation All source code is here, but there's a lot of source code :) https://github.com/droolsjbpm Op 02-02-12 09:44, tecshine schreef: -- With kind regards, Geoffrey De Smet

You will need to query the text of the rule from the database and then use the knowledge builder with a ByteArrayResource(rules.getBytes()) Something like this: KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); String rule = "package test;\n" + "import org.drools.mas.kmr2.mygridsharedclasses.MySerializableObject;\n" + "rule \"test\"\n" + " when\n" + " $o: MySerializableObject()\n" + " then\n" + " System.out.println(\"Rule Fired! -> Name: \"+$o.getName() + \"Age: \"+$o.getAge());\n" + " end\n"; kbuilder.add(new ByteArrayResource(rule.getBytes()), ResourceType.DRL); You need to do your homework and then comeback here if you have questions. Did you read the docs? Cheers --  - CTO @ http://www.plugtree.com  - MyJourney @ http://salaboy.wordpress.com  - Co-Founder @ http://www.jugargentina.org  - Co-Founder @ http://www.jbug.com.ar  - Salatino "Salaboy" Mauricio -