Compioitions now work and the new Resource framework is committed. You can see the api in action here: http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-decisiontables... Along with the xml knowledge composition file it is loading: http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-decisiontables... The summarised version is: <composition xmlns='http://drools.org/drools-4.0/composition' xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' xs:schemaLocation='http://drools.org/drools-4.0/composition drools-composition-4.0.xsd' > <resource source='classpath:org/drools/decisiontable/composition1Test.drl' type='DRL' /> <resource source='classpath:data/IntegrationExampleTest.xls' type="DTABLE"> <decisiontable-conf input-type="XLS" worksheet-name="Tables_2" /> </resource> <resource source='classpath:org/drools/decisiontable/composition2Test.drl' type='DRL' /> </composition> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add( ResourceFactory.newClassPathResource( "composition1Test.xml", getClass()), KnowledgeType.COMPOSITION ); assertFalse( kbuilder.hasErrors() ); KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); XML Compisition files support all knowledge types, including other xml knowledge compositions. So one composition can reference and load other compositions. I'm not just updating the agent to take advantage of this. Mark