I thought about adding that, but I feel like we would just be reimplementing java, in this case. So, if you need anything else other than simple java beans, you should implement it as a java class. Regarding the constructor, I might still add a constructor that receives all fields as parameters, just to reduce verbosity when using the java dialect, but if you are using mvel dialect, you can use "with": rule ... when ... then with( person = new Person() ) { name = "Bob", age = 35 } insert( person ); end Edson 2010/8/9 Tina Vießmann <tviessmann(a)stud.hs-bremen.de&gt; -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com