I have same functions that is used on two rule files (.drl), is it possible to share the functions without write it twice.. ? Example : ------------------- file: rule1.drl rule "rule_on_file_1" when .... call_function(); end -------------------- file: rule2.drl rule "rule_on_file_2" when .... call_function(); end --------------------- call_function is a drool function : function call_function() { .... }