Hi, What is the best way of writing such a rule in drools 4.0 without using eval ? In the following rule 'date' is a global variable for my own dateUtil class and {year} is the variable I will pass. brotherDOB != null, $brotherDOB : brotherDOB eval(boy.getYearBorn() < (date.yearOfDate($brotherDOB)-{years})) Saleem Lakhani _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users