Re: [rules-users] How check if all the values in a collection match a criteria

Hmm, now that you mentioned, I see that our parser is limiting the forall() CE, not allowing nested "from" CEs. This is something we should fix, since the limitation is purely a parser limitation. Anyway, for your case, the workaround is simply to use the "raw" forall-equivalence: not( A() and not( B() ) ). So try this: rule "Do Not Process TAX" when $report: ExpenseReport($expenseDetails: expenseDetails) not ( $ed : ExpenseDetails() from $expenseDetails and not ( ExpenseDetails( this == $ed, expenseType == ExpenseType.TAX ) from $expenseDetails ) ) then System.out.println("################ It works ##################"); insertLogical("Bypass Process"); end This is just more verbose than the forall, but it is exactly the same. Once the parser is fixed, you will be able to simply write: rule "Do Not Process TAX" when $report: ExpenseReport($expenseDetails: expenseDetails) forall ( ExpenseDetails( expenseType == ExpenseType.TAX ) from $expenseDetails ) then System.out.println("################ It works ##################"); insertLogical("Bypass Process"); end BTW, may I ask you please to open a JIRA so we don't forget to fix this for 5.0? Thanks, Edson 2008/5/18 Alessandro Di Bella <aldibella(a)gmail.com&gt;: -- Edson Tirelli JBoss Drools Core Development Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com