[rules-users] is there anyway to access to lower level of an attribute in LHS

Hi group, Currently I have to use eval to access to lower lever of an attribute. For example: rule "test rule" when $person: Person () eval (($person.getContact() != null) && ($person.getContact().getEmail() == null)) then System.out.println ("Email address is missing") end Is there anyway not to use eval. I would like to do something like this: $person: Person ($contact: contact != null, $contact.getEmail() == null) but it throws errors Thanks, Tim