[hibernate-dev] [ORM] Query with condition on subclass attribute

Hi, Given the following inheritance hierarchy: @Entity public class Person { @Id private int id; ... } @Entity public class Employee extends Person { private String title; } Executing a query like the following succeeds. "from Person where title = 'abc'" I thought that it would fail because Person does not have an attribute named "title". Instead, the query succeeds and returns the Employee with the specified title. I don't see anything in the JPA spec that indicates whether this is portable. Does anyone know if this is portable? Thanks, Gail