Hibernate version: 2.1

I could not find a post related to this. Pardon me, if this or related question is already posted.

I have the following object hierarchy:

1. Order has orderId as Primary Key (PK). It may have one or more OrderDetail objects

2. OrderDetail has (orderId + orderLineNumber) as PK. Each OrderDetail may have one or more Tax objects

3. Tax has (orderId + orderLineNumber + taxTypeCode) as PK.

I was not able to define the <composite-id> for the Tax with OrderDetail as <many-to-one> relation.

How do we define this relationship in Hibernate when I need:

Option 1: Navigable from both directions
Option 2: Navigable from Order to OrderDetail to Tax

I am okay with list, set, map, or bag representation.

Thanks,

There are examples of this in the Hibernate3 test packages. (org.hibernate.test.cid, I think)