Adding two or more navigation in xsodata services ?

Hi,

I want to add navigation property to my oData services. I want to add two navigation property -

1. From Sales Order - to - Business Partner table

2. From Sales Order - to - Sales Order items table.

I can easily build one navigation. Let us say from Sales Order - to - Business Partner. What is the syntax to add the next navigation from Sales Order oData service ?

Example - to add one navigation ---

Filename - SalesOrder.xsodata

Code -

service {

    "empdemo.data::SalesOrder" as "SalesOrders" navigates ("SalesOrderBusinessPartner" as "BusinessPartners");

    "empdemo.data::BusinessPartner" as "BusinessPartners";

    association "SalesOrderBusinessPartner" principal "SalesOrders"("BusinessPartnerID") multiplicity "1"

    dependent "BusinessPartners"("BusinessPartnerID") multiplicity "1";       

}

How do I add the next navigation (From SalesOrder to SalesOrderItem table) in the same file ?