Resource path navigation allows a query to reference a related entity from a parent or child entity. For example, with the following table structure, a customer's orders can be referenced from a Customer record, as shown below. 

Customer ---> Order ---> OrderItem
			|
			---> Contact

List the orders for a particular customer

https://<myserver>:<port>/api/odata4/OracleDS/Customers('3')/Orders

List the order items for a particular order for customer 3

https://<myserver>:<port>/api/odata4/OracleDS/Customers('3')/Orders('5')/OrderItems

Access a particular order item

https://<myserver>:<port>/api/odata4/OracleDS/Customers('3')/Orders('5')/OrderItems('6')

Access a particular property

https://<myserver>:<port>/api/odata4/OracleDS/Customers('3')/Name
https://<myserver>:<port>/api/odata4/OracleDS/Customers('3')/Orders('5')/OrderItems('6')/ItemName