[OASIS Issue Tracker] (ODATA-674) Specify navigation property binding combined with containment

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     [ https://issues.oasis-open.org/browse/ODATA-674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralf Handl updated ODATA-674:
-----------------------------

    Proposal: Allow NavigationPropertyBinding elements in structured types that specify containment navigation properties. Path and Target are interpreted relative to the structured type. Absolute targets in an entity container start with the qualified name of the container.

> Specify navigation property binding combined with containment
> -------------------------------------------------------------
>
>                 Key: ODATA-674
>                 URL: https://issues.oasis-open.org/browse/ODATA-674
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Bug
>          Components: Implementing OData, OData CSDL
>    Affects Versions: V4.0_OS
>            Reporter: Ralf Handl
>            Assignee: Ralf Handl
>              Labels: Gap, request_tc_discussion
>             Fix For: V4.01_WD01
>
>
> This combination is not explicitly covered in the specification.
> There are two sides to this problem: 
> - target entity sets for contained entities
> - contained entity sets as target entity sets
> Both problems can be solved by allowing <NavigationPropertyBinding> elements as children of the structured type that defines the containment navigation property.
> Example 1: navigation property of a contained entity targets a top-level entity set:
>   <NavigationProperty Name="Items" Type="Collection(Model.OrderItem)" ContainsTarget="true" />
>   <NavigationPropertyBinding Path="Items/Product" Target="Model.Container/Products"/>
> Example 2: assume an Order contains Items and Shipments, and an Item refers to a single Shipment of the same Order and vice versa. Using paths that start at the type defining the containment navigation property, the Target would be "Shipments" and "Items".
> <EntityType Name="Order">
>   <NavigationProperty Name="Items" Type="Collection(Model.OrderItem)" ContainsTarget="true" />
>   <NavigationPropertyBinding Path="Items/Shipment" Target="Shipments"/>  
>   <NavigationProperty Name="Shipments" Type="Collection(Model.Shipment)" ContainsTarget="true" />
>   <NavigationPropertyBinding Path="Shipments/ShippedItems" Target="Items"/>
> </EntityType>
> <EntityType Name="OrderItem">
>   <NavigationProperty Name="Shipment" Type="Model.Shipment" Partner="ShippedItems"/>
> </EntityType>
> <EntityType Name="Shipment">
>   <NavigationProperty Name="ShippedItems" Type="Collection(Model.OrderItem)" Partner="Shipment"/>
> </EntityType>



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