[OASIS Issue Tracker] Commented: (ODATA-32) Allow filtering of expanded to-many navigation properties

[ http://tools.oasis-open.org/issues/browse/ODATA-32?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=31861#action_31861 ] 

Michael Pizzo commented on ODATA-32:
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I don't think we should allow the same navigation property to be specified multiple times in a $expand. This was required for the path syntax but is not required, and offers ambiguity, with the new format (i.e., what if I have two $expands for the same navigation property with different $filters applied?)

> Allow filtering of expanded to-many navigation properties
> ---------------------------------------------------------
>
>                 Key: ODATA-32
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-32
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: New Feature
>          Components: OData URL Conventions v1.0
>    Affects Versions: WD01
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>            Assignee: Ralf Handl
>             Fix For: WD01
>
>
> "Give me all open purchase orders and expand all items that have a weight of over five tons"
> This cannot be expressed as a query on the items if these are contained in the orders.
> Even if the items are not contained, the reformulation as a query on items expanding the order would repeat the included order entities in case of multiple matching items, which is undesirable.

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