[OASIS Issue Tracker] Commented: (ODATA-513) Special handling of derived types in the dynamic expression edm:Record. Why?

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    [ http://tools.oasis-open.org/issues/browse/ODATA-513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=34754#action_34754 ] 

Ralf Handl commented on ODATA-513:
----------------------------------

Unfortunately this does not work with collection-valued annotations:

<Annotation Term="My.SalesPeople">
  <Collection>
    <Record>
      ... property values for salespersontype go here...
    </Record>
    ...
  </Collection>
</Annotation>

With the current rule required properties of persontype can be omitted, making it impossible to instantiate the salespersontype with the provided information.

And unfortunately this is not an edge case; we've encountered this pattern several times.

> Special handling of derived types in the dynamic expression edm:Record. Why?
> ----------------------------------------------------------------------------
>
>                 Key: ODATA-513
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-513
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Bug
>          Components: OData CSDL
>    Affects Versions: V4.0_CS01
>         Environment: [Proposed]
>            Reporter: Martin Zurmuehl
>             Fix For: V4.0_CSD03
>
>
> We have defined a special handling of derived types in dynamic expression edm:Record:
> 14.5.14 Expression edm:Record
> The edm:Record expression enables a new entity type or complex type instance to be constructed.
> A record expression contains zero or more edm:PropertyValue elements. For each single-valued property of the record construct's type that is neither nullable nor specifies a default value an edm:PropertyValue child element MUST be provided. For derived types this rule applies only to properties directly defined by the derived type. For collection-valued properties the absence of an edm:PropertyValue child element is equivalent to specifying a child element with an empty collection as its value.
>  
> For me this special handling of the derived types looks superfluous. 

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