[OASIS Issue Tracker] (ODATA-825) AnnotationPath and Path expression: traversal of multiple collection-valued scalar or navigation properties

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

     [ https://issues.oasis-open.org/browse/ODATA-825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Zurmuehl updated ODATA-825:
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        Summary: AnnotationPath and Path expression: traversal of multiple collection-valued scalar or navigation properties  (was: AnnotationPath expression: traversal of multiple collection-valued scalar or navigation properties)
    Description: 
When applying https://issues.oasis-open.org/browse/ODATA-418 we missed to adapt CSDL 14.5.2. (edm:AnnotationPath) and 14.5.12 (edm:Path).  Both sections restricts path expressions to contain at most one multi-valued  structural or navigation property.

Since an AnnotationPath traverses the object graph on structural level not on instance level, the cardinality of  structural or navigation properties is not relevant. The same holds true for a Path expression as long as it resolves to a term cast. 


  was:
When applying https://issues.oasis-open.org/browse/ODATA-418 we missed to adapt CSDL 14.5.2. (Specification of edm:AnnotationPath).  restricts path expressions to contain at most one multi-valued navigation property which can only be followed by a single type cast or term cast.

This is overly restrictive: drilling into a complex type path after a navigation is straight-forward, and even multiple multi-valued navigations could be resolved by building the union of all targeted collections.


> AnnotationPath and Path expression: traversal of multiple collection-valued scalar or navigation properties
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: ODATA-825
>                 URL: https://issues.oasis-open.org/browse/ODATA-825
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData CSDL
>    Affects Versions: V4.0_ERRATA02
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>            Assignee: Michael Pizzo
>             Fix For: V4.0_ERRATA03
>
>
> When applying https://issues.oasis-open.org/browse/ODATA-418 we missed to adapt CSDL 14.5.2. (edm:AnnotationPath) and 14.5.12 (edm:Path).  Both sections restricts path expressions to contain at most one multi-valued  structural or navigation property.
> Since an AnnotationPath traverses the object graph on structural level not on instance level, the cardinality of  structural or navigation properties is not relevant. The same holds true for a Path expression as long as it resolves to a term cast. 



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