[OASIS Issue Tracker] (ODATA-960) Absolute paths in annotations, e.g. capabilities depending on properties of a singleton

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

    [ https://issues.oasis-open.org/browse/ODATA-960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=64378#comment-64378 ] 

Ralf Handl commented on ODATA-960:
----------------------------------

In $filter we are addressing resources in the service, so $root logically is the entity container, and the next segment after $root is a direct child of the entity container, e.g. an entiy set.

In annotation paths we are addressing model elements so / logically is the universe, and the next segment after / is the schema that contains the model element we want to address (assuming that schema namespaces are universally unique :-)

So I would not use $root in the annotation context.

> Absolute paths in annotations, e.g. capabilities depending on properties of a singleton
> ---------------------------------------------------------------------------------------
>
>                 Key: ODATA-960
>                 URL: https://issues.oasis-open.org/browse/ODATA-960
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: Vocabularies
>    Affects Versions: V4.0_ERRATA02
>         Environment: Annotations
>            Reporter: Ralf Handl
>             Fix For: V4.01_WD01
>
>
> We'd like to use a Singleton to control capabilities of an entity set, e.g. use a property of a singleton to tell whether the authenticated user is allowed to create new entities in a given entity set. This means we'd like to use a Path construct for the value of @Capabilities.InsertRestrictions/Insertable, e.g.
> <Annotations Target="My.Container/SalesOrders">
>   <Annotation Term="Capabilities.InsertRestrictions">
>     <Record>
>       <PropertyValue Property="Insertable" Path="/My.Container/Me/Permissions/CanCreateOrders" />
>     </Record>
>   </Annotation>
> </Annotations>



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