[OASIS Issue Tracker] (ODATA-1149) Support Delta responses for Singletons

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

    [ https://issues.oasis-open.org/browse/ODATA-1149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=69268#comment-69268 ] 

Ralf Handl commented on ODATA-1149:
-----------------------------------

George: no array, just one "delta object"
Ralf: need new context URL pattern to distinguish this from "full object"

> Support Delta responses for Singletons
> --------------------------------------
>
>                 Key: ODATA-1149
>                 URL: https://issues.oasis-open.org/browse/ODATA-1149
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Bug
>          Components: JSON Format, Protocol
>    Affects Versions: V4.01_CS01
>         Environment: [Proposed]
>            Reporter: Michael Pizzo
>             Fix For: V4.01_CS02
>
>
> Today we are a bit unclear about whether or not deltas are supported for singletons.  
> In 11.3 Requesting Changes of the Protocol document, we say:
> "Any GET request to retrieve one or more entities MAY allow change-tracking."
> However, in 15.1 Delta Response of the JSON document we say:
> "Responses from a delta request are returned as a JSON object. The JSON object MUST contain an array-valued property named value containing all added, changed, or deleted entities, as well as added links or deleted links between entities, and MAY contain additional, unchanged entities."
> The wording from the JSON spec makes sense for 4.0, since changes to related entities and links were represented in a flattened result, but with the ability to represent nested related content, it is useful to support a delta payload (GET or PATCH) for requests anchored on a single node.



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