[ https://issues.oasis-open.org/browse/ODATA-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=62087#comment-62087 ]
Michael Pizzo commented on ODATA-613:
-------------------------------------
In GET, the $expand specifies the extent of the graph, and any changes/added/deleted links or tombstones are valid for any members of that graph.
For PATCH, you don't specify a $expand so the extent of that graph is undefined. Therefore, it is presumably valid to have added/deleted links to anything reachable from the target.
> Allow PATCH to entity sets using the delta-response format
> ----------------------------------------------------------
>
> Key: ODATA-613
> URL: https://issues.oasis-open.org/browse/ODATA-613
> Project: OASIS Open Data Protocol (OData) TC
> Issue Type: Improvement
> Components: OData JSON Format, OData Protocol
> Affects Versions: V4.0_OS
> Environment: Set Operations, [Proposed]
> Reporter: Ralf Handl
> Assignee: Ralf Handl
> Labels: Usability
> Fix For: V4.01_WD01
>
>
> This will allow easy synchronization between services with same model
> Previous proposal (for sanity check):
> Document changes:
> part1-protocol
> Add section: 11.4.10 Update an Entity Set
> To update a collection, the client sends a PATCH request to that collection's URL. The PATCH body MUST contain a valid delta response consisting of appropriate representations for
> If the target URL for the collection is a navigation link, any added entity is automatically linked to the entity containing the navigation link, and any deleted entity is automatically unlinked.
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