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We now support PATCH request with application/json-patch+json [0] and application/merge-patch+json media types. The support is based on some customized usage of the FGE JSON Patch library [2]. As we need to apply the patch to an existing object, we need translate the JSON Patch remove operation into a replace operation setting the value to null so that out entity processing component registers the request for removal. Same applies to requests for merge-patch+json. From an implementation point of view the handling of the media type has moved from the controller into PersistentEntityResourceHandlerMethodArgumentResolver and its delegates, n particular JsonPatchHandler. The application of the changes to the existing domain object is handled in the newly introduced DomainObjectReader. Related ticket: DATAREST-345. [0] http://tools.ietf.org/html/rfc6902 [1] http://tools.ietf.org/html/draft-ietf-appsawg-json-merge-patch [2] https://github.com/fge/json-patch