[Fiware-ngsi] proposed expansion of NGSI-10

[Bisztray, Denes (NSN - HU/Budapest)]

Dear all,

 I checked the RESTful binding proposal created by Tobias an Laurent. I completely understand that the NGSI-10 standard allows only a mass-update of the context entities via the updateContextRequest. 

  What I propose is simple addition of update operations on the individual context elements and attributes of context elements.
-	Add a POST method to the Individual Context Element (/contextElements/{contextElementID})
-	Add a POST method to the Attribute of individual context element (/contextElements/{contextElementID}/{attributeName})

The post operation message would include the UpdateAction and note a ContextElementList, but the updated ContextElement. In case of a ContextAttribute, the updated ContextAttribute.

Correspondingly the output message would contain the ErrorCode and one ContextElementResponse structure. 

This is an addition to the standard, and I think this would ease the context information update process. What is your opinion?

Irrelevant comment: I also agree that the subscription update should be a POST method instead of the current PUT.

Best,
Dénes
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