Patch Method for Constrained Application Protocol (CoAP)

Document Type Replaced Internet-Draft (individual)
Authors Peter Van der Stok  , Anuj Sehgal 
Last updated 2016-03-15
Replaced by draft-vanderstok-core-etch
Stream (None)
Intended RFC status (None)
Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The existing Constrained Application Protocol (CoAP) PUT method only allows a complete replacement of a resource. This does not permit applications to perform partial resource modifications. In case of resources with larger or complex data, or in situations where a resource continuity is required, replacing a resource is not an option. Several applications using CoAP will need to perform partial resource modifications. This proposal adds new CoAP methods, PATCH and iPATCH, to modify an existing CoAP resource partially.


Peter Van der Stok (
Anuj Sehgal (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)