Dynamic Resource Linking for Constrained RESTful Environments
draft-ietf-core-dynlink-00

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Last updated 2016-10-19
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CoRE Working Group                                             Z. Shelby
Internet-Draft                                                       ARM
Intended status: Informational                                   Z. Vial
Expires: April 22, 2017                               Schneider-Electric
                                                               M. Koster
                                                             SmartThings
                                                               C. Groves
                                                                  Huawei
                                                        October 19, 2016

     Dynamic Resource Linking for Constrained RESTful Environments
                       draft-ietf-core-dynlink-00

Abstract

   For CoAP [RFC7252] Dynamic linking of state updates between
   resources, either on an endpoint or between endpoints, is defined
   with the concept of Link Bindings.  This document defines conditional
   observation attributes that work with Link Bindings or with simple
   CoAP Observe [RFC7641].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 22, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Shelby, et al.           Expires April 22, 2017                 [Page 1]
Internet-Draft      Dynamic Resource Linking for CoRE       October 2016

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Link Bindings and Observe Attributes  . . . . . . . . . . . .   3
     3.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Binding Methods . . . . . . . . . . . . . . . . . . . . .   5
     3.3.  Binding Table . . . . . . . . . . . . . . . . . . . . . .   6
     3.4.  Resource Observation Attributes . . . . . . . . . . . . .   6
   4.  Interface Descriptions  . . . . . . . . . . . . . . . . . . .   8
     4.1.  Binding . . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   8.  Changelog . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   IETF Standards for machine to machine communication in constrained
   environments describe a REST protocol and a set of related
   information standards that may be used to represent machine data and
   machine metadata in REST interfaces.  CoRE Link-format is a standard
   for doing Web Linking [RFC5988] in constrained environments.

   This document introduces the concept of a Link Binding, which defines
   a new link relation type to create a dynamic link between resources
   over which to exchange state updates.  Specifically, a Link Binding
   is a link for binding the state of 2 resources together such that
   updates to one are sent over the link to the other.  CoRE Link Format
   representations are used to configure, inspect, and maintain Link
   Bindings.  This document additionally defines a set of conditional
   Observe Attributes for use with Link Bindings and with the standalone
   CoRE Observe [RFC7641] method.

   Editor's note: This initial version is based on the text of I.D.ietf-
   core-interfaces-04.  Further work is needed around link bindings and
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