Resource Discovery in Constrained RESTful Environments (CoRE) using the Constrained RESTful Application Language (CoRAL)
draft-hartke-t2trg-coral-reef-04

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Thing-to-Thing Research Group                                  K. Hartke
Internet-Draft                                                  Ericsson
Intended status: Experimental                                May 9, 2020
Expires: November 10, 2020

     Resource Discovery in Constrained RESTful Environments (CoRE)
       using the Constrained RESTful Application Language (CoRAL)
                    draft-hartke-t2trg-coral-reef-04

Abstract

   This document explores how the Constrained RESTful Application
   Language (CoRAL) might be used for two use cases in Constrained
   RESTful Environments (CoRE): CoRE Resource Discovery, which allows a
   client to discover the resources of a server given a host name or IP
   address, and CoRE Resource Directory, which provides a directory of
   resources on many servers.

Status of This Memo

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   This Internet-Draft will expire on November 10, 2020.

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Hartke                  Expires November 10, 2020               [Page 1]
Internet-Draft     CoRE Resource Discovery using CoRAL          May 2020

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Table of Contents

   1.  Preamble  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Resource Discovery  . . . . . . . . . . . . . . . . . . .   4
     2.2.  Resource Directory  . . . . . . . . . . . . . . . . . . .   5
     2.3.  Notational Conventions  . . . . . . . . . . . . . . . . .   7
   3.  Resource Metadata . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Resource Discovery  . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Well-known Resource . . . . . . . . . . . . . . . . . . .   9
       4.1.1.  Resource List Representation  . . . . . . . . . . . .   9
     4.2.  Interactions  . . . . . . . . . . . . . . . . . . . . . .  10
       4.2.1.  Getting All Resources . . . . . . . . . . . . . . . .  10
       4.2.2.  Getting Resources By Resource Type  . . . . . . . . .  11
       4.2.3.  Getting Resources By Interface Type . . . . . . . . .  12
   5.  Resource Directory  . . . . . . . . . . . . . . . . . . . . .  13
     5.1.  Resource Lookups  . . . . . . . . . . . . . . . . . . . .  13
       5.1.1.  Filter Query Representation . . . . . . . . . . . . .  13
     5.2.  Resource Registrations  . . . . . . . . . . . . . . . . .  13
       5.2.1.  Registration Unit Representation  . . . . . . . . . .  13
       5.2.2.  Registration Unit List Representation . . . . . . . .  14
     5.3.  Interactions  . . . . . . . . . . . . . . . . . . . . . .  15
       5.3.1.  Getting All Resources . . . . . . . . . . . . . . . .  15
       5.3.2.  Getting Resources By Resource Type  . . . . . . . . .  16
       5.3.3.  Getting Resources By Interface Type . . . . . . . . .  17
       5.3.4.  Getting Resources By Resource Metadata  . . . . . . .  18
       5.3.5.  Getting All Registration Units  . . . . . . . . . . .  19
       5.3.6.  Creating a Registration Unit  . . . . . . . . . . . .  20
       5.3.7.  Reading a Registration Unit . . . . . . . . . . . . .  21
       5.3.8.  Updating a Registration Unit  . . . . . . . . . . . .  22
       5.3.9.  Deleting a Registration Unit  . . . . . . . . . . . .  23
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
     7.1.  CoRE Dictionary . . . . . . . . . . . . . . . . . . . . .  24
     7.2.  CoAP Content Format . . . . . . . . . . . . . . . . . . .  26
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  27
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  27
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  27