Additional Units for SenML
draft-ietf-core-senml-more-units-03

Document Type Active Internet-Draft (core WG)
Last updated 2019-11-04
Replaces draft-bormann-senml-more-units
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Jaime Jimenez
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Send notices to Jaime Jimenez <jaime@iki.fi>
IANA IANA review state Version Changed - Review Needed
IANA expert review state Expert Reviews OK
IANA expert review comments I reviewed the units in Table 1 and they are OK for registration in the SenML units registry. However, "seconds", "degrees", and "kilograms" in the descriptions should not be in plural but in singular ("second", "degree", "kilogram"). The author acknowledged this was a typo and this will be fixed in the next revision of the draft.
Network Working Group                                         C. Bormann
Internet-Draft                                   Universitaet Bremen TZI
Updates: 8428 (if approved)                            November 04, 2019
Intended status: Standards Track
Expires: May 7, 2020

                       Additional Units for SenML
                  draft-ietf-core-senml-more-units-03

Abstract

   The Sensor Measurement Lists (SenML) media type supports the
   indication of units for a quantity represented.  This short document
   registers a number of additional unit names in the IANA registry for
   Units in SenML.  It also defines a registry for secondary units that
   cannot be in SenML's main registry as they are derived by linear
   transformation from units already in that registry; RFC 8428 is
   updated to also accept these units.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 7, 2020.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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   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.  New Units . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  New Registry  . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The Sensor Measurement Lists (SenML, [RFC8428]) media type supports
   the indication of a unit, using the SenML field "u", for the quantity
   given as a data value in a SenML record.  For this purpose, SenML
   defines an IANA registry of defined Unit names and their meanings; in
   the present document, we call the Unit names registered there
   "primary Unit names".

   This short document registers a number of additional units in the
   IANA registry for Units in SenML that appear to be necessary for
   further adopting SenML in other Standards Development Organizations
   (SDOs).

   The document also defines a registry for secondary Unit names that
   cannot be in SenML's main registry as they are derived by linear
   transformation from units already in that registry.  [RFC8428] is
   updated to also accept these secondary Unit names in place of the
   (primary) Unit names defined in [RFC8428].

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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2.  New Units

   IANA is requested to assign new units in the "SenML Units"
   subregistry of the SenML registry [IANA.senml] (as defined in
   [RFC8428]):

   +--------+--------------------------------------+-------+-----------+
   | Symbol | Description                          | Type  | Reference |
   +--------+--------------------------------------+-------+-----------+
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