Additional Units for SenML
draft-ietf-core-senml-more-units-00
Network Working Group C. Bormann
Internet-Draft Universitaet Bremen TZI
Intended status: Standards Track September 02, 2019
Expires: March 5, 2020
Additional Units for SenML
draft-ietf-core-senml-more-units-00
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.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on March 5, 2020.
Copyright Notice
Copyright (c) 2019 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
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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
Bormann Expires March 5, 2020 [Page 1]
Internet-Draft Additional Units for SenML September 2019
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 . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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.
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 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.
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]):
Bormann Expires March 5, 2020 [Page 2]
Internet-Draft Additional Units for SenML September 2019
+--------+--------------------------------------+-------+-----------+
| Symbol | Description | Type | Reference |
+--------+--------------------------------------+-------+-----------+
| B | Byte (information content) | float | RFCthis |
| | | | |
| VA | volt-ampere (Apparent Power) | float | RFCthis |
| | | | |
| var | volt-ampere reactive (Reactive | float | RFCthis |
| | Power) | | |
| | | | |
Show full document text