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[paho-dev] MQTT OASIS Spec open for public review
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The work to turn MQTT into a formal
standard has reached its next major milestone with the draft spec being
made available for public review. Full details can be seen in the announcement
from OASIS below including details on how to provide feedback. This is
a good opportunity to provide feedback and ensure it ends up in a form
the community is happy to move forward with. It is worth noting the charter
did not allow any major alteration from the MQTT 3.1 input spec. The main
focus being on clarity, removing ambiguities and general tidy up.
>>> OASIS announcement
<<<<<
The OASIS Message Queuing Telemetry
Transport (MQTT) TC [1] members have recently approved a Committee Specification
Draft (CSD) and submitted this specification for 30-day public review:
MQTT Version 3.1.1
Committee Specification Draft
01 / Public Review Draft 01
12 December 2013
Specification Overview:
MQTT is a Client Server publish/subscribe
messaging transport protocol. It is light weight, open, simple, and designed
so as to be easy to implement. These characteristics make it ideal for
use in many situations, including constrained environments such as for
communication in Machine to Machine (M2M) and Internet Of Things (IoT)
contexts where a small code footprint is required and/or network bandwidth
is at a premium.
The protocol runs over TCP/IP,
or over other network protocols that provide ordered, lossless, bi-directional
connections. Its features include:
- Use of the publish/subscribe
message pattern which provides one-to-many message distribution and decoupling
of applications.
- A messaging transport
that is agnostic to the content of the payload.
- Three qualities of
service for message delivery:
· "At most
once", where messages are delivered according to the best efforts
of the operating environment. Message loss can occur. This level could
be used, for example, with ambient sensor data where it does not matter
if an individual reading is lost as the next one will be published soon
after.
· "At least
once", where messages are assured to arrive but duplicates may occur.
· "Exactly
once", where message are assured to arrive exactly once. This level
could be used, for example, with billing systems where duplicate or lost
messages could lead to incorrect charges being applied.
- A small transport overhead
and protocol exchanges minimized to reduce network traffic.
- A mechanism to notify
interested parties when an abnormal disconnection occurs.
TC Description:
The OASIS Message Queuing Telemetry
Transport (MQTT) TC is developing a lightweight publish/subscribe reliable
messaging transport protocol suitable for communication in M2M/IoT contexts
where a small code footprint is required and/or network bandwidth is at
a premium.
Public Review Period:
The public review starts 13
January 2014 at 00:00 GMT and ends 11 February 2014 at 23:59 GMT.
This is an open invitation
to comment. OASIS solicits feedback from potential users, developers and
others, whether OASIS members or not, for the sake of improving the interoperability
and quality of its technical work.
URIs:
The prose specification document
and related files are available here:
Editable Source (Authoritative):
http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/csprd01/mqtt-v3.1.1-csprd01.doc
HTML:
http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/csprd01/mqtt-v3.1.1-csprd01.html
PDF:
http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/csprd01/mqtt-v3.1.1-csprd01.pdf
ZIP distribution file (complete):
For your convenience, OASIS
provides a complete package of the prose specification and related files
in a ZIP distribution file. You can download the ZIP file here:
http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/csprd01/mqtt-v3.1.1-csprd01.zip
Additional information about
the specification and the Message Queuing Telemetry Transport (MQTT) TC
can be found at the TC's public home page:
https://www.oasis-open.org/committees/mqtt/
Comments may be submitted to
the TC by any person through the use of the OASIS TC Comment Facility which
can be used by following the instructions on the TC's "Send A Comment"
page, or directly at:
https://www.oasis-open.org/committees/comments/index.php?wg_abbrev=mqtt
Comments submitted by TC non-members
for this work and for other work of this TC are publicly archived and can
be viewed at:
https://lists.oasis-open.org/archives/mqtt-comment/
All comments submitted to OASIS
are subject to the OASIS Feedback License, which ensures that the feedback
you provide carries the same obligations at least as the obligations of
the TC members. In connection with this public review of "MQTT Version
3.1.1", we call your attention to the OASIS IPR Policy [2] applicable
especially [3] to the work of this technical committee. All members of
the TC should be familiar with this document, which may create obligations
regarding the disclosure and availability of a member's patent, copyright,
trademark and license rights that read on an approved OASIS specification.
OASIS invites any persons who
know of any such claims to disclose these if they may be essential to the
implementation of the above specification, so that notice of them may be
posted to the notice page for this TC's work.
========== Additional references:
[1] Message Queuing Telemetry
Transport (MQTT) TC
https://www.oasis-open.org/committees/mqtt/
[2] http://www.oasis-open.org/who/intellectualproperty.php
[3] http://www.oasis-open.org/committees/mqtt/ipr.php
https://www.oasis-open.org/policies-guidelines/ipr#s10.3.1
Non-Assertion Mode
--
/chet
----------------
Chet Ensign
Director of Standards Development and TC Administration
OASIS: Advancing open standards for the information society
http://www.oasis-open.org
Primary: +1 973-996-2298
Mobile: +1 201-341-1393
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All the best
Dave
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