Re: [m2m-iwg] M3DA protocol proposed as part of initial contribution of

[UOMo <uomo@xxxxxxxxxxx>]

Hi,

Thanks for sharing. Similar to some other discussions and proposals, especially for the "my.car" example on page 4

speed  33 

altitude  433

I find the absense of proper Units disturbing and dangerous. How would the receiver of such message kow, if it's 33 kpH or mpH or any other unit?

Other approaches (I may share it here, or with the recently joined automotive-iwg) like Ford's OpenXC use a typesafe Units of Measurement API not so different from UOMo in fact, and once the "Raw" sensor data coming from a telemetric box is converted into its typesafe Java/Android code, it only allows something like 

BaseMeasurement<KilometersPerHour> making clear, what the value refers to. Somewhat similar, but with more modern (Java 5+) code than OSGi Measurement did over a decade ago. How this works for US cars and their dashboard, we'll see, but at least they put the unit in context already.

How about M3DA?

Thanks,

Werner  

On Wed, Jan 30, 2013 at 10:54 PM, <m2m-iwg-request@xxxxxxxxxxx> wrote:

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Today's Topics:

   1. M3DA protocol proposed as part of initial contribution of
      Mihini (was: Re: AXEDA Comments on MQTT contribution to ECLIPSE
      PAHO & OASIS) (Benjamin Cab?)


----------------------------------------------------------------------

Message: 1
Date: Wed, 30 Jan 2013 13:53:55 -0800
From: Benjamin Cab? <bcabe@xxxxxxxxxxxxxxxxxx>
To: m2m Industry Working Group <m2m-iwg@xxxxxxxxxxx>
Subject: [m2m-iwg] M3DA protocol proposed as part of initial
        contribution of Mihini (was: Re: AXEDA Comments on MQTT contribution
        to ECLIPSE PAHO & OASIS)
Message-ID: <CD2F5502.33DD4%BCabe@xxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="windows-1252"

Greetings,

During our weekly call yesterday, I briefly mentioned the e-mail below that apparently went unnoticed in what was already a pretty long e-mail thread? hence this new thread :)
We are hoping it can be a good basis for discussion, and we are looking forward to getting the group's feedback on the protocol, and discuss how it can maybe complement MQTT for some use cases during one of our weekly calls and/or in a Paho call. FWIW I won't be able to make it to next week's call, I'll be on the Eclipse Foundation booth at JFokus<http://www.jfokus.se/jfokus/?lang=en> demoing our technologies!

Cheers,
Benjamin.
_________________

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