Re: [Iotsi] New IoT effort at schema.org

Eliot Lear <lear@cisco.com> Tue, 23 August 2016 10:52 UTC

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To: Tim Coote <tim@coote.org>, David Janes <davidjanes@davidjanes.com>
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From: Eliot Lear <lear@cisco.com>
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Date: Tue, 23 Aug 2016 12:52:44 +0200
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Cc: iotsi@iab.org, Ted Hardie <ted.ietf@gmail.com>, Internet Architecture Board <iab@iab.org>
Subject: Re: [Iotsi] New IoT effort at schema.org
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Hi Tim,


On 8/23/16 10:58 AM, Tim Coote wrote:
> Hullo
>
> Based on practical experience, one of the biggest challenges is to
> have a view of the overall system state. This is partly covered in the
> concepts of interim (interstitial?) states in this paper, but bugs and
> potential bugs in composed components need to be accounted for (I
> think). This degree of uncertainty can be modelled, but probably not
> in the hardware scope of Things themselves as they tend to be
> under-powered.*
>
> However, there is a significant issue that the deployed Things do not
> necessarily tell (or know) the truth about what they are or their
> current state.

This is the exact use case we have focused on in our work.  The approach
we take to address that is MUD+802.1AR so that assertions are made by
the manufacturer of the Thing and not the Thing itself.  I'll have more
to say about the latter later.

Eliot