I think I'm ok with Martin said - except he didn't cover how we
identity the device or target, as I believe Hannes likely wants a
single identifier, and Device and Target have distinctly separate identifiers.
Scanning Conveyance, I thought I'd cleaned this up - but haven't in a
few instances, but will soon.
Thinking about point #2 below more, I think another distinction needs
to be made, while true that a Target has proxied a device, I believe
that the mentioned shipping container described solely as a device's
MAC address is insufficient, as the container is either "Container
123", or the container is what is in the container (i.e., "Container
123 of 200 carrying XYZ widgets"), therefore there is proxying going
on in that case as well.
The same is true for a specific instance of a surveillance camera
when someone wants to determine where it is (cuz it just had a bad
guy pass in front of it). That it's a camera (verses a shipping
container) is important. That's *the* camera in a certain room or
near a certain building exit is more important. The key here is the
label (i.e., identifier) of the room the camera is in.
Interested in what other think -- because I agree consistency is
important in discussion and in our docs, and this topic has been
vague for years.
James
At 07:26 PM 8/23/2009, Thomson, Martin wrote:
>My opinion:
>
>When talking about automated determination of location information,
>the Device _is_ the Target.
>
>Using the term Device is more correct in this scenario, for two reasons:
>
> 1. The architecture is more generic. Location information is not
> always generated by automated processes. Where location isn't
> automatically generated, the subject of that information needs a label.
>
> 2. A Device is usually just a proxy for a person, who is the
> Target in the view of many consumers of this information. It might
> also be a proxy for something else - like the shipping container
> that a tracking device is attached to. Location information can be
> linked to a different Target through inference, or other more explicit means.
>
>For this second reason, Target is the right term to use when
>discussing privacy. A Target is any entity that the location
>information _could_ refer to, and who might have a stake in ensuring
>that the information is protected.
>
>The arch document should recognize the distinction between the
>two. We are building tools for Devices that aren't applicable in
>the general sense to Targets. However, we need the generic "Target" label.
>
>--Martin
>
> > -----Original Message-----
> > From: geopriv-bounces@ietf.org [mailto:geopriv-bounces@ietf.org] On
> > Behalf Of Tschofenig, Hannes (NSN - FI/Espoo)
> > Sent: Saturday, 22 August 2009 4:13 AM
> > To: geopriv@ietf.org
> > Subject: [Geopriv] Device vs. Target Terminology
> >
> > Hi all,
> >
> > the 'device' vs 'target' terminology from
> > http://www.ietf.org/rfc/rfc3693.txt is confusing for me, see:
> >
> > Target:
> > The entity whose location is desired by the Location
> > Recipient.
> > In many cases the Target will be the human "user" of a Device
> > or an object such as a vehicle or shipping container to which
> > the Device is attached. In some instances the Target will be
> > the Device itself.
> >
> > Device:
> > The technical device whereby the location is tracked as a
> > proxy
> > for the location of a Target.
> >
> > In http://www.ietf.org/id/draft-ietf-geopriv-arch-00.txt we talk about
> > the Target but the device terminology is gone:
> >
> > Target: An individual or other entity whose location is sought in
> > the Geopriv architecture. The Target is the entity whose privacy
> > Geopriv seeks to protect.
> >
> > [Btw, I only refer to entity instead of individual as in our protocol
> > mechanisms there are no 'humans' as such only identifiers.]
> >
> > The problem is that we use the term 'device' in our documents.
> > Examples:
> > http://tools.ietf.org/html/draft-ietf-geopriv-http-location-delivery-15
> > http://tools.ietf.org/id/draft-winterbottom-geopriv-held-identity-
> > extens
> > ions-09.txt
> > http://tools.ietf.org/html/draft-ietf-sipcore-location-conveyance-01
> > (Actually, we sometimes use Target and sometimes Device.)
> >
> > The differentiation between Target and Device only makes sense if there
> > is a clear difference between the two.
> >
> > My question: Should we stick with the terminology used in
> > draft-ietf-geopriv-arch-00.txt and not use device anymore? This would
> > require us to run a find/replace action over a few of our documents.
> >
> > Ciao
> > Hannes
> > _______________________________________________
> > Geopriv mailing list
> > Geopriv@ietf.org
> > https://www.ietf.org/mailman/listinfo/geopriv
>
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