Re: VSS and VIWI

Hi Ted,
So, could this alternate URI be exemplified ?  As this would keep the VSS model intact?

Br
Peter Winzell



On 8/20/19, 5:22 AM, "Ted Guild" <ted@w3.org> wrote:

    Regarding tree depth, one idea is to support alternate URIs so you can
    have paths that correspond to tree branches and for those to either
    transparently proxy or redirect. 
    
    We remain extremely focused on vehicle signals, they are of greater
    interest for more participants than the other 'domains' we'll want to
    have in-vehicle services for. We want the protocol to be able to be
    able to accommodate them as well. 
    
    On Mon, 2019-08-19 at 15:58 -0700, Peter Winzell wrote:
    > Hi All!
    > Some thoughts for tomorrows’ meeting.  Looking at the VIWI submission
    > and the VIWI data model and how to keep VSS intact.
    > For me it seems that the we would try to map the VSS data model
    > against the viwi.service.car definition.
    > 
    > In VIWI  we have a number of vehicle data objects defined such as
    > car/info. infoObjects where we are able to retrieve the VIN is one
    > such object:
    > 
    > /car/info/<vinidentifier> 
    > 
    > In VSS:
    > Vehicle.VehicleIdentification.VIN
    > 
    > In Vss the vin number is defined as the tree branch
    > Vehicle.VehicleIdentification.VIN
    > 
    > Vehicle — |
    >    —|
    >                     VehicleIndentification —|
    >          VIN
    >                  —|
    >                      …
    > …
    > 
    >  In this case we have two tree structures with the depth 3. This
    > seems to match pretty well ?
    > 
    > However, VIWI limits the depth of the tree structure to 3 , which in
    > the following example makes VSS incompatible with the current VIWI
    > data model :
    > 
    > In VSS:
    > Vehicle.Cabin.Seat.Row4.Pos1.Isbelted.
    > 
    > In this case we would try to match this we would have to define 3
    > more vehicle data objects:
    > /Vehicle/Cabin/Seat
    >           - available seat objects would be returned by a GET
    > request, row would be one such object which links to the 
    > /Vehicle/Row/Rowobjects
    >          - available row objects  returned by a GET request. Which
    > links to positionObjects
    > /Vehicle/Pos/Positionobjects
    >         — Isbelted element
    > 
    > This would keep the tree limit - in my view this would transform the
    > VSS data model into something not VSS although we have some sort of
    > mapping ?. The other way around is not possible since this would make
    > the current VIWI model incompatible with present in-vehicle
    > implementations if I understand correctly. So I now see us spitting
    > the spec into two separate tracks where we have  VISS/VSS and VIWI
    > submitted as the W3C signal specification. I have a feeling that both
    > tracks will suffer from adapting to each other/ and in the end we
    > could end up with something of inferior technical quality. For Volvo
    > cars we see VSS as a key element to the W3C submission and we want to
    > continue this work going forward. 
    > 
    > Br
    > Peter Winzell
    > 
    >  
    > 
    > 
    > 
    > 
    > 
    > 
    -- 
    Ted Guild <ted@w3.org>
    W3C Automotive Lead
    http://www.w3.org

Received on Tuesday, 20 August 2019 17:00:33 UTC