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Re: Question about Traceability

From: Charles E. Lehner <charles.lehner@spruceid.com>
Date: Sun, 18 Apr 2021 20:05:30 -0400
To: Brent Shambaugh <brent.shambaugh@gmail.com>
Cc: W3C Credentials CG <public-credentials@w3.org>
Message-ID: <20210418200530.2831ad84@spruceid.com>
Thanks, Brent. I have passed these references on to my peers on Secure Scuttlebutt as well.

Charles

On Sun, 18 Apr 2021 17:39:06 -0500
Brent Shambaugh <brent.shambaugh@gmail.com> wrote:

> Some of the msu.edu links are broken. Here is an alternative:
> https://web.archive.org/web/20070222112705/http://www.msu.edu/user/mccarth4/McCarthy.pdf
> .
> 
> -Brent Shambaugh
> 
> GitHub: https://github.com/bshambaugh
> Website: http://bshambaugh.org/
> LinkedIN: https://www.linkedin.com/in/brent-shambaugh-9b91259
> Skype: brent.shambaugh
> Twitter: https://twitter.com/Brent_Shambaugh
> WebID: http://bshambaugh.org/foaf.rdf#me
> 
> 
> On Sun, Apr 18, 2021 at 5:35 PM Brent Shambaugh
> <brent.shambaugh@gmail.com> wrote:
> 
> > ValueFlows is based on William McCarthy's Resource Event Agent
> > Model. Lynn Foster works extensively with Bob and also with Elf
> > Palvik and Pospi.
> >
> > Here are a few links I could easily turn up
> >
> > [1] https://valueflo.ws/introduction/concepts.html
> > [2] https://github.com/holo-rea/holo-rea
> > (20)McCarthy, William E., The REA Accounting Model: A Generalized
> > Framework for Accounting Systems in a Shared Data Environment, The
> > accounting review, Vol. LVLL, No. 3, July 1982,
> > http://www.msu.edu/user/mccarth4/McCarthy.pdf
> > <https://www.msu.edu/user/mccarth4/McCarthy.pdf>
> > (21)McCarthy, William E., An REA Model of an Economic Exchange,
> > Michigan State University,
> > http://www.msu.edu/user/mccarth4/cookie--elmo--basic%20REA.ppt
> > (22)William E. McCarthy, Homepage, http://www.msu.edu/user/mccarth4
> > (15)Value Network £45 P2P Foundation, Last Modified: July 11, 2012,
> > http://p2pfoundation.net/Value_Network
> > (16)Allee, Verna et al., Value Networks and true nature of
> > collaboration, ValueNet Works and Verna Allee Associates, 2011,
> > http://www.valuenetworksandcollaboration.com/
> > (17)Value Network, http://en.wikipedia.com/wiki/Value_Network
> > Last Modified: April 8, 2013
> > (18)SENSORICA, http://www.sensorica.co/home
> > (19)Tiberius Brastaviceanu, Sensorica, an open, decentralized, and
> > self-organizing value network, May 26, 2011,
> > http://www.managementexchange.com/story/sensorica-open-enterprise-making
> >
> > I hope this helps.
> >
> > -Brent Shambaugh
> >
> > GitHub: https://github.com/bshambaugh
> > Website: http://bshambaugh.org/
> > LinkedIN: https://www.linkedin.com/in/brent-shambaugh-9b91259
> > Skype: brent.shambaugh
> > Twitter: https://twitter.com/Brent_Shambaugh
> > WebID: http://bshambaugh.org/foaf.rdf#me
> >
> >
> > On Sun, Apr 18, 2021 at 2:04 PM Charles E. Lehner <
> > charles.lehner@spruceid.com> wrote:
> >
> >> Mike,
> >>
> >> Thanks for this informative reply. I have let Bob know.
> >>
> >> Charles
> >>
> >> On Sun, 18 Apr 2021 10:56:51 -0400
> >> Mike Prorock <mprorock@mesur.io> wrote:
> >>
> >> > Excellent callout Charles.  Happy to discuss those elements a
> >> > bit on the intro call.
> >> >
> >> > The focus for the call is actually just on the VC side of things,
> >> > e.g. what are they, and how do they work, along with what is
> >> > their application in the supply chain world as a "101" level
> >> > intro into various aspects of the CCG for folks that want to
> >> > learn about things like Verifiable Credentials, their usage, and
> >> > how they fit into the CCG.
> >> >
> >> > This is, as you have called out, only a tiny piece of what is
> >> > involved in food and ag traceability: how do we record the
> >> > properties of various operations and components in the food and
> >> > ag supply chain, independent of the tracing (both forward and
> >> > backward) aspects that then link change of control and movement
> >> > of items through the supply chain.  In practice (and this will
> >> > be touched on in the 101 discussion), VCs are one part of the
> >> > data being exchanged and stored, in addition to all of the
> >> > movement data, operations, and other items related to
> >> > traceability.
> >> >
> >> > VCs in supply chain are are typically related to (as in an
> >> > inspection of a particular pallet), or represent items (package
> >> > of avocados) that are being traced, and are largely independent
> >> > of the method used to support the traceability functionality
> >> > itself, e.g. immutable ledgers storing change of control or
> >> > product movement, old school database stuff, etc  You can think
> >> > of the VCs in this case as representing the things that tracing
> >> > is applied to, along with metadata about those things.
> >> > Effectively they are a means to enable better track and trace.
> >> >
> >> > While the VCs and vocabulary items described in the Traceability
> >> > Vocab Specification themselves are a small piece of the
> >> > traceability problem, they are an important and fundamental base
> >> > on which the rest of traceability relies on, and by
> >> > standardizing on a common language along with providing the
> >> > ability to verify and securely operate on items described by
> >> > that language we aid in building a path to where various
> >> > traceability solutions can better interoperate and exchange
> >> > information either across commodities, or between different legs
> >> > on the supply chain.
> >> >
> >> > For those interested in the broader issues surrounding
> >> > traceability and food safety, the FDA has done an excellent job
> >> > at capturing many aspects of traceability in relation to food
> >> > safety, along with the data that must be collected to support
> >> > that traceability in the Proposed Traceability Rule here:
> >> >
> >> https://www.fda.gov/food/food-safety-modernization-act-fsma/fsma-proposed-rule-food-traceability
> >> >
> >> > I would note that our efforts at mesur.io are supporting the use
> >> > of VCs to represent data required by the proposed FDA rule, and
> >> > that ultimately as that rule is finalized, the Traceability
> >> > Vocab will end up with VCs that represent all aspects covered by
> >> > the proposed rule, and we welcome collaboration from folks like
> >> > Bob who clearly also have some experience on food safety and ag
> >> > track and trace side of things on the Vocab itself:
> >> > https://github.com/w3c-ccg/traceability-vocab
> >> >
> >> > Mike Prorock
> >> > CTO, Founder
> >> > https://mesur.io/
> >> >
> >> >
> >> >
> >> > On Sun, Apr 18, 2021 at 9:41 AM Charles E. Lehner <
> >> > charles.lehner@spruceid.com> wrote:
> >> >
> >> > > Dear CCG,
> >> > >
> >> > > I shared on the Secure Scuttlebutt Network about the upcoming
> >> > > "Intro to VCs in Supply Chain" and about the Traceability
> >> > > Vocab. Bob Haugen from Mikorizal Software responded with a
> >> > > question:
> >> > >
> >> > > > Looks to me like they are focusing on properties of
> >> > > > products-to-be-traced, possibly so the actual tracing does
> >> > > > not need to be done? Or not?
> >> > > >
> >> > > > Whereas Valueflows (and my previous experience in actual food
> >> > > > supply chains) focus on tracing backward through the recorded
> >> > > > material flows. https://valueflo.ws/appendix/track.html
> >> > > >
> >> > > > So if you had verifiable credentials of eg some food that was
> >> > > > poisoned (eg e. coli contamination), that fact would most
> >> > > > likely be verified (if at all) only at the point where the
> >> > > > poison was discovered, but not to the source of the
> >> > > > contamination (feeding animal body parts to other animals)
> >> > > > which would most likely not have been verified even then.
> >> > > > But by tracing back to the source CAFO (Confined Animal
> >> > > > Feeding Operation) and in some cases source animal, the
> >> > > > cause might be determined, and then the destinations of the
> >> > > > other cuts of the same contaminated animal, or all animals
> >> > > > from that CAFO, could be found for a recall.
> >> > > >
> >> > > > The US Food and Drug Administration (and I expect similar
> >> > > > institutions in other countries) require all of those
> >> > > > tracking and tracing records to be preserved and available
> >> > > > for reporting. The tracking and tracing processes are then
> >> > > > something like a web crawl through links from one event to
> >> > > > the previous or next events.s.
> >> > >
> >> > > > [...] But this would be an active issue for us if and only
> >> > > > if we are working with a network that wants to use VCs.
> >> > > >
> >> > > > P.S. my example above was a bit misleading. For feeding
> >> > > > animal body parts to other animals, the problem would be mad
> >> > > > cow disease (chronic wasting disease, or prions), and not e.
> >> > > > coli.
> >> > >
> >> > > Would anyone have an answer or reference I could pass on to
> >> > > Bob? Or might this be addressed in the 101?
> >> > >
> >> > > Thanks,
> >> > > Charles
> >> > >
> >> > >
> >>
> >>
Received on Monday, 19 April 2021 00:06:48 UTC

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